Datasheet

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

General Description

The MAX5170/MAX5172 low-power, serial, voltage-out-

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

precision output amplifier in a space-saving 16-pin

QSOP package. The MAX5170 operates from a +5V

single supply and the MAX5172 operates from a +3V

single supply. Both devices draw only 280µA of supply

current, which reduces to 1µA in shutdown. In addition,

the programmable power-up reset feature allows for a

user-selectable power-up output voltage of either 0 or

midscale.

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

QSPI™, and MICROWIRE™ standards. An input regis-

ter 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 shutdown, shutdown lockout, a hardware

clear pin, and a reference input capable of accepting

DC and offset AC signals. These devices provide a pro-

grammable 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 triggers to allow direct interfacing

to optocouplers.

The MAX5170/MAX5172 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. For 100% pin-compatible DACS with internal

reference, see the 13-bit MAX5130/MAX5131 and the 12-

bit MAX5120/MAX5121 data sheets.

Applications

Industrial Process Controls

Digital Offset and Gain Adjustment

Motion Control

Automatic Test Equipment (ATE)

Remote Industrial Controls

µP-Controlled Systems

Features

♦ ±1 LSB INL

♦ 1µA Shutdown Current

♦ “Glitch Free” Output Voltage at Power-Up

♦ Single-Supply Operation

+5V (MAX5170)

+3V (MAX5172)

♦ Full-Scale Output Range

+2.048V (MAX5172, V

REF

= +1.25V)

+4.096V (MAX5170, V

REF

= +2.5V )

♦ Rail-to-Rail

Output Amplifier

♦ Adjustable Output Offset

♦ Low THD (-80dB) in Multiplying Operation

♦ SPI/QSPI/MICROWIRE-Compatible 3-Wire

Serial Interface

♦ Programmable Shutdown Mode and Power-Up

Reset (0 or Midscale)

♦ 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

MAX5174/MAX5176

MAX5170/MAX5172

Low-Power, Serial, 14-Bit DACs

with Voltage Output

________________________________________________________________ Maxim Integrated Products 1

OS V

N.C.

REF

AGND

PDL

UPO

DOUT

DGND

TOP VIEW

MAX5170

MAX5172

QSOP

OUT

SHDN

CLR

DIN

SCLK

19-1478; Rev 1; 9/02

PART

MAX5170AEEE

MAX5170BEEE

MAX5172AEEE

-40°C to +85°C

TEMP RANGE PIN-PACKAGE

16 QSOP

Pin Configuration

Ordering Information

MAX5172BEEE -40°C to +85°C 16 QSOP

INL

(LSB)

±1

±2

±4

Functional Diagram appears at end of data sheet.

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.

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 (16 pages)

