Datasheet

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AMC1210I

FEATURES DESCRIPTION

APPLICATIONS

FILTER

MODULE2

ControlModule

Signal

Generator

Interrupt

Unit

Map

Interface

Module

ADS1205

ADS1204

AMC1210

INT

Resolver

ACK

IN1

CLK1

IN3

PWM1

PWM2

CLK

IN2

CLK2

IN4

CLK4

FILTER

MODULE3

FILTER

MODULE4

AD0

AD7

ALE

RST

Current

Shunt

Resistor

Input

Control

SincFilter/

Integrator

TimeMeasurement

Comparator

Filter

FILTERMODULE1

AMC1203

AMC1210

www.ti.com

.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009

Quad Digital Filter for 2nd-Order Delta-Sigma Modulator

• Four Independently-Programmable Digital

The AMC1210 is a four-channel digital filter designed

Filters

specifically for current measurement and resolver

position decoding in motor control applications. Each

• Four Window Comparators

input can receive an independent delta-sigma ( Δ Σ )

• Three Parallel and One Serial Interface

modulator bit stream. The bit streams are processed

• Comprehensive Interrupt System

by four individually-programmable digital decimation

filters. The AMC1210 also offers a flexible interface

• Programmable Input Configuration

and a comprehensive interrupt unit, allowing

• Carrier Frequency Generator for Resolver

customized digital functionality and immediate digital

Applications

threshold comparisons for over-current monitoring.

• Current Measurement

• Resolver Decoding

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2 All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (52 pages)

