May 2005
ADC104S021
4 Channel, 200 kSPS, 10-Bit A/D Converter
General Description
Features
n Specified over a range of sample rates.
n Four input channels
The ADC104S021 is a low-power, four-channel CMOS 10-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 ADC104S021 is fully speci-
fied over a sample rate range of 50 kSPS to 200 kSPS. The
converter is based on a successive-approximation register
architecture with an internal track-and-hold circuit. It can be
configured to accept up to four input signals at inputs IN1
through IN4.
n Variable power management
n Single power supply with 2.7V - 5.25V range
Key Specifications
n DNL
n INL
n SNR
0.13 LSB (typ)
0.13 LSB (typ)
61.8 dB (typ)
The output serial data is straight binary, and is compatible
n Power Consumption
— 3V Supply
— 5V Supply
™
™
with several standards, such as SPI , QSPI , MICROW-
IRE, and many common DSP serial interfaces.
1.94 mW (typ)
6.9 mW (typ)
The ADC104S021 operates with a single supply, that can
range from +2.7V to +5.25V. Normal power consumption
using a +3V or +5V supply is 1.94 mW and 6.9 mW, respec-
tively. The power-down feature reduces the power consump-
tion to just 0.12 µW using a +3V supply, or 0.47 µW using a
+5V supply.
Applications
n Portable Systems
n Remote Data Acquisition
n Instrumentation and Control Systems
The ADC104S021 is packaged in a 10-lead MSOP package.
Operation over the industrial temperature range of −40˚C to
+85˚C is guaranteed.
Pin-Compatible Alternatives by Resolution and Speed
All devices are fully pin and function compatible.
Resolution
Specified for Sample Rate Range of:
200 to 500 kSPS
50 to 200 kSPS
ADC124S021
ADC104S021
ADC084S021
500 kSPS to 1 MSPS
12-bit
10-bit
8-bit
ADC124S051
ADC124S101
ADC104S101
ADC084S101
ADC104S051
ADC084S051
Connection Diagram
20124405
TRI-STATE® is a trademark of National Semiconductor Corporation
™
™
QSPI and SPI are trademarks of Motorola, Inc.
© 2005 National Semiconductor Corporation
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