Texas Instruments ADS8380IBRHPT

Overview

ADS8380IBRHPT from Texas Instruments is an 18-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 ±4 LSB max INL, 91 dB SINAD at 1 kHz, and 119 dB SFDR - enabling precision data acquisition in medical instruments and optical networking systems.

For engineers reviewing the ADS838380IBRHPT datasheet, ADS8380IBRHPT pinout, ADS8380IBRHPT application, or ADS8380IBRHPT equivalent, key selection considerations include its 28-pin 6×6 QFN package, 18-bit NMC guarantee over –40°C to +85°C, zero-latency operation, selectable 2's complement/straight binary output format, and micropower nap mode (3 mA) and power-down (2 µA) states.

Technical Context

The ADS8380IBRHPT implements a capacitor-based successive-approximation register (SAR) architecture with inherent sample-and-hold, supporting pseudo-differential input (0 V to 4.2 V) and internal reference buffering. Its conversion control uses qualified CONVST and CS signals, with three defined quiet zones (tquiet1–tquiet3) required to maintain specified AC performance.

Digital interface operates in SPI-compatible mode with frame sync (FS) and serial clock (SCLK) up to 40 MHz, delivering 18-bit MSB-first data on SDO. Power management includes nap mode (3 mA, 300 ns wake-up) and full power-down (2 µA), with internal reference settling time of 4 ms when resuming from power-down with 1-µF||0.1-µF on REFOUT.

Key Specifications

Pinout & Package

ADS8380IBRHPT is housed in a 28-pin, 6 mm × 6 mm, 0.5-mm pitch QFN package (RHP designation) with exposed thermal pad. Pin functions are validated per TI SLAS387A datasheet Figure 1 and Terminal Functions table.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8381IRHPT and ADS8382IRHPT, the ADS8380IBRHPT uniquely guarantees 18-bit no-missing-codes and ±4 LSB INL across –40°C to +85°C, supports higher sample rate than ADS8381, and delivers superior dynamic performance (91 dB SINAD vs ≤89 dB) essential for metrology-grade acquisition.

Availability

ADS8380IBRHPT is available at Aetrix Electronics and suitable for medical instrumentation, optical networking, transducer interface, and magnetometer systems requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature performance.

Supply support for ADS8380IBRHPT 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 high-reliability industrial ICs.

The ADS8380IBRHPT belongs to TI's high-speed SAR ADC family designed for applications demanding 18-bit accuracy, low power, and integrated reference - targeting medical diagnostics, test equipment, and high-end industrial sensing.

FAQ

What is the guaranteed integral nonlinearity (INL) specification for ADS8380IBRHPT over temperature?

The ADS8380IBRHPT guarantees ±4 LSB maximum integral nonlinearity over the full industrial temperature range of –40°C to +85°C, as specified in the SLAS387A datasheet Table 1. This endpoint INL specification ensures consistent absolute accuracy without requiring system-level calibration across operating conditions, distinguishing it from variants like ADS8381 that specify tighter INL only at 25°C.

Does ADS8380IBRHPT require an external reference, or does it include an internal one?

The ADS8380IBRHPT includes an onboard 4.096-V internal voltage reference with 25 ppm/°C drift and 10 µA source capability, eliminating the need for an external reference in most applications. The device also supports external reference operation via the REFIN pin (2.5 V to 4.2 V range), providing design flexibility for systems requiring ultra-low-drift or custom reference voltages.

What power-saving modes does ADS8380IBRHPT support, and what are their current draw values?

The ADS8380IBRHPT supports three power states: active mode (25 mA at 600 kHz), nap mode (3 mA with 300 ns wake-up), and power-down mode (2 µA). Nap mode reduces power during inter-conversion intervals while retaining configuration and reference bias; power-down resets internal logic and disables all outputs, requiring 4 ms for internal reference re-stabilization upon wake-up.

How is the output data format selected on ADS8380IBRHPT?

The output data format of ADS8380IBRHPT is selected using the SB/2C pin: logic low configures straight binary output (0x00000 to 0x3FFFF for 0 V to full scale), while logic high selects 2's complement format (0x20000 to 0x3FFFF for positive, 0x00000 to 0x1FFFF for negative values). This hardware-selectable format avoids firmware overhead for sign handling in bipolar sensor applications.

What package type and pin count does ADS8380IBRHPT use, and are thermal pads supported?

The ADS8380IBRHPT uses a 28-pin, 6 mm × 6 mm QFN package (RHP designation) with 0.5-mm pitch and an exposed thermal pad. The thermal pad must be soldered to a PCB thermal plane for proper heat dissipation and electrical grounding, as specified in TI's packaging guidelines - critical for maintaining 115 mW power dissipation within safe junction temperature limits.