PAGE 1
9-1478; Rev 1; 9/02 Low-Power, Serial, 14-Bit DACs with Voltage Output The MAX5170/MAX5172 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 MAX5170 operates from a +5V single supply and the MAX5172 operates from a +3V single supply. Both devices draw only 280µA of supply current, which reduces to 1µA in shutdown.
PAGE 2
MAX5170/MAX5172 Low-Power, Serial, 14-Bit DACs with 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) OUT, REF to AGND ...................................-0.3V to (VDD + 0.3V) OS to AGND ..........................
PAGE 3
Low-Power, Serial, 14-Bit DACs with Voltage Output (VDD = +5V ±10%, VREF = 2.5V, OS = AGND = DGND, 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.
PAGE 4
MAX5170/MAX5172 Low-Power, Serial, 14-Bit DACs with Voltage Output ELECTRICAL CHARACTERISTICS—MAX5172 (VDD = +2.7V to +3.6V, VREF = 1.25V, OS = AGND = DGND, 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 Voltage Output (VDD = 2.7V to 3.6V, VREF = 1.25V, OS = AGND = DGND, 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.
PAGE 6
Typical Operating Characteristics (MAX5170: VDD = +5V, VREF = 2.5V; MAX5172: VDD = +3V, VREF = 1.25V; CL = 100pF, OS = AGND, code = 3FFF hex, TA = +25°C, unless otherwise noted.) MAX5170 300 290 280 270 260 250 240 286 284 282 280 278 276 274 272 1.4 MAX5170/72 toc03 288 1.3 SHUTDOWN CURRENT (µA) 310 290 MAX5170/72 toc02 320 NO-LOAD SU0PPLY CURRENT (µA) MAX5170/72 toc01 330 1.2 1.1 1 0.9 270 268 230 4.6 4.8 5.0 5.2 SUPPLY VOLTAGE (V) 5.4 -50 5.6 70 90 0.8 -50 4.0 3.
PAGE 7
Low-Power, Serial, 14-Bit DACs with Voltage Output (MAX5170: VDD = +5V, VREF = 2.5V; MAX5172: VDD = +3V, VREF = 1.25V; CL = 100pF, OS = AGND, code = 3FFF hex, TA = +25°C, unless otherwise noted.) MAX5170 FFT PLOT DIGITAL FEEDTHROUGH MAX5170/72 toc12 MAX5170/72 toc11 VREF = 1.25VDC + 1.13Vp-p, at f = 10kHz MAX5170/72 toc10 MAJOR-CARRY TRANSITION 0 VCS 2V/div VOUT 2mV/div VOUT/VREF 12.
PAGE 8
Typical Operating Characteristics (continued) (MAX5170: VDD = +5V, VREF = 2.5V; MAX5172: VDD = +3V, VREF = 1.25V; CL = 100pF, OS = AGND, code = 3FFF hex, TA = +25°C, unless otherwise noted.) MAX5172 OUTPUT VOLTAGE vs. TEMPERATURE 2.0486 2.0484 2.0482 MAX5170/72 toc19 3V VCS 3V/div 0 1.5 2.048V 1.0 VOUT 500mV/div 0.5 0 10mV -0.5 -10 10 30 50 TEMPERATURE (°C) 70 90 10 1k RL (Ω) 10k 2µs/div 100k TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY DYNAMIC RESPONSE MAX5170/72 toc21 -78.
PAGE 9
Low-Power, Serial, 14-Bit DACs with Voltage Output (MAX5170: VDD = +5V, VREF = 2.5V; MAX5172: VDD = +3V, VREF = 1.25V; CL = 100pF, OS = GND, code = 3FFF hex, TA = +25°C, unless otherwise noted.) MAX5172 START-UP GLITCH MAX5170/72 toc27 0 -5 GAIN (dB) MAX5170/72 toc28 REFERENCE INPUT FREQUENCY RESPONSE 5 VDD 1V/div -10 -15 -20 VOUT 10mV/div VREF = 0.67Vp-p + 0.
PAGE 10
MAX5170/MAX5172 Low-Power, Serial, 14-Bit DACs with Voltage Output Detailed Description The MAX5170/MAX5172 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, these devices employ a rail-to-rail output amplifier and internally trimmed resistors to provide a gain of +1.638V/V, maximizing the output voltage swing.
PAGE 11
Low-Power, Serial, 14-Bit DACs with Voltage Output SS MOSI DIN MAX5170 MAX5172 SCLK SCK CS I/O SPI/QSPI PORT CPOL = 0, CPHA = 0 Figure 2. Connections for SPI and QSPI Interface The MAX5170/MAX5172 accepts one 16-bit packet or two 8-bit packets sent while CS remains low. The MAX5170/MAX5172 allow the following to be configured: • Clock edge on which serial data output (DOUT) is clocked out • State of the user-programmable logic output • Configuration of the reset state.
PAGE 12
MAX5170/MAX5172 Low-Power, Serial, 14-Bit DACs with Voltage Output CS COMMAND EXECUTED SCLK 1 DIN C1 8 C0 9 D13 D12 D11 D10 D09 D08 D07 16 D06 D05 D04 D03 D02 D01 D00 Figure 4. Serial-Interface Timing Diagram tCSW CS tCSO tCSS tCSH tCS1 SCLK tCH tCL tCP DIN tDS tD01 tD02 tDH DOUT Figure 5.
PAGE 13
Low-Power, Serial, 14-Bit DACs with Voltage Output OS +5V/+3V Unipolar Output MAX5170/MAX5172 Applications Information REF Figure 6 shows the MAX5170/MAX5172 configured for unipolar, rail-to-rail operation with a gain of +1.638V/V. Table 2 lists the codes for unipolar output voltages. The maximum output voltage is limited to VDD. Use the OS pin to introduce an offset voltage as shown in Figure 7 and described in the Offset and Buffer Configurations section.
PAGE 14
MAX5170/MAX5172 Low-Power, Serial, 14-Bit DACs with Voltage Output Offset and Buffer Configurations Power-Supply and Layout Considerations The simple circuit of Figure 7 illustrates how to introduce an offset to the output voltage. The amount of offset introduced by a voltage at the OS pin is shown in the following equation: Wire-wrap boards are not recommended. For optimum system performance, use printed circuit boards with separate analog and digital ground planes.
PAGE 15
Low-Power, Serial, 14-Bit DACs with Voltage Output MAX5170/MAX5172 DIN SCLK CS1 CS2 TO OTHER SERIAL DEVICES CS3 CS CS MAX5170 MAX5172 CS MAX5170 MAX5172 MAX5170 MAX5172 SCLK SCLK SCLK DIN DIN DIN Figure 10. Multiple MAX5170/MAX5172s Sharing Common DIN and SCLK Lines Chip Information +5V/ +3V +5V/+3V R1 AC REFERENCE INPUT 500mVp-p TRANSISTOR COUNT: 3457 MAX495 R2 VDD REF OS OUT DAC AGND MAX5170 MAX5172 GND Figure 11.
PAGE 16
Functional Diagram CS PDL SHDN VDD AGND DGND DIN SCLK SERIAL CONTROL DOUT 16-BIT SHIFT REGISTER RS LOGIC OUTPUT UPO OS DECODE CONTROL CLR MAX5170 MAX5172 INPUT REGISTER DAC REGISTER DAC OUT REF Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) QSOP.