Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - DA converter (DAC) TQFN 12

General Description

The MAX5530/MAX5531 are single, 12-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 con-

sume less than 6µA, making them desirable for low-

power and low-voltage applications. A shutdown mode

reduces overall current, including the reference input

current, to just 0.18µA. The MAX5530/MAX5531 use a

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

QSPI™, and MICROWIRE™.

At power-up, the MAX5530/MAX5531 outputs are driven

to zero scale, providing additional safety for applications

that drive valves or for other transducers that must be off

during power-up. The zero-scale outputs enable glitch-

free power-up.

The MAX5530 accepts an external reference input. The

MAX5531 contains an internal reference and provides

an external reference output. Both devices have force-

sense-configured output buffers.

The MAX5530/MAX5531 are available in a 4mm x 4mm x

0.8mm, 12-pin, thin QFN package and are guaranteed

over the extended -40°C to +85°C temperature range.

For 10-bit compatible devices, refer to the MAX5520/

MAX5521 data sheet. For 8-bit compatible devices,

refer to the MAX5510/MAX5511 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 Liquid Crystal Display (LCD) Bias

Features

♦ Ultra-Low 6µA 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

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

Output Buffers

♦ Internal Reference Sources 8mA of Current

(MAX5531)

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

Compatible Serial Interface

♦ TTL- and CMOS-Compatible Digital Inputs with

Hysteresis

♦ Glitch-Free Outputs During Power-Up

MAX5530/MAX5531

Ultra-Low-Power, 12-Bit,

Voltage-Output DACs

________________________________________________________________ Maxim Integrated Products 1

N.C.

OUT

N.C.

2SCLK

7DIN

GND

N.C.

MAX5530

MAX5531

REFIN (MAX5530)

REFOUT(MAX5531)

THIN QFN

TOP VIEW

Pin Configuration

Ordering Information

Selector Guide

19-3063; Rev 0; 1/04

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.

PART REFERENCE TOP MARK

MAX5530ETC External AACS

MAX5531ETC Internal AACT

PART TEMP RANGE PIN-PACKAGE

MAX5530ETC -40°C to +85°C 12 Thin QFN-EP*

MAX5531ETC -40°C to +85°C 12 Thin QFN-EP*

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

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp

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

Summary of content (19 pages)

