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CS

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SDATA

SCLK

ADC121S021

ADC121S021

www.ti.com

SNAS305H – JULY 2005 – REVISED MARCH 2013

ADC121S021 Single Channel, 50 to 200 ksps, 12-Bit A/D Converter

Check for Samples: ADC121S021

1

FEATURES

DESCRIPTION

The ADC121S021 is a low-power, single channel

23

•

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 ADC121S021 is fully specified over a

•

Single Power Supply with 2.7V - 5.25V Range

sample rate range of 50 ksps to 200 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 ADC121S021 operates with a single supply that

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

•

DNL +0.45 / -0.25 LSB (typ)

consumption using a +3.6V or +5.25V supply is 1.5

•

INL +0.45 / -0.4 LSB (typ)

mW and 7.9 mW, respectively. The power-down

•

SNR 72.3 dB (typ)

feature reduces the power consumption to as low as

2.6 µW using a +5.25V supply.

•

Power Consumption

The ADC121S021 is packaged in 6-lead WSON and

–

3.6V Supply 1.5 mW (typ)

SOT-23 packages. Operation over the industrial

–

5.25V Supply 7.9 mW (typ)

temperature range of

−40°C to +85°C is ensured.

Specified for Sample Rate Range of:

Resolution

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. WSON or SOT-23 Package

See Package Numbers NGF0006A, DBV0006A

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

TRI-STATE is a registered trademark of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2013, 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.