Texas Instruments ADS6145IRHBT REEL

Overview

ADS6145IRHBT REEL from Texas Instruments is a 14-bit, 125 MSPS analog-to-digital converter with DDR LVDS and parallel CMOS outputs, internal reference, programmable coarse/fine gain, and clock duty cycle stabilizer. It delivers 73.7 dBFS SINAD at 10 MHz input and 78 dBc SFDR at 170 MHz with 3.5 dB gain, targeting high-speed data acquisition in radar and software-defined radio systems.

For engineers reviewing the ADS6145IRHBT REEL datasheet, ADS6145IRHBT REEL pinout, ADS6145IRHBT REEL application, or ADS6145IRHBT REEL equivalent, key selection criteria include its 125 MSPS sampling rate, 32-pin QFN package, LVDS/CMOS interface flexibility, 3.3-V analog / 1.8–3.3-V digital supply compatibility, and industrial temperature range (–40°C to 85°C).

Technical Context

The ADS6145IRHBT REEL integrates a high-bandwidth sample-and-hold circuit and low-jitter clock buffer to maintain 73.7 dBFS SINAD and 90 dBc SFDR at 10 MHz input. Its dual-output architecture supports either DDR LVDS (3.3 V DRVDD, 100 Ω load) or parallel CMOS (1.8–3.3 V DRVDD), with programmable output clock position and drive strength for timing margin optimization.

Configuration is achieved via 3-wire serial interface (SCLK/SEN/SDATA) or dedicated parallel pins (SCLK/SEN/PDN) for power-up state control. Internal reference eliminates external decoupling; external reference mode is supported with VCM = 1.45–1.55 V. Clock inputs accept sine, LVCMOS, LVPECL, or LVDS with amplitude down to 400 mVPP.

Key Specifications

Pinout & Package

ADS6145IRHBT REEL is housed in a 32-pin QFN package (5 mm × 5 mm) with exposed thermal pad. Pin functions are validated per TI SLWS198B datasheet Figure 1 and Table 1–3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS6144IRHBT and ADS6125IRHBT, the ADS6145IRHBT REEL provides the highest sampling rate and resolution in the ADS614X family, enabling wider instantaneous bandwidth and improved SNR for demanding radar and wideband communications systems.

Availability

ADS6145IRHBT REEL is available at Aetrix Electronics and suitable for radar systems, software-defined radio infrastructure, and power amplifier linearization requiring stable component supply, long-term production continuity, and guaranteed industrial temperature grade performance.

Supply support for ADS6145IRHBT REEL 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 ADS614X product line was designed for high-speed, high-resolution digitization in RF and IF signal chains, emphasizing low power, flexible output interfaces, and robust operation across industrial temperatures.

FAQ

What is the maximum sampling rate supported by the ADS6145IRHBT REEL?

The ADS6145IRHBT REEL supports a maximum sampling rate of 125 MSPS, as specified in the TI SLWS198B datasheet. This rate is achievable with proper clock conditioning, 50% duty cycle stabilization, and adherence to recommended operating conditions including AVDD = 3.3 V and DRVDD = 3.3 V for LVDS mode. At this rate, the device maintains 73.7 dBFS SINAD and 90 dBc SFDR at 10 MHz input frequency.

Does the ADS6145IRHBT REEL require external decoupling capacitors for its internal reference?

No, the ADS6145IRHBT REEL does not require external decoupling capacitors for its internal reference. As confirmed in the TI SLWS198B datasheet Features section and Electrical Characteristics table, the device eliminates traditional reference pins and associated external decoupling. The internal reference (VREFB = 1 V, VREFT = 2 V) is fully self-contained and stable across the industrial temperature range.

Can the ADS6145IRHBT REEL operate with both LVDS and CMOS digital outputs?

Yes, the ADS6145IRHBT REEL supports both DDR LVDS and parallel CMOS digital outputs. Output interface selection is controlled via the SEN pin in parallel mode or register 0x04 in serial mode. LVDS mode requires DRVDD = 3.3 V and supports 100 Ω differential loads; CMOS mode supports DRVDD = 1.8–3.3 V and drives standard logic-level loads up to 10 pF per pin.

What is the purpose of the clock duty cycle stabilizer in the ADS6145IRHBT REEL?

The clock duty cycle stabilizer in the ADS6145IRHBT REEL corrects input clock asymmetry to maintain precise 50% duty cycle at the sampling core, reducing aperture jitter and preserving SNR/SFDR performance. As documented in the TI SLWS198B datasheet, this feature enables robust operation even with input clocks exhibiting 35–65% duty cycle variation, critical for systems using recovered or regenerated clocks.

Is the ADS6145IRHBT REEL pin-compatible with any lower-resolution alternatives?

Yes, the ADS6145IRHBT REEL is pin-compatible with the ADS612X family, specifically ADS6125IRHBT. Both devices use the identical 32-pin QFN (RHB) package with matching pin assignments for power, analog input, clock, digital I/O, and control signals. This allows hardware reuse when migrating between 14-bit and 12-bit resolution requirements without PCB redesign.