Texas Instruments ADS42JB46IRGC25

Overview

ADS42JB46 from Texas Instruments is a dual-channel, 14-bit, 160-MSPS analog-to-digital converter with JESD204B serial interface (up to 3.125 Gbps), differential analog input (2 VPP or 2.5 VPP full-scale), 72.9 dBFS SNR at 170 MHz input, and 100 dBc SFDR (non-HD2/HD3) - deployed in microwave I/Q receivers and multimode cellular baseband processing.

For engineers reviewing the ADS42JB46 datasheet, ADS42JB46 pinout, ADS42JB46 application, or ADS42JB46 equivalent, key selection considerations include JESD204B Subclass 0/1/2 compliance, 85 fs rms aperture jitter, dual-channel isolation (100 dB), programmable input full-scale range, and 9-mm × 9-mm QFN-64 package thermal performance (RθJA = 22.9°C/W).

Technical Context

The ADS42JB46 integrates two independent 14-bit ADC cores sharing a common high-linearity analog input buffer with programmable 2 VPP/2.5 VPP full-scale range and 1.9-V common-mode output (VCM). Its internal PLL supports clock division by 1, 2, or 4, enabling flexible system clock architecture design for synchronized multi-ADC systems.

JESD204B interface operates in two- or four-lane configurations with subclass support (0, 1, 2), SYSREF and SYNC~ inputs for deterministic latency control, and internal dithering to maintain >90 dBc SFDR across wide input frequency bands up to 400 MHz (2 VPP mode).

Key Specifications

Pinout & Package

The ADS42JB46 is housed in a thermally enhanced 64-pin VQFN (RGC) package measuring 9.00 mm × 9.00 mm, with exposed thermal pad connected to ground plane for optimal heat dissipation (RθJB = 2.5°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, JESD204B ADC applications.

Compared with ADS42LB49, the ADS42JB46 offers JESD204B lane scalability and deterministic latency at lower power, while ADS42JB69 provides higher resolution within identical timing and packaging constraints - making ADS42JB46 optimal for cost-sensitive, JESD204B-dependent 14-bit wideband receiver designs.

Availability

ADS42JB46 is available at Aetrix Electronics and suitable for microwave I/Q receivers, multimode cellular base stations, radar beamforming systems, and test equipment requiring stable component supply and long-term production continuity.

Supply support for ADS42JB46 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 and embedded processing technologies, with decades of expertise in high-performance data converters for communications and industrial markets.

The ADS42JB46 belongs to TI's high-speed ADC portfolio designed specifically for wireless infrastructure, radar, and instrumentation applications demanding wide bandwidth, high linearity, and deterministic digital interface timing.

FAQ

What is the maximum analog input frequency supported by the ADS42JB46?

The ADS42JB46 supports up to 400 MHz with a 2-VPP full-scale input and up to 250 MHz with a 2.5-VPP full-scale input, as specified in the Recommended Operating Conditions table. This bandwidth enables direct RF sampling in L- and S-band applications without external pre-filtering, leveraging its 900-MHz analog input bandwidth and high linearity.

Does the ADS42JB46 require an external reference voltage?

No, the ADS42JB46 uses an internal reference and does not require an external reference voltage. The device features an integrated analog input buffer with a fixed 1.9-V common-mode output (VCM) and programmable full-scale range (2 VPP or 2.5 VPP), eliminating dependency on external reference components and simplifying system-level calibration.

How many JESD204B lanes does the ADS42JB46 support per channel?

The ADS42JB46 supports two JESD204B lanes per channel (four total), with dedicated differential pairs DA0P/DA0M and DA1P/DA1M for Channel A, and DB0P/DB0M and DB1P/DB1M for Channel B. This configuration enables 3.125-Gbps aggregate data rate per channel while maintaining deterministic latency alignment via SYSREF or SYNC~.

What is the power consumption of the ADS42JB46 at 160 MSPS?

At 160 MSPS with typical supply conditions (AVDD = 1.8 V, AVDD3V = 3.3 V, DRVDD = 1.8 V, IOVDD = 1.8 V), the ADS42JB46 consumes 679 mW per channel, totaling 1.36 W. Power breakdown includes 162 mW analog core, 772 mW analog buffer, 313 mW digital logic, and 109 mW JESD204B output drivers.

Can the ADS42JB46 operate in Subclass 2 JESD204B mode?

Yes, the ADS42JB46 fully supports JESD204B Subclass 2 operation using the SYNC~P/SYNC~M inputs to initiate the Initial Lane Alignment Sequence (ILAS). This mode provides deterministic latency without requiring a continuous SYSREF signal, making it ideal for FPGA-based systems where synchronous reset and alignment are managed locally.