Texas Instruments ADC3641IRSBT

Overview

ADC3641IRSBT from Texas Instruments is a 14-bit, dual-channel, 10-MSPS analog-to-digital converter optimized for low-noise, ultra-low-power operation in industrial and instrumentation systems. It delivers –155 dBFS/Hz noise floor, ±0.6 LSB INL, 79.0 dBFS SNR at 5 MHz input, and 1-clock-cycle latency with single 1.8-V supply. Used in high-speed control loops and thermal imaging front-ends where precision sampling and power efficiency are critical.

For engineers reviewing the ADC3641IRSBT datasheet, ADC3641IRSBT pinout, ADC3641IRSBT application, or ADC3641IRSBT equivalent, this page provides verified specifications, validated package mapping, confirmed pin functions, real-world spectral performance data (SNR/SFDR vs. f_IN), and two technically documented alternative parts for 10-MSPS dual-channel ADC selection.

Technical Context

The ADC3641IRSBT implements a fully differential pipeline architecture with on-chip 1.6-V reference support and optional decimation filters (2×–32×). Its 1-clock-cycle latency enables deterministic timing in closed-loop control, while DDR and serial CMOS digital interfaces reduce interconnect count without sacrificing throughput.

It operates across –40°C to +105°C using only 29 mW per channel at 10 MSPS, with internal voltage reference (1.6 V) and external reference (1.6 V) modes. Input bandwidth exceeds 900 MHz, supporting IF sampling up to 64 MHz with 74.0 dBFS SNR and 90-dBFS worst spur.

Key Specifications

Pinout & Package

ADC3641IRSBT is housed in a 40-pin WQFN (RSB) package measuring 5.0 mm × 5.0 mm with exposed thermal pad. The pinout supports dual analog inputs (AINP/M, BINP/M), differential clock (CLKP/M), flexible reference options (VREF, REFBUF, REFGND), and dual CMOS data buses (DA0–DA6, DB0–DB6) with configurable frame/bit clocks (DA1, DB1).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, 10-MSPS, 14-bit ADC applications.

Compared with ADC3641IRSBT, ADC3660IRSBT offers higher resolution and lower noise but consumes more power, while ADS131M02IPWR trades speed for extreme dc accuracy and ultra-low power-making each suitable for distinct segments of the precision data acquisition spectrum.

Availability

ADC3641IRSBT is available at Aetrix Electronics and suitable for high-speed control loops, thermal imaging front-ends, and power quality monitoring systems requiring stable component supply, extended temperature operation, and verified low-noise ADC performance.

Supply support for ADC3641IRSBT 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 ADC364x product line was designed specifically for ultra-low-power, low-latency, dual-channel high-speed data acquisition in thermally constrained and real-time control environments.

FAQ

What is the maximum input frequency supported by ADC3641IRSBT while maintaining specified SNR?

The ADC3641IRSBT maintains 74.0 dBFS SNR at 64 MHz input frequency with –1-dBFS differential signal, enabled by its 900-MHz analog input bandwidth (–3 dB). At lower frequencies like 5 MHz, SNR improves to 79.0 dBFS. Performance remains within datasheet AC specifications up to f_IN = 64 MHz, making ADC3641IRSBT suitable for IF sampling in communications and radar front-ends.

Does ADC3641IRSBT support both internal and external voltage references?

Yes, ADC3641IRSBT supports an internal 1.6-V bandgap reference or external 1.6-V reference via the VREF pin. It also accepts a 1.2-V external reference through REFBUF with internal 100-kΩ pull-up to AVDD. Reference selection is configured via SPI registers, and dc accuracy specs (e.g., ±0.6 LSB INL) apply to both modes, though gain drift differs: 25 ppm/°C (external) vs. 151 ppm/°C (internal).

What digital interface options does ADC3641IRSBT provide, and how do they affect latency?

ADC3641IRSBT offers DDR CMOS and serialized CMOS (1-wire, 2-wire, or 1/2-wire) interfaces. Base latency is fixed at 1 clock cycle for all modes. Serialized modes add configurable decimation-related latency: 21–23 output clock cycles for real/complex decimation by 2–32. DDR CMOS delivers raw 14-bit samples with minimal interface overhead, while serialized modes reduce pin count at the cost of added processing delay.

How does ADC3641IRSBT achieve ultra-low power consumption at 10 MSPS?

ADC3641IRSBT achieves 29 mW per channel at 10 MSPS through adaptive biasing, optimized pipeline stages, and single 1.8-V supply operation. Power scales linearly with sample rate-dropping to ~27 mA analog current at 10 MSPS (vs. 78 mA at 65 MSPS). Internal reference mode adds only 2 mA, and global power-down reduces dissipation to 5 mW, making ADC3641IRSBT ideal for energy-sensitive industrial edge nodes.

Is ADC3641IRSBT pin-compatible with other members of the ADC364x family?

Yes, ADC3641IRSBT is pin-to-pin compatible with ADC3642IRSBT (25 MSPS) and ADC3643IRSBT (65 MSPS) in the same 40-pin RSB package. All share identical pin functions, power domains (AVDD/IOVDD), reference interface, and digital I/O structure. This allows hardware reuse across speed grades-only firmware and clock configuration need adjustment when upgrading sampling rates.