ADC121S625 - 12-Bit, 50 ksps to 200 ksps, Differential Input, Micro Power Sampling A/D Converter

Datasheet	Packaging	Samples & Pricing	Eval. Boards	Reliability	Design Tools	Knowledge Base

Features

•	True Differential Inputs
•	Guaranteed performance from 50ksps to 200ksps
•	External Reference
•	High AC Common-Mode Rejection
•	SPI™/QSPI™/MICROWIRE™/DSP compatible Serial Interface

Key Specification

Conversion Rate	50 to 200 ksps
Offset Error	0.4 LSB (typ)
Gain Error	0.05 LSB (typ)
INL	± 1 LSB (max)
DNL	± 0.75 LSB (max)
CMRR	82 dB (typ)
Power Consumption

Active, 200ksps

2.25 mW (typ)

Active, 50ksps

1.33 mW (typ)

Power Down

60 nW (typ)

General Description

The ADC121S625 is a 12-bit, 50 ksps to 200 ksps sampling Analog-to-Digital (A/D) converter that features a fully differential, high impedance analog input and an external reference. More...

Applications

•	Automotive Navigation
•	Portable Systems
•	Medical Instruments
•	Instrumentation and Control Systems
•	Motor Control
•	Direct Sensor Interface

Parameters Values

Pin and Function Compatible Family 1 ch, MSOP-8

Resolution 12 bits

Input Channels 1

Sample Rate Range (sps) 50k to 200k

Interface Type SPI/QSPI/Microwire

Differential Input Yes

Power Down, typ. at 3.6V 0.06 uW

Operating Power, typ at 3.6V, max ksps 0.110 mW

Operating Power, 3.6V, 1ksps, max. PwrDn 2.3 mW

PowerWise Rating 1 5.13 pJ/conv

INL (LSB) ±1.0

DNL (LSB) ± 0.75

ENOB 11.1 bits

SINAD 68.5 dB

SNR 70 dB

Max KSample Rate 200 ksps

Min Supply Voltage 4.5 Volt

Max Supply Voltage 5.5 Volt

Reference Source External

Temperature Min -40 deg C

Temperature Max 85 deg C

Power Down Yes

Input Sample/Hold Yes

Special Features Undefined

Data Converter Type ADC

Max Sample Rate 0.2 MSPS

Automotive Yes

Typical Performance

click for larger image

WEBENCH Live Simulation!

ADC121S625 Webench® Custom
Design/Analyze/Build It

ADC Parameters

ADC and Op Amp Supply voltage:

5 V

help

Sample Rate

Sample Rate per channel

ksps

help

Operating Conditions

Min. Ambient Temperature

degC

help

Nominal Ambient Temperature

degC

help

Max. Ambient Temperature

degC

help

Also Recommended

ADC121S021▲	Single Ended Input, Smaller Package
ADC121S655▲	200 To 500Ksps Pin Compatible Alternative
ADC121S705▲	500Ksps To 1Msps Pin Compatible Alternative

Additional Resources

Online Seminars

Simplifying A/D Converter Evaluation

Design Tools

Block Diagram

click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
ADC121S625 12-Bit, 50 ksps to 200 ksps, Differential Input, Micro Power Sampling A/D Converter	1049 Kbytes	3-Jun-05	Download
ADC121S625 12-Bit, 50 ksps to 200 ksps, Differential Input, Micro Power Sampling A/D Converter (Japanese)	868 Kbytes

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Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Weeks

Qty

$US each

ADC121S625CIMM

MINI SOIC

NOPB

260

RoHS

Download

Full production

N/A

1K+

$1.44

reel
of
1000

ZXTT
X0AC

12 weeks

1000

ADC121S625CIMMX

MINI SOIC

NOPB

260

RoHS

Download

Full production

N/A

1K+

$1.44

reel
of
3500

ZXTT
X0AC

6 weeks

20000

ADC121S625EVAL

12-Bit, 50 ksps to 200 ksps, Differential Input, Micro Power Sampling A/D Converter

Full production

N/A

$120.00

8 weeks

N/A

General Description

The ADC121S625 is a 12-bit, 50 ksps to 200 ksps sampling Analog-to-Digital (A/D) converter that features a fully differential, high impedance analog input and an external reference. While best performance is achieved with reference voltage between 500mV and 2.5V, the reference voltage can be varied from 100mV to 2.5V, with a corresponding resolution between 49µV and 1.22mV.

The output serial data is binary 2's complement, and is compatible with several standards, such as SPI™, QSPI™, MICROWIRE™, and with many common DSP serial interfaces. The differential input, low power, automatic power down, and small size make the ADC121S625 ideal for direct connection to transducers in battery operated systems or remote data acquisition applications.

Operating from a single +5V supply, the normal power consumption is reduced to a few nanowatts in the power-down mode. The ADC121S625 is a pin-compatible superior replacement for the ADS7817 and is available in the MSOP-8 package. Operation is guaranteed over the industrial temperature range of -40°C to +85°C and clock rates of 800 kHz to 3.2 MHz.

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
ADC121S625CIMM	CMOS7	0	18406	0	0	1089000	4	309006723
ADC121S625CIMMX	CMOS7	0	18406	0	0	1089000	4	309006723

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

Design Tools

Title	Size in Kbytes	Date
Evaluation Boards & Development Systems			View

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[Information as of 8-Nov-2009]