Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - DA converter (DAC) QSOP 16

_______________General Description

The MAX5154/MAX5155 low-power, serial, voltage-out-

put, dual 12-bit digital-to-analog converters (DACs)

consume only 500µA from a single +5V (MAX5154) or

+3V (MAX5155) supply. These devices feature Rail-to-

Rail

output swing and are available in a space-saving

16-pin QSOP package. To maximize the dynamic

range, the DAC output amplifiers are configured with an

internal gain of +2V/V.

The 3-wire serial interface is SPI™/QSPI™ and

Microwire™ compatible. Each DAC has a double-

buffered input organized as an input register followed

by a DAC register, which allows the input and DAC reg-

isters to be updated independently or simultaneously

with a 16-bit serial word. Additional features include

programmable shutdown (2µA), hardware-shutdown

lockout (PDL), a separate reference voltage input for

each DAC that accepts AC and DC signals, and an

active-low clear input (CL) that resets all registers and

DACs to zero. These devices provide a programmable

logic pin for added functionality, and a serial-data out-

put pin for daisy chaining.

________________________Applications

Industrial Process Control Remote Industrial Controls

Digital Offset and Gain Microprocessor-

Adjustment Controlled Systems

Motion Control Automatic Test

Equipment (ATE)

____________________________Features

♦ 12-Bit Dual DAC with Internal Gain of +2V/V

♦ Rail-to-Rail Output Swing

♦ 12µs Settling Time

♦ Single-Supply Operation: +5V (MAX5154)

+3V (MAX5155)

♦ Low Quiescent Current: 500µA (normal operation)

2µA (shutdown mode)

♦ SPI/QSPI and Microwire Compatible

♦ Available in Space-Saving 16-Pin QSOP Package

♦ Power-On Reset Clears Registers and DACs

to Zero

♦ Adjustable Output Offset

MAX5154/MAX5155

Low-Power, Dual, 12-Bit Voltage-Output DACs

with Serial Interface

________________________________________________________________

Maxim Integrated Products

19-1316; Rev 1; 12/97

______________Ordering Information

Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.

SPI and QSPI are trademarks of Motorola, Inc.

Microwire is a trademark of National Semiconductor Corp.

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

For small orders, phone 408-737-7600 ext. 3468.

REFA

AGND

DGNDPDLCL

DOUT

16-BIT

SHIFT

CONTROL

INPUT

REG A

INPUT

REG B

SCLK

UPO REFB

DINCS

DAC B

DAC A

DAC

REG A

LOGIC

OUTPUT

DECODE

CONTROL

DAC

REG B

MAX5154

MAX5155

OUTB

OSB

OUTA

OSA

_________________________________________________________Functional Diagram

Ordering Information continued at end of data sheet.

Pin Configuration appears at end of data sheet.

INL

(LSB)

PIN-PACKAGETEMP. RANGEPART

±1/2

±1

±1/2

16 QSOP

16 Plastic DIP

16 Plastic DIP0°C to +70°C

0°C to +70°C

0°C to +70°CMAX5154ACEE

MAX5154BCPE

MAX5154ACPE

±116 QSOP0°C to +70°CMAX5154BCEE

Summary of content (16 pages)

