MAXIM INTEGRATED MAX4178 4278 User's Manual and Technical Specifications
Summary
These precision, high-bandwidth closed-loop buffers are designed for demanding signal integrity applications in professional video and broadcast systems. Providing wide bandwidths up to 330MHz, low noise, and a unique hybrid feedback topology allows reliable driving of $50\Omega$ or $75\Omega$ loads perfect for video routing and TV infrastructure. This manual provides detailed coverage of the device’s electrical characteristics, thermal performance across various temperature ranges, package options (including SOT23), and technical specifications required for engineers designing critical high-speed signal links.
Page 1 Text Content
19-0468; Rev 2; 11/99
EVALUATION KIT AVAILABLE 330MHz, Gain of +1/Gain of +2
Closed-Loop Buffers
General Description ____________________________Features
The MAX4178/MAX4278 are ±5V, wide-bandwidth, fast- High Speed settling, closed-loop buffers featuring high slew rate, high 330MHz -3d B Bandwidth (MAX4178) precision, high output current, low noise, and low differen- 310MHz -3d B Bandwidth (MAX4278) tial gain and phase errors. The MAX4178, with a -3d B 250MHz Full-Power Bandwidth (VOUT = 2Vp-p) bandwidth of 330MHz, is preset for unity voltage gain 150MHz 0.1d B Flatness Bandwidth (0d B). The MAX4278 is preset for a voltage gain of +2 1300V/µs Slew Rate (MAX4178) (6d B) and has a 310MHz -3d B bandwidth.
1600V/µs Slew Rate (MAX4