Buf03
Overview
Product sourcing insights & recommendations
The BUF03 is a high-speed monolithic voltage follower, originally manufactured by Analog Devices and now classified as obsolete Analog. While no longer in mass production, it remains a "cult classic" in the high-end audio community for its transparency and high slew rate (up to 300 V/µs) AnalogDiyaudio.
Market Analysis & Trends
- Legacy Status: The BUF03 is now primarily found through specialty distributors or the secondary market (B2B/eBay) for repairs and boutique DIY projects SierraicEbay.
- Industry Alternatives: Analog Devices recommends the AD811 as a modern replacement, while high-performance buffers like the BUF634 from Texas Instruments serve similar high-drive roles in current designs AnalogTi.
- Broad Market Context: The active electronic components market is projected to reach $500.93 billion by 2030, driven by miniaturization and AI integration, shifting away from legacy monolithic buffers toward more integrated System-on-Chip (SoC) solutions GrandviewresearchLinkedin.
I have compiled a list of available buffer ICs and related components found on B2B platforms in the deliverable below.
You can explore modern alternatives and market opportunities for high-speed buffers here:
Buf03 Buffer Ic
Products · Top picks & verified manufacturers
ISL61863DIRZ BOM IC HOT SWAP CTRLR USB 10DFN ISL61863DIRZ
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XY-017 TTL to RS485 Module 485 to Serial UART Level Mutual Conversion 485 Automatic Flow Control Module
Shenzhen Jiayang Electronics Co., Limited🇨🇳CN5 yrs
Module DC 5V 12V SG3525 PWM Controller Module 100HZ-100KHZ Adjustable Frequency Control Board Diy Electronic
Shenzhen Tongze Electronic Technology Co., Ltd.🇨🇳CN3 yrs
Isolated TTL to RS485 Module Serial Port Automatic Reversing High Speed 2Mbps Compatible with 3.3V/5V
Shenzhen Xinliwei Electronics Technology Co., Ltd🇨🇳CN6 yrs
ISL6146BEVAL1Z BOARD EVAL FOR ISL6146
SZ Zhancheng Tech. Co., Ltd.🇨🇳CN11 yrs
Analog AV video to digital USB camera module CVBS to USB chip UVC drive free
Shenzhen Pinkuo Trading Co., Ltd.🇨🇳CN2 yrs
IN STOCK 100% ORIGINAL BRAND NEW EVAL BOARD FOR ISL6146C ISL6146CEVAL1Z
New And Original ISL6146AEVAL1Z BOARD EVAL FOR ISL6146
Ali Kaisheng Century (shenzhen) Electronics Co., Ltd.🇨🇳CN1 yr
2.4ghz Wireless Communication Module Transceiver Pa Lna Programmable Rf Transmitter Nrf24l01
Chengdu Ashining Technology Co., Ltd.🇨🇳CN8 yrs
ADXL345 3-axis Digital Gravity Sensor Acceleration Module Tilt Sensor.
Shenzhen Beast & Lion Technology Co., Ltd.🇨🇳CN1 yr
TTL to RS485 Module RS485 Signal Converter 3V 5.5V Isolated Single Chip Serial Port UART Industrial Grade Module
Shenzhen Eshinede Technology Co., Ltd.🇨🇳CN8 yrs
Huidu HD-WF1 Indoor & Outdoor LED Display Board WiFi Control Card 2020 HD Sign LEDART Colorful HD2020 HDSign LEDART Signboard
Shenzhen Caixin Technology Co., Ltd.verified🇨🇳CN5 yrs
TTL turn RS485 module 485 to serial UART level mutual conversion hardware automatic flow control
Shenzhen Shengdingtong Technology Co., Ltd.verified🇨🇳CN1 yr
MM74HC244N IC BUFFER NON-INVERT 6V 20-PDIP 2026 New Original
Shenzhen Blikai Electronics Co., Ltd.🇨🇳CN3 yrs
74LVC244APW New Original Tri-state Output Octal Buffer IC Package TSSOP-20
Shenzhen Senyx Electronic Technology Co., Ltd.🇨🇳CN1 yr74LVC244APW New Original Tri-state Output Octal Buffer IC Package TSSOP-20
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Sources & References
21 sources cited · Verified industry data & reports
BUF03 Datasheet and Product Info
Analog Devices
The BUF03 is the first very high-speed monolithic voltage follower. Featuring performance previously unobtainable in monolithic unit, it offers combination ...
Buf-03
diyAudio
I believe that it's now an obsolete part. One would need to find an old PMI (Precision Monolithics Incorporated) databook or an Analog Devices ...
Project files: BUF-03 revisited - theslowdiyer - WordPress.com
theslowdiyer
PSU connector has been uprated to a screw clamp type which is easier to work with. Also, there is now only one PSU entry instead of two. The ...
BUF-03 Datasheet(PDF) - Analog Devices
ALLDATASHEET.COM
Part #: BUF-03. Download. File Size: 1MbKbytes. Page: 7 Pages. Description: High-Speed Voltage Follwer/Buffer. Manufacturer: Analog Devices.
BUF-03 buffer IC and it's power supply PCB
thlaudio.com
The BUF-03 is the first very high-speed monolithic voltage follower. Featuring performance previously unobtainable in a monolithic unit.
1 Pieces BUF03BJ High Speed Voltage Follower/Buffer ...
eBay
Find many great new & used options and get the best deals for 1 Pieces BUF03BJ High Speed Voltage Follower/Buffer BUF03 at the best online prices at eBay!