Datasheet

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

General Description

The MAX5171/MAX5173 low-power, serial, voltage-output,

14-bit digital-to-analog converters (DACs) feature a preci-

sion output amplifier in a space-saving 16-pin QSOP

package. The MAX5171 operates from a +5V single sup-

ply, and the MAX5173 operates from a +3V single supply.

The output amplifier’s inverting input is available to allow

specific gain configurations, remote sensing, and high

output current capability. This makes the MAX5171/

MAX5173 ideal for a wide range of applications, including

industrial process control. Both devices draw only 260µA

of supply current, which reduces to 1µA in shutdown

mode. In addition, the programmable power-up reset fea-

ture allows for a user-selectable output voltage of either 0

or midscale.

The 3-wire serial interface is compatible with SPI™,

QSPI™, and MICROWIRE™ standards. An input register

followed by a DAC register provides a double-buffered

input, allowing the input and DAC registers to be updated

independently or simultaneously with a 16-bit serial word.

Additional features include software and hardware shut-

down, shutdown lockout, a hardware clear pin, and a ref-

erence input capable of accepting DC and offset AC

signals. These devices provide a programmable digital

output pin for added functionality and a serial-data output

pin for daisy-chaining. All logic inputs are TTL/CMOS-

compatible and are internally buffered with Schmitt trig-

gers to allow direct interfacing to optocouplers.

The MAX5171/MAX5173 incorporate a proprietary on-chip

circuit that keeps the output voltage virtually “glitch free,”

limiting the glitches to a few millivolts during power-up.

Both devices are available in 16-pin QSOP packages and

are specified for the extended (-40°C to +85°C) tempera-

ture range. The MAX5171/MAX5173 are pin-compatible

upgrades to the 12-bit MAX5175/MAX5177. For 100% pin-

compatible DACs with an internal reference, see the 13-bit

MAX5132/MAX5133 and the 12-bit MAX5122/MAX5123

data sheets.

Applications

Features

♦ ±1 LSB INL

♦ 1µA Shutdown Current

♦ “Glitch Free” Output Voltage at Power-Up

♦ Single-Supply Operation: +5V (MAX5171)

+3V (MAX5173)

♦ Full-Scale Output Range:

+2.048V (MAX5173, V

REF

= +1.25V)

+4.096V (MAX5171, V

REF

= +2.5V )

♦ Rail-to-Rail

Output Amplifier

♦ Low THD (-80dB) in Multiplying Operation

♦ SPI/QSPI/MICROWIRE-Compatible 3-Wire

Serial Interface

♦ Programmable Shutdown Mode and Power-Up

Reset

♦ Buffered Output Capable of Driving 5kΩ || 100pF

Loads

♦ User-Programmable Digital Output Pin Allows

Serial Control of External Components

♦ Pin-Compatible Upgrade to the 12-Bit

MAX5175/MAX5177

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

For small orders, phone 1-800-835-8769.

MAX5171/MAX5173

Low-Power, Serial, 14-Bit DACs

with Force/Sense Voltage Output

________________________________________________________________

Maxim Integrated Products

19-1476; Rev 0; 4/99

Pin Configuration

Functional Diagram appears at end of data sheet.

FB V

N.C.

REF

AGND

PDL

UPO

DOUT

DGND

TOP VIEW

MAX5171

MAX5173

QSOP

OUT

SHDN

CLR

DIN

SCLK

Ordering Information

Digitally Programmable 4–20mA Current Loops

Industrial Process Control

Digital Offset and Gain Adjustment

Motion Control

Automatic Test Equipment (ATE)

Remote Industrial Controls

µP-Controlled Systems

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

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

PART

MAX5171AEEE

MAX5171BEEE

MAX5173AEEE

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

16 QSOP

MAX5173BEEE -40°C to +85°C 16 QSOP

INL

(LSB)

±1

±2

±4

Summary of content (16 pages)

