Texas Instruments THS4502CDR

Overview

THS4502CDR from Texas Instruments is a high-performance fully differential amplifier with 370 MHz small-signal bandwidth, 2800 V/µs slew rate, and -95 dBc third-order intermodulation distortion at 30 MHz. It features power-down capability, output common-mode voltage control (VOCM), and supports ±5 V or single 5 V supply operation. It serves as a precision ADC driver in high-speed data acquisition systems.

For engineers reviewing the THS4502CDR datasheet, THS4502CDR pinout, THS4502CDR application, or THS4502CDR equivalent, key selection criteria include its centered input common-mode range, low IMD3 performance up to 40 MHz, VOCM interface flexibility, and thermal derating requirement below +60°C junction temperature.

Technical Context

The THS4502CDR implements a fully differential architecture optimized for signal integrity in high-linearity analog front-ends. Its internal topology enables balanced differential output generation with precise common-mode control via the VOCM pin, supporting both single-ended-to-differential and differential-to-differential conversion without external level-shifting networks.

It operates across wide supply ranges (±5 V, ±7.5 V, or 4.5–15 V single supply) and delivers 52 dB open-loop gain with 70 dB CMRR. The power-down function reduces quiescent current to ≤1.2 mA while maintaining high-impedance inputs and controlled turnoff timing (≤800 ns).

Key Specifications

Pinout & Package

THS4502CDR is packaged in an 8-pin SOIC (D package) with standard pinout and no exposed thermal pad. Pin assignments are validated per TI SLOS352E Rev. October 2011.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fully differential amplifier applications.

Compared with THS4503CDR, THS4502CDR adds power-down control at minor quiescent current penalty; compared with LMH5401RTVT, it trades bandwidth for VOCM programmability and dual-supply operation-making it optimal for precision ADC interfacing below 100 MHz.

Availability

THS4502CDR is available at Aetrix Electronics and suitable for high-speed data acquisition, wireless infrastructure, medical imaging, and test & measurement applications requiring stable component supply and long-term industrial availability.

Supply support for THS4502CDR 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 for industrial, automotive, and communications markets.

The THS4502 product line targets high-fidelity signal conditioning in precision data converters, emphasizing linearity, bandwidth, and flexible common-mode control for demanding ADC interface applications.

FAQ

What is the maximum recommended junction temperature for reliable operation of the THS4502CDR?

The THS4502CDR must not exceed +60°C junction temperature to prevent low-level oscillation. Operation above this threshold is not recommended for new designs. Thermal design must ensure θJA and board layout keep TJ ≤60°C under worst-case ambient and power dissipation conditions. The THS4502CDR datasheet specifies 125°C as maximum for long-term reliability, but oscillation risk begins at 60°C.

How does the VOCM pin function in the THS4502CDR, and what is its input impedance?

The VOCM pin sets the DC common-mode voltage of the differential outputs. It accepts a voltage from 1 V to 4 V (5 V supply) or ±4 V (±5 V supply), with input impedance of 25 kΩ || 1 pF and 180 MHz small-signal bandwidth. The THS4502CDR uses this pin to align output swing with ADC reference midpoints, such as 2.5 V for 5 V supplies, without external resistive dividers.

What are the power-down voltage thresholds for the THS4502CDR under ±5 V supply conditions?

Under ±5 V supply, the THS4502CDR enables operation when PD pin voltage exceeds −2.9 V and disables when PD falls below −4.3 V. This hysteresis prevents chatter near the transition point. In power-down mode, quiescent current drops to ≤1200 µA, and turnoff delay is ≤800 ns. The THS4502CDR maintains high-impedance inputs during disable, avoiding loading of upstream sources.

Can the THS4502CDR operate from a single 5 V supply, and what are the resulting output swing limitations?

Yes, the THS4502CDR supports single 5 V supply operation. With VOCM = 2.5 V, differential output swing is ±2.6 V (min) into 1 kΩ, yielding 5.2 VPP total. Output current drive drops to ≥80 mA into 20 Ω. Small-signal bandwidth decreases to 320 MHz (G = +1), and IMD3 degrades to −62 dBc at 30 MHz. The THS4502CDR remains functional but trades AC performance for supply simplicity.

What is the input common-mode voltage range specification for the THS4502CDR at 25°C and ±5 V supply?

At 25°C and ±5 V supply, the THS4502CDR has a centered input common-mode range of ±4.0 V - meaning VIN+ and VIN− may each swing from −4 V to +4 V relative to ground. This exceeds the supply rails (±5 V) and enables direct connection to rail-to-rail output stages. The THS4502CDR maintains >70 dB CMRR across this range, verified per TI SLOS352E electrical characteristics table.