ADC082S101
2 Channel, 1 MSPS, 8-Bit A/D Converter
General Description
The ADC082S101 is a low-power, two-channel CMOS 8-bit
analog-to-digital converter with a high-speed serial interface.
Unlike the conventional practice of specifying performance
at a single sample rate only, the ADC082S101 is fully speci-
fied over a sample rate range of 500 kSPS to 1 MSPS. The
converter is based on a successive-approximation register
architecture with an internal track-and-hold circuit. It can be
configured to accept one or two input signals at inputs IN1
and IN2.
The output serial data is straight binary, and is compatible
with several standards, such as SPI™, QSPI™, MICROW-
IRE, and many common DSP serial interfaces.
The ADC082S101 operates with a single supply that can
range from +2.7V to +5.25V. Normal power consumption
using a +3V or +5V supply is 3.2 mW and 9.6 mW, respec-
tively. The power-down feature reduces the power consump-
tion to just 0.12 µW using a +3V supply, or 0.35 µW using a
+5V supply.
The ADC082S101 is packaged in an 8-lead MSOP package.
Operation over the industrial temperature range of −40˚C to
+85˚C is guaranteed.
Features
n Specified over a range of sample rates.
n Two input channels
n Variable power management
n Single power supply with 2.7V - 5.25V range
Key Specifications
n DNL ±0.10 LSB (typ)
n INL ± 0.13 LSB (typ)
n SNR 49.6 dB (typ)
n Power Consumption
— 3V Supply 3.2 mW (typ)
— 5V Supply 9.6 mW (typ)
Applications
n Portable Systems
n Remote Data Aquisitions
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 ADC122S021 ADC122S051 ADC122S101
10-bit ADC102S021 ADC102S051 ADC102S101
8-bit ADC082S021 ADC082S051 ADC082S101
Connection Diagram
20125405
Ordering Information
Order Code Temperature Range Description Top Mark
ADC082S101CIMM −40˚C to +85˚C 8-Lead MSOP Package X22C
ADC082S101CIMMX −40˚C to +85˚C 8-Lead MSOP Package, Tape & Reel X22C
ADC082S101EVAL Evaluation Board
TRI-STATE
®
is a trademark of National Semiconductor Corporation
QSPI™ and SPI™ are trademarks of Motorola, Inc.
April 2005
ADC082S101
2
Channel,
1
MSPS,
8-Bit
A/D
Converter
© 2005 National Semiconductor Corporation DS201254 www.national.com