Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - DA converter (DAC) uMAX 8

General Description

The MAX5522–MAX5525 are dual, 10-bit, ultra-low-

power, voltage-output, digital-to-analog converters

(DACs) offering rail-to-rail buffered voltage outputs. The

DACs operate from a 1.8V to 5.5V supply and consume

less than 5µA, making the devices suitable for low-

power and low-voltage applications. A shutdown mode

reduces overall current, including the reference input

current, to just 0.18µA. The MAX5522–MAX5525 use a

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

QSPI™, and MICROWIRE™.

Upon power-up, the MAX5522–MAX5525 outputs are

driven to zero scale, providing additional safety for

applications that drive valves or for other transducers

that need to be off during power-up. The zero-scale

outputs enable glitch-free power-up.

The MAX5522 accepts an external reference input and

provides unity-gain outputs. The MAX5523 contains a

precision internal reference and provides a buffered

external reference output with unity-gain DAC outputs.

The MAX5524 accepts an external reference input and

provides force-sense outputs. The MAX5525 contains a

precision internal reference and provides a buffered

external reference output with force-sense DAC outputs.

The MAX5524/MAX5525 are available in a 4mm x 4mm

x 0.8mm, 12-pin, thin QFN package. The MAX5522/

MAX5523 are available in an 8-pin µMAX package. All

devices are guaranteed over the extended -40°C to

+85°C temperature range.

For 12-bit compatible devices, refer to the MAX5532–

MAX5535 data sheet. For 8-bit compatible devices,

refer to the MAX5512–MAX5515 data sheet.

Applications

Portable Battery-Powered Devices

Instrumentation

Automatic Trimming and Calibration in Factory

or Field

Programmable Voltage and Current Sources

Industrial Process Control and Remote

Industrial Devices

Remote Data Conversion and Monitoring

Chemical Sensor Cell Bias for Gas Monitors

Programmable LCD Bias

Features

♦ Ultra-Low 5µA Supply Current

♦ Shutdown Mode Reduces Supply Current to

0.18µA (max)

♦ Single +1.8V to +5.5V Supply

♦ Small 4mm x 4mm x 0.8mm Thin QFN Package

♦ Internal Reference Sources 8mA of Current

(MAX5523/MAX5525)

♦ Flexible Force-Sense-Configured Rail-to-Rail

Output Buffers

♦ Fast 16MHz, 3-Wire, SPI-/QSPI-/MICROWIRE-

Compatible Serial Interface

♦ TTL- and CMOS-Compatible Digital Inputs with

Hysteresis

♦ Glitch-Free Outputs During Power-Up

MAX5522–MAX5525

Dual, Ultra-Low-Power,

10-Bit, Voltage-Output DACs

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3064; Rev 1; 12/04

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.

*EP = Exposed paddle (internally connected to GND).

PART TEMP RANGE PIN-PACKAGE

MAX5522EUA -40°C to +85°C 8 µMAX

MAX5523EUA -40°C to +85°C 8 µMAX

MAX5524ETC -40°C to +85°C 12 Thin QFN-EP*

MAX5525ETC -40°C to +85°C 12 Thin QFN-EP*

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

Selector Guide

PART OUTPUTS REFERENCE TOP MARK

MAX5522EUA Unity gain External —

MAX5523EUA Unity gain Internal —

MAX5524ETC Force sense External AACK

MAX5525ETC Force sense Internal AACL

OUTA

GND

OUTBREFIN(MAX5522)

REFOUT(MAX5523)

DIN

SCLK

MAX5522

MAX5523

µMAX

TOP VIEW

Pin Configurations

Pin Configurations continued at end of data sheet.

Summary of content (23 pages)

PAGE 1
9-3064; Rev 1; 12/04 Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs Features The MAX5522–MAX5525 are dual, 10-bit, ultra-lowpower, voltage-output, digital-to-analog converters (DACs) offering rail-to-rail buffered voltage outputs. The DACs operate from a 1.8V to 5.5V supply and consume less than 5µA, making the devices suitable for lowpower and low-voltage applications. A shutdown mode reduces overall current, including the reference input current, to just 0.18µA.
PAGE 2
MAX5522–MAX5525 Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs ABSOLUTE MAXIMUM RATINGS VDD to GND ..............................................................-0.3V to +6V OUTA, OUTB to GND .................................-0.3V to (VDD + 0.3V) FBA, FBB to GND .......................................-0.3V to (VDD + 0.3V) SCLK, DIN, CS to GND ..............................-0.3V to (VDD + 0.3V) REFIN, REFOUT to GND ............................-0.3V to (VDD + 0.
PAGE 3
Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs (VDD = +1.8V to +5.5V, OUT_ unloaded, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER Power-Supply Rejection Ratio SYMBOL PSRR CONDITIONS MIN 1.8V ≤ VDD ≤ 5.5V TYP MAX 85 UNITS dB REFERENCE INPUT (MAX5522/MAX5524) Reference-Input Voltage Range Reference-Input Impedance VREFIN RREFIN 0 Normal operation VDD 4.1 In shutdown V MΩ 2.
PAGE 4
MAX5522–MAX5525 Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs ELECTRICAL CHARACTERISTICS (continued) (VDD = +1.8V to +5.5V, OUT_ unloaded, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS TYP VDD = 5V VDD = 1.8V 3.8 Coming out of standby (MAX5523/MAX5525) VDD = 1.8V to 5.5V 0.
PAGE 5
Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs MAX5522–MAX5525 TIMING CHARACTERISTICS (VDD = +4.5V to +5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 16.7 MHz TIMING CHARACTERISTICS (VDD = 4.5V to 5.
PAGE 6
Typical Operating Characteristics (VDD = 5.0V, VREF = 4.096V (MAX5522/MAX5524), VREF = 3.9V (MAX5523/MAX54525), TA = +25°C, unless otherwise noted.) 4.5 3.5 3.0 2.5 2.0 1.5 3.5 3.0 2.5 2.0 1.5 8 7 6 5 4 3 1.0 1.0 2 0.5 0.5 1 0 0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 0 -40 -15 10 35 60 85 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 SUPPLY VOLTAGE (V) TEMPERATURE (°C) SUPPLY VOLTAGE (V) SUPPLY CURRENT vs. TEMPERATURE (MAX5523/MAX5525) SHUTDOWN SUPPLY CURRENT vs.
PAGE 7
Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs INL vs. INPUT CODE (VDD = VREF = 1.8V) -0.2 -0.4 0.05 0.04 0.03 DNL (LSB) -0.2 INL (LSB) 0 -0.4 0.02 0.01 -0.6 -0.6 -0.8 -0.8 -0.01 -1.0 -1.0 -0.02 -1.2 0 -0.03 -1.2 400 600 800 1000 1200 0 200 400 600 800 1000 400 600 800 DIGITAL INPUT CODE DNL vs. INPUT CODE (VDD = VREF = 5V) OFFSET VOLTAGE vs. TEMPERATURE GAIN ERROR CHANGE vs. TEMPERATURE MAX5522 toc13 1.0 0.8 0.6 OFFSET VOLTAGE (mV) 0.02 0.01 0 -0.
PAGE 8
Typical Operating Characteristics (continued) (VDD = 5.0V, VREF = 4.096V (MAX5522/MAX5524), VREF = 3.9V (MAX5523/MAX54525), TA = +25°C, unless otherwise noted.) DAC OUTPUT VOLTAGE vs. OUTPUT SOURCE CURRENT VDD = 5V 2 VDD = 3V 1 MAX5522 toc20 VREF = VDD 4.5 DAC OUTPUT VOLTAGE (V) 4 MAX5522 toc21 5.0 MAX5522 toc19 VREF = VDD CODE = MIDSCALE 3 OUTPUT LARGE-SIGNAL STEP RESPONSE (VDD = 1.8V, VREF = 1.2V) DAC OUTPUT VOLTAGE vs. OUTPUT SINK CURRENT 5 CODE = MIDSCALE 4.0 3.5 VDD = 5V 3.0 2.
