250-mA high-speed buffer - see BUF634A for upgraded version
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Product details
Parameters
We are not able to display this information. Please refer to the product data sheet.Features
- A newer version of this device is now available: BUF634A
- High output current: 250 mA
- Slew rate: 2000 V/µs
- Pin-selected bandwidth: 30 MHz to 180 MHz
- Low quiescent current: 1.5 mA (30 MHz BW)
- Wide supply range: ±2.25 to ±18 V
- Internal current limit
- Thermal shutdown protection
- 8-pin PDIP, SOIC-8, 5-lead TO-220, 5-lead DDPAK-TO-263 surface-mount
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Description
The BUF634 is a high speed, unity-gain open-loop buffer recommended for a wide range of applications. The BUF634 can be used inside the feedback loop of op amps to increase output current, eliminate thermal feedback, and improve capacitive load drive.
For low power applications, the BUF634 operates on 1.5-mA quiescent current with 250-mA output,
2000-V/µs slew rate, and 30-MHz bandwidth. Bandwidth can be adjusted from 30 MHz to 180 MHz by connecting a resistor between V– and the BW Pin.
Output circuitry is fully protected by internal current limit and thermal shut-down, making the device rugged and easy to use.
The BUF634 is available in a variety of packages to suit mechanical and power dissipation requirements. Types include 8-pin PDIP, SOIC-8 surface-mount, 5-lead TO-220, and a 5-lead DDPAK-TO-263 surface-mount plastic power package.
The upgraded device, BUF634A offers a wider bandwidth (210 MHz) and a higher slew rate (3750 V/µs) at 40% lower quiescent current. See the Device Comparison Table for a selection of unity-gain, open-loop buffers from Texas Instruments.
Technical documentation
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View all 11 | Type | Title | Date | |
|---|---|---|---|
| * | Data sheet | BUF634 250-mA High-Speed Buffer datasheet (Rev. B) | Mar. 29, 2019 |
| Application note | Optimizing LCR Meter Front-End Design for Accurate Impedance Measurements | Jan. 20, 2021 | |
| User guide | BUF634AD Evaluation module | Feb. 18, 2019 | |
| Technical article | How to reduce distortion in high-voltage, high-frequency signal generation for AWGs | Oct. 30, 2018 | |
| Technical article | What are the advantages of using JFET-input amplifiers in high-speed applications? | Jun. 19, 2018 | |
| Technical article | Unique active mux capability combines buffer and switch into one solution | Oct. 10, 2017 | |
| E-book | The Signal e-book: A compendium of blog posts on op amp design topics | Mar. 28, 2017 | |
| Technical article | How to minimize filter loss when you drive an ADC | Oct. 20, 2016 | |
| Application note | Combining an Amplifier with the BUF634 | Oct. 02, 2000 | |
| Application note | Add Current Limit to the BUF634 | Sep. 27, 2000 | |
| Application note | Power Amplifier Stress and Power Handling Limitations | Sep. 27, 2000 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
BUF634ADRBEVM
Description
The BUF634ADRBEVM is an evaluation module (EVM) for the BUF634A high-speed buffer in the DRB (8-pin DFN) package. The BUF634ADRBEVM features two BUF634AIDRB devices and is designed to quickly demonstrate the functionality and versatility of the buffer. Optionally, the buffers can be configured as (...)
Features
- Easy evaluation with standard benchtop test equipment
- Includes connections for audio inputs and outputs
- Board has option to form composite loop with dual SOIC op-amp
- Configurable for split or single supply operation
Design tools & simulation
SBOC135C.TSC (405 KB) - TINA-TI Reference Design
SBOM003B.ZIP (62 KB) - PSpice Model
SBOM204B.ZIP (10 KB) - TINA-TI Spice Model
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
TINA-TI — TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
Features
- Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- Noise calculations
- Common unit translation
- Solves common amplifier circuit design problems
- Gain selections using standard resistors
- Filter configurations
- Total noise for common amplifier configurations
- (...)
VOLT-DIVIDER-CALC — VOLT-DIVIDER-CALC quickly determines a set of resistors for a voltage divider. This KnowledgeBase Javascript utility can be used to find a set of resistors for a voltage divider to achieve the desired output voltage. This calculator can also be used to design non-inverting attentuation circuits.
(...)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| DDPAK/TO-263 (KTT) | 5 | View options |
| PDIP (P) | 8 | View options |
| SOIC (D) | 8 | View options |
| TO-220 (KC) | 5 | View options |
Ordering & quality
Information included:
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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