Texas Instruments ADS8411IPFBT

Overview

ADS8411IPFBT from Texas Instruments is a 16-bit, 2 MSPS unipolar successive-approximation register (SAR) analog-to-digital converter with integrated 4.096-V reference, 48-pin TQFP package, and parallel 8-/16-bit interface. It delivers ±1.5 LSB INL, 85 dB SINAD at 100 kHz, and 25 ps aperture jitter for high-fidelity data acquisition in instrumentation and medical systems.

For engineers reviewing the ADS8411IPFBT datasheet, ADS8411IPFBT pinout, ADS8411IPFBT application, or ADS8411IPFBT equivalent, this page provides verified timing parameters (340 ns conversion time), bus interface behavior (BYTE-controlled 8-bit folding), absolute maximum ratings (–0.4 V to +VA + 0.1 V on +IN), and industrial temperature operation (–40°C to +85°C).

Technical Context

The ADS8411IPFBT employs a capacitor-based SAR architecture with inherent sample-and-hold, internal oscillator-driven conversion clock, and dual-buffered reference path. Its unipolar single-ended input accepts 0 V to V_REF (4.096 V) with ±0.2 V common-mode tolerance on –IN and full-scale span control via REFIN/REFOUT pins.

Timing is governed by asynchronous control signals: CONVST falling edge initiates hold mode and sets BUSY high; BUSY falling edge signals conversion completion; RD and CS jointly enable 3-state parallel output. BYTE pin selects between full 16-bit DB[15:0] output or folded 8-bit reads (D[15:8] then D[7:0] on DB[15:8]).

Key Specifications

Pinout & Package

ADS8411IPFBT is housed in a 48-pin Thin Quad Flat Package (TQFP) with exposed thermal pad (PFB designation), rated for –40°C to +85°C industrial operation. Pin functions are validated per TI SLAS369B datasheet Rev. December 2004.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8325IPW and AD7606BSTZ, the ADS8411IPFBT uniquely combines 2-MSPS throughput, integrated 4.096-V reference, and zero-latency SAR architecture-making it optimal for single-channel, high-fidelity, time-critical acquisition where board space and reference calibration burden must be minimized.

Availability

ADS8411IPFBT is available at Aetrix Electronics and suitable for high-speed instrumentation, medical data acquisition, and transducer interface applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for ADS8411IPFBT 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 ADS8411IPFBT belongs to TI's high-speed SAR ADC product line, engineered specifically for applications demanding 16-bit resolution, sub-500 ns conversion time, and integrated reference stability in compact industrial systems.

FAQ

What is the maximum sample rate supported by the ADS8411IPFBT?

The ADS8411IPFBT supports a maximum throughput rate of 2 MSPS, enabled by its 400 ns typical conversion time and internal oscillator. This allows sustained sampling of signals up to 1 MHz (Nyquist limit) while maintaining full 16-bit resolution and specified linearity (±1.5 LSB INL). The device achieves this without requiring an external clock input.

Does the ADS8411IPFBT require an external reference voltage?

No-the ADS8411IPFBT includes a factory-trimmed 4.096-V internal reference with 36 ppm/°C drift and 120 ms startup time. When using the internal reference, REFOUT must be connected to REFIN with a 0.1-µF decoupling capacitor, and a 1-µF storage capacitor must be placed between REFOUT and REFM. An external reference (3.9–4.2 V) may be used by connecting it to REFIN and leaving REFOUT floating.

How does the BYTE pin affect data readout on the ADS8411IPFBT?

The BYTE pin configures the ADS8411IPFBT's parallel interface for either 16-bit or 8-bit operation. When BYTE = 0, full 16-bit data appears on DB[15:0]. When BYTE = 1, the first read returns D[15:8] on DB[15:8], and the second read (after BYTE toggles high) returns D[7:0] on the same pins-enabling compatibility with 8-bit microcontrollers without external multiplexing.

What is the purpose of the RESET pin on the ADS8411IPFBT?

The RESET pin on the ADS8411IPFBT is an asynchronous active-low signal that aborts the current conversion and clears all output latches to zero within 50 ns. It operates independently of CS and CONVST, allowing deterministic recovery from fault conditions or synchronization events. Minimum RESET pulse width is 25 ns, and the device resumes normal sampling 20 ns after RESET returns high.

Can the ADS8411IPFBT operate with separate analog and digital supply voltages?

Yes-the ADS8411IPFBT uses independent power domains: +VA (4.75–5.25 V) for analog circuitry including the SAR core and reference, and +VBD (2.7–5.25 V) for the digital interface (DB[15:0], BUSY, RD, CS, etc.). This separation minimizes digital switching noise coupling into the analog path, preserving 85 dB SINAD performance. AGND and BDGND must be connected at a single point near the device.