PAGE 1
9-1316; Rev 1; 12/97 Low-Power, Dual, 12-Bit Voltage-Output DACs with Serial Interface ____________________________Features ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ______________Ordering Information ________________________Applications Industrial Process Control Digital Offset and Gain Adjustment Motion Control Remote Industrial Controls MicroprocessorControlled Systems Automatic Test Equipment (ATE) 12-Bit Dual DAC with Internal Gain of +2V/V Rail-to-Rail Output Swing 12µs Settling Time Single-Supply Operation: +5V (MAX51
PAGE 2
MAX5154/MAX5155 Low-Power, Dual, 12-Bit Voltage-Output DACs with Serial Interface ABSOLUTE MAXIMUM RATINGS Continuous Power Dissipation (TA = +70°C) Plastic DIP (derate 10.5mW/°C above +70°C) ...........842mW QSOP (derate 8.30mW/°C above +70°C) ...................667mW CERDIP (derate 10.00mW/°C above +70°C) ..............800mW Operating Temperature Ranges MAX515_ _C_ E .................................................0°C to +70°C MAX515_ _E_ E ..............................................
PAGE 3
Low-Power, Dual, 12-Bit Voltage-Output DACs with Serial Interface (VDD = +5V ±10%, VREFA = VREFB = 2.048V, RL = 10kΩ, CL = 100pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C (OS_ tied to AGND for a gain of +2V/V).) PARAMETER SYMBOL CONDITIONS MIN TYP MAX 0.13 0.40 UNITS DIGITAL OUTPUTS (DOUT, UPO) Output High Voltage VOH ISOURCE = 2mA Output Low Voltage VOL ISINK = 2mA VDD - 0.
PAGE 4
MAX5154/MAX5155 Low-Power, Dual, 12-Bit Voltage-Output DACs with Serial Interface ELECTRICAL CHARACTERISTICS—MAX5155 (VDD = +2.7V to +3.6V, VREFA = VREFB = 1.25V, RL = 10kΩ, CL = 100pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C (OS_ pins tied to AGND for a gain of +2V/V).
PAGE 5
Low-Power, Dual, 12-Bit Voltage-Output DACs with Serial Interface (VDD = +2.7V to +3.6V, VREFA = VREFB = 1.25V, RL = 10kΩ, CL = 100pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C (OS_ pins tied to AGND for a gain of +2V/V).) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLIES Positive Supply Voltage VDD Power-Supply Current IDD Power-Supply Current in Shutdown 2.7 (Note 7) IDD (SHDN) (Note 7) Reference Current in Shutdown 3.6 V 0.45 0.
PAGE 6
__________________________________________Typical Operating Characteristics (VDD = +5V, RL = 10kΩ, CL = 100pF, OS_ pins tied to AGND, TA = +25°C, unless otherwise noted.) MAX5154 -8 -10 -12 -14 -16 370 740 1110 1480 -40 CODE = 0000 (HEX) -60 -70 VREF = 2.048V RL = ∞ -55 -35 -15 1850 -50 5 25 45 65 -80 1 85 105 125 10 100 FREQUENCY (kHz) TEMPERATURE (°C) FREQUENCY (kHz) FULL-SCALE ERROR vs. RESISTIVE LOAD REFERENCE FEEDTHROUGH AT 1kHz SHUTDOWN CURRENT vs. TEMPERATURE 0 -0.25 -0.
PAGE 7
Low-Power, Dual, 12-Bit Voltage-Output DACs with Serial Interface MAX5154/MAX5155 _____________________________Typical Operating Characteristics (continued) (VDD = +3V, RL = 10kΩ, CL = 100pF, OS_pins tied to AGND, TA = +25°C, unless otherwise noted.) MAX5155 -8 -10 -12 -14 CODE = 1FFE (HEX) 520 -30 VREF = 1Vp-p @ 1VDC CODE = 1FFE (HEX) -40 THD + NOISE (dB) -6 540 VREF = 1V RL = ∞ MAX5154/5155 toc11 -4 560 SUPPLY CURRENT (µA) MAX5154/5155 toc10 0 -2 500 480 460 440 VREF = 0.67Vp-p @ 0.
PAGE 8
