Texas Instruments ADS8370IBRHPT

Overview

ADS8370IBRHPT from Texas Instruments is a 16-bit, 600-kHz pseudo-differential 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 ±1.25 LSB max INL, ±0.75 LSB max DNL, 89.5 dB SINAD, and operates from –40°C to +85°C in industrial data acquisition systems.

For engineers reviewing the ADS8370IBRHPT datasheet, ADS8370IBRHPT pinout, ADS8370IBRHPT application, or ADS8370IBRHPT equivalent, key selection considerations include its pseudo-differential input range (0 V to 4.2 V), zero-latency operation, selectable 2's complement/straight binary output format, and low-power nap mode (3 mA) and power-down mode (2 µA).

Technical Context

The ADS8370IBRHPT employs a capacitor-based SAR architecture with inherent sample-and-hold, enabling true zero-latency conversion. Its conversion control uses CONVST qualified by CS, with BUSY signaling active conversion periods and quiet zones (tquiet1–tquiet3) required for optimal INL/SINAD performance.

Digital interface supports SPI-compatible timing with frame sync (FS) and serial clock (SCLK) up to 40 MHz. The device features dual supply domains (+VA for analog, +VBD for digital), separate AGND/BDGND planes, and internal reference output (REFOUT) buffered from REFIN/REFM.

Key Specifications

Pinout & Package

ADS8370IBRHPT is housed in a 28-pin, 6 × 6 mm QFN package (RHP) with exposed thermal pad requiring PCB soldering 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 ADS8370IBRHPT, ADS8371IBRHPT adds differential input flexibility at the expense of reference integration, while ADS8380IRHPT trades guaranteed 16-bit accuracy for extended resolution - both require redesign of reference and analog front-end circuits.

Availability

ADS8370IBRHPT is available at Aetrix Electronics and suitable for medical instrumentation, optical networking monitoring, and transducer interface applications requiring stable component supply, long-term lifecycle support, and industrial temperature-grade performance.

Supply support for ADS8370IBRHPT 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 ADS8370IBRHPT belongs to TI's high-speed SAR ADC family targeting high-accuracy, low-power data acquisition in medical, test equipment, and industrial sensing applications - designed for minimal external component count and robust operation across harsh environments.

FAQ

What is the absolute input voltage range for ADS8370IBRHPT?

The ADS8370IBRHPT supports pseudo-differential analog inputs where +IN accepts –0.2 V to VREF + 0.2 V and –IN accepts –0.2 V to +0.2 V, referenced to AGND. With the internal 4.096-V reference, this yields a usable input span of 0 V to 4.2 V. Exceeding these limits risks damage or specification violation per Absolute Maximum Ratings.

Does ADS8370IBRHPT support external reference operation?

Yes, ADS8370IBRHPT supports external reference operation via the REFIN pin (2.5 V to 4.2 V range). When using an external reference, REFOUT must be left unconnected and REFIN decoupled with 0.1-µF and 1-µF capacitors to REFM. Internal reference is disabled automatically when external voltage is applied.

How does the nap mode reduce power consumption in ADS8370IBRHPT?

ADS8370IBRHPT enters nap mode (3 mA typical) when CONVST_QUAL is low at end-of-conversion, extending acquisition time by 0.3 µs but cutting active current by ~88% versus full-rate operation (25 mA). This mode maintains fast wake-up (<300 ns) and avoids full power-down sequencing delays.

What is the purpose of the SB/2C pin on ADS8370IBRHPT?

The SB/2C pin on ADS8370IBRHPT selects output data format: logic low configures straight binary (0x0000 = 0 V, 0xFFFF = VREF), logic high enables 2's complement (0x8000 = 0 V, 0xFFFF = –VREF/65536, 0x0000 = +VREF/65536). This allows seamless integration with signed arithmetic processors without software format conversion.

Can ADS8370IBRHPT perform back-to-back conversions without delay?

Yes, ADS8370IBRHPT supports true back-to-back conversions: asserting CONVST_QUAL high immediately after BUSY falls initiates the next sampling phase without entering wait state, achieving sustained 600-kHz throughput. This requires precise timing alignment per tquiet1/tquiet2 constraints to maintain specified INL/SINAD.