ADC121S051_06 Datasheet, PDF (1/16 Pages) National Semiconductor (TI) – Single Channel, 200 to 500ksps, 12-Bit A/D Converter

February 2006
ADC121S051
Single Channel, 200 to 500 ksps, 12-Bit A/D Converter
General Description
The ADC121S051 is a low-power, single channel CMOS
12-bit analog-to-digital converter with a high-speed serial
interface. Unlike the conventional practice of specifying per-
formance at a single sample rate only, the ADC121S051 is
fully specified over a sample rate range of 200 ksps to
500 ksps. The converter is based upon a successive-
approximation register architecture with an internal track-
and-hold circuit.
The output serial data is straight binary, and is compatible
with several standards, such as SPI™, QSPI™,
MICROWIRE, and many common DSP serial interfaces.
The ADC121S051 operates with a single supply that can
range from +2.7V to +5.25V. Normal power consumption
using a +3.6V or +5.25V supply is 1.7 mW and 8.7 mW,
respectively. The power-down feature reduces the power
consumption to as low as 2.6 µW using a +5.25V supply.
The ADC121S051 is packaged in 6-lead LLP and SOT-23
packages. Operation over the industrial temperature range
of −40˚C to +85˚C is guaranteed.
Features
n Specified over a range of sample rates.
n 6-lead LLP and SOT-23 packages
n Variable power management
n Single power supply with 2.7V - 5.25V range
n SPI™/QSPI™/MICROWIRE/DSP compatible
Key Specifications
n DNL
n INL
n SNR
n Power Consumption
— 3.6V Supply
— 5.25V Supply
+0.5/-0.25 LSB (typ)
+0.45/-0.40 LSB (typ)
72.0 dB (typ)
1.7 mW (typ)
8.7 mW (typ)
Applications
n Portable Systems
n Remote Data Acquisition
n Instrumentation and Control Systems
Pin-Compatible Alternatives by Resolution and Speed
All devices are fully pin and function compatible.
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
Connection Diagram
Ordering Information
Order Code
ADC121S051CISD
ADC121S051CISDX
ADC121S051CIMF
ADC121S051CIMFX
ADC121S051EVAL
Temperature Range
−40˚C to +85˚C
−40˚C to +85˚C
−40˚C to +85˚C
−40˚C to +85˚C
TRI-STATE^® is a trademark of National Semiconductor Corporation
QSPI™ and SPI™ are trademarks of Motorola, Inc.
© 2006 National Semiconductor Corporation DS201446
20144605
Description
6-Lead LLP Package
6-Lead LLP Package, Tape and Reel
6-Lead SOT-23 Package
6-Lead SOT-23 Package, Tape & Reel
SOT-23 Evaluation Board
Top Mark
X4C
X4C
X13C
X13C
www.national.com