ADS7817UBG4

Analog To Digital Converters (ADC) Overview

The ADS7817UBG4 is a 12-bit successive approximation register (SAR) analog-to-digital converter manufactured by Texas Instruments. It features a high-impedance fully differential analog input and operates with a single +5V power supply within the 4.75V to 5.25V range. The device supports a maximum sampling rate of 200kHz and communicates via a synchronous 3-wire serial interface compatible with SPI. It consumes 2.3mW at full speed, with a maximum shutdown current of 3µA. The component is housed in an SOIC-8 package and functions across a temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• 12-Bit Resolution: Provides accurate data conversion with no missing codes.
• Differential Input: Features true differential analog inputs (+In, –In) for improved noise rejection.
• Low Power Consumption: Consumes 2.3mW at 200kHz sampling; draws max 3µA in shutdown mode.
• Flexible Reference: Supports external reference voltages from 100mV to 2.5V.

Analog To Digital Converters (ADC) Applications

• Transducer Interface
• Battery Operated Systems
• Remote Data Acquisition
• Isolated Data Acquisition
• AC Motor Control

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix 'G4' against the manufacturer's current documentation to confirm compliance status and availability. The datasheet indicates that models with slash notations (e.g., /2K5) are available only in tape and reel formats. Confirm the exact packaging type required for the specific part number variant.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a low-power, 12-bit resolution ADC with differential inputs is required. Ensure the system can provide an external reference voltage between 100mV and 2.5V, as the device lacks an internal reference. Verify that the microprocessor interface supports the 3-wire synchronous serial protocol with DCLOCK synchronization.

Analog To Digital Converters (ADC) Part Context

The ADS7817UBG4 belongs to the ADS7817 family of micro-power sampling ADCs. This series includes variants such as ADS7817P (DIP), ADS7817U (SOIC), and ADS7817E (MSOP). The 'UB' designation typically corresponds to the SOIC-8 package with specific linearity grades, while 'G4' denotes environmental compliance attributes defined by the manufacturer.

Analog To Digital Converters (ADC) Replacement Considerations

Direct pin-compatible replacements within the same family include ADS7817UC (SOIC-8, ±1 LSB INL) or ADS7817UB (SOIC-8, ±2 LSB INL). Note that these variants may have different linearity specifications compared to the C-grade devices.