Rainbow-electronics MAX5812 User Manual download pdf

General Description

The MAX5812 is a single, 12-bit voltage-output, digital-to-

analog converter (DAC) with an I

C™-compatible 2-wire

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

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

draws only 100µA at V

= 3.6V. A low-power power-

down mode decreases current consumption to less than

1µA. The MAX5812 features three software-selectable

power-down output impedances: 100kΩ, 1kΩ, and high

impedance. Other features include an internal precision

Rail-to-Rail

output buffer and a power-on reset circuit

that powers up the DAC in the 100kΩ power-down mode.

The MAX5812 features a double-buffered I

C-compatible

serial interface that allows multiple devices to share a sin-

gle bus. All logic inputs are CMOS-logic compatible and

buffered with Schmitt triggers, allowing direct interfacing

to optocoupled and transformer-isolated interfaces. The

MAX5812 minimizes digital noise feedthrough by discon-

necting the clock (SCL) signal from the rest of the device

when an address mismatch is detected.

The MAX5812 is specified over the extended temperature

range of -40°C to +85°C and is available in a space-sav-

ing 6-pin SOT23 package. Refer to the MAX5811 for the

10-bit version.

Applications

Digital Gain and Offset Adjustments

Programmable Voltage and Current Sources

Programmable Attenuation

VCO/Varactor Diode Control

Low-Cost Instrumentation

Battery-Operated Equipment

Features

♦ Ultra-Low Supply Current

100µA at V

= 3.6V

130µA at V

= 5.5V

♦ 300nA Low-Power Power-Down Mode

♦ Single 2.7V to 5.5V Supply Voltage

♦ Fast 400kHz I

C-Compatible 2-Wire Serial

Interface

♦ Schmitt-Trigger Inputs for Direct Interfacing to

Optocouplers

♦ Rail-to-Rail Output Buffer Amplifier

♦ Three Software-Selectable Power-Down Output

Impedances

100kΩ, 1kΩ, and High Impedance

♦ Read-Back Mode for Bus and Data Checking

♦ Power-On Reset to Zero

♦ Miniature 6-Pin SOT23 Package

MAX5812

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

Voltage-Output DAC

________________________________________________________________ Maxim Integrated Products 1

SCL

SDA

ADD

GND

OUT

MAX5812

SOT23

TOP VIEW

Pin Configuration

Ordering Information

µC

SDA

SCL

SDA

SCL

OUT

MAX5812

Typical Operating Circuit

19-2340; Rev 0; 1/02

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 TEMP RANGE

PIN-

PACKAGE

TOP

MARK

MAX5812LEUT -40°C to +85°C 6 SOT23 AAYT

MAX5812MEUT -40°C to +85°C 6 SOT23 AAYV

MAX5812NEUT -40°C to +85°C 6 SOT23 AAYX

MAX5812PEUT -40°C to +85°C 6 SOT23 AAYZ

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

C is a trademark of Philips Corporation.

Selector Guide appears at end of data sheet.

Functional Diagram appears at end of data sheet.

1 2 3 4 5 6 ... 12 13

Voltage-Output DAC 1

Summary of Contents

Page 1 - Voltage-Output DAC

General DescriptionThe MAX5812 is a single, 12-bit voltage-output, digital-to-analog converter (DAC) with an I2C™-compatible 2-wireinterface that oper

Page 2

MAX581212-Bit Low-Power, 2-Wire, Serial Voltage-Output DAC10 ______________________________________________________________________________________Tab

Page 3

MAX581212-Bit Low-Power, 2-Wire, Serial Voltage-Output DAC______________________________________________________________________________________ 11Rea

Page 4

MAX5812the digital input serially into the DAC. Schmitt-triggerbuffered inputs allow slow transition interfaces such asoptocouplers to interface direc

Page 5

MAX581212-Bit Low-Power, 2-Wire, Serial Voltage-Output DACMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely em

Page 6

MAX581212-Bit Low-Power, 2-Wire, Serial Voltage-Output DAC2 _______________________________________________________________________________________ABS

Page 7

MAX581212-Bit Low-Power, 2-Wire, Serial Voltage-Output DAC_______________________________________________________________________________________ 3Not

Page 8

MAX581212-Bit Low-Power, 2-Wire, Serial Voltage-Output DAC4 _______________________________________________________________________________________-4-

Page 9

MAX581212-Bit Low-Power, 2-Wire, Serial Voltage-Output DAC_______________________________________________________________________________________ 50-0

Page 10

MAX581212-Bit Low-Power, 2-Wire, Serial Voltage-Output DAC6 _______________________________________________________________________________________Typ

Page 11

MAX581212-Bit Low-Power, 2-Wire, Serial Voltage-Output DAC_______________________________________________________________________________________ 7Det

Page 12

MAX581212-Bit Low-Power, 2-Wire, Serial Voltage-Output DAC8 _______________________________________________________________________________________and

Page 13

MAX581212-Bit Low-Power, 2-Wire, Serial Voltage-Output DAC_______________________________________________________________________________________ 9low

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Rainbow-electronics MAX5812 User Manual

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Summary of Contents

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