Texas Instruments THS12082IDA

Overview

THS12082IDA from Texas Instruments is a 12-bit, 8 MSPS simultaneous-sampling analog-to-digital converter (ADC) with dual analog inputs, integrated 16-word FIFO, and 5-V analog/3.3-V digital supply operation. It supports single-ended or differential input configurations, delivers 66 dB SNR+D at 2 MHz, and operates across –40°C to 85°C for radar and high-speed DSP front-end applications.

For engineers reviewing the THS12082IDA datasheet, THS12082IDA pinout, THS12082IDA application, or THS12082IDA equivalent, key selection criteria include simultaneous dual-channel sampling capability, internal 3.5 V/1.5 V reference accuracy (±5%, 50 ppm/°C), FIFO-triggered data readout, ±1 LSB DNL, and TSSOP-32 DA package compatibility with industrial temperature range.

Technical Context

The THS12082IDA employs a multistage pipelined ADC architecture with output error correction logic ensuring no missing codes over its full –40°C to 85°C operating range. It supports two conversion modes: single-conversion (internally clocked, up to 4 MSPS per channel) and continuous-conversion (externally clocked, up to 8 MSPS per channel with one input or 4 MSPS with two).

Its dual-input structure enables simultaneous sampling of either two single-ended signals or one differential pair, with programmable input configuration via control registers CR0 and CR1. The integrated 16-word circular FIFO reduces processor interrupt load, and DATA_AV signal timing is configurable via trigger level (1, 4, 8, or 14 words) depending on channel count.

Key Specifications

Pinout & Package

TSSOP-32 (DA) package with 0.65 mm pitch; thermally enhanced layout featuring separate analog (AVDD/AGND), digital (DVDD/DGND), and buffer (BVDD/BGND) power domains to minimize noise coupling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar simultaneous-sampling ADC applications.

Compared with ADS8364IPAG and AD7656ASTZ, the THS12082IDA offers superior sampling speed (8 MSPS vs ≤250 kSPS) and integrated FIFO for burst-mode acquisition, making it uniquely suitable for real-time radar and communications front-ends requiring phase coherence and low-latency data flow.

Availability

THS12082IDA is available at Aetrix Electronics and suitable for radar signal acquisition, industrial motor control, communications baseband processing, and high-speed test equipment requiring stable component supply across extended temperature ranges.

Supply support for THS12082IDA 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 high-performance data converters and signal chain solutions.

The THS12082IDA belongs to TI's high-speed precision ADC product line, designed specifically for demanding applications requiring simultaneous sampling, low power, and robust operation in industrial and automotive environments.

FAQ

What is the maximum sampling rate per channel for THS12082IDA in continuous conversion mode?

The THS12082IDA achieves 8 MSPS per channel when configured for a single analog input in continuous conversion mode. With two simultaneously sampled inputs, the maximum rate drops to 4 MSPS per channel due to pipeline arbitration and FIFO write sequencing-verified in Table 1 of the SLAS271B datasheet. This behavior is inherent to the dual-channel pipelined architecture and cannot be overridden by external clocking.

Does THS12082IDA support differential input configuration, and what is the full-scale range?

Yes, THS12082IDA supports differential input mode using AINP and AINM pins. In this configuration, the full-scale input range is defined by the reference voltage difference: V_REFP – V_REFM = 2 V (with internal references set to 3.5 V and 1.5 V). The device accepts differential signals from –2 V to +2 V, producing a 12-bit binary or two's complement output as specified in Tables 5 and 6.

How does the FIFO in THS12082IDA reduce processor overhead?

The THS12082IDA's 16-word FIFO buffers converted data and generates DATA_AV interrupts only when user-configured trigger levels (1, 4, 8, or 14 words) are met. This allows the host processor to read data in bursts instead of servicing an interrupt every sample-reducing interrupt frequency by up to 16× and freeing CPU cycles for real-time signal processing tasks.

Can THS12082IDA operate with an external reference, and how is it enabled?

Yes, THS12082IDA supports external reference voltages applied to REFP and REFM pins. To enable this mode, bit VREF (bit 0) in control register CR0 must be set to '1'. When enabled, the internal 3.5 V/1.5 V reference is disabled, and the external voltages directly define the ADC's full-scale range and zero-scale point-allowing optimization for dc accuracy or temperature stability beyond the internal reference's ±5% tolerance.

What is the purpose of the CONV_CLK/CONVST pin, and how does its function change between modes?

The CONV_CLK/CONVST pin serves dual roles: in single-conversion mode, it acts as the edge-triggered CONVST (conversion start) input; in continuous-conversion mode, it becomes the CONV_CLK sampling clock input. Mode selection is controlled by bit MODE (bit 1) in CR0. The pin's function is mutually exclusive-no configuration allows concurrent use as both trigger and clock-and the internal oscillator is automatically disabled when external clocking is active.