Maxim > Products > Analog-to-Digital Converters > MAX1391, MAX1394

MAX1391, MAX1394

1.5V to 3.6V, 416ksps, 1-Channel True-Differential/2-Channel Single-Ended, 8-Bit, SAR ADCs

Ultra-Low Power and Supply Voltage Make These ADCs Ideal for Battery-Powered Applications

Overview

Technical Documents

Ordering Info

Status

Part Number	Status
MAX1391	Active: In Production. See Ordering Information for details.
MAX1394	Active: In Production. See Ordering Information for details.

Description

The MAX1391/MAX1394 micropower, serial-output, 8-bit, analog-to-digital converters (ADCs) operate with a single power supply from +1.5V to +3.6V. These ADCs feature automatic shutdown, fast wake-up, and a high-speed 3-wire interface. Power consumption is only 0.743mW (V_DD = +1.5V) at the maximum conversion rate of 416ksps. AutoShutdown™ between conversions reduces power consumption at slower throughput rates.

The MAX1391/MAX1394 require an external reference V_REF that has a wide range from 0.6V to V_DD. The MAX1391 provides one true-differential analog input that accepts signals ranging from 0 to V_REF (unipolar mode) or ± V_REF/2 (bipolar mode). The MAX1394 provides two single-ended inputs that accept signals ranging from 0 to V_REF. Analog conversion results are available through a 5MHz 3-wire SPI™-/QSPI™-/MICROWIRE™-/digital signal processor (DSP)-compatible serial interface. Excellent dynamic performance, low voltage, low power, ease of use, and small package sizes make these converters ideal for portable battery-powered data-acquisition applications, as well as other applications that demand low-power consumption and minimal space.

The MAX1391/MAX1394 are available in a space-saving (3mm x 3mm), 10-pin TDFN package. The parts operate over the extended (-40°C to +85°C) temperature range.

Data Sheet

Download	Rev 1	(PDF, 256kB)
E-Mail

An evaluation kit is available: MAX1396EVKIT

Key Features

416ksps, 8-Bit Successive-Approximation Register (SAR) ADCs
Single True-Differential Analog Input Channel with Unipolar-/Bipolar-Selected Input (MAX1391)
Dual Single-Ended Input Channel with Channel-Selected Input (MAX1394)
±0.2 LSB INL, ±0.2 LSB DNL, No Missing Codes
±0.25 LSB Total Unadjusted Error (TUE)
49dB SINAD at 100kHz Input Frequency
Single Supply Voltage (+1.5V to +3.6V)
0.97mW at 416ksps, 1.8V
0.230mW at 100ksps, 1.8V
3.1µW at 1ksps, 1.8V
< 1µA Shutdown Current
External Reference (0.6V to V_DD)
AutoShutdown Between Conversions
SPI-/QSPI-/MICROWIRE-/DSP-Compatible, 3- or 4-Wire Serial Interface
Small (3mm x 3mm), 10-Pin TDFN

Applications/Uses

Battery-Powered Instruments
Data Acquisition
Medical Instruments
Portable Data Logging
Process Control

Key Specifications:

Precision ADCs (< 5Msps)

Part Number

Resolution
(bits)

Input Chan.

Conv. Rate
(ksps)

Data Bus
(bits)

Diff/S.E. Input

External V_REF
(V)

Unipolar V_IN
(V)

Bipolar V_IN
(±V)

SNR
(dB)

SINAD
(dB)

THD
(dB)

SFDR
(dB)

DNL
(±LSB)

INL
(±LSB)

Package/Pins

Budgetary Price

ADC

max

min

max

See Notes

MAX1391

400

SPI

Diff. Only

0.6

3.6

1.8

-65

0.2

TDFN-EP/10

$1.15 @1k

MAX1394

S.E. Only

TDFN-EP/10

$1.15 @1k

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 Circuit

Product Guides

Signal Chain (PDF)

Reliability Reports

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Software/Models

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Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1391ETB+			Active		TDFN-EP;10 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1391ETB+T			Active		TDFN-EP;10 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1391ETB-T			Active		TDFN-EP;10 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1391MTB-T		N/A	No Longer Available	MAX1391ETB+T	TDFN-EP;10 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033-1*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX1394ETB+T			Active		TDFN-EP;10 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1394ETB-T			Active		TDFN-EP;10 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1394MTB+T		N/A	No Longer Available	MAX1394ETB+T	TDFN; Land Pattern: Not Available	-55°C to +125°C	See data sheet
MAX1394MTB-T		N/A	No Longer Available	MAX1394ETB+T	TDFN-EP;10 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033-1*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis

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)

Evaluation Kits

MAX1396EVKIT

Evaluation Kit for the MAX1391, MAX1392, MAX1393, MAX1394, MAX1395, and MAX1396

More Information

Topmark Coding	MAX1391
Topmark Coding	MAX1394

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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.: 19-3720 Rev 1; 2010-01-05
This page last modified: 2010-01-05