Texas Instruments ADS8363SRHBT

Overview

ADS8363SRHBT from Texas Instruments is a dual, 16-bit, 1-MSPS successive-approximation register (SAR) analog-to-digital converter with eight pseudo-differential or four fully-differential input channels, simultaneous sampling capability, 93-dB SNR, –98-dB THD, and operation across –40°C to +125°C for motor current and position measurement in safety-critical industrial drives.

For engineers reviewing the ADS8363SRHBT datasheet, ADS8363SRHBT pinout, ADS8363SRHBT application, or ADS8363SRHBT equivalent, key selection criteria include simultaneous dual-channel acquisition timing, dual buffered 2.5-V reference outputs for independent input range scaling, integrated FIFO and auto-sequencer for oversampling, and VQFN-32 package compatibility with high-density PCB layouts.

Technical Context

The ADS8363SRHBT implements two independent SAR ADC cores sharing a common clock domain, enabling true simultaneous sampling of two analog inputs with <50-ps inter-ADC aperture mismatch. Its input multiplexer supports both pseudo-differential (up to 4 channels per ADC) and fully-differential (2 channels per ADC) configurations, with dedicated CMA/CMB common-mode inputs for pseudo-differential mode.

Internal dual 10-bit string DACs generate programmable 2.5-V reference outputs (REFIO1/REFIO2), each capable of setting distinct full-scale ranges or implementing two-level PGA functionality. The serial interface supports half-clock and full-clock modes, with BUSY, RD, CS, SDI, SDOA, and SDOB pins enabling flexible SPI-compatible readout and configuration.

Key Specifications

Pinout & Package

ADS8363SRHBT is housed in a 5.0 mm × 5.0 mm, 32-pin VQFN (RHB) package with exposed thermal pad, optimized for thermal dissipation in high-reliability motor control modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7263SRHBT and AD7606C-16BSTZ, the ADS8363SRHBT uniquely delivers true simultaneous dual-channel sampling with 16-bit fidelity and dual programmable references-making it irreplaceable in safety-critical motor control and power quality instrumentation requiring phase-coherent measurements.

Availability

ADS8363SRHBT is available at Aetrix Electronics and suitable for motor control systems, power quality analyzers, three-phase inverters, and protection relays requiring stable component supply across extended temperature and long product lifecycles.

Supply support for ADS8363SRHBT 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 ADS8363SRHBT belongs to TI's high-precision, simultaneous-sampling SAR ADC product line, designed specifically for real-time current/voltage acquisition in motor drives, energy metering, and functional safety–certified protection systems.

FAQ

What is the maximum clock frequency supported by the ADS8363SRHBT in full-clock mode?

The ADS8363SRHBT supports a maximum clock frequency of 40 MHz in full-clock mode, enabling 1-MSPS throughput with 35 clock cycles per conversion. This timing is validated across –40°C to +125°C and requires proper layout decoupling on AVDD/DVDD rails to maintain jitter below 50 ps.

Does the ADS8363SRHBT support fully-differential input mode on all channels?

Yes, the ADS8363SRHBT supports fully-differential mode for up to two inputs per ADC (2×2 configuration), using CHA0P/CHA0N and CHA1P/CHA1N for ADC A, and CHB0P/CHB0N and CHB1P/CHB1N for ADC B. Mode selection is controlled by M0/M1 pins per Table 5 in the datasheet.

How does the dual reference architecture of the ADS8363SRHBT improve system design?

The ADS8363SRHBT's dual 2.5-V buffered references (REFIO1/REFIO2) allow independent full-scale range programming-for example, scaling shunt current sensing to ±250 mV while setting bus voltage to ±5 V. This eliminates external PGA stages, reduces component count, and maintains channel-to-channel isolation in safety-critical designs.

Is the ADS8363SRHBT pin-compatible with the ADS7263SRHBT or ADS7223SRHBT?

Yes, the ADS8363SRHBT is pin-compatible with ADS7263SRHBT and ADS7223SRHBT in the same RHB (32-pin VQFN) package. All share identical pin functions, thermal pad layout, and recommended PCB footprint-enabling resolution-flexible design reuse across 12-/14-/16-bit variants without board revision.

What is the purpose of the 2-bit safety counter in the ADS8363SRHBT?

The ADS8363SRHBT's hardware 2-bit safety counter increments on every CONVST rising edge and resets on RD assertion. It provides a deterministic, cycle-accurate audit trail for conversion sequencing-used in SIL-3 functional safety architectures to detect missing or duplicated conversions during runtime diagnostics.