Texas Instruments ADS8412IBPFBT

Overview

ADS8412IBPFBT from Texas Instruments is a 16-bit, 2 MSPS unipolar differential-input successive approximation register (SAR) analog-to-digital converter with integrated 4.096-V reference, 48-pin TQFP package, and high-speed parallel interface. It delivers ±1.5 LSB integral nonlinearity, 90 dB SNR at 100 kHz, and 175 mW typical power dissipation - enabling precision data acquisition in medical instruments and transducer interfaces.

For engineers reviewing the ADS8412IBPFBT datasheet, ADS8412IBPFBT pinout, ADS8412IBPFBT application, or ADS8412IBPFBT equivalent, key selection considerations include its zero-latency SAR architecture, dual-voltage supply support (+VA = 5 V, +VBD = 3–5 V), unipolar differential input range (±4.096 V), 8-/16-bit bus transfer capability, and industrial temperature rating (–40°C to +85°C).

Technical Context

The ADS8412IBPFBT implements a capacitor-based SAR conversion core with inherent sample-and-hold, internal oscillator-driven timing (no external clock required), and true differential input stage accepting ±4.096 V span. Its conversion logic uses endpoint INL measurement and two's complement output coding.

Control is managed via asynchronous signals: CONVST falling edge initiates hold mode, BUSY indicates active conversion, RD/CS enable parallel data output, and BYTE selects 8-bit or 16-bit read modes. The device supports both internal reference (REFOUT→REFIN with 1 µF storage cap) and external reference (3.9–4.2 V) operation with separate REFM pins.

Key Specifications

Pinout & Package

ADS8412IBPFBT is housed in a 48-pin TQFP (PFB) package with exposed thermal pad. Pin functions are validated per TI SLAS384A 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 ADS8412IBPFBT, ADS8411IBPFBT trades 50% throughput for lower power and cost, while AD7606BSTZ offers channel count and simultaneity at the expense of speed and single-channel latency - making ADS8412IBPFBT uniquely suited for demanding single-channel, zero-latency, 2 MSPS applications.

Availability

ADS8412IBPFBT is available at Aetrix Electronics and suitable for medical instrumentation, high-speed data acquisition systems, and transducer interface designs requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for ADS8412IBPFBT 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, embedded processing, and high-performance data converters for industrial, automotive, and communications markets.

The ADS8412IBPFBT belongs to TI's precision high-speed SAR ADC product line, engineered for applications demanding zero-latency conversion, integrated reference stability, and robust industrial-grade operation without external clocking.

FAQ

What is the maximum sample rate supported by the ADS8412IBPFBT?

The ADS8412IBPFBT supports a maximum throughput rate of 2 MSPS, with a typical conversion time of 400 ns and acquisition time of 100 ns. This allows sustained sampling at the full 2 million samples per second under specified conditions (+VA = 5 V, +VBD = 3–5 V, TA = –40°C to +85°C). The internal oscillator eliminates dependency on external clock sources, simplifying system timing design for the ADS8412IBPFBT.

Does the ADS8412IBPFBT require an external reference voltage?

No, the ADS8412IBPFBT includes a fully integrated, buffered 4.096-V internal reference with 36 ppm/°C drift and 0.6 mV line regulation. When using the internal reference, REFOUT must be connected to REFM via a 1 µF storage capacitor. An external reference (3.9–4.2 V) may be applied to REFIN if higher precision or custom voltage levels are needed - but the ADS8412IBPFBT operates fully functional without any external reference component.

How does the BYTE pin affect data readout on the ADS8412IBPFBT?

The BYTE pin on the ADS8412IBPFBT selects between 16-bit and 8-bit parallel data transfer modes. When BYTE = 0, DB15–DB0 output the full 16-bit two's complement result. When BYTE = 1, DB15–DB8 output the lower byte (D7–D0) of the conversion result, enabling 8-bit microcontroller compatibility via two sequential reads. This dual-mode capability is a core feature of the ADS8412IBPFBT and requires no configuration registers or firmware overhead.

What are the power supply requirements for the ADS8412IBPFBT?

The ADS8412IBPFBT requires two independent supplies: +VA = 4.75–5.25 V (analog core, typical 35–40 mA current) and +VBD = 2.7–5.25 V (digital I/O, ~1 mA typical). AGND and BDGND must be kept separate and joined at a single point to prevent digital noise from modulating the analog reference. Total power dissipation is 175 mW at 2 MSPS - verified in the ADS8412IBPFBT datasheet under standard operating conditions.

Is the ADS8412IBPFBT pin-compatible with other devices in the ADS84xx family?

Yes, the ADS8412IBPFBT shares the same 48-pin TQFP (PFB) package and pinout with ADS8411IBPFBT and ADS8413IBPFBT, differing only in speed grade (1/2/3 MSPS) and INL/DNL specifications. This allows hardware reuse across performance tiers - for example, upgrading from ADS8411IBPFBT to ADS8412IBPFBT requires no PCB change, only firmware timing adjustment. However, ADS8412IBPFBT is not pin-compatible with unrelated families such as AD7606 or MAX1190.