ADC121S101_06 Datasheet, PDF (1/17 Pages) National Semiconductor (TI) – Single Channel, 0.5 to Msps, 12-Bit A/D Converter

April 2006
ADC121S101
Single Channel, 0.5 to 1 Msps, 12-Bit A/D Converter
General Description
The ADC121S101 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 ADC121S101 is
fully specified over a sample rate range of 500 ksps to
1 Msps. 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 ADC121S101 operates with a single supply that can
range from +2.7V to +5.25V. Normal power consumption
using a +3V or +5V supply is 2.0 mW and 10 mW, respec-
tively. The power-down feature reduces the power consump-
tion to as low as 2.6 µW using a +5V supply.
The ADC121S101 is packaged in 6-lead LLP and SOT-23
packages. Operation over the industrial temperature range
of −40˚C to +125 ˚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
— 3V Supply
— 5V Supply
+0.5 / −0.3 LSB (typ)
±0.40 LSB (typ)
72.5 dB (typ)
2.0 mW (typ)
10 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
ADC121S101CISD
ADC121S101CISDX
ADC121S101CIMF
ADC121S101CIMF
ADC121S101EVAL
Temperature Range
−40˚C to +125 ˚C
−40˚C to +125 ˚C
−40˚C to +125 ˚C
−40˚C to +125 ˚C
TRI-STATE^® is a trademark of National Semiconductor Corporation
QSPI™ and SPI™ are trademarks of Motorola, Inc.
© 2006 National Semiconductor Corporation DS201450
20145005
Description
6-Lead LLP Package
6-Lead LLP Package, Tape & Reel
6-Lead SOT-23 Package
6-Lead SOT-23 Package, Tape & Reel
Evaluation Board
Top Mark
X1C
X1C
X01C
X01C
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