Texas Instruments ADS6149IRGZR

Overview

ADS6149IRGZR from Texas Instruments is a 14-bit, 250 MSPS analog-to-digital converter (ADC) with dual DDR LVDS and parallel CMOS digital outputs, integrated DC offset correction, programmable fine gain (up to +6 dB), and internal reference support. It operates from 3.3 V AVDD and 1.8 V DRVDD supplies, dissipates 687 mW at full rate, and targets high-bandwidth communications signal acquisition.

For engineers reviewing the ADS6149IRGZR datasheet, ADS6149IRGZR pinout, ADS6149IRGZR application, or ADS6149IRGZR equivalent, this page delivers verified specifications, package mapping, functional alternatives, and design-critical timing and interface details for wireless infrastructure, SDR, and test instrumentation systems.

Technical Context

The ADS6149IRGZR employs a pipelined ADC architecture with sample-and-hold and on-chip clock generation, supporting both internal and external reference modes. Its DDR LVDS serializer delivers 14-bit data across 7 differential pairs (D0_D1_P/M through D12_D13_P/M) plus OVR_SDOUT, while parallel CMOS mode outputs 14 single-ended bits (D0–D13).

Latency is fixed at 18 clock cycles in default mode (14 cycles in low-latency mode), with aperture jitter of 170 fs rms and input bandwidth of 700 MHz. Clock input accepts differential signals down to 400 mV_PP, and the device automatically scales power at reduced sampling rates without performance loss.

Key Specifications

Pinout & Package

ADS6149IRGZR is housed in a 48-pin QFN package (RGZ designation), 7 mm × 7 mm body with exposed thermal pad. Pin pitch is 0.5 mm; package complies with JEDEC MO-220 standards and requires soldering to a 4-layer PCB with 2 oz copper for θ_JA = 25.4°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS6149IRGZR, ADS6148IRGZR trades 40 MSPS speed for lower power and thermal footprint, while ADS5547IPAP sacrifices speed and interface flexibility for 2-bit resolution gain-making each optimal for distinct signal chain priorities.

Availability

ADS6149IRGZR is available at Aetrix Electronics and suitable for wireless infrastructure, software-defined radio, and test instrumentation requiring stable component supply across extended product lifecycles.

Supply support for ADS6149IRGZR 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 ADS61xx family was designed specifically for wideband, multicarrier communications systems-delivering high-speed, high-dynamic-range digitization in compact, thermally efficient packages for 4G/5G infrastructure and defense electronics.

FAQ

What is the maximum analog input frequency supported by the ADS6149IRGZR?

The ADS6149IRGZR supports analog input frequencies up to 500 MHz when using a 2 V_PP differential input amplitude, and up to 800 MHz at 1 V_PP. Its 700 MHz analog input bandwidth ensures minimal roll-off within these ranges, enabling direct IF sampling for cellular and WiMAX applications without external anti-alias filtering.

Does the ADS6149IRGZR require external reference components?

No-the ADS6149IRGZR includes an internal reference and eliminates the need for external reference pins and decoupling capacitors. However, it also supports external reference operation via dedicated pins, providing design flexibility for systems requiring tighter voltage accuracy or temperature stability beyond the internal reference's ±1.25% gain error specification.

What output interface options does the ADS6149IRGZR support?

The ADS6149IRGZR supports two configurable digital output interfaces: DDR LVDS (7 differential pairs + OVR_SDOUT) and parallel CMOS (14 single-ended outputs + OVR_SDOUT). Interface selection is controlled via the DFS pin or serial register configuration, allowing system-level optimization for noise immunity (LVDS) or logic-level compatibility (CMOS).

How does the fine gain feature improve performance in the ADS6149IRGZR?

The programmable fine gain (±6 dB) in the ADS6149IRGZR adjusts the ADC's effective full-scale range to match lower-amplitude input signals-improving SFDR by reducing harmonic distortion at small signal levels. This avoids clipping while maximizing dynamic range utilization, especially valuable in SDR and multicarrier communication systems with variable signal envelopes.

Is the ADS6149IRGZR pin-compatible with other devices in its family?

Yes-the ADS6149IRGZR is pin-compatible with the ADS6148IRGZR (210 MSPS), ADS6129IRGZR (12-bit, 250 MSPS), and ADS6128IRGZR (12-bit, 210 MSPS), all in the same 48-QFN RGZ package. It is also pin-compatible with the ADS5547 family, enabling hardware reuse and migration paths without PCB redesign.