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CS

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SDATA

SCLK

ADC121S051

ADC121S051

www.ti.com

SNAS302I – JULY 2005 – REVISED JANUARY 2014

ADC121S051 Single Channel, 200 to 500 ksps, 12-Bit A/D Converter

Check for Samples: ADC121S051

1

FEATURES

DESCRIPTION

The ADC121S051 is a low-power, single channel

2

•

Specified Over a Range of Sample Rates.

CMOS 12-bit analog-to-digital converter with a high-

•

6-lead WSON and SOT-23 Packages

speed

serial

interface.

Unlike

the

conventional

•

Variable Power Management

practice of specifying performance at a single sample

rate only, the ADC121S051 is fully specified over a

•

Single Power Supply with 2.7V - 5.25V Range

sample rate range of 200 ksps to 500 ksps. The

•

SPI™/QSPI™/MICROWIRE/DSP Compatible

converter is based upon a successive-approximation

register architecture with an internal track-and-hold

APPLICATIONS

circuit.

•

Portable Systems

The output serial data is straight binary, and is

•

Remote Data Acquisition

compatible with several standards, such as SPI™,

QSPI™, MICROWIRE, and many common DSP

•

Instrumentation and Control Systems

serial interfaces.

KEY SPECIFICATIONS

The ADC121S051 operates with a single supply that

can range from +2.7V to +5.25V. Normal power

•

DNL +0.5/-0.25 LSB (typ)

consumption using a +3.6V or +5.25V supply is 1.7

•

INL +0.45/-0.40 LSB (typ)

mW and 8.7 mW, respectively. The power-down

•

SNR 72.0 dB (typ)

feature reduces the power consumption to as low as

2.6 µW using a +5.25V supply.

•

Power Consumption

The ADC121S051 is packaged in 6-lead WSON and

–

3.6V Supply 1.7 mW (typ)

SOT-23 packages. Operation over the industrial

–

5.25V Supply 8.7 mW (typ)

temperature range of

−40°C to +85°C is ensured.

Resolution

Specified for Sample Rate Range of:

50 to 200 ksps

200 to 500 ksps

500 ksps to 1 Msps

12-bit

ADC121S021

ADC121S051

ADC121S101

10-bit

ADC101S021

ADC101S051

ADC101S101

8-bit

ADC081S021

ADC081S051

ADC081S101

(1)

All devices are fully pin and function compatible.

Connection Diagram

Figure 1. 6-Lead SOT-23 or WSON

See DBV or NGF Package

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2014, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.