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Maxim > Products > Digital-to-Analog Converters > MAX520, MAX521

MAX520, MAX521

Quad/Octal, 2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs

Serial Interface Compatible with I²C and SMBus™

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX520/MAX521 are quad/octal, 8-bit voltage-output digital-to-analog converters (DACs) with simple 2-wire serial interfaces that allow communication between multiple devices. They operate from a single +5V supply and their reference input range includes both supply rails.

The MAX521 includes rail-to-rail output buffer amplifiers for reduced system size and component count when driving loads. The MAX520's unbuffered voltage outputs reduce the device's total supply current to 4µA and provide increased accuracy at low output currents.

The MAX520/MAX521 feature a serial interface and internal software protocol, allowing communication at data rates up to 400kbps. The interface, combined with the double-buffered input configuration, allows the DAC registers to be updated individually or simultaneously. In addition, the devices can be put into a low-power shutdown mode that reduces supply current to 4µA. Power-on reset ensures the DAC outputs are at 0V when power is initially applied.

The MAX520 is available in 16-pin DIP and wide SO packages, as well as a space-saving 20-pin SSOP. The MAX521 comes in 20-pin DIP and 24-pin SO packages, as well as a space-saving 24-pin SSOP.

Data Sheet

Download	Rev 3	(PDF, 288kB)
E-Mail

Key Features

Single +5V Supply
Simple 2-Wire Serial Interface
I²C Compatible
Outputs Swing Rail to Rail:
- Unbuffered Outputs (MAX520)
- Buffered Outputs (MAX521)
1%-Accurate Trimmed Output Resistance (MAX520A)
Ultra-Low 4µA Supply Current (MAX520)
Individual DACs Have Separate Reference Inputs
Power-On Reset Clears All Latches
4µA Power-Down Mode

Applications/Uses

Digital Gain and Offset Control
General Purpose
Industrial Process Controls
Programmable Attenuators

Key Specifications:

Precision DACs (4-12 Bits)

Part Number

Power-On Reset State

Resolution
(bits)

Channels

Output Type

Reference

INL
(±LSB)

Interface

Supply Range
(V)

Oper. Temp.
(°C)

Budgetary Price

max

min

max

See Notes

MAX520A

Zero-Scale

Voltage- Unbuffered

Ext.

Serial - I²C

4.5

5.5

-55 to +125

-40 to +85

0 to +70

$4.50 @1k

MAX520B

Zero-Scale

Voltage- Unbuffered

$3.99 @1k

MAX521A

Voltage- Buffered

1.5

$6.44 @1k

MAX521B

Voltage- Buffered

$4.95 @1k

See All Precision DACs (4-12 Bits) (268)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Application Circuit

Product Guides

Signal Chain (PDF)

Reliability Reports

Reliability Report:	MAX521.pdf
Show FIT data for:
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Software/Models

none

Ordering Information

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Tape and Reel

Sample

Devices: 51-86 / 86

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Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX521ACWG			Active	SOIC(W);24 pin;164.3 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24-3*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX521ACWG+			Active	SOIC(W);24 pin;164.3 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24+3*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX521ACWG+T			Active	W.SO;24 pin Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX521ACWG-T			Active	W.SO;24 pin Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX521AEAG			Active	SSOP;24 pin;65.8 mm² Outline Drawing:21-0056 (PDF) Land Pattern: 90-0110 (PDF) Use pkgcode/variation: A24-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX521AEAG+			Active	SSOP;24 pin;65.8 mm² Outline Drawing:21-0056 (PDF) Land Pattern: 90-0110 (PDF) Use pkgcode/variation: A24+3*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX521AEAG+T			Active	SSOP;24 pin;65.8 mm² Outline Drawing:21-0056 (PDF) Land Pattern: 90-0110 (PDF) Use pkgcode/variation: A24+3*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX521AEAG-T			Active	SSOP;24 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX521AEPP			Active	PDIP(N);20 pin;217.1 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P20-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX521AEPP+			Active	PDIP(N);20 pin;217.1 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P20+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX521AEWG			Active	SOIC(W);24 pin;164.3 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX521AEWG+			Active	SOIC(W);24 pin;164.3 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24+3*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX521AEWG+T			Active	SOIC(W);24 pin;164.3 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24+3*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX521AEWG-T			Active	SOIC(W);24 pin;164.3 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX521BC/D			Active	DICE SALES;NA pin;DICE; Land Pattern: Not Applicable Use pkgcode/variation: DICE*		See data sheet
MAX521BCAG			Active	SSOP;24 pin;65.8 mm² Outline Drawing:21-0056 (PDF) Land Pattern: 90-0110 (PDF) Use pkgcode/variation: A24-3*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX521BCAG+			Active	SSOP;24 pin;65.8 mm² Outline Drawing:21-0056 (PDF) Land Pattern: 90-0110 (PDF) Use pkgcode/variation: A24+3*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX521BCAG+T			Active	SSOP;24 pin;65.8 mm² Outline Drawing:21-0056 (PDF) Land Pattern: 90-0110 (PDF) Use pkgcode/variation: A24+3*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX521BCAG-T			Active	SSOP;24 pin;65.8 mm² Outline Drawing:21-0056 (PDF) Land Pattern: 90-0110 (PDF) Use pkgcode/variation: A24-3*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX521BCPP			Active	PDIP(N);20 pin;217.1 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P20-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX521BCPP+			Active	PDIP(N);20 pin;217.1 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P20+2*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX521BCWG			Active	SOIC(W);24 pin;164.3 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24-3*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX521BCWG+			Active	SOIC(W);24 pin;164.3 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24+3*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX521BCWG+T			Active	SOIC(W);24 pin;164.3 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24+3*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX521BCWG-T			Active	SOIC(W);24 pin;164.3 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24-3*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX521BEAG			Active	SSOP;24 pin;65.8 mm² Outline Drawing:21-0056 (PDF) Land Pattern: 90-0110 (PDF) Use pkgcode/variation: A24-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX521BEAG+			Active	SSOP;24 pin;65.8 mm² Outline Drawing:21-0056 (PDF) Land Pattern: 90-0110 (PDF) Use pkgcode/variation: A24+3*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX521BEAG+T			Active	SSOP;24 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX521BEAG-T			Active	SSOP;24 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX521BEPP			Active	PDIP(N);20 pin;217.1 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P20-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX521BEPP+			Active	PDIP(N);20 pin;217.1 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P20+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX521BEWG			Active	SOIC(W);24 pin;164.3 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX521BEWG+			Active	SOIC(W);24 pin;164.3 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24+3*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX521BEWG+T			Active	SOIC(W);24 pin;164.3 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24+3*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX521BEWG-T			Active	W.SO;24 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX521BMJP			Active	CDIP(N);20 pin;218.9 mm² Outline Drawing:21-0045 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: J20-2*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis