Texas Instruments ADS7263SRHBT

Overview

ADS7263SRHBT from Texas Instruments is a dual, 14-bit, 1-MSPS simultaneous-sampling SAR ADC with four fully-differential or eight pseudo-differential inputs, 85 dB SNR, –92 dB THD, and operation over –40°C to +125°C. It supports dual programmable 2.5-V references and integrated FIFO for oversampling in motor current sensing.

For engineers reviewing the ADS7263SRHBT datasheet, ADS7263SRHBT pinout, ADS7263SRHBT application, or ADS7263SRHBT equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial use cases, and two technically documented alternative parts for safety-critical analog acquisition systems.

Technical Context

The ADS7263SRHBT implements two independent SAR cores with synchronized CONVST-triggered sampling across two channel pairs (A and B), enabling true simultaneous acquisition of current and voltage signals in three-phase power stages. Its dual reference outputs (REFIO1/REFIO2) support independent input range scaling per ADC channel pair.

It features a programmable auto-sequencer, on-chip data storage (up to 4 samples per channel), and a 2-bit counter for functional safety monitoring. The serial interface operates in half-clock or full-clock mode with CS/RD-controlled SDOA/SDOB outputs and SDI register programming.

Key Specifications

Pinout & Package

ADS7263SRHBT is housed in a 32-pin VQFN package (RHB) with exposed thermal pad. Pin numbering follows top-view layout; AGND (pins 12, 30), AVDD (13, 29), DGND (28), and DVDD (27) require dedicated low-impedance plane connections. REFIO1 (pin 9) and REFIO2 (pin 10) each require a 22-μF ceramic capacitor to RGND (pin 11).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8363IRHBT and ADS7223SRHBT, the ADS7263SRHBT delivers optimal balance of 14-bit precision, 1-MSPS simultaneous sampling, and extended temperature operation - making it the preferred choice for industrial motor drives requiring SIL-2 compliance without over-engineering.

Availability

ADS7263SRHBT is available at Aetrix Electronics and suitable for motor control, power quality monitoring, and protection relay applications requiring stable component supply across automotive and industrial product lifecycles.

Supply support for ADS7263SRHBT 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 interface solutions.

The ADSxxx3 family-including ADS7263SRHBT-is designed specifically for high-reliability simultaneous-sampling applications in motor drives, grid infrastructure, and functional safety systems operating from –40°C to +125°C.

FAQ

What is the maximum clock frequency supported by ADS7263SRHBT in full-clock mode?

The ADS7263SRHBT supports up to 40 MHz CLOCK frequency in full-clock mode, enabling minimum conversion time of 35 clock cycles (875 ns) and sustained 1-MSPS throughput per ADC channel. This timing is validated across –40°C to +125°C with AVDD = 5 V and DVDD = 3.3 V per the SBAS523D datasheet Section 7.9.

Does ADS7263SRHBT support fully-differential input mode on both ADCs simultaneously?

Yes, ADS7263SRHBT supports fully-differential mode on both ADCs simultaneously-using CHA0P/CHA0N and CHA1P/CHA1N for Channel A, and CHB0P/CHB0N and CHB1P/CHB1N for Channel B. This configuration requires M0 = 0 and M1 = 0, and is explicitly defined in Table 5 and Figure 1 of the SBAS523D datasheet.

How is the 2-bit safety counter in ADS7263SRHBT used for functional safety compliance?

The 2-bit safety counter in ADS7263SRHBT increments with each valid conversion and resets on CS assertion. It is monitored via SDI register reads to detect missing or duplicated conversions-providing diagnostic coverage for systematic faults in SIL-2–compliant protection relays per IEC 61508 Annex D. This feature is documented in Section 8.3.7 of SBAS523D.

Can ADS7263SRHBT operate with different reference voltages on REFIO1 and REFIO2?

Yes, ADS7263SRHBT allows independent programming of REFIO1 and REFIO2 via internal 10-bit DACs, enabling distinct 2.5-V reference levels (e.g., 2.495 V and 2.505 V) for differential gain calibration between ADC A and B. Each output maintains ±10 ppm/°C drift and supports ±2 mA load per SBAS523D Section 7.5.

What is the purpose of the CMA and CMB pins on ADS7263SRHBT?

CMA and CMB serve as common-mode voltage inputs for pseudo-differential mode operation-CMA sets the common-mode level for all Channel A inputs (CHA0P/CHA0N through CHA1P/CHA1N), and CMB does the same for Channel B. They are unused in fully-differential mode and must be tied to AVDD/2 or left floating only if not configured, as specified in Pin Functions Table (Section 6) of SBAS523D.