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AMC1210 AM C1 21 0I www.ti.com..............................................................................................................................................................
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 ELECTRICAL CHARACTERISTICS At –40°C to +125°C, AVDD, CVDD, DVDD = 5V, and BVDD = 2.7V, unless otherwise noted. The following condition must be true on the supplies: CVDD ≥ DVDD ≥ BVDD.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 Table 1. TERMINAL FUNCTIONS TERMINAL (1) (2) (3) NO.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com MODULATOR INPUT MODES TIMING CHARACTERISTICS Over recommended operating free-air temperature range at –40°C to +125°C, DVDD = +5V, CVDD = +5V, and BVDD = +2.7V, unless otherwise noted.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 SPI INTERFACE MODES TIMING CHARACTERISTICS (1) Over recommended operating free-air temperature range at –40°C to +125°C, DVDD = +5V, and BVDD = +2.7V, unless otherwise noted.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com PARALLEL MODE 1 TIMING CHARACTERISTICS (1) Over recommended operating free-air temperature range at –40°C to +125°C, DVDD = +5V, and BVDD = +2.7V, unless otherwise noted.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 PARALLEL MODE 2 TIMING CHARACTERISTICS (1) Over recommended operating free-air temperature range at –40°C to +125°C, DVDD = +5V, and BVDD = +2.7V, unless otherwise noted.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com PARALLEL MODE 3 TIMING CHARACTERISTICS (1) Over recommended operating free-air temperature range at –40°C to +125°C, DVDD = +5V, and BVDD = +2.7V, unless otherwise noted.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 TYPICAL CHARACTERISTICS At –40°C to +125°C, AVDD, CVDD, DVDD = +5V, and BVDD = +2.7V, unless otherwise noted. The following condition must be true on the supplies: CVDD ≥ DVDD ≥ BVDD.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com THEORY OF OPERATION Overview The AMC1210 is a flexible digital filter device specifically designed for motor control applications. It incorporates four independent digital filters into a digital processing block, allowing communication via SPI bus or 8-bit, multiplexed parallel I/O.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 Clock Setup The clock pin CLK controls the timing of several functions. Table 4 shows the units and features that use the CLK signal for timing. Table 4.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com During continuous read or write, the address increments after each read or write. When the address reaches 7Fh, the address counter starts over from 0. The data is written into the register map on the 16th WR of a data word.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 Parallel Mode 3 In Parallel Mode 3, the host port uses RD and WR for write and read access to the AMC1210. The current cycle is processed only when the CS input of the AMC1210 is low. WR indicates to the AMC1210 that the host processor has initiated a read or write transfer.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com Control Unit The control unit translates the modulator input data and the corresponding clock so that it can be used by the AMC1210. Four input options are available, depending on the mode of the modulator.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 Manchester Decoding Manchester signaling is a method of encoding a data signal in such a way that it can be retrieved without the need of a separate clock line.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com The comparator filter unit and the sinc filter unit differ in the way they handle input data. The comparator filter unit translates a low input signal to a '0' and a high input signal to a '1', whereas the sinc filter unit uses '–1' and '1'.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 1 (1) 2 -20 -20 -40 -60 -40 -60 -80 -80 -100 -100 -120 -120 0 312.5k 625k 937.5k 1562.5k 0 312.5k Frequency (Hz) 625k 937.5k 1562.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com 100000000 Sinc 3 10000000 Sincfast Resolution 1000000 100000 Sinc 10000 2 1000 Sinc 100 1 10 1 1 21 41 61 81 101 121 141 161 181 201 221 241 261 Oversampling Ratio Figure 16.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 Integrator Unit The integrator allows digital integration (summation) of the filter output data or the direct modulator input data when the sinc filter unit is bypassed. It consists of a parameterized integrator and a data shift unit.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 Mode 1 (TM = 1) In Mode 1, the time measure unit updates the Time Register with the elapsed amount of incoming modulator clock cycles between two rising edges of the selected sample-and-hold signal (selected by the SHS bit of the Control Parameter Register).
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com CONTROL AND INTERRUPT MODULE The control and interrupt module consists of a Signal Generator unit, a comprehensive interrupt unit and a register map. The register map contains all control parameters, output data and status bits for the AMC1210.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 Calibrating the Signal Generator The Signal Generator unit also must be in phase with the total system for resolver demodulation. This condition requires a calibration to align the phase of the Signal Generator output to the sinc filter output.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com HTL (threshold register) IN1 LTL (threshold register) Parallel Mode 1 INT (pin 20) CS WR RD AD[7:0] 0x00 0xnnn1 0x00 0xnnn2 IFH1 (interrupt register) IFL1 (interrupt register) Figure 22.
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AMC1210 www.ti.com..............................................................................................................................................................
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com All control parameters are stored in the register map. Additionally, the status of the AMC1210 is read out through the register map. The mnemonic in the succeeding register description is given in Example 1.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 BIT POSITION BIT DESCRIPTION 8 MF1 Modulator failure flag for Filter 1.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com Sinc Filter Parameter Register (addresses 0x02, 0x08, 0x0E,and 0x14) The Sinc Filter Parameter Register includes the oversampling ratio (OSR), filter enable, structure and signal mode control bits. Table 15 shows the Sinc Filter Parameter Register. Table 15.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 Integrator Parameter Register (addresses 0x03, 0x09, 0x0F and 0x15) The Integrator Parameter Register controls the integrator functionality. It specifies the integrator oversampling ratio, mode select, shift control, integrator and demodulation enable and data representation control bits.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com High-Level Threshold Register (addresses 0x04, 0x0A, 0x10 and 0x16) The High-Level Threshold Register contains the upper level value of the interrupt threshold for the comparator filter.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 Comparator Filter Parameter Register (addresses 0x06, 0x0C, 0x12 and 0x18) The Comparator Filter Parameter Register controls several parameters for the comparator filters. It specifies the oversampling ratio, three interrupt enables and structure control bits.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com Control Register (address 0x19) The Control Register controls the signal pattern generator and the interrupt and acknowledge pin behavior. It specifies the interrupt and acknowledge pin polarities, the master interrupt enable and the signal pattern generator length.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 Clock Divider Register (address 0x1B) The Clock Divider Register sets up the signal generator, the modulator clock division and the signal generator clock. Table 22 shows the Clock Divider Register. Table 22.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com Status Register (address 0x1C) The Status Register shows the overflow conditions of the timer and the integrator, and the locked status of the Manchester Decoder. When the Status Register is read, the flags MAFx, TOx and IOx are reset. Table 23 describes the Status Register. Table 23.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 Data Registers (addresses 0x1D, 0x1F, 0x21 and 0x23) The Data Registers store the latest data from either the sinc filter or the integrator output for each filter module. The data is presented in two's complement 16-bit or 32-bit format.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com APPLICATION INFORMATION The AMC1210 is designed for use in motor control systems utilizing delta-sigma modulators, particularly the ADS120x family of modulators. Resolver Applications Resolvers are used in motor control to determine the angular position and speed of the motor.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 Example 2: AMC1210 Configuration with 8kHz Carrier Frequency and 32MHz System Clock Frequency Motor control loop frequency + f CARRIER + 8kHz (3) f CLK + 32MHz (4) The carrier frequency is generated using the signal generator, which uses the CLK signal for timing.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com For this example, running the ADS1205 at 16MHz works well. Equation 8 gives the total OSR. f SOSR @ ISOR + MODULATOR + 2000 f CARRIER (8) At this point, the sinc filter oversampling ratio (SOSR) and the integrator oversampling ratio (IOSR) can be defined.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 If the drive current needed for the PWM1 or PWM2 pin is in excess of 100mA, or if filtering is desired for a cleaner signal, extra circuitry is required. Figure 25 shows a typical schematic using the AMC1210 and ADS1205 in a resolver application. 5.0V 10mF 5.0V 0.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com Current Measurement The AMC1210 can also serve as a stand-alone digital filter for modulator signals coming from current-shunt measurements.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 Period n Integrator Timer Period n+1 Accumulating Output from Digital Filter Counting Digital filter samples SH1 or SH2 CLKx Data Register Time Register Integrator Data from period n-1 Timer Data from period n-1 Integrator Data from period n Timer Data from period n Figure 27.
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AMC1210 SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com 10 ADS1203 Sinc 9 3 8 Sincfast ENOB (bits) 7 Sinc 6 2 5 Sinc 4 1 3 2 1 0 0 2 4 6 8 10 Settling Time (ms) Figure 28. Effective Number of Bits vs Settling Time (ADS1203) The user should choose a digital filter that gives the maximum ENOB for the desired settling time. If a 3.
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AMC1210 www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision C (August 2007) to Revision D ................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 16-Feb-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant AMC1210IRHAR VQFN RHA 40 2500 330.0 16.4 6.3 6.3 1.5 12.0 16.0 Q2 AMC1210IRHAT VQFN RHA 40 250 330.0 16.4 6.3 6.3 1.5 12.0 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 16-Feb-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) AMC1210IRHAR VQFN RHA 40 2500 336.6 336.6 28.6 AMC1210IRHAT VQFN RHA 40 250 336.6 336.6 28.
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