PAGE 1
9-3063; Rev 0; 1/04 Ultra-Low-Power, 12-Bit, Voltage-Output DACs The MAX5530/MAX5531 are single, 12-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 6µA, making them desirable for lowpower and low-voltage applications. A shutdown mode reduces overall current, including the reference input current, to just 0.18µA.
PAGE 2
MAX5530/MAX5531 Ultra-Low-Power, 12-Bit, Voltage-Output DACs ABSOLUTE MAXIMUM RATINGS VDD to GND ..............................................................-0.3V to +6V OUT to GND ...............................................-0.3V to (VDD + 0.3V) FB 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
Ultra-Low-Power, 12-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 (MAX5530) Reference-Input Voltage Range VREFIN Reference-Input Impedance RREFIN 0 Normal operation VDD 4.1 In shutdown V MΩ 2.
PAGE 4
MAX5530/MAX5531 Ultra-Low-Power, 12-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 Coming out of shutdown (MAX5530) VDD = 5V VDD = 1.8V 3.8 Coming out of standby (MAX5531) VDD = 1.8V to 5.5V 0.
PAGE 5
Ultra-Low-Power, 12-Bit, Voltage-Output DACs (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 (MAX5530), VREF = 3.9V (MAX5531), TA = +25°C, unless otherwise noted.) 7 6 5 4 3 7 6 5 4 3 2 2 1 1 0 0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 -15 10 35 60 85 -40 10 35 60 SUPPLY CURRENT vs. LOGIC INPUT VOLTAGE VREF = 1.2V 1.5 VDD = 5V 100 10 VDD = 1.8V ALL DIGITAL INPUTS SHORTED TOGETHER 4.5 4.0 SUPPLY CURRENT (mA) VREF = 1.9V CS = LOGIC LOW CODE = 0 SUPPLY CURRENT (µA) 2.5 5.0 MAX5530 toc05 1000 85 3.5 3.0 2.5 2.
PAGE 7
Ultra-Low-Power, 12-Bit, Voltage-Output DACs OFFSET VOLTAGE vs. TEMPERATURE 0.10 0.05 0 -0.05 0.6 -0.10 -0.15 0.4 0.2 0 -0.2 -0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.6 -0.3 -0.8 -0.4 500 1000 1500 2000 2500 3000 3500 4000 4500 VDD = 5V VREF = 3.9V 0.4 -1.0 0 -0.5 -40 -15 10 35 60 85 -40 -15 10 35 85 60 DIGITAL INPUT CODE TEMPERATURE (°C) TEMPERATURE (°C) DIGITAL FEEDTHROUGH RESPONSE DAC OUTPUT LOAD REGULATION vs. OUTPUT CURRENT DAC OUTPUT LOAD REGULATION vs.
PAGE 8
Typical Operating Characteristics (continued) (VDD = 5.0V, VREF = 4.096V (MAX5530), VREF = 3.9V (MAX5531), TA = +25°C, unless otherwise noted.) OUTPUT LARGE-SIGNAL STEP RESPONSE (VDD = 5V, VREF = 3.9V) OUTPUT MINIMUM SERIES RESISTANCE vs. LOAD CAPACITANCE MAX5530 toc19 MAX5530 toc20 FOR NO OVERSHOOT VOUT 500mV/div 500 VDD 2V/div 400 300 200 VOUT 10mV/div 100 0 0.0001 0.
PAGE 9
Ultra-Low-Power, 12-Bit, Voltage-Output DACs REFERENCE LINE-TRANSIENT RESPONSE (VREF = 1.2V) REFERENCE LINE-TRANSIENT RESPONSE (VREF = 3.9V) MAX5530 toc27 MAX5530 toc28 2.8V 5.5V VDD VDD 1.8V 4.5V VREF 500mV/div VREF 500mV/div 3.9V 100µs/div 100µs/div REFERENCE LOAD TRANSIENT (VDD = 1.8V) REFERENCE LOAD TRANSIENT (VDD = 5V) MAX5530 toc30 MAX5530 toc29 REFOUT SOURCE CURRENT 0.5mA/div REFOUT SOURCE CURRENT 0.5mA/div VREFOUT 500mV/div 3.
PAGE 10
Typical Operating Characteristics (continued) (VDD = 5.0V, VREF = 4.096V (MAX5530), VREF = 3.9V (MAX5531), TA = +25°C, unless otherwise noted.) REFERENCE PSRR vs. FREQUENCY REFERENCE PSRR vs. FREQUENCY 70 60 50 40 30 20 10 80 MAX5530 toc34 VDD = 1.8V POWER-SUPPLY REJECTION RATIO (dB) MAX5530 toc33 80 POWER-SUPPLY REJECTION RATIO (dB) MAX5530/MAX5531 Ultra-Low-Power, 12-Bit, Voltage-Output DACs VDD = 5V 70 60 50 40 30 20 10 0 0 0.01 0.1 1 10 100 1000 0.01 0.