PAGE 1
9-1476; Rev 0; 4/99 Low-Power, Serial, 14-Bit DACs with Force/Sense Voltage Output The MAX5171/MAX5173 low-power, serial, voltage-output, 14-bit digital-to-analog converters (DACs) feature a precision output amplifier in a space-saving 16-pin QSOP package. The MAX5171 operates from a +5V single supply, and the MAX5173 operates from a +3V single supply. The output amplifier’s inverting input is available to allow specific gain configurations, remote sensing, and high output current capability.
PAGE 2
MAX5171/MAX5173 Low-Power, Serial, 14-Bit DACs with Force/Sense Voltage Output ABSOLUTE MAXIMUM RATINGS VDD to AGND, DGND ............................................-0.3V to +6.0V AGND to DGND.....................................................-0.3V to +0.3V Digital Inputs to DGND..........................................-0.3V to +6.0V DOUT, UPO to DGND ................................-0.3V to (VDD + 0.3V) FB, OUT, REF to AGND .............................-0.3V to (VDD + 0.
PAGE 3
Low-Power, Serial, 14-Bit DACs with Force/Sense Voltage Output (VDD = +5V ±10%, VREF = +2.5V, AGND = DGND, FB = OUT, RL = 5kΩ, CL = 100pF referenced to ground, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC PERFORMANCE Voltage Output Slew Rate SR Output Settling Time To ±0.5LSB, from 10mV to full scale Output Voltage Swing (Note 3) 0.6 V/µs 12 µs 0 Current into FB -0.
PAGE 4
MAX5171/MAX5173 Low-Power, Serial, 14-Bit DACs with Force/Sense Voltage Output ELECTRICAL CHARACTERISTICS—MAX5173 (VDD = +2.7V to +3.6V, VREF = 1.25V, AGND = DGND, FB = OUT, RL = 5kΩ, CL = 100pF referenced to ground, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C).
PAGE 5
Low-Power, Serial, 14-Bit DACs with Force/Sense Voltage Output (VDD = +2.7V to +3.6V, VREF = 1.25V, AGND = DGND, FB = OUT, RL = 5kΩ, CL = 100pF referenced to ground, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C). PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC PERFORMANCE Voltage Output Slew Rate SR Output Settling Time 0.6 To ±0.5LSB, from 10mV to full-scale Output Voltage Swing (Note 3) 12 0 Current into FB -0.
PAGE 6
Typical Operating Characteristics (MAX5171: VDD = +5V, VREF = 2.5V; MAX5173: VDD = +3V, VREF = 1.25V; CL = 100pF, FB = OUT, code = 3FFF hex, TA = +25°C, unless otherwise noted.) MAX5171 NO LOAD SUPPLY CURRENT vs. SUPPLY VOLTAGE 270 260 250 240 230 220 262 260 258 256 254 252 MAX5171 toc03 264 SHUTDOWN SUPPLY CURRENT (µA) 280 1.4 MAX5171-02 290 266 NO-LOAD SUPPLY CURRENT (µA) MAX5171 toc01 300 1.3 1.2 1.1 1.0 0.9 250 210 4.4 4.6 4.8 5.0 5.2 SUPPLY VOLTAGE (V) 5.4 0.8 -50 248 5.
PAGE 7
Low-Power, Serial, 14-Bit DACs with Force/Sense Voltage Output MAX5171 DIGITAL FEEDTHROUGH MAX5171 toc11 MAX5171 toc10 VREF = 2.5VDC + 1.414Vp-p MAX5171 toc12 MAJOR-CARRY TRANSITION FFT PLOT VCS 2V/div VOUT 2mV/div VOUT/VREF 12.5dB/div VOUT 100mV/div 0 20 VSCLK 5V/div 100k FREQUENCY (Hz) 5µs/div AC-COUPLED REFERENCE VOLTAGE INPUT FREQUENCY RESPONSE MAX5171 toc14 START-UP GLITCH MAX5171-13 0 400ns/div -5 GAIN (dB) VDD 1V/div -10 -15 VOUT 10mV/div AC-COUPLED -20 VREF = 0.67Vp-p + 2.
PAGE 8