_____________________________Typical Operating Characteristics (continued) (VDD = +5V (MAX5154), VDD = +3V (MAX5155), RL = 10kΩ, CL = 100pF, OS_ pins tied to AGND, unless otherwise noted.) MAX5154/MAX5155 0.60 MAX5154/5155toc19 0.60 MAX5155 SUPPLY CURRENT vs. SUPPLY VOLTAGE 0.55 CODE = 1FFE (HEX) SUPPLY CURRENT (mA) CODE = 1FFE (HEX) 0.50 CODE = OOOO (HEX) 0.45 0.55 MAX5154/5155toc20 MAX5154 SUPPLY CURRENT vs. SUPPLY VOLTAGE SUPPLY CURRENT (mA) 0.50 CODE = OOOO (HEX) 0.45 0.40 0.40 4.50 4.
PAGE 9
Low-Power, Dual, 12-Bit Voltage-Output DACs with Serial Interface MAX5154/MAX5155 _____________________Pin Description OS_ R PIN NAME FUNCTION 1 AGND Analog Ground 2 OUTA DAC A Output Voltage 3 OSA DAC A Offset Adjustment 4 REFA Reference for DAC A 5 CL Active-Low Clear Input. Resets all registers to zero. DAC outputs go to 0V. 6 CS Chip-Select Input 7 DIN Serial-Data Input 8 SCLK Serial Clock Input 9 DGND Digital Ground Figure 1.
PAGE 10
MAX5154/MAX5155 Low-Power, Dual, 12-Bit Voltage-Output DACs with Serial Interface Table 1. Serial-Interface Programming Commands 16-BIT SERIAL WORD D11.......................D0 (MSB) (LSB) FUNCTION A0 C1 C0 S0 0 0 1 12-bit DAC data 0 Load input register A; DAC registers are unchanged. 1 0 1 12-bit DAC data 0 Load input register B; DAC registers are unchanged. 0 1 0 12-bit DAC data 0 Load input register A; all DAC registers are updated.
PAGE 11
Low-Power, Dual, 12-Bit Voltage-Output DACs with Serial Interface SS DIN MAX5154 MAX5155 MOSI SCLK SCK CS SPI/QSPI PORT I/O CPOL = 0, CPHA = 0 Figure 3. Connections for SPI/QSPI The general timing diagram of Figure 5 illustrates how data is acquired. Driving CS low enables the device to receive data. Otherwise, the interface control circuitry is disabled. With CS low, data at DIN is clocked into the register on the rising edge of SCLK.
PAGE 12
MAX5154/MAX5155 Low-Power, Dual, 12-Bit Voltage-Output DACs with Serial Interface tCSW CS tCSS tCSO tCL tCP tCH tCSH tCS1 SCLK tDS tDH DIN Figure 6. Detailed Serial-Interface Timing Diagram SCLK SCLK MAX5154 MAX5155 DIN SCLK MAX5154 MAX5155 DOUT CS DIN MAX5154 MAX5155 DOUT CS DIN DOUT CS TO OTHER SERIAL DEVICES Figure 7.
PAGE 13
Low-Power, Dual, 12-Bit Voltage-Output DACs with Serial Interface User-Programmable Logic Output (UPO) UPO allows an external device to be controlled through the serial interface (Table 1), thereby reducing the number of microcontroller I/O pins required. On powerup, UPO is low. PDL) Power-Down Lockout Input (P The power-down lockout pin (PDL) disables software shutdown when low. When in shutdown, transitioning PDL from high to low wakes up the part with the output set to the state prior to shutdown.
PAGE 14
MAX5154/MAX5155 Low-Power, Dual, 12-Bit Voltage-Output DACs with Serial Interface Table 3.
PAGE 15
Low-Power, Dual, 12-Bit Voltage-Output DACs with Serial Interface MAX5154/MAX5155 VDD OSA VIN REFA R OUTA CS SCLK DIN VREF R MAX5154 MAX5155 SHIFT REGISTER INPUT REG A DAC REG A DACA INPUT REG B DAC REG B DACB R1 R2 OUTB REFB VOUT R3 R4 R R [ ] [ ] = (V 2NA )( R2 )(1+ R4 ) (V [ 4096 R1+R2 R3 ] [ VOUT = GAIN – OFFSET OSB IN AGND DGND REF 2NB 4096 )( R4R3 )] NA IS THE NUMERIC VALUE OF THE INPUT CODE FOR DACA. NB IS THE NUMERIC VALUE OF THE INPUT CODE FOR DACB. Figure 14.
PAGE 16
__________________Pin Configuration TOP VIEW AGND 1 16 VDD OUTA 2 15 OUTB OSA 3 14 OSB REFA 4 CL 5 MAX5154 MAX5155 13 REFB 12 PDL CS 6 11 UPO DIN 7 10 DOUT 9 SCLK 8 DGND DIP/QSOP ___________________Chip Information TRANSISTOR COUNT: 3053 _Ordering Information (continued) PART TEMP.