Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - DA converter (DAC) uMAX 10

_______________General Description

The MAX551/MAX552 are 12-bit, current-output, 4-quad-

rant multiplying digital-to-analog converters (DACs).

These devices are capable of providing unipolar or

bipolar outputs when operating from either a single +5V

(MAX551) or +3V (MAX552) power supply. An internal

power-on-reset circuit clears all DAC registers on

power-up, setting the DAC output voltage to 0V.

The SPI™/QSPI™ and MICROWIRE™-compatible 3-

wire serial interface saves board space and reduces

power dissipation compared with parallel-interface

devices. The MAX551/MAX552 feature double-buffered

interface logic with a 12-bit input register and a 12-bit

DAC register. Data in the DAC register sets the DAC

output voltage. Data is loaded into the input register

through the serial interface. The LOAD input transfers

data from the input register to the DAC register, updat-

ing the DAC output voltage.

The MAX551/MAX552 are available in an 8-pin DIP

package or a space-saving 10-pin µMAX package. The

µMAX package provides an asynchronous clear (CLR)

input that clears all DAC registers when pulled to GND,

setting the output voltage to 0V.

________________________Applications

Automatic Calibration

Gain Adjustment

Transducer Drivers

Process-Control I/O Boards

Digitally Controlled Filters

Motion-Controlled Systems

µP-Controlled Systems

Programmable Amplifiers/Attenuators

____________________________Features

♦ Single-Supply Operation:

+4.5V to +5.25V (MAX551)

+2.7V to +3.6V (MAX552)

♦ 12.5MHz 3-Wire Serial Interface

♦ SPI/QSPI and MICROWIRE Compatible

♦ Power-On Reset Clears DAC Output to Zero

♦ Asynchronous Clear Input Clears DAC Output

to Zero

♦ Voltage Mode or Bipolar Mode Operation with

a Single Power Supply

♦ Schmitt-Trigger Digital Inputs for Direct

Optocoupler Interface

♦ 0.4µA Supply Current

♦ 10-Pin µMAX Package

MAX551/MAX552

+3V/+5V, 12-Bit, Serial, Multiplying DACs

in 10-Pin µMAX Package

________________________________________________________________ Maxim Integrated Products 1

RFB

REF

CLR

SCLKV

GND

AGND

OUT

MAX551

MAX552

µMAX

TOP VIEW

DINLOAD

SCLK

DINLOAD

RFB

REFGND

OUT

DIP

MAX551

MAX552

19-1260; Rev 1; 9/02

PART

MAX551ACPA

MAX551BCPA

MAX551ACUB 0°C to +70°C

0°C to +70°C

TEMP RANGE

PIN-

PACKAGE

8 Plastic DIP

10 µMAX

______________Ordering Information

Ordering Information continued at end of data sheet.

SPI and QSPI are trademarks of Motorola Inc. MICROWIRE is a trademark of National Semiconductor Corp.

MAX551BCUB

MAX551AEPA

MAX551BEPA -40°C to +85°C

-40°C to +85°C

0°C to +70°C 10 µMAX

8 Plastic DIP

MAX551AEUB -40°C to +85°C 10 µMAX

MAX551BEUB -40°C to +85°C 10 µMAX

LINEARITY

(LSB)

±1/2

±1

±1/2

±1

±1/2

±1

±1/2

±1

_________________Pin Configurations

12-BIT

D/A CONVERTER

RFB

OUT

AGND*

CLR*

LOAD

REF

SCLK

GND

*µMAX PACKAGE ONLY

12-BIT

DAC REGISTER

DIN

12-BIT

SHIFT REGISTER

POWER-ON

RESET

MAX551

MAX552

________________Functional Diagram

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Summary of content (12 pages)

