Texas Instruments ADS8372IBRHPR

Overview

ADS8372IBRHPR from Texas Instruments is a 16-bit, 600-kHz fully differential pseudo-bipolar input SAR analog-to-digital converter with integrated 4.096-V reference, onboard reference buffer, and high-speed serial interface (up to 40 MHz). It delivers ±0.75 LSB max INL, ±0.5 LSB max DNL, and 93.5 dB SINAD at 1 kHz - enabling precision data acquisition in medical instruments and optical networking systems.

For engineers reviewing the ADS8372IBRHPR datasheet, ADS8372IBRHPR pinout, ADS8372IBRHPR application, or ADS8372IBRHPR equivalent, key selection criteria include its pseudo-bipolar ±4.2 V input range, zero-latency operation, 28-pin 6 × 6 QFN package, and compatibility with industrial temperature range (–40°C to +85°C) designs requiring stable DC accuracy and low power consumption (110 mW at full rate, 15 mW in nap mode).

Technical Context

The ADS8372IBRHPR implements a capacitor-based SAR architecture with inherent sample-and-hold, supporting fully differential pseudo-bipolar inputs up to ±4.2 V referenced to an internal 4.096-V source. Its conversion control uses CONVST qualified by CS, with BUSY indicating active conversion and zero-latency read capability via SDO.

Timing is governed by quiet zones (tquiet1–tquiet3) around CONVST_QUAL and BUSY edges to preserve AC performance; it supports SPI-compatible serial readout with FS high (CS-controlled frame) or FS low (FS-controlled frame), and offers three operational states: normal, nap (3 mA), and power-down (2 µA).

Key Specifications

Pinout & Package

ADS8372IBRHPR is housed in a 28-pin 6 × 6 mm QFN package with exposed thermal pad (RHP designation). The package requires soldering the thermal pad to the PCB ground plane for thermal and mechanical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision SAR ADC applications.

Compared with ADS8371IRHPR, ADS8372IBRHPR saves two components (reference IC + buffer) and reduces layout sensitivity; versus ADS8382IRHPR, it trades 2 bits of resolution for tighter INL, lower power, and guaranteed DC accuracy - making it optimal for calibrated sensor systems.

Availability

ADS8372IBRHPR is available at Aetrix Electronics and suitable for medical instrumentation, optical networking, transducer interface, and magnetometer readout applications requiring stable component supply, long-term manufacturability, and guaranteed industrial temperature grade performance.

Supply support for ADS8372IBRHPR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The ADS8372IBRHPR belongs to TI's high-speed SAR ADC family designed for precision data acquisition systems demanding low power, integrated references, and robust serial interfacing in space- and power-constrained environments.

FAQ

What is the maximum sample rate supported by the ADS8372IBRHPR?

The ADS8372IBRHPR supports a maximum sample rate of 600 kHz, corresponding to a minimum conversion time of 1.0 µs and acquisition time of 0.5 µs in normal mode. This rate is achievable across the full industrial temperature range (–40°C to +85°C) with specified AC performance including 93.5 dB SINAD at 1 kHz input.

Does the ADS8372IBRHPR require an external reference voltage?

No, the ADS8372IBRHPR includes an onboard 4.096-V reference with ±25 ppm/°C drift and 10 µA source capability. It can operate using this internal reference (REFOUT shorted to REFIN), eliminating external reference components. An external reference (2.5–4.2 V) may be used via REFIN if higher precision or different voltage is required.

How does the nap mode function in the ADS8372IBRHPR?

In nap mode, the ADS8372IBRHPR reduces supply current to 3 mA while retaining reference and logic state, enabling rapid resumption (<300 ns wake-up) without full re-initialization. Nap mode is entered automatically when CONVST_QUAL is low at end-of-conversion, extending acquisition time to 0.8 µs but cutting average power significantly versus continuous sampling.

What are the quiet zone requirements for maintaining ADS8372IBRHPR AC performance?

The ADS8372IBRHPR defines three quiet zones: tquiet1 (30 ns before CONVST_QUAL fall), tquiet2 (10 ns after CONVST_QUAL fall), and tquiet3 (600 ns before BUSY fall). During these intervals, all interface signals (SCLK, CS, FS) must remain stable to prevent digital switching noise from degrading SINAD or SFDR performance.

Is the ADS8372IBRHPR pin-compatible with other devices in the ADS83xx family?

Yes, the ADS8372IBRHPR is pin-compatible with the ADS8382 (18-bit variant) in the same 28-pin RHP package. This allows hardware reuse across resolution tiers. However, it is not pin-compatible with ADS8371 (no internal reference) or ADS8370 (lower speed), as their pin functions differ in reference and control signal assignments.