National Semiconductor - ADC124S021 4 Channel, 50ksps to 200ksps, 12-Bit AD Converter Owner's Manual
Summary
This low-power, four-channel 12-bit ADC converts analog signals into high-speed digital data across a sample rate range of 50 ksps to 200 ksps. Designed for applications in portable systems, remote data acquisition, and control instrumentation, it operates on a stable single supply (2.7V to 5.25V). The manual provides comprehensive details on its high-speed serial interface compatibility (SPI/QSPI), meticulous specifications like INL and DNL, power consumption features, and full operational characteristics for reliable integration into complex systems.
Page 1 Text Content
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August 4, 2008
ADC124S021 4 Channel, 50 ksps to 200 ksps, 12-Bit A/D Converter General Description Features The ADC124S021 is a low-power, four-channel CMOS 12-bit Specified over a range of sample rates. analog-to-digital converter with a high-speed serial interface.
Four input channels
Unlike the conventional practice of specifying performance at
Variable power management
a single sample rate only, the ADC124S021 is fully specified
Single power supply with 2.7V - 5.25V range
over a sample rate range of 50 ksps to 200 ksps. The con- verter is based on a successive-approximation register archi-
tecture with an internal track-and-hold circuit. It can be Key Specifications
configured to accept up to four input signals at inputs IN1
DNL +0.4 / −0.2 LSB (typ)
through IN4.
INL ± 0.35 LSB (typ)
The output serial data is straight binary, and is compatible with
SNR 72.0 d B (typ)
several standards, such as SPI™, QSPI™, MICROWIRE,
Power Consumption
and many common DSP serial interfaces.
3V Supply 2.2 m W (typ)
The ADC124S021 operates with a single supply that can
5V Supply 7.9 m W (typ)
range from +2.7V to +5.25V. Normal power consumption us- ing a +3V or +5V supply is 2.2 m W and 7.9 m W, respectively.
Applications
The power-down feature reduces the power consumption to just 0.14 µW using a +3V supply, or 0.32 µW using a +5V Portable Systems supply.
Remote Data Acquisition
The ADC124S021 is packaged in a 10-lead MSOP package.
Instrumentation and Control Systems
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:
50 to 200 ksps 200 to 500 ksps 500 ksps to 1 Msps 12-bit ADC124S021 ADC124S051 ADC124S101 10-bit ADC104S021 ADC104S051 ADC104S101 8-bit ADC084S021 ADC084S051 ADC084S101
Connection Diagram
TRI-STATE® is a trademark of National Semiconductor Corporation QSPI™ and SPI™ are trademarks of Motorola, Inc.
© 2008 National Semiconductor Corporation www.national.com
Page Summary Contents For National Semiconductor - ADC124S021 4 Channel, 50ksps to 200ksps, 12-Bit AD Converter Owner's Manual
Manual Details
| Brand | National |
|---|---|
| Pages | 20 |
| File Size | 429.83 KB |
| Published | June 18, 2026 |
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Frequently Asked Questions
What is the operating voltage range for the ADC124S021?
It operates with a single supply ranging from +2.7V to +5.25V.
How much power does the device consume at 3V and 5V supplies?
The normal power consumption is 2.2 mW using a +3V supply, and 7.9 mW using a +5V supply.
What are the supported programming/serial interfaces for data output?
It is compatible with several standards, including SPI™, QSPI™, MICROWIRE, and many common DSP serial interfaces.
Can this device be used in industrial temperature environments?
Yes, operation over the industrial range of −40°C to +85°C is guaranteed.