Typical Operating Characteristics (continued) (MAX5171: VDD = +5V, VREF = 2.5V; MAX5173: VDD = +3V, VREF = 1.25V; CL = 100pF, FB = OUT, code = 3FFF hex, TA = +25°C, unless otherwise noted.) MAX5173 OUTPUT VOLTAGE vs. LOAD RESISTANCE OUTPUT VOLTAGE vs. TEMPERATURE OUTPUT VOLTAGE (V) 1.2496 1.2495 MAX5173-19 1.2 1.2497 DYNAMIC RESPONSE MAX5173-20 1.4 MAX5173-18 1.2498 OUTPUT VOLTAGE (V) 3V VCS 3V/div 0 1.0 0.8 0.6 1.25V VOUT 500mV/div 0.4 1.2494 0.
PAGE 9
Low-Power, Serial, 14-Bit DACs with Force/Sense Voltage Output REFERENCE VOLTAGE INPUT FREQUENCY RESPONSE MAX5173 toc28 START-UP GLITCH MAX5173-27 0 -5.0 GAIN (dB) VDD (1V/div) -10.0 -15.0 VOUT (10mV/div) -20.0 VREF = 0.67Vp-p + 1.25VDC -25.0 0 500 1000 1500 2000 2500 3000 AC-COUPLED 50ms/div FREQUENCY (kHz) Pin Description PIN NAME 1 FB FUNCTION 2 OUT 3 RS Reset Mode Select (digital input). Connect to VDD to select midscale reset output value.
PAGE 10
MAX5171/MAX5173 Low-Power, Serial, 14-Bit DACs with Force/Sense Voltage Output Detailed Description The MAX5171/MAX5173 14-bit, serial, voltage-output DACs operate with a 3-wire serial interface. These devices include a 16-bit shift register and a doublebuffered input composed of an input register and a DAC register (see Functional Diagram). In addition, the negative terminal of the output amplifier is available.
PAGE 11
Low-Power, Serial, 14-Bit DACs with Force/Sense Voltage Output SS MOSI DIN MAX5171 MAX5173 SCLK SCK CS I/O SPI/QSPI PORT CPOL = 0, CPHA = 0 Figure 2. Connections for SPI/QSPI The MAX5171/MAX5173 accepts one 16-bit packet or two 8-bit packets sent while CS remains low. The MAX5171/MAX5173 allow the following to be configured: • Clock edge on which serial data output (DOUT) is clocked. • State of the user-programmable logic output. • Configuration of the reset state.
PAGE 12
MAX5171/MAX5173 Low-Power, Serial, 14-Bit DACs with Force/Sense Voltage Output CS COMMAND EXECUTED SCLK 1 DIN C2 8 C1 C0 D9 D8 D7 D6 9 D5 D4 16 D3 D2 D1 D0 S2 S0 S1 Figure 4. Serial-Interface Timing Diagram tCSW CS tCSO tCSS tCSH tCS1 SCLK tCH tCL tCP DIN tDS tD01 tD02 tDH DOUT Figure 5. Detailed Serial-Interface Timing Diagram microcontroller I/O pins required. During power-down, this output will retain its digital state prior to shutdown.
PAGE 13
Low-Power, Serial, 14-Bit DACs with Force/Sense Voltage Output 10k +5V/+3.3V REF VDD 10k FB VDD DAC OUT V+ FB 10k VOUT DAC OUT MAX5171 MAX5173 V- MAX5171 MAX5173 GND GND Figure 6. Unipolar Output Circuit (Rail-to-Rail) Figure 7. Bipolar Output Circuit Table 2. Unipolar Code Table (Circuit of Figure 6) Table 3.
PAGE 14
MAX5171/MAX5173 Low-Power, Serial, 14-Bit DACs with Force/Sense Voltage Output Power-Supply and Layout Considerations Bypass the power supply with a 4.7µF capacitor in parallel with a 0.1µF capacitor to AGND. Minimize the capacitor lead lengths to reduce inductance. If noise becomes an issue, use shielding and/or ferrite beads to increase isolation.
PAGE 15
Low-Power, Serial, 14-Bit DACs with Force/Sense Voltage Output MAX5171/MAX5173 +5V/ +3V +5V/+3V R1 AC REFERENCE INPUT 500mVp-p +5V/+3.3V REF MAX495 VDD R2 DAC VDD REF VL OS MAX5171 MAX5173 IOUT OUT 2N3904 FB DAC OUT GND MAX5171 MAX5173 R GND Figure 10. AC Reference Input Circuit Figure 11.
PAGE 16
Low-Power, Serial, 14-Bit DACs with Force/Sense Voltage Output QSOP.EPS MAX5171/MAX5173 Package Information Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.