Maxim > Products > Analog-to-Digital Converters > MAX1291, MAX1293

MAX1291, MAX1293

250ksps, +3V, 8-/4-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface

Smallest, Low-Power, Parallel-Output 12-Bit ADCs

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX1291/MAX1293 low-power, 12-bit analog-to-digital converters (ADCs) feature a successive-approximation ADC, automatic power-down, fast wake-up (2µs), an on-chip clock, +2.5V internal reference, and a high-speed, byte-wide parallel interface. They operate with a single +3V analog supply and feature a V_LOGIC pin that allows them to interface directly with a +1.8V to +5.5V digital supply.

Power consumption is only 5.7mW (V_DD = V_LOGIC) at the maximum sampling rate of 250ksps. Two software-selectable power-down modes enable the MAX1291/MAX1293 to be shut down between conversions; accessing the parallel interface returns them to normal operation. Powering down between conversions can cut supply current to under 10µA at reduced sampling rates.

Both devices offer software-configurable analog inputs for unipolar/bipolar and single-ended/pseudo-differential operation. In single-ended mode, the MAX1291 has eight input channels and the MAX1293 has four input channels (four and two input channels, respectively, when in pseudo-differential mode).

Excellent dynamic performance and low power, combined with ease of use and small package size, make these converters ideal for battery-powered and data-acquisition applications or for other circuits with demanding power consumption and space requirements.

The MAX1291/MAX1293 tri-states active-low INT when active-low CS goes high. Refer to MAX1261/MAX1263 if tri-stating active-low INT is not desired.

The MAX1291 is available in a 28-pin QSOP package, while the MAX1293 is available in a 24-pin QSOP. For pin-compatible +5V, 12-bit versions, refer to the MAX1290/MAX1292 data sheet.

Data Sheet

Download	Rev 3	(PDF, 376kB)
E-Mail

Key Features

12-Bit Resolution, ±0.5 LSB Linearity
+3V Single Operation
User-Adjustable Logic Level (+1.8V to +3.6V)
Internal +2.5V Reference
Software-Configurable, Analog Input Multiplexer
- 8-Channel Single-Ended/4-Channel Pseudo-Differential (MAX1291)
- 4-Channel Single-Ended/2-Channel Pseudo-Differential (MAX1293)
Software-Configurable, Unipolar/Bipolar Inputs
Low Power:
- 1.9mA (250ksps)
- 1.0mA (100ksps)
- 400µA (10ksps)
- 2µA (Shutdown)
Internal 3MHz Full-Power Bandwidth Track/Hold
Byte-Wide Parallel (8 + 4) Interface
Small Footprint:
- 28-Pin QSOP (MAX1291)
- 24-Pin QSOP (MAX1293)

Applications/Uses

Data Acquisition Systems
Data Logging
Energy Management
Industrial Controls Systems
Patient Monitoring
Touch Screens

Key Specifications:

Precision ADCs (< 5Msps)

Part Number

Resolution
(bits)

Input Chan.

Conv. Rate
(ksps)

Data Bus
(bits)

Diff/S.E. Input

Internal V_REF
(V)

External V_REF
(V)

Unipolar V_IN
(V)

Bipolar V_IN
(±V)

SINAD
(dB)

THD
(dB)

SFDR
(dB)

DNL
(±LSB)

INL
(±LSB)

Package/Pins

Budgetary Price

ADC

max

nominal

min

max

See Notes

MAX1291

250

µP/8

Both

2.5

3.6

2.5

1.25

-78

MAX1293

See All Precision ADCs (< 5Msps) (417)

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 Operating Circuits

Application Notes

Tutorial 748

The ABCs of ADCs: Understanding How ADC Errors Affect System Performance

Product Guides

Signal Chain (PDF)

Reliability Reports

Reliability Report:	MAX1291.pdf MAX1293.pdf
Show FIT data for:

Software/Models

none

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1291ACEI			Active	QSOP;28 pin;61.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX1291ACEI+			Active	QSOP;28 pin;61.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1291ACEI+T			Active	QSOP;28 pin Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX1291ACEI-T			Active	QSOP;28 pin Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX1291AEEI			Active	QSOP;28 pin;61.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1291AEEI+			Active	QSOP;28 pin;61.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1291AEEI+T			Active	QSOP;28 pin;61.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1291AEEI-T			Active	QSOP;28 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1291BCEI			Active	QSOP;28 pin;61.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX1291BCEI+			Active	QSOP;28 pin;61.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28+1*	0°C to +70°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
MAX1291BCEI+T			Active	QSOP;28 pin;61.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1291BCEI-T			Active	QSOP;28 pin;61.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX1291BEEI			Active	QSOP;28 pin;61.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1291BEEI+			Active	QSOP;28 pin;61.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1291BEEI+T			Active	QSOP;28 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1291BEEI-T			Active	QSOP;28 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1293ACEG			Active	QSOP;24 pin;54.2 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX1293ACEG+			Active	QSOP;24 pin;54.2 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24+2*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1293ACEG+T			Active	QSOP;24 pin Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX1293ACEG-T			Active	QSOP;24 pin Land Pattern: Not Available	0°C to +70°C	See data sheet
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1293AEEG			Active	QSOP;24 pin;54.2 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1293AEEG+			Active	QSOP;24 pin;54.2 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1293AEEG+T			Active	QSOP;24 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1293AEEG-T			Active	QSOP;24 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1293BCEG			Active	QSOP;24 pin;54.2 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX1293BCEG+			Active	QSOP;24 pin;54.2 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24+2*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1293BCEG+T			Active	QSOP;24 pin Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX1293BCEG-T			Active	QSOP;24 pin;54.2 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX1293BEEG			Active	QSOP;24 pin;54.2 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1293BEEG+			Active	QSOP;24 pin;54.2 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24+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
MAX1293BEEG+T			Active	QSOP;24 pin;54.2 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1293BEEG-T			Active	QSOP;24 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

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See All Precision ADCs (< 5Msps) (424 Products)

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-1532 Rev 3; 2003-03-27
This page last modified: 2009-09-18