PAGE 11
Ultra-Low-Power, 12-Bit, Voltage-Output DACs PIN NAME MAX5530 MAX5531 1 1 CS 2 2 SCLK 3 3 DIN FUNCTION Active-Low Digital-Input Chip Select Serial-Interface Clock Serial-Interface Data Input 4 — REFIN — 4 REFOUT Reference Input 5, 6, 7, 11 5, 6, 7, 11 N.C. No Connection. Leave N.C. inputs unconnected (floating) or connected to GND. 8 8 VDD Power Input. Connect VDD to a 1.8V to 5.5V power supply. Bypass VDD to GND with a 0.1µF capacitor.
PAGE 12
Ultra-Low-Power, 12-Bit, Voltage-Output DACs MAX5530/MAX5531 MAX5531 Functional Diagram VDD POWERDOWN CONTROL 2-BIT PROGRAMMABLE REFERENCE INPUT REGISTER SCLK DIN CS REF BUF DAC REGISTER CONTROL LOGIC AND SHIFT REGISTER REFOUT 12-BIT DAC OUT MAX5531 FB GND Detailed Description The MAX5530/MAX5531 single, 12-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 6µA (max) supply current.
PAGE 13
Ultra-Low-Power, 12-Bit, Voltage-Output DACs CONTROL DATA BITS MSB C3 LSB C2 C1 C0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 tCH SCLK tCL tDS C3 DIN tCS0 C2 C1 D0 tDH tCSH tCSS CS tCSW tCS1 Figure 1. Timing Diagram SCLK DIN 1 C3 2 C2 3 C1 CONTROL BITS 4 C0 5 D11 6 D10 7 D9 8 D8 9 D7 10 D6 11 D5 12 D4 13 D3 14 D2 15 D1 16 D0 DATA BITS COMMAND EXECUTED CS Figure 2.
PAGE 14
MAX5530/MAX5531 Ultra-Low-Power, 12-Bit, Voltage-Output DACs Table 2. Serial-Interface Programming Commands CONTROL BITS INPUT DATA FUNCTION C3 C2 C1 C0 D11–D0 0 0 0 0 XXXXXXXXXXXX 0 0 0 1 12-bit data 0 0 1 0 — Command reserved; do not use. 0 0 1 1 — Command reserved; do not use. 0 1 0 0 — Command reserved; do not use. 0 1 0 1 — Command reserved; do not use. 0 1 1 0 — Command reserved; do not use. 0 1 1 1 — Command reserved; do not use.
PAGE 15
Ultra-Low-Power, 12-Bit, Voltage-Output DACs Shutdown Mode The MAX5530/MAX5531 feature a software-programmable shutdown mode that reduces the typical supply current and the reference input current to 0.18µA (max). Writing an input control word with control bits C[3:0] = 1110 places the device in shutdown mode (Table 2). In shutdown, the MAX5530 reference input and DAC output buffers go high impedance.
PAGE 16
MAX5530/MAX5531 Ultra-Low-Power, 12-Bit, Voltage-Output DACs Applications Information 1-Cell and 2-Cell Circuit See Figure 3 for an illustration of how to power the MAX5530/MAX5531 with either one lithium-ion battery or two alkaline batteries. The low current consumption of the devices makes the MAX5530/MAX5531 ideal for battery-powered applications.
PAGE 17
Ultra-Low-Power, 12-Bit, Voltage-Output DACs MAX5530/MAX5531 V+ LED REF ILED VOUT OUT DAC DAC REFIN TO ADC IF 2N3904 RF FB MAX5530 WE MAX5531 ILED = TO ADC FB R VREFIN × NDAC 4096 × R SENSOR CE NDAC IS THE NUMERIC VALUE OF THE DAC INPUT CODE. Figure 4. Programmable Current Source Driving an LED REFOUT BAND GAP TO ADC CL Figure 6.
PAGE 18
MAX5530/MAX5531 Ultra-Low-Power, 12-Bit, Voltage-Output DACs Power Supply and Bypassing Considerations Layout Considerations 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.
PAGE 19
Ultra-Low-Power, 12-Bit, Voltage-Output DACs 24L QFN THIN.EPS PACKAGE OUTLINE 12,16,20,24L QFN THIN, 4x4x0.8 mm 21-0139 B 1 2 PACKAGE OUTLINE 12,16,20,24L QFN THIN, 4x4x0.8 mm 21-0139 B 2 2 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.