NATIONAL SEMICONDUCTOR ADC122S051 User's Guide and Specifications
Summary
The ADC122S051 is a low-power, high-speed 12-bit Analog-to-Digital Converter ideal for critical data acquisition systems. Designed with two input channels, it supports variable sample rates from 200 kSPS to 500 kSPS using a single supply voltage (2.7V–5.25V). This product is essential for engineers developing instrumentation, remote monitoring, and industrial control systems requiring accurate, reliable analog signal conversion across wide temperature ranges (-40°C to +85°C). The manual provides detailed specifications on electrical characteristics, power management, serial interface compatibility, and optimal application integration.
Manual Details
| Brand | National |
|---|---|
| Pages | 19 |
| File Size | 930.46 KB |
| Published | July 16, 2026 |
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Frequently Asked Questions
What voltage range can I use for the positive supply?
The ADC122S051 operates with a single supply that can range from +2.7V to +5.25V.
How do I ensure proper power grounding and stability?
Connect VDD to a quiet source and bypass it using a 1µF/0.1µF capacitor located close to the power pin.
What are the operational limits for temperature?
Operation is guaranteed over the industrial temperature range, which spans from -40°C to +85°C.
What are the typical power consumption figures?
Normal operation uses about 3.0 mW at a +3V supply and approximately 10 mW at a +5V supply.
Does this converter support multiple input signals?
Yes, it is a two-channel device, allowing reception of signals on both IN1 and IN2.