PAGE 9
Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs REFERENCE OUTPUT VOLTAGE vs. REFERENCE OUTPUT CURRENT 3.91 3.90 3.89 MAX5522 toc30 MAX5522 toc29 REFERENCE OUTPUT VOLTAGE (V) VDD = 5V 1.21750 REFERENCE OUTPUT VOLTAGE (mV) MAX5522 toc28 3.92 REFERENCE LINE-TRANSIENT RESPONSE (VREF = 1.2V) REFERENCE OUTPUT VOLTAGE vs. SUPPLY VOLTAGE 1.21748 1.21746 2.8V VDD 1.21744 1.21742 1.8V 1.21740 VREF 500mV/div 1.21738 1.21736 1.21734 1.21732 3.88 -500 2000 4500 7000 1.
PAGE 10
Typical Operating Characteristics (continued) (VDD = 5.0V, VREF = 4.096V (MAX5522/MAX5524), VREF = 3.9V (MAX5523/MAX54525), TA = +25°C, unless otherwise noted.) REFERENCE LOAD TRANSIENT (VDD = 5V) REFERENCE PSRR vs. FREQUENCY MAX5522 toc35 VREF 500mV/div 3.9V MAX5522 toc36 POWER-SUPPLY REJECTION RATIO (dB) 80 REFOUT SINK CURRENT 100µA/div VDD = 1.8V 70 60 50 40 30 20 10 0 0.01 200µs/div 0.1 1 10 100 1000 FREQUENCY (kHz) REFERENCE OUTPUT NOISE (0.1Hz TO 10Hz) (VDD = 1.8V, VREF = 1.
PAGE 11
Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs PIN NAME FUNCTION MAX5522 MAX5523 MAX5524 MAX5525 1 1 1 1 CS 2 2 2 2 SCLK Serial-Interface Clock Input 3 3 3 3 DIN Serial-Interface Data Input 4 — 4 — REFIN — 4 — 4 REFOUT 5, 11 5, 11 Active-Low Digital Chip-Select Input Reference Input Reference Output No Connection. Leave N.C. inputs unconnected (floating) or connected to GND. — — N.C. — — 6 6 FBB 5 5 7 7 OUTB 6 6 8 8 VDD Power Input.
PAGE 12
Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs MAX5522–MAX5525 Functional Diagrams (continued) VDD POWERDOWN CONTROL 2-BIT PROGRAMMABLE REFERENCE REF BUF REFOUT MAX5523 INPUT REGISTER SCLK DIN CS DAC REGISTER 10-BIT DAC CONTROL LOGIC AND SHIFT REGISTER OUTA DAC REGISTER INPUT REGISTER 10-BIT DAC OUTB GND VDD POWERDOWN CONTROL MAX5524 DAC REGISTER INPUT REGISTER SCLK DIN CS REFIN 10-BIT DAC CONTROL LOGIC AND SHIFT REGISTER OUTA FBA DAC REGISTER INPUT REGISTER 10-BIT DAC OUTB FBB
PAGE 13
Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs VDD POWERDOWN CONTROL 2-BIT PROGRAMMABLE REFERENCE REF BUF REFOUT MAX5525 INPUT REGISTER SCLK DIN CS DAC REGISTER 10-BIT DAC CONTROL LOGIC AND SHIFT REGISTER OUTA FBA DAC REGISTER INPUT REGISTER 10-BIT DAC OUTB FBB GND Detailed Description The MAX5522–MAX5525 dual, 10-bit, ultra-low-power, voltage-output DACs offer rail-to-rail buffered voltage outputs. The DACs operate from a 1.8V to 5.5V supply and require only 5µA (max) supply current.
PAGE 14
MAX5522–MAX5525 Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs Table 1. Serial Write Data Format CONTROL DATA BITS MSB C3 LSB C2 C1 C0 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 S1 Sub-bits S1 to S0 must be set to zero for proper operation. tCH SCLK tCL tDS C3 DIN tCS0 C2 C1 S0 tDH tCSH tCSS CS tCSW tCS1 Figure 1.
PAGE 15
Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs CONTROL BITS INPUT DATA SUB-BITS FUNCTION C3 C2 C1 C0 D9–D0 S1 AND S0 0 0 0 0 XXXXXXXXXX 00 No operation; command is ignored. 0 0 0 1 10-bit data 00 Load input register A from shift register; DAC registers unchanged; DAC outputs unchanged. 0 0 1 0 10-bit data 00 Load input register B from shift register; DAC registers unchanged; DAC outputs unchanged. 0 0 1 1 — — Command reserved. Do not use.
