Texas Instruments ADS62P29IRGC25

Overview

ADS62P29IRGC25 from Texas Instruments is a dual-channel, 12-bit, 250-MSPS analog-to-digital converter (ADC) with DDR LVDS and parallel CMOS digital outputs. It features internal/external reference support, programmable gain up to 6 dB, DC offset correction, and operates over –40°C to +85°C. Designed for wideband communications infrastructure, it delivers 68.3 dBFS SINAD and 75 dBc SFDR at 170 MHz input with 0 dB gain.

For engineers reviewing the ADS62P29IRGC25 datasheet, ADS62P29IRGC25 pinout, ADS62P29IRGC25 application, or ADS62P29IRGC25 equivalent, key selection considerations include its 250-MSPS sampling rate in LVDS mode, 64-QFN (9 mm × 9 mm) package, dual-channel interleaving latency of 22 clock cycles, and compatibility with low-amplitude differential clocks down to 400 mV_PP.

Technical Context

The ADS62P29IRGC25 implements two independent 12-bit SAR-based ADC cores with sample-and-hold circuits, each driven by a shared differential clock input (CLKP/CLKM). Its digital output path supports either DDR LVDS (with 100 Ω termination) or parallel CMOS, selectable via SEN pin or serial register configuration.

It integrates a DC offset correction loop per channel, programmable gain amplifier (0 dB or 6 dB), and internal voltage reference (1.5 V ±0.05 V common-mode), eliminating external reference decoupling. The device uses a 22-cycle deterministic latency pipeline and supports low-speed mode (<80 MSPS) and multiplexed output mode via serial interface only.

Key Specifications

Pinout & Package

ADS62P29IRGC25 is housed in a thermally enhanced 64-pin QFN package (RGC, 9 mm × 9 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per TI SLAS635B Rev. January 2011.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS62P28IRGC25 and ADS62C17IRGCT, the ADS62P29IRGC25 uniquely delivers 250-MSPS operation with DDR LVDS and programmable gain - essential for next-generation wireless infrastructure demanding higher instantaneous bandwidth and spurious-free performance.

Availability

ADS62P29IRGC25 is available at Aetrix Electronics and suitable for wireless infrastructure, radar signal acquisition, software-defined radio front ends, and medical ultrasound beamformers requiring stable component supply and long-term industrial temperature support.

Supply support for ADS62P29IRGC25 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 ADS62Pxx family was designed specifically for wideband, multi-carrier communications infrastructure - delivering high dynamic performance, low power, and flexible digital interfacing in compact QFN packages.

FAQ

What is the maximum sampling rate supported by ADS62P29IRGC25 in LVDS versus CMOS mode?

The ADS62P29IRGC25 supports up to 250 MSPS in DDR LVDS mode, as confirmed in the datasheet's Recommended Operating Conditions table. In parallel CMOS mode, the maximum recommended sampling rate is 210 MSPS due to timing margin limitations on data valid windows and clock propagation delay. Exceeding 210 MSPS in CMOS mode risks setup/hold violations at the FPGA capture interface. The ADS62P29IRGC25 must be configured for LVDS output to achieve full 250-MSPS capability.

Does ADS62P29IRGC25 require external reference components?

No, the ADS62P29IRGC25 does not require external reference components. It integrates an internal 1.5 V reference with ±0.05 V tolerance and eliminates the need for external decoupling capacitors on the VREF pins. However, it retains full compatibility with external references - the VCM pin can accept 1.5 V ±0.05 V in external reference mode, and the device supports both internal and external configurations via the SCLK pin or serial register control. This flexibility simplifies layout while maintaining precision.

What is the aperture jitter specification for ADS62P29IRGC25, and how does it impact SNR?

The ADS62P29IRGC25 has a typical aperture jitter of 145 fs RMS, as specified in the Timing Requirements section of the datasheet. At a 170 MHz input frequency, this jitter contributes approximately 0.4 dB of theoretical SNR degradation - consistent with the measured 68.3 dBFS SINAD value. The low jitter enables high-fidelity digitization of wideband signals in communications and radar applications where phase noise and spectral purity are critical. Jitter performance is maintained across the full –40°C to +85°C temperature range.

Can ADS62P29IRGC25 operate with a single-ended input clock?

No, the ADS62P29IRGC25 requires a differential input clock applied to CLKP and CLKM pins. The datasheet specifies absolute maximum and recommended operating conditions exclusively for differential clock signals (e.g., 0.2–1.5 V_PP sine wave, LVDS, LVPECL, or LVCMOS differential). Single-ended clock injection is not supported - attempting to drive only CLKP while leaving CLKM floating or grounded violates the common-mode voltage specification and may cause latch-up or degraded AC performance. A differential clock source or transformer is mandatory.

How is channel matching characterized for ADS62P29IRGC25?

Channel matching for ADS62P29IRGC25 is specified as ±2% full-scale gain error matching and ±50 ps aperture delay matching between Channel A and Channel B, per the Electrical Characteristics tables. These values are measured across the full temperature range (–40°C to +85°C) and ensure coherent dual-channel operation for I/Q demodulation and MIMO systems. The device also achieves 90 dB cross-talk suppression up to 200 MHz, minimizing inter-channel interference during simultaneous sampling - a key requirement verified in the ADS62P29IRGC25 production test flow.