Texas Instruments ADS61JB23IRHAT

Overview

ADS61JB23IRHAT from Texas Instruments is a 12-bit, 80 MSPS buffered analog-to-digital converter with JESD204A serial output interface, designed for high-frequency IF sampling in wireless infrastructure and test equipment. It delivers 71.7 dBFS SNR at 70 MHz IF, supports 2 Vpp analog input range, and operates from 1.8 V analog/digital supplies with separate 3.3 V input buffer supply.

For engineers reviewing the ADS61JB23IRHAT datasheet, ADS61JB23IRHAT pinout, ADS61JB23IRHAT application, or ADS61JB23IRHAT equivalent, this page provides verified technical context, JESD204A lane configuration options (single/dual), CML output programmability (2–32 mA), power-down modes (440 mW at 80 MSPS), and industrial temperature operation (–40°C to 85°C).

Technical Context

The ADS61JB23IRHAT integrates an on-chip analog input buffer for consistent >480 MHz input bandwidth and stable input impedance, eliminating external driver requirements. Its JESD204A interface supports both single-lane (1.6 Gbps) and dual-lane (800 MBPS per lane) configurations with 8B10B encoding, K28.5 synchronization, and TI TLK-family SERDES compatibility via IEEE 802.3 Clause 36.2.4.12 extension.

It features programmable digital gain (0–6 dB), selectable output format (offset binary/twos complement), internal/external reference selection, and four-level control pins (DFS_EXTREF, MODE) enabling hardware-configurable data format, reference mode, and JESD serialization/scrambling without register writes.

Key Specifications

Pinout & Package

ADS61JB23IRHAT is housed in a thermally enhanced 6 mm × 6 mm QFN-40 package (RHA suffix) with exposed thermal pad connected to DRGND. Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise convention from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS4149IRGZT and AD9628BCPZ-125, the ADS61JB23IRHAT uniquely balances 80 MSPS performance, ultra-low power, hardware-configurable JESD, and integrated buffering - making it optimal for cost- and size-sensitive wireless infrastructure where 71.7 dBFS SNR suffices and rapid bring-up is prioritized.

Availability

ADS61JB23IRHAT is available at Aetrix Electronics and suitable for wireless base station radio units, RF test instrumentation, defense radar digitizers, and medical ultrasound beamformers requiring stable component supply across extended product lifecycles.

Supply support for ADS61JB23IRHAT 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 delivering analog and embedded processing solutions, with decades of expertise in high-speed data converters and signal chain components.

The ADS61JB23IRHAT belongs to TI's precision high-speed ADC portfolio, engineered specifically for JESD204A-equipped wireless infrastructure and instrumentation where low power, small footprint, and deterministic synchronization are critical.

FAQ

What is the maximum analog input frequency supported by the ADS61JB23IRHAT?

The ADS61JB23IRHAT specifies analog input bandwidth of 480 MHz, enabling reliable sampling of IF signals up to 70 MHz with 71.7 dBFS SNR. Its buffered input architecture maintains flat frequency response and stable impedance beyond 100 MHz, supporting undersampling applications for RF bands up to ~250 MHz when used with appropriate anti-alias filtering. The device is not rated for direct RF sampling above its specified AC performance envelope.

Does the ADS61JB23IRHAT require an external reference voltage?

No - the ADS61JB23IRHAT supports both internal (1.95 V VCM output) and external reference modes, selected via the DFS_EXTREF pin or register bit INT_REF_REG. In internal mode, it generates a precise 1.95 V common-mode voltage for the analog inputs; in external mode, it accepts a 1.4 V ±0.1 V reference applied to the VCM pin. No external reference IC is needed unless system-level accuracy demands tighter tolerance than the internal trim provides.

How does the JESD204A interface of the ADS61JB23IRHAT differ from standard JESD204A compliance?

The ADS61JB23IRHAT fully complies with JESD204A but adds IEEE 802.3-2002 Clause 36.2.4.12 idle pattern support (alternating K28.5/D5.6) for seamless interoperability with TI's TLK2711 and TLK2501 SERDES transceivers. This extension is enabled via the IDLE pin or S_IDLE register bit and is not part of the base JESD204A specification - it provides guaranteed compatibility in TI-based high-speed serial backplanes without protocol translation.

Can the ADS61JB23IRHAT operate in dual-lane JESD204A mode without modifying the PCB layout?

Yes - the ADS61JB23IRHAT supports both single-lane and dual-lane JESD204A operation using the same physical pins (ADC_OUTP<0>/ADC_OUTM<0> and ADC_OUTP<1>/ADC_OUTM<1>) and package. Lane configuration is controlled entirely by the MODE and SCLK_SERF0_SCR pins (or register SERF0 bit), requiring no PCB changes. Dual-lane mode halves per-lane data rate to 800 MBPS, easing FPGA transceiver timing closure while maintaining total throughput.

What is the purpose of the DETECT<3:0> outputs on the ADS61JB23IRHAT?

The DETECT<3:0> pins on the ADS61JB23IRHAT provide real-time signal-level information: either a low-latency 4-bit quantized ADC code (for fast AGC loops) or a 16-level RMS power estimate (for overload detection). These outputs update every sample period with no software overhead, enabling hardware-triggered responses such as gain switching or alarm assertion - critical for burst-mode wireless protocols and transient-heavy test scenarios.