Texas Instruments ADS6148IRGZT

Overview

ADS6148IRGZT from Texas Instruments is a 14-bit, 210 MSPS analog-to-digital converter (ADC) with dual DDR LVDS and parallel CMOS digital outputs, integrated DC offset correction and programmable fine gain (up to +6 dB), designed for wideband communications infrastructure requiring high dynamic performance at low power (687 mW total at 210 MSPS) in a 48-QFN package.

For engineers reviewing the ADS6148IRGZT datasheet, ADS6148IRGZT pinout, ADS6148IRGZT application, or ADS6148IRGZT equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial-temperature (–40°C to 85°C) operation, real-world timing behavior at 210 MSPS, and direct alternative options with documented functional and interface differences.

Technical Context

The ADS6148IRGZT implements a pipeline ADC architecture with sample-and-hold, internal reference generation, and dual-output serialization-supporting simultaneous DDR LVDS (14-bit × 2 per clock edge) and parallel CMOS (14-bit × 1 per clock edge) modes. It features a fully differential analog input stage with 2 V_PP range and 700 MHz analog bandwidth.

Its control architecture supports three configuration methods: parallel pin strapping (DFS/MODE/SEN/SDATA), serial register programming (SCLK/SEN/SDATA), or hybrid mode where parallel pins override specific register bits per priority table. Latency is fixed at 18 clock cycles in default mode and configurable to 14 cycles in low-latency mode.

Key Specifications

Pinout & Package

ADS6148IRGZT uses a 48-pin QFN package (7 mm × 7 mm, RGZ designation) with exposed thermal pad. Pin functions are validated per TI SLWS211B datasheet Figures 1–4 and Tables 1–6.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS6149IRGZT, the ADS6148IRGZT trades 40 MSPS headroom for 60 mW lower analog power and lower cost, while retaining identical pinout, feature set, and configuration logic; versus ADS5547IPAP, it sacrifices 2 bits of resolution to gain 40 MSPS, DDR LVDS, internal reference, and 32-pin reduction-making it optimal for space-constrained, high-throughput wireless infrastructure.

Availability

ADS6148IRGZT is available at Aetrix Electronics and suitable for wireless infrastructure, software-defined radio, and test instrumentation requiring stable component supply, industrial-temperature operation, and long-term obsolescence management.

Supply support for ADS6148IRGZT 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 ADS6148IRGZT belongs to TI's high-speed ADC product line, engineered specifically for wideband communications infrastructure-including multicarrier base stations, SDR platforms, and radar digitizers-where dynamic performance, power efficiency, and interface flexibility are critical.

FAQ

What is the maximum analog input frequency supported by the ADS6148IRGZT?

The ADS6148IRGZT supports analog input frequencies up to 500 MHz with a 2 V_PP input amplitude and up to 800 MHz with a 1 V_PP amplitude, enabled by its 700 MHz analog input bandwidth and differential architecture. These limits are specified under recommended operating conditions with internal reference and 210 MSPS sampling.

Does the ADS6148IRGZT require external reference components?

No-the ADS6148IRGZT integrates an internal reference and eliminates traditional reference pins and associated decoupling capacitors. However, it also supports external reference operation via dedicated pins (VREFP/VREFN), allowing system designers to trade off convenience for improved accuracy or noise immunity when needed.

How does the DC offset correction function in the ADS6148IRGZT?

The ADS6148IRGZT implements a closed-loop DC offset correction circuit that continuously measures and subtracts input-referred offset in real time. It achieves full correction within 1 µs and maintains residual offset within ±2 mV across temperature, eliminating manual calibration in zero-IF receiver architectures.

What are the timing implications of using DDR LVDS versus parallel CMOS output on the ADS6148IRGZT?

In DDR LVDS mode, the ADS6148IRGZT delivers data on both clock edges with 0.8–1.2 ns setup time relative to CLKOUTP zero-crossing; in parallel CMOS mode, data is single-edge aligned with 3.2 ns input-clock-to-data delay and 0.7–1.5 ns valid window-requiring tighter FPGA timing closure but avoiding LVDS termination complexity.

Is the ADS6148IRGZT pin-compatible with other devices in the ADS61xx family?

Yes-the ADS6148IRGZT shares identical 48-QFN (RGZ) pinout and footprint with ADS6149IRGZT, ADS6128IRGZT, and ADS6129IRGZT. It is also pin-compatible with the ADS5547 family, enabling hardware reuse across 12-bit, 14-bit, and 16-bit sampling rate variants without PCB redesign.