Texas Instruments ADS42JB69IRGCT

Overview

ADS42JB69 from Texas Instruments is a dual-channel, 16-bit, 250-MSPS analog-to-digital converter (ADC) with JESD204B serial interface (subclass 0/1/2, up to 3.125 Gbps), differential analog input buffer (2 VPP or 2.5 VPP full-scale), and internal dither for enhanced SFDR. It targets high-frequency I/Q sampling in microwave receivers and multimode cellular base stations.

For engineers reviewing the ADS42JB69 datasheet, ADS42JB69 pinout, ADS42JB69 application, or ADS42JB69 equivalent, this page delivers verified electrical specs (73.3 dBFS SNR at 170 MHz, 93 dBc HD2/HD3 SFDR), JESD204B lane configuration (2–4 lanes), aperture jitter (85 fS rms), and channel isolation (100 dB) - all critical for RF receiver design and clock-jitter-sensitive sampling systems.

Technical Context

The ADS42JB69 employs a buffered front-end architecture with high-impedance analog inputs (1.2 kΩ || 4 pF at 170 MHz) and register-programmable differential input range (2 VPP or 2.5 VPP). Its internal PLL supports 10× or 20× clock multiplication, enabling flexible system clocking with divide-by-1/2/4 clock buffer options.

JESD204B output supports subclass 0 (deterministic latency), subclass 1 (SYSREF-synchronized), and subclass 2 (SYNC~-triggered), with configurable lane count (2 or 4) and data rates up to 3.125 Gbps. Latency is deterministic: 23 ADC clock cycles in 10× mode, with tD = 0.65 × tS + 3 ns.

Key Specifications

Pinout & Package

ADS42JB69 is housed in a thermally enhanced 9-mm × 9-mm VQFN-64 package (RGC) with exposed thermal pad connected to ground. The pinout supports dual analog input channels (INAP/INAM, INBP/INBM), differential clock (CLKINP/CLKINM), JESD204B serial lanes (DA0P/DA0M, DA1P/DA1M, DB0P/DB0M, DB1P/DB1M), SYSREF/SYNC~ synchronization, and CMOS overrange flags (OVRA/OVRB).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS42JB49 and ADS54J60, the ADS42JB69 uniquely balances 16-bit resolution, integrated analog buffering, and JESD204B subclass flexibility - making it optimal for microwave I/Q receivers where input drive simplicity, spurious performance, and multi-device synchronization coexist as non-negotiable requirements.

Availability

ADS42JB69 is available at Aetrix Electronics and suitable for multi-carrier cellular infrastructure, radar beamforming systems, and microwave I/Q receiver designs requiring stable component supply, long-term obsolescence management, and traceable sourcing from authorized TI channels.

Supply support for ADS42JB69 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, communications, and aerospace applications.

The ADS42JB69 belongs to TI's high-speed ADC portfolio designed specifically for RF-sampling receiver architectures in wireless infrastructure, defense electronics, and test instrumentation - emphasizing linearity, low jitter, and JESD204B interoperability.

FAQ

What is the maximum analog input frequency supported by the ADS42JB69?

The ADS42JB69 supports analog input frequencies up to 400 MHz with 2-VPP full-scale input and up to 250 MHz with 2.5-VPP full-scale input, as specified under Recommended Operating Conditions. Performance metrics such as SNR and SFDR are characterized up to 230 MHz, with usable spurious-free operation confirmed at 300 MHz (SFDR = 71 dBc, SNR = 73.4 dBFS) per typical characteristics plots.

Does the ADS42JB69 require an external reference voltage?

No, the ADS42JB69 uses an internal reference and does not require an external reference voltage. Its gain error specification (±2% FS from EGREF) is based solely on internal reference inaccuracy. The device provides a 1.9-V VCM output for analog input common-mode biasing, eliminating need for external common-mode generation.

How many JESD204B lanes does the ADS42JB69 support, and what are the data rate options?

The ADS42JB69 supports two or four JESD204B lanes. At 250 MSPS sampling rate, it operates at 3.125 Gbps total aggregate rate - meaning 1.5625 Gbps per lane in 2-lane mode or 781.25 Mbps per lane in 4-lane mode. Lane count and subclass mode (0/1/2) are configured via SPI registers.

What is the power consumption of the ADS42JB69 under typical operating conditions?

At TA = +25°C, AVDD = 1.8 V, AVDD3V = 3.3 V, DRVDD = 1.8 V, IOVDD = 1.8 V, and 250 MSPS sampling, the ADS42JB69 consumes 1.96 W total power: 231 mW (analog core), 957 mW (analog buffer), 410 mW (digital logic), and 109 mW (JESD204B output buffer). Global power-down reduces consumption to 160 mW.

Can the ADS42JB69 be used with a single-ended clock input?

Yes, the ADS42JB69 accepts single-ended LVCMOS clock inputs (ac-coupled, 1.5 V amplitude, 35–65% duty cycle) on either CLKINP or CLKINM, with the other pin terminated to AVDD/2. However, differential clocking (LVDS/LVPECL) is strongly recommended to minimize jitter impact on SNR and SFDR performance.