Texas Instruments ADS8342IBPFBRG4

Overview

ADS8342IBPFBRG4 from Texas Instruments is a 4-channel, 16-bit successive approximation register (SAR) analog-to-digital converter with true bipolar input (±2.5V), 250kSPS maximum sampling rate, selectable 8-/16-bit parallel interface, and TQFP-48 package. It integrates an on-chip sample-and-hold, 4:1 analog multiplexer, and 3-state parallel output drivers-designed for high-precision data acquisition in industrial process control systems.

For engineers reviewing the ADS8342IBPFBRG4 datasheet, ADS8342IBPFBRG4 pinout, ADS8342IBPFBRG4 application, or ADS8342IBPFBRG4 equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts, and supply-ready availability details-no generic claims or inferred capabilities.

Technical Context

The ADS8342IBPFBRG4 implements a capacitor-based SAR architecture with inherent sample-and-hold, enabling accurate conversion of ±2.5V differential inputs at up to 250kSPS using a 5MHz external clock and 1:1 internal clock divider. Its pseudo-differential input structure uses AINx/COMMON pairs with COMMON limited to ±0.1V, supporting common-mode noise rejection in noisy industrial environments.

It features dual ±5V analog/digital supplies (+AVDD/–AVDD, +DVDD/–DVDD) plus independent I/O buffer supply (BVDD = 2.7–5.5V), allowing interfacing with both 3.3V and 5V logic families. Conversion timing is controlled by CONV, CS, RD, and BYTE signals, with BUSY indicating active conversion status and DB0–DB15 providing 16-bit two's complement output.

Key Specifications

Pinout & Package

TQFP-48 package (PFB designation), 7mm × 7mm body, 0.5mm pitch, exposed thermal pad (not electrically connected). Pin 1 marked via corner cutout; pins 1–2 and 34–35 are NC (no connection) and must remain unconnected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit SAR ADC applications.

Compared with ADS8343IPFBT and ADS8326IPW, the ADS8342IBPFBRG4 uniquely balances 250kSPS speed, 4-channel multiplexing, true ±2.5V bipolar input, and COMMON-referenced noise immunity-making it irreplaceable in high-accuracy, multi-signal industrial DAQ where supply separation and grounding integrity are non-negotiable.

Availability

ADS8342IBPFBRG4 is available at Aetrix Electronics and suitable for industrial process control, medical diagnostic equipment, and laboratory data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.

Supply support for ADS8342IBPFBRG4 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 ADS8342IBPFBRG4 belongs to TI's precision SAR ADC product line, engineered specifically for high-accuracy, multi-channel data acquisition in harsh industrial and medical environments where bipolar input range, low drift, and robust noise immunity are mandatory.

FAQ

What is the guaranteed no-missing-codes resolution of the ADS8342IBPFBRG4?

The ADS8342IBPFBRG4 guarantees no missing codes at 16 bits across its full operating temperature range (–40°C to +85°C), as confirmed in the SBAS277 datasheet Table 1. This ensures monotonic transfer function and full code coverage for all 65,536 possible output values-critical for closed-loop control and metrology applications where code gaps cause nonlinearity errors. The ADS8342IBPFBRG4 achieves this with ±4 LSB integral linearity error.

Does the ADS8342IBPFBRG4 require an external reference voltage?

Yes, the ADS8342IBPFBRG4 requires an external reference voltage applied to the REFIN pin (Pin 41), with specification range 2.0V to 2.55V. The device includes an internal reference amplifier that buffers REFIN from switching currents, allowing use of high-impedance reference sources without external op-amps. A 0.22µF ceramic capacitor must be placed directly at the REFIN pin to suppress noise coupling into this high-impedance node.

How does the COMMON pin function in the ADS8342IBPFBRG4 analog input structure?

The COMMON pin (Pin 44) serves as the pseudo-differential reference for all four AINx inputs in the ADS8342IBPFBRG4. Unlike fully differential ADCs, COMMON is not resampled mid-conversion-it establishes the negative input node for the SAR capacitor array during hold mode. Its voltage must stay within ±0.1V of AGND to maintain linearity, enabling rejection of ground noise when connected to remote sensor grounds-a key feature for industrial signal integrity.

Can the ADS8342IBPFBRG4 interface directly with a 3.3V microcontroller?

Yes, the ADS8342IBPFBRG4 supports direct 3.3V LVCMOS interfacing via its BVDD supply pin (Pin 24), which accepts 2.7V–3.6V. When BVDD = 3.3V, digital inputs (CS, RD, CONV, etc.) recognize VIH ≥ 2.0V and VIL ≤ 0.8V, and outputs drive VOH ≥ 3.0V and VOL ≤ 0.2V-fully compatible with standard 3.3V MCUs without level shifters. This is explicitly specified in Section 5 of the SBAS277 datasheet.

What is the maximum achievable sampling rate of the ADS8342IBPFBRG4 and what clock configuration enables it?

The ADS8342IBPFBRG4 achieves its maximum 250kSPS sampling rate using a 5MHz external clock applied to the CLK pin (Pin 11) with CLKDIV0 = CLKDIV1 = 0 (1:1 internal clock divider). Each conversion requires 20 clock cycles (17 for conversion + 3 for acquisition), yielding a 4µs minimum throughput period. Higher external clocks (e.g., 20MHz) may be used with CLKDIV1:CLKDIV0 = 1:0 (4:1 division) to maintain 5MHz internal clock and full 250kSPS performance.