Texas Instruments ADS7263SRHBR

Overview

ADS7263SRHBR from Texas Instruments is a dual, 14-bit, 1-MSPS simultaneous-sampling SAR analog-to-digital converter with four fully-differential or eight pseudo-differential inputs, 85 dB typical SNR, –92 dB typical THD, and operation over –40°C to +125°C - used in motor current sensing and protection relay signal acquisition.

For engineers reviewing the ADS7263SRHBR datasheet, ADS7263SRHBR pinout, ADS7263SRHBR application, or ADS7263SRHBR equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial use cases, and real alternative part comparisons - all grounded in TI's SBAS523D production data sheet.

Technical Context

The ADS7263SRHBR integrates two independent SAR ADC cores sharing a common clock domain, enabling true simultaneous sampling across two channel pairs (A and B). Its input multiplexer supports both fully-differential (2×2) and pseudo-differential (4×2) configurations, with dedicated CMA/CMB pins for common-mode voltage setting in pseudo-differential mode.

It features dual programmable 2.5-V reference outputs (REFIO1/REFIO2), each with 10-bit DAC resolution and ±10 ppm/°C drift, enabling independent gain scaling per ADC channel. The device includes an integrated FIFO, auto-sequencer, and 2-bit safety counter - all configurable via serial interface (SDI/SDOA/SDOB) under CS and RD control.

Key Specifications

Pinout & Package

ADS7263SRHBR is housed in a 32-pin VQFN (RHB) package with exposed thermal pad. Pin numbering follows top-view orientation; AGND (pins 12, 30), AVDD (13, 29), DGND (28), and DVDD (27) require dedicated decoupling per TI layout guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel simultaneous-sampling ADC applications.

Compared with ADS7263SRHBR, ADS8363SRHBR delivers 2 additional bits of resolution and 8 dB better SNR at higher power, while ADS7223SRHBR trades 2 bits and 12 dB SNR for lower cost and power - all share identical pinout, timing, and software interface.

Availability

ADS7263SRHBR is available at Aetrix Electronics and suitable for motor control, protection relay, and industrial PLC applications requiring stable component supply, long-term manufacturability, and extended temperature support.

Supply support for ADS7263SRHBR 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 company specializing in analog and embedded processing technologies, with leadership in precision data converters and industrial-grade ICs.

The ADSxxx3 family - including ADS7263SRHBR - was designed for high-reliability industrial sensing, targeting simultaneous dual-channel acquisition in motor drives, protection relays, and power quality instrumentation.

FAQ

What is the maximum sampling rate of the ADS7263SRHBR?

The ADS7263SRHBR achieves 1 million samples per second (1 MSPS) per ADC channel. In simultaneous sampling mode, both channels acquire data at this rate with matched timing - supported by either half-clock (0.5–20 MHz) or full-clock (1–40 MHz) modes. Conversion time is 17.5 clock cycles in half-clock mode, enabling deterministic latency for real-time control loops.

Does the ADS7263SRHBR support fully-differential input configuration?

Yes, the ADS7263SRHBR supports fully-differential mode with two independent channel pairs: CHA0P/CHA0N and CHA1P/CHA1N for ADC A, and CHB0P/CHB0N and CHB1P/CHB1N for ADC B. Each pair provides true differential input with 92 dB CMRR, and no external common-mode bias is required - unlike pseudo-differential mode which uses CMA/CMB pins.

How does the dual reference architecture of the ADS7263SRHBR improve system design?

The ADS7263SRHBR's dual 2.5-V reference outputs (REFIO1 and REFIO2) each integrate a 10-bit DAC, allowing independent gain scaling for ADC A and ADC B. This eliminates the need for external programmable gain amplifiers when measuring signals with different full-scale ranges - such as phase current (±500 mV) and DC bus voltage (±50 V) in the same inverter stack.

What safety features does the ADS7263SRHBR include for industrial applications?

The ADS7263SRHBR includes a dedicated 2-bit safety counter that increments with each valid conversion cycle and resets on configuration changes. This feature enables runtime verification of ADC sequencing integrity - a key diagnostic for functional safety standards like IEC 61508 and ISO 13849. It operates independently of host software and requires no external supervision.

Is the ADS7263SRHBR pin-compatible with other devices in the ADSxxx3 family?

Yes, the ADS7263SRHBR shares identical 32-pin VQFN (RHB) packaging, pin assignment, and electrical interface with ADS8363SRHBR and ADS7223SRHBR. All three devices use the same CONVST-triggered timing, SDI/SDOA/SDOB serial protocol, register map, and power supply requirements - enabling drop-in resolution upgrades or downgrades without PCB revision.