PAGE 1
9-1260; Rev 1; 9/02 +3V/+5V, 12-Bit, Serial, Multiplying DACs in 10-Pin µMAX Package The MAX551/MAX552 are available in an 8-pin DIP package or a space-saving 10-pin µMAX package. The µMAX package provides an asynchronous clear (CLR) input that clears all DAC registers when pulled to GND, setting the output voltage to 0V.
PAGE 2
MAX551/MAX552 +3V/+5V, 12-Bit, Serial, Multiplying DACs in 10-Pin µMAX Package ABSOLUTE MAXIMUM RATINGS VDD to GND..............................................................................6V REF, RFB to GND.................................................................±12V Digital Inputs (SCLK, DIN, LOAD, CLR) to GND .....................................................................-0.3V to 6V OUT to GND ...............................................-0.3V to (VDD + 0.3V) AGND to DGND ............
PAGE 3
+3V/+5V, 12-Bit, Serial, Multiplying DACs in 10-Pin µMAX Package (VDD = +4.5V to +5.25V, VREF = 5V, OUT = AGND = GND, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX 11 15 UNITS REFERENCE INPUT Input Resistance RREF Measured between REF and OUT 7 Input Resistance Tempco Reference -3dB Bandwidth BW VOUT = 0.31VP-P, RL = 50Ω, code = full-scale kΩ 6.
PAGE 4
MAX551/MAX552 +3V/+5V, 12-Bit, Serial, Multiplying DACs in 10-Pin µMAX Package ELECTRICAL CHARACTERISTICS—MAX552 (VDD = +2.7V to +3.6V, VREF = 2.5V, OUT = AGND = GND, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 5
+3V/+5V, 12-Bit, Serial, Multiplying DACs in 10-Pin µMAX Package (VDD = +2.7V to +3.6V, VREF = 2.5V, VOUT = AGND = GND, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DIGITAL INPUTS Input High Voltage VIH Input Low Voltage VIL Input Hysteresis HYST Input Leakage Current IIN Input Capacitance CIN 2.1 V 0.
PAGE 6
__________________________________________Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) MAX551 INL vs. REFERENCE VOLTAGE 0.3 0.2 0.6 VDD = 5.0V 0.4 -0.3 -0.4 0 0 1 0.1 1 3 4 -0.5 5 4.7 LOGIC INPUT VOLTAGE, VIN (V) FREQUENCY (MHz) 0.5 MAX551/MAX552 TOC2A VDD = 5.25V 0.3 0.2 VDD = 3.6V 0.4 0.3 0.2 INL (LSB) 0.1 0 0.1 0.2 0 0 -0.2 -0.2 -0.3 -0.3 -0.4 -0.4 -0.4 -0.5 -0.5 5.1 5.2 2.3 2.4 2.5 2.6 2.7 2.8 GAIN (dB) 2.5 2.
PAGE 7
+3V/+5V, 12-Bit, Serial, Multiplying DACs in 10-Pin µMAX Package PIN NAME FUNCTION DIP µMAX 1 1 OUT — 2 AGND 2 3 GND Digital Ground. Also Analog Ground for DIP package. 3 4 VDD Supply Voltage 4 5 LOAD 5 6 DIN 6 7 SCLK — 8 CLR Clear DAC Input. Clears the DAC register. Tie to VDD or float if not used. 7 9 REF Reference Input 8 10 RFB Feedback Resistor DAC Current Output Analog Ground Active-Low Load DAC Input.
PAGE 8
MAX551/MAX552 +3V/+5V, 12-Bit, Serial, Multiplying DACs in 10-Pin µMAX Package DIN BIT 11 MSB BIT 10 BIT 0 LSB BIT 1 tDH tDS 1 2 tCH 11 tCL SCLK LOAD SERIAL DATA INTO INPUT REGISTER tLC tSL tLD LOAD CLR tCLR Figure 2. Write-Cycle Timing Diagram Detailed Description The MAX551/MAX552 digital-to-analog converter (DAC) circuits consist of a laser-trimmed, thin-film R-2R resistor array with NMOS current switches (Figure 1).
PAGE 9
+3V/+5V, 12-Bit, Serial, Multiplying DACs in 10-Pin µMAX Package MAX551/MAX552 R4 20kΩ R2 50Ω +5V (+3V) C1 33pF RFB VDD OUT VREF REF MAX551 MAX552 SCLK LOAD R1 100Ω R5 20kΩ R3 10kΩ AGND GND DIN VOUT ( ) ARE FOR MAX552 Figure 4. Bipolar Operation Table 2.
PAGE 10
MAX551/MAX552 +3V/+5V, 12-Bit, Serial, Multiplying DACs in 10-Pin µMAX Package __________Applications Information Output Amplifier For best linearity, terminate OUT and GND at exactly 0V. In most applications, OUT is connected to an inverting op amp’s summing junction. The amplifier’s input offset voltage can degrade the DAC’s linearity by causing OUT to be terminated to a nonzero voltage.
PAGE 11
+3V/+5V, 12-Bit, Serial, Multiplying DACs in 10-Pin µMAX Package MAX551/MAX552 +5V (+3V) +5V (+3V) 10kΩ C1 VDD REF DGND RFB MAX551 MAX552 AC REFERENCE INPUT OUT MAX4167 10kΩ VOUT AGND MAX4166 REF OUT MAX551 MAX552 GND ( ) ARE FOR MAX552 +1.43V TO +12.6V MAX4167 Figure 7. Single-Supply AC Reference Input Circuit OUT 106MΩ MAX6160 VDD ADJ ( ) ARE FOR MAX552 Figure 6.
PAGE 12
MAX551/MAX552 +3V/+5V, 12-Bit, Serial, Multiplying DACs in 10-Pin µMAX Package _Ordering Information (continued) VDD REF AGND VBIAS GND OUT MAX551 MAX552 PINPACKAGE LINEARITY (LSB) PART TEMP RANGE MAX552ACPA 0°C to +70°C 8 Plastic DIP ±1/2 MAX552BCPA MAX552ACUB MAX552BCUB 0°C to +70°C 0°C to +70°C 0°C to +70°C 8 Plastic DIP 10 µMAX 10 µMAX ±1 ±1/2 ±1 MAX552AEPA MAX552BEPA MAX552AEUB MAX552BEUB -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C 8 Plastic DIP 8 Plastic DIP 10 µMA