ADC12H034CIMSAX/NOPB

Analog To Digital Converters (ADC) Overview

The ADC12H034CIMSAX/NOPB is a self-calibrating 12-bit plus sign successive approximation analog-to-digital converter (ADC) manufactured by Texas Instruments. It features an integrated multiplexer with four differential or single-ended channels and a sample/hold function. The device operates on a single +5V supply, consuming a maximum of 33 mW in active mode and 100 μW in power-down mode. It utilizes a MICROWIRE-compatible serial I/O interface for data exchange. Key electrical specifications include a maximum conversion time of 5.5 μs at an 8 MHz clock frequency, an integral linearity error of ±1 LSB after auto-calibration, and an operating temperature range from -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Self-Calibrating Architecture: Automatically adjusts linearity, zero, and full-scale errors to less than ±1 LSB without external adjustment components.
• Integrated Multiplexer: Supports four differential or single-ended input channels with configurable acquisition times and variable resolution modes.
• Serial Interface: Compatible with NSC MICROWIRE protocol, allowing flexible digital output word length and format configuration.
• Low Power Consumption: Maximum power dissipation of 33 mW during operation, reducing to 100 μW typical in power-down mode.

Analog To Digital Converters (ADC) Applications

• Medical Instruments
• Process Control Systems
• Test Equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify component availability as the ADC12H034 family may be obsolete or subject to lifetime buy status. Confirm package integrity upon receipt, as the device contains limited built-in ESD protection. Ensure separate bypass capacitors are used for VA+ and VD+ pins to maintain specified performance limits. Check datasheet revisions for any updates regarding critical application disclaimers.

Analog To Digital Converters (ADC) Selection Notes

Select this model for applications requiring high accuracy with minimal external calibration overhead. The ADC12H034 family supports higher clock frequencies (up to 8 MHz) compared to the ADC12030 family (5 MHz), enabling faster throughput. Ensure the analog input voltage does not exceed VA+ or go below GND by more than 50 mV to prevent diode forward biasing and conversion errors. Verify that the reference voltage source impedance remains below 25 Ω for optimal accuracy.

Analog To Digital Converters (ADC) Part Context

This component belongs to the ADC12(H)03x family of self-calibrating 12-bit plus sign serial I/O A/D converters. The 'H' designation indicates support for higher clock speeds (8 MHz) compared to the standard '0' series (5 MHz). The 'C' suffix denotes commercial temperature range (-40°C to +85°C), while 'IMSA' specifies the 20-pin wide body SOIC package. The '/NOPB' suffix indicates lead-free packaging compliant with RoHS standards.

Analog To Digital Converters (ADC) Replacement Considerations

Direct pin-compatible replacements within the same family include ADC12H030CIMSA/NOPB (2-channel), ADC12H032CIMSA/NOPB (2-channel), and ADC12H038CIMSA/NOPB (8-channel). Note that the ADC1203x series offers similar functionality but is limited to a 5 MHz clock speed. Verify package dimensions and thermal resistance values when substituting between different package types within the family.