Texas Instruments BUF04701AIPW

Overview

BUF04701AIPW from Texas Instruments is a 4-channel, rail-to-rail input/output CMOS buffer amplifier operating from ±1.75V to ±6V (or +3.5V to +12V single supply), delivering 8MHz bandwidth, 10V/µs slew rate, and 1.1mA quiescent current per channel. It serves as a high-precision voltage reference buffer in TFT-LCD gamma correction circuits, driving heavy resistive loads down to 2kΩ while maintaining output swing within 200mV of rails.

For engineers reviewing the BUF04701AIPW datasheet, BUF04701AIPW pinout, BUF04701AIPW application, or BUF04701AIPW equivalent, key selection criteria include rail-to-rail I/O capability at 12V operation, low quiescent current across –40°C to +125°C, TSSOP-14 pin compatibility with standard quad op amps, and verified performance in LCD reference driver and active filter designs.

Technical Context

The BUF04701AIPW employs complementary N- and P-channel input differential pairs enabling rail-to-rail input common-mode range extending 100mV beyond supplies, with no phase inversion when input current is limited. Its class AB common-source output stage delivers rail-to-rail output swing into 2kΩ loads while sustaining high open-loop gain.

Designed for stability with up to 1000pF capacitive loads, it supports external series output resistance (10–20Ω) to suppress ringing without compromising DC accuracy. The device features diode-clamped inputs, ESD protection, and production-tested specifications over full industrial temperature range.

Key Specifications

Pinout & Package

TSSOP-14 (PW) package: 4.4mm × 5.0mm body, 0.65mm pitch, 1.2mm max height, JEDEC MO-153 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unity-gain buffer applications.

Compared with OPA4743 and TLC084, the BUF04701AIPW uniquely combines rail-to-rail I/O, 125°C operation, and TSSOP-14 pin compatibility-enabling direct retrofit in legacy LCD designs while meeting stringent gamma accuracy and thermal requirements.

Availability

BUF04701AIPW is available at Aetrix Electronics and suitable for TFT-LCD reference buffering, active filter implementation, ADC/DAC reference isolation, notebook power rail monitoring, and electronic book display subsystems requiring stable component supply across industrial and automotive temperature ranges.

Supply support for BUF04701AIPW 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and digital signal processing technologies since 1930.

The BUF04701AIPW belongs to TI's precision high-voltage buffer amplifier product line, engineered specifically for LCD gamma reference buffering and high-fidelity analog signal conditioning in space-constrained, thermally demanding display systems.

FAQ

What is the maximum capacitive load the BUF04701AIPW can drive without external compensation?

The BUF04701AIPW is characterized to drive up to 1000pF pure capacitive load while maintaining stability. For loads exceeding 100pF, TI recommends adding a 10Ω to 20Ω series resistor between the output and capacitive node to reduce ringing and improve settling time. This configuration preserves DC accuracy while enhancing transient response in LCD gamma reference decoupling networks where CL typically reaches 100nF.

Does the BUF04701AIPW support true rail-to-rail input operation across its full temperature range?

Yes, the BUF04701AIPW maintains rail-to-rail input capability from –40°C to +125°C. Its complementary N- and P-channel input stage ensures the common-mode input range extends at least 100mV beyond both supply rails at all temperatures. Input bias current remains ≤±10pA across this range, and no phase inversion occurs when inputs exceed rails-provided input current is limited to ≤10mA using an external series resistor as specified in the datasheet.

Can the BUF04701AIPW replace standard quad op amps in existing TSSOP-14 layouts without PCB modification?

Yes, the BUF04701AIPW uses the TSSOP-14 (PW) package with a pinout matching industry-standard quad op amps: pins 1/7/8/13 correspond to outputs A/B/C/D, and pins 3/5/10/12 to inputs A/B/C/D, with supplies on pins 4 (–V) and 11 (+V). Four NC pins (2, 6, 9, 14) are explicitly designated as no-connect-making BUF04701AIPW a direct layout-compatible upgrade for cost-sensitive LCD display designs.

What is the typical output voltage swing of the BUF04701AIPW into a 2kΩ load at 12V supply?

At +12V single supply (V+ = 12V, V– = 0V), the BUF04701AIPW delivers a typical output swing of 0.15V to 11.85V into a 2kΩ load-i.e., within 150mV of each rail. This is confirmed by datasheet Figure 15 (Output Voltage Swing vs Output Current, sourcing) and Table 1 (Output Voltage Swing from Rail), ensuring ≥11.7V dynamic range for 12V LCD gamma references and maximizing grayscale resolution.

How does the BUF04701AIPW handle input overvoltage conditions beyond the supply rails?

The BUF04701AIPW incorporates ESD diodes that conduct when input voltage exceeds either supply rail by ~300mV. To prevent damage, input current must be limited to ≤10mA-easily achieved with a series resistor (e.g., 1kΩ for ±13V transients). Crucially, the device exhibits no phase inversion under such overvoltage conditions when current-limited, as verified in Figure 4 of the datasheet-a key reliability feature for LCD systems with noisy or unregulated reference sources.