PAGE 16
MAX5522–MAX5525 Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs Power Modes The MAX5522–MAX5525 feature two power modes to conserve power during idle periods. In normal operation, the device is fully operational. In shutdown mode, the device is completely powered down, including the internal voltage reference in the MAX5523/MAX5525. The MAX5523/MAX5525 also offer a standby mode in which all circuitry is powered down except the internal voltage reference.
PAGE 17
Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs 1-Cell and 2-Cell Circuits See Figure 3 for an illustration of how to power the MAX5522–MAX5525 with either one lithium-ion battery or two alkaline batteries. The low current consumption of the devices make the MAX5522–MAX5525 ideal for battery-powered applications. Programmable Current Source See the circuit in Figure 4 for an illustration of how to configure the MAX5524/MAX5525 as a programmable current source for driving an LED.
PAGE 18
MAX5522–MAX5525 Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs Voltage Biasing a Current-Output Transducer See the circuit in Figure 5 for an illustration of how to configure the MAX5524/MAX5525 to bias a current-output transducer. In Figure 5, the output voltage of the MAX5524/MAX5525 is a function of the voltage drop across the transducer added to the voltage drop across the feedback resistor R.
PAGE 19
Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs Digital and AC transient signals coupling to GND can create noise at the output. Use proper grounding techniques, such as a multilayer board with a low-inductance ground plane. Wire-wrapped boards and sockets are not recommended. For optimum system performance, use printed circuit (PC) boards. Good PC board ground layout minimizes crosstalk between DAC outputs, reference inputs, and digital inputs.
PAGE 20
Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs MAX5522–MAX5525 Pin Configurations (continued) REF TOP VIEW OUTA DAC TO ADC IF RF FBA N.C. OUTA 12 11 10 FBA WE CS 1 SCLK 2 DIN 3 9 GND 8 VDD 7 OUTB MAX5525 SENSOR REF MAX5524 MAX5525 CE DAC OUTB 4 REFIN(MAX5524) REFOUT(MAX5525) FBB BAND GAP REFOUT TO ADC 5 6 N.C. FBB THIN QFN CL Figure 11.
PAGE 21
Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs 24L QFN THIN.EPS PACKAGE OUTLINE 12, 16, 20, 24L THIN QFN, 4x4x0.8mm 21-0139 C 1 2 ______________________________________________________________________________________ 21 MAX5522–MAX5525 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.
PAGE 22
MAX5522–MAX5525 Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs Package Information (continued) (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.) PACKAGE OUTLINE 12, 16, 20, 24L THIN QFN, 4x4x0.
PAGE 23
Dual, Ultra-Low-Power, 10-Bit, Voltage-Output DACs 8 INCHES DIM A A1 A2 b E ÿ 0.50±0.1 H c D e E H 0.6±0.1 L 1 1 α 0.6±0.1 S BOTTOM VIEW D MIN 0.002 0.030 MAX 0.043 0.006 0.037 0.014 0.010 0.007 0.005 0.120 0.116 0.0256 BSC 0.120 0.116 0.198 0.188 0.026 0.016 6∞ 0∞ 0.0207 BSC 8LUMAXD.EPS 4X S 8 MILLIMETERS MAX MIN 0.05 0.75 1.10 0.15 0.95 0.25 0.36 0.13 0.18 2.95 3.05 0.65 BSC 2.95 3.05 5.03 4.78 0.41 0.66 0∞ 6∞ 0.