max5822meuat Maxim Integrated Products, Inc., max5822meuat Datasheet

max5822meuat

Manufacturer Part Number

max5822meuat

Description

Max5822 Dual, 12-bit, Low-power, 2-wire, Serial Voltage-output Dac

Manufacturer

Maxim Integrated Products, Inc.

Datasheet

1.MAX5822MEUAT.pdf (13 pages)

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The MAX5822 is a dual, 12-bit, voltage-output, digital-to-

analog converter (DAC) with an I

interface that operates at clock rates up to 400kHz. The

device operates from a single 2.7V to 5.5V supply and

draws only 115µA at V

decreases current consumption to less than 1µA. The

MAX5822 features three software-selectable power-

down output impedances: 100k , 1k , and high imped-

ance. Other features include internal precision rail-to-rail

output buffers and a power-on reset (POR) circuit that

powers up the DAC in the 100k power-down mode.

The MAX5822 features a double-buffered I

serial interface that allows multiple devices to share a

single bus. All logic inputs are CMOS-logic compatible

and buffered with Schmitt triggers, allowing direct inter-

facing to optocoupled and transformer-isolated inter-

faces. The MAX5822 minimizes digital noise feedthrough

by disconnecting the clock (SCL) signal from the rest of

the device when an address mismatch is detected.

The MAX5822 is specified over the extended tempera-

ture range of -40°C to +85°C and is available in a minia-

ture 8-pin µMAX

sheet for the 10-bit version and the MAX5820 data sheet

for the 8-bit version.

19-2315; Rev 1; 3/05

*Purchase of I

Inc., or one of its sublicensed Associate Companies, conveys

a license under the Philips I

ponents in an I

to the I

µMAX is a registered trademark of Maxim Integrated Products, Inc.

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.

TOP VIEW

Digital Gain and Offset Adjustments

Programmable Voltage and Current Sources

Programmable Attenuation

VCO/Varactor Diode Control

Low-Cost Instrumentation

Battery-Powered Instrumentation

C Standard Specification.

C components from Maxim Integrated Products,

GND

ADD

SCL

C system, provided that the system conforms

________________________________________________________________ Maxim Integrated Products

package. Refer to the MAX5821 data

MAX5822

Dual, 12-Bit, Low-Power, 2-Wire, Serial

General Description

MAX

C Patent Rights to use these com-

= 3.6V. A power-down mode

Pin Configuration

Applications

-compatible, 2-wire

OUTB

OUTA

REF

SDA

C-compatible

♦ Ultra-Low Supply Current

♦ 300nA Low-Power Power-Down Mode

♦ Single 2.7V to 5.5V Supply Voltage

♦ Fast 400kHz I

♦ Schmitt-Trigger Inputs for Direct Interfacing to

♦ Rail-to-Rail Output Buffer Amplifiers

♦ Three Software-Selectable Power-Down Output

♦ Read-Back Mode for Bus and Data Checking

♦ Power-On Reset to Zero

♦ 8-Pin µMAX Package

MAX5822LEUA

MAX5822MEUA

Interface

Optocouplers

Impedances

115µA at V

135µA at V

100k , 1k , and High Impedance

PART

SDA

Voltage-Output DAC

SCL

Typical Operating Circuit

-40

C-Compatible 2-Wire Serial

= 3.6V

= 5.5V

RANGE

C to +85

TEMP

Ordering Information

REF

SDA

REF

SCL

SDA

REF

SCL

PIN-

PACKAGE

8 µMAX

MAX5822

OUTB

OUTA

Features

ADDRESS

0111 00X

1011 00X

Related parts for max5822meuat

max5822meuat Summary of contents

Page 1

... MAX5822 ADD 3 6 SCL 4 5 MAX µMAX is a registered trademark of Maxim Integrated Products, Inc. 2 *Purchase components from Maxim Integrated Products, Inc., or one of its sublicensed Associate Companies, conveys 2 a license under the Philips I C Patent Rights to use these com- 2 ponents ...

Page 2

Dual, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC ABSOLUTE MAXIMUM RATINGS V , SCL, SDA to GND ............................................-0.3V to +6V DD OUT_, REF, ADD to GND..............................-0. Maximum Current into Any Pin............................................50mA Continuous Power Dissipation (T = +70°C) A 8-Pin ...

Page 3

Dual, 12-Bit, Low-Power, 2-Wire, Serial ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.5V, GND = REF +5V +25°C.) (Note PARAMETER SYMBOL Input Hysteresis Input Leakage Current Input Capacitance DIGITAL ...

Page 4

Dual, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.5V, GND = REF +5V +25°C.) (Note PARAMETER SYMBOL STOP Condition Setup Time t SU ...

Page 5

Dual, 12-Bit, Low-Power, 2-Wire, Serial (V = +5V +25°C ZERO-CODE ERROR vs. SUPPLY VOLTAGE LOAD 0 2.7 3.4 4.1 4.8 5.5 SUPPLY VOLTAGE (V) GAIN ...

Page 6

Dual, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC (V = +5V +25°C POWER-DOWN SUPPLY CURRENT vs. SUPPLY VOLTAGE 500 Z = HIGH IMPEDANCE OUT NO LOAD 400 300 T = -40 C ...

Page 7

Dual, 12-Bit, Low-Power, 2-Wire, Serial PIN NAME 1 V Power Supply DD 2 GND Ground 3 ADD Address Select. A logic high sets the address LSB logic low sets the address LSB SCL Serial ...

Page 8

Dual, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC Table 1. Power-Down Command Bits POWER-DOWN COMMAND BITS MODE/FUNCTION PD1 PD0 Power-up device. DAC output 0 0 restored to previous value. Power-down mode 0. Power down 0 1 device with output floating. Power-down ...

Page 9

Dual, 12-Bit, Low-Power, 2-Wire, Serial SCL SDA Figure 2. START and STOP Conditions SCL SDA STOP START LEGAL STOP CONDITION SCL SDA START ILLEGAL STOP ILLEGAL EARLY STOP CONDITION Figure 3. Early STOP Conditions Acknowledge Bit (ACK) ...

Page 10

Dual, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC MSB MSB MSB MSB Figure 6. Example Write-Command Sequences (Figure 7). Setting bits A ...

Page 11

Dual, 12-Bit, Low-Power, 2-Wire, Serial Table 3. Command Byte Definitions SERIAL DATA INPUT D11 DAC DATA DAC DATA DAC DATA DAC ...

Page 12

Dual, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC MSB MSB MSB Figure 8. Example Read Word Data Sequence INPUT REGISTER A INPUT REGISTER B SERIAL ...

Page 13

... Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 © 2005 Maxim Integrated Products Voltage Output DAC BOTTOM VIEW SIDE VIEW Printed USA is a registered trademark of Maxim Integrated Products, Inc. Package Information INCHES MILLIMETERS MAX MIN DIM MIN MAX A - 0.043 - 1 ...

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