Texas Instruments ADS4142IRGZR

Overview

ADS4142IRGZR from Texas Instruments is a 14-bit, 65-MSPS ultra-low-power analog-to-digital converter (ADC) with dual LVDS/CMOS output interface, differential input, and integrated common-mode voltage reference (VCM = 0.95 V). It delivers 72.2 dBFS SNR at 170 MHz input and consumes only 103 mW at 65 MSPS on a single 1.8-V supply - optimized for wideband communications receivers and power amplifier linearization.

For engineers reviewing the ADS4142IRGZR datasheet, ADS4142IRGZR pinout, ADS4142IRGZR application, or ADS4142IRGZR equivalent, this page provides verified technical context, validated pin functions in both LVDS and CMOS modes, real-world dynamic performance metrics, and confirmed alternative options for multi-carrier wireless infrastructure and SDR designs.

Technical Context

The ADS4142IRGZR implements a pipelined ADC architecture with on-chip DC offset correction loop and programmable gain (up to +6 dB) to trade SNR for SFDR at high input frequencies. Its dual-mode DDR LVDS/CMOS interface supports configurable swing (200 mV or 350 mV) and termination (50 Ω or 100 Ω), while the internal VCM buffer simplifies analog input biasing.

It operates across –40°C to +85°C with 1.8-V AVDD/DRVDD supplies, supports low-clock-amplitude inputs down to 200 mV_PP, and features automatic dynamic power scaling - reducing consumption at lower sampling rates without degrading SNR or SFDR performance.

Key Specifications

Pinout & Package

VQFN-48 package (7.0 mm × 7.0 mm) with exposed thermal pad connected to DRGND - supports efficient heat dissipation in thermally constrained RF front-end PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS4142IRGZR, ADS4145IRGZR trades higher speed for identical resolution and interface flexibility, while ADS4122IRGZR offers lower cost and power at reduced bit depth - all share pin compatibility and thermal footprint, enabling scalable platform design.

Availability

ADS4142IRGZR is available at Aetrix Electronics and suitable for wireless infrastructure receivers, software-defined radios, power amplifier linearization systems, and medical ultrasound imaging requiring stable component supply and long-term industrial temperature support (–40°C to +85°C).

Supply support for ADS4142IRGZR 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 signal chain solutions for industrial, automotive, and communications markets.

The ADS41xx product line was designed specifically for ultra-low-power, high-dynamic-range digitization in multi-carrier wireless infrastructure and reconfigurable radio systems - emphasizing SNR/SFDR efficiency at 1.8-V operation.

FAQ

What is the maximum analog input frequency supported by the ADS4142IRGZR?

The ADS4142IRGZR supports up to 400 MHz analog input frequency with a 2-V_PP input amplitude, and up to 800 MHz with a 1-V_PP amplitude - verified per TI SBAS520C Rev C specifications. This enables direct sampling of L-band and S-band IF signals without external downconversion, preserving signal integrity in high-frequency receiver chains. The ADS4142IRGZR maintains its 72.2 dBFS SNR rating up to 170 MHz input, making it ideal for wideband cellular and radar applications.

Does the ADS4142IRGZR support both LVDS and CMOS output interfaces simultaneously?

No, the ADS4142IRGZR supports LVDS or CMOS output mode exclusively - selected via the DFS pin. In LVDS mode, it outputs multiplexed DDR data on differential pairs (e.g., D0_D1_P/M); in CMOS mode, it outputs single-ended 14-bit parallel data (D0–D13) at 1.8 V. Both modes share the same pin mapping for clock, control, and power, ensuring layout compatibility. The ADS4142IRGZR does not operate in hybrid or concurrent interface modes.

What is the function of the VCM pin on the ADS4142IRGZR?

The VCM pin on the ADS4142IRGZR outputs a precise 0.95-V common-mode voltage used to bias the differential analog input (INP/INM) network. This eliminates the need for external resistive dividers or active buffers in most designs, simplifying front-end matching and improving input impedance stability. The ADS4142IRGZR specifies VCM accuracy as ±0.05 V, and the pin is designed to drive typical AC-coupling capacitor networks directly - a key enabler for compact, high-performance RF receiver layouts.

How does dynamic power scaling work in the ADS4142IRGZR?

The ADS4142IRGZR automatically scales power consumption downward when operating below its rated 65-MSPS sampling rate - without sacrificing SNR, SFDR, or other AC performance metrics. This behavior is intrinsic to its internal clock-gating and bias current adjustment circuitry. At 30 MSPS, for example, power drops proportionally while maintaining 72.2 dBFS SNR at 170 MHz input. This feature makes the ADS4142IRGZR especially valuable in burst-mode or time-sliced applications such as TDD-based 5G NR or battery-powered spectrum analyzers.

Is the ADS4142IRGZR pin-compatible with other devices in the ADS41xx family?

Yes, the ADS4142IRGZR is pin-compatible with ADS4122IRGZR, ADS4125IRGZR, and ADS4145IRGZR in the VQFN-48 (RGZ) package - sharing identical power, ground, clock, data, and control pin locations. Differences exist only in functional capability (e.g., 12-bit vs. 14-bit, 65 vs. 125 MSPS), not physical layout. This enables drop-in replacement during prototyping or BOM optimization, provided the target application's resolution and speed requirements align with the chosen variant. The ADS4142IRGZR retains full register compatibility for serial configuration.