Texas Instruments ADS6442IRGCR

Overview

ADS6442IRGCR from Texas Instruments is a dual-channel, 14-bit, 65 MSPS analog-to-digital converter with serialized LVDS outputs, internal PLL clock multiplication, and programmable coarse/fine gain. It operates from 3.3-V analog and digital supplies, features simultaneous sample-and-hold, and delivers 74.3 dBFS SINAD at 10 MHz input with 0 dB gain - optimized for IF sampling in diversity receivers and medical imaging front-ends.

For engineers reviewing the ADS6442IRGCR datasheet, ADS6442IRGCR pinout, ADS6442IRGCR application, or ADS6442IRGCR equivalent, this page provides verified technical context, real-world timing behavior (12-clock latency, 250 fs rms aperture jitter), LVDS interface configuration options (1-wire/2-wire, DDR/SDR), and validated alternative parts for system-level design continuity.

Technical Context

The ADS6442IRGCR implements a dual independent ADC core with simultaneous sampling, each feeding a digital encoder and serializer. Its internal PLL multiplies the input sampling clock to generate the LVDS bit clock, enabling serialization of 14-bit data per channel at rates below 1 Gbps using 2-wire LVDS mode.

It supports three interface configurations: 1-wire (lower frequency), 2-wire DDR (halved data rate), and 2-wire SDR (programmable 14×/16× serialization). Output format is configurable for MSB/LSB first and 2's complement/offset binary, with programmable LVDS current and internal termination for signal integrity optimization.

Key Specifications

Pinout & Package

ADS6442IRGCR is housed in a 48-pin QFN package (7 mm × 7 mm) with exposed thermal pad. Pin functions are defined per TI SLAS542B Rev. December 2013, with dedicated analog inputs (INA_P/INA_M, INB_P/INB_M), LVDS output pairs (DA0_P/DA0_M, DA1_P/DA1_M, DB0_P/DB0_M, DB1_P/DB1_M), frame/bit clocks (FCLKP/FCLKM, DCLKP/DCLKM), and configuration pins (CFG1–CFG4, PDNA, PDNB, SEN, SCLK, SDATA).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS6242IRGZR and ADS6243IRGZT, the ADS6442IRGCR provides identical core functionality to ADS6242 at a prototyping-friendly packaging format, while offering a 15 MSPS headroom buffer over minimum system requirements - simplifying clock tree design and easing timing closure in FPGA-based receivers.

Availability

ADS6442IRGCR is available at Aetrix Electronics and suitable for base-station IF receivers, medical ultrasound front-ends, and automated test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADS6442IRGCR 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 leadership in high-performance data converters and signal chain solutions.

The ADS64xx family was designed for high-density, low-power IF digitization in wireless infrastructure and medical imaging - emphasizing LVDS serialization, flexible gain control, and deterministic latency for real-time signal processing systems.

FAQ

What is the maximum sampling rate supported by the ADS6442IRGCR?

The ADS6442IRGCR supports a maximum sampling rate of 65 MSPS, as specified in TI's SLAS542B datasheet. This rate is guaranteed across the full industrial temperature range (–40°C to +85°C) with AVDD = LVDD = 3.3 V and proper decoupling. At this rate, the device achieves 74.3 dBFS SINAD and 84 dBc SFDR at 170 MHz input with 3.5 dB coarse gain enabled. The ADS6442IRGCR maintains full 14-bit resolution and no missing codes throughout its operating range.

Does the ADS6442IRGCR require external decoupling capacitors for its reference circuitry?

No, the ADS6442IRGCR does not require external decoupling capacitors for its internal reference - a key design feature confirmed in the SLAS542B datasheet. The device integrates a buffered 1.0 V to 2.0 V internal reference (VREFB/VREFT) with ±2 mV error and supports external reference mode via the VCM pin. When using the internal reference, all reference-related filtering is handled on-die, simplifying PCB layout and reducing BOM count. The ADS6442IRGCR retains this capability across all sampling rates from 5 MSPS to 65 MSPS.

How is the LVDS output interface configured on the ADS6442IRGCR?

The ADS6442IRGCR supports three LVDS interface modes: 1-wire (default), 2-wire DDR, and 2-wire SDR - selected via CFG1 and CFG2 pins. In 2-wire DDR mode, each channel's 14-bit data is serialized across two differential pairs (e.g., DA0_P/M and DA1_P/M), halving the bit clock frequency versus 1-wire. The ADS6442IRGCR also allows programmable LVDS current (3.5 mA nominal), internal termination (100 Ω), and output polarity inversion - all configurable via serial registers or parallel pins. These settings directly impact eye opening and FPGA capture reliability.

What is the ADC latency of the ADS6442IRGCR, and how is it affected by interface mode?

The ADS6442IRGCR has a fixed ADC core latency of 12 clock cycles, as shown in Figure 1 of SLAS542B. This latency is independent of interface mode (1-wire/2-wire) or serialization factor (14×/16×), because it reflects the analog pipeline delay before serialization. Total system latency includes additional serializer delay (e.g., +2 cycles in 2-wire DDR mode), but the ADS6442IRGCR's 12-cycle value ensures predictable timing for FPGA-based digital downconverters or real-time beamformers. Wake-up time from global power-down is 100 μs, preserving deterministic behavior during low-power operation.

Can the ADS6442IRGCR operate with an external reference, and what are the voltage requirements?

Yes, the ADS6442IRGCR supports external reference mode via the VCM pin, which must be biased between 1.45 V and 1.55 V (nominal 1.50 V) when using external reference - per the "RECOMMENDED OPERATING CONDITIONS" table in SLAS542B. In this mode, the internal reference is disabled, and full-scale input range becomes 2.0 Vpp differential. The ADS6442IRGCR maintains all AC specifications (SINAD, SFDR) under external reference conditions, and the VCM pin sources/sinks ±4 mA to drive external reference buffers. This capability enables system-level calibration and improved channel matching in multichip synchronizations.