Texas Instruments ADS8412IPFBR

Overview

ADS8412IPFBR 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, –40°C to 85°C industrial temperature range, and high-speed parallel interface supporting both 16-bit and 8-bit bus transfers. It delivers zero-latency conversion for real-time data acquisition in instrumentation and medical systems.

For engineers reviewing the ADS8412IPFBR datasheet, ADS8412IPFBR pinout, ADS8412IPFBR application, or ADS8412IPFBR equivalent, key selection criteria include guaranteed 16-bit no-missing-codes performance over temperature, 25 ps aperture jitter, 80 dB CMRR, 175 mW typical power dissipation at 2 MHz, and support for internal/external reference configurations with dual-buffered REFIN/REFOUT architecture.

Technical Context

The ADS8412IPFBR implements a capacitor-based SAR architecture with inherent sample-and-hold, internal oscillator-driven conversion clock, and two-stage reference buffering. Its differential input stage accepts ±4.096 V spans with 25 pF input capacitance and requires ≤100 ns acquisition time for full 16-bit settling.

Control logic supports flexible timing modes: CS-triggered sampling, CONVST-initiated hold, BUSY-synchronized readout, and BYTE-selectable 8/16-bit parallel output in two's complement format. Reset is asynchronous and clears latches within 50 ns, enabling deterministic startup and abort recovery.

Key Specifications

Pinout & Package

ADS8412IPFBR is housed in a 48-pin TQFP (PFB) package with exposed thermal pad. Pin functions are validated per TI SLAS384A datasheet, including dual analog/digital ground separation (AGND/BDGND), independent analog (+VA) and digital bus (+VBD) supplies, and dedicated reference pins (REFIN, REFOUT, REFM).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8412IPFBR, ADS8411IPFBR trades 50% throughput for lower power and cost in less demanding applications, while AD7606BSTZ addresses multi-channel synchronization needs but lacks the 2 MSPS speed and parallel interface simplicity of ADS8412IPFBR.

Availability

ADS8412IPFBR is available at Aetrix Electronics and suitable for instrumentation systems, medical data acquisition, communications infrastructure, and industrial motor control requiring stable component supply, long-term industrial temperature support, and guaranteed 16-bit performance.

Supply support for ADS8412IPFBR 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 connectivity technologies with decades of precision data converter innovation.

The ADS8412IPFBR belongs to TI's high-speed SAR ADC product line, engineered for applications demanding zero-latency, high-resolution digitization in resource-constrained industrial and medical systems.

FAQ

What is the guaranteed resolution and linearity performance of ADS8412IPFBR over temperature?

The ADS8412IPFBR guarantees 16-bit no-missing-codes operation across its full industrial temperature range of –40°C to +85°C. Its integral nonlinearity (INL) is specified at ±2.5 LSB max and differential nonlinearity (DNL) at ±0.8 LSB max for the ADS8412IB variant, ensuring monotonic behavior and precision in closed-loop systems. These values are measured with Vref = 4.096 V, +VA = 5 V, and fSAMPLE = 2 MHz.

Does ADS8412IPFBR require an external clock source for operation?

No, ADS8412IPFBR does not require an external clock. It uses an internal oscillator to generate the conversion clock, enabling a fixed 2 MSPS throughput with only CONVST, CS, and RD control signals needed. This simplifies system timing design and eliminates clock distribution noise coupling into the analog section, contributing to its 90 dB SNR and 25 ps aperture jitter specifications.

How does the BYTE pin function in ADS8412IPFBR's parallel interface?

The BYTE pin on ADS8412IPFBR configures the 16-bit parallel output for compatibility with 8-bit microcontrollers. When BYTE = 0, DB[15:0] outputs the full 16-bit result. When BYTE = 1, DB[15:8] outputs D[7:0] (low byte), allowing two sequential 8-bit reads to reconstruct the full word. This eliminates the need for external data latches or bus transceivers in legacy 8-bit designs.

Can ADS8412IPFBR operate with an external reference, and what are the voltage requirements?

Yes, ADS8412IPFBR supports external reference operation via the REFIN pin, accepting 3.9 V to 4.2 V with 500-kΩ input resistance. When using an external reference, REFOUT may be left floating, and the internal 4.096-V reference is disabled. The device maintains full AC/DC specifications across this range, and the second reference buffer isolates the external source from CDAC switching transients.

What is the role of the RESET pin in ADS8412IPFBR, and how does it interact with other control signals?

The RESET pin on ADS8412IPFBR is an asynchronous active-low input that independently aborts the current conversion and clears all output latches to zero within 50 ns. It operates regardless of CS, RD, or CONVST states. After RESET deassertion, the first sampling period begins 20 ns later, providing deterministic initialization for safety-critical applications like motor overcurrent protection or medical defibrillator readiness checks.