Texas Instruments ADS7863IRGER

Overview

ADS7863IRGER from Texas Instruments is a dual, 12-bit, 2MSPS simultaneous-sampling analog-to-digital converter with four fully differential or six pseudo-differential inputs, internal 2.5V reference, serial interface, and operation from –40°C to +125°C. It delivers 71dB SNR, –81dB THD, and 72dB CMRR at 100kHz for high-precision motor control feedback loops.

For engineers reviewing the ADS7863IRGER datasheet, ADS7863IRGER pinout, ADS7863IRGER application, or ADS7863IRGER equivalent, this page provides verified specifications, QFN-24 package details, simultaneous dual-conversion timing, programmable REFOUT voltage, and real-world use cases in multi-axis positioning and three-phase power control systems.

Technical Context

The ADS7863IRGER implements two independent SAR ADCs sharing a common clock and control logic, enabling true simultaneous sampling of two analog channels. Each ADC features a 2:1 or 3:1 input multiplexer with fully differential front-end architecture and 2pF sampling capacitors.

Its internal 10-bit DAC drives a buffered 2.5V reference output (REFOUT), adjustable in 2.44mV steps via serial interface. Conversion timing is synchronized to an external 1–32MHz CLOCK signal, with 406.25ns conversion time and 62.5ns acquisition time at 32MHz.

Key Specifications

Pinout & Package

ADS7863IRGER is housed in a 4×4mm QFN-24 package (RGE) with exposed thermal pad, optimized for low-inductance analog grounding and thermal performance in high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, high-speed ADC applications.

Compared with ADS7861IDBQ, ADS7863IRGER adds programmable reference and multiplexer control at identical speed; versus ADS8361IRGET, it trades 4 bits of resolution for 2× sampling rate and lower power, making it optimal for real-time control loops where timing determinism outweighs static accuracy.

Availability

ADS7863IRGER is available at Aetrix Electronics and suitable for motor control, multi-axis positioning systems, and three-phase power control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADS7863IRGER includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade IC design.

The ADS7863IRGER belongs to TI's high-speed precision ADC product line, engineered specifically for demanding real-time control applications in motor drives, power inverters, and automated test equipment where simultaneous sampling and robust noise immunity are critical.

FAQ

What is the maximum clock frequency supported by the ADS7863IRGER?

The ADS7863IRGER supports an external CLOCK input from 1MHz to 32MHz. At 32MHz, it achieves its rated 2MSPS simultaneous sampling rate with 406.25ns conversion time and 62.5ns acquisition time. Operation outside this range violates timing specifications and may cause data corruption or increased INL/DNL error in the ADS7863IRGER.

Does the ADS7863IRGER require an external reference voltage?

No, the ADS7863IRGER integrates a 2.5V internal reference with programmable output via a 10-bit DAC. It can operate using only the internal reference on REFIN, or accept an external 0.5–2.525V reference. The REFOUT pin delivers the selected reference voltage with ±10ppm/°C drift, eliminating the need for external reference ICs in most ADS7863IRGER deployments.

How does the ADS7863IRGER handle simultaneous sampling of two channels?

The ADS7863IRGER uses two independent SAR ADC cores with separate sample-and-hold amplifiers, both triggered by the same CONVST rising edge. This architecture ensures true simultaneous sampling-no inter-channel skew-with BUSY going high for both converters concurrently. The dual SDOA/SDOB outputs deliver converted data synchronously on the falling edge of CLOCK, preserving temporal alignment in the ADS7863IRGER.

What are the power-down modes available on the ADS7863IRGER?

The ADS7863IRGER offers NAP (Normal Active Power-down) and deep power-down modes. In NAP mode, analog supply current drops to 1.4mA (AVDD = 5V); in deep power-down, it falls to 1µA. Both modes retain register settings and reference state. These features reduce power consumption during idle periods in battery-powered condition monitoring systems using the ADS7863IRGER.

Can the ADS7863IRGER be used with pseudo-differential inputs?

Yes, the ADS7863IRGER supports pseudo-differential operation via its M0/M1-controlled multiplexer. In 3:1 pseudo-differential mode, CHx0– serves as a common-mode reference while CHx0+, CHx1–, and CHx1+ act as single-ended inputs referenced to it. This configuration enables three-input acquisition per ADC using only two differential pins, increasing channel density in space-constrained ADS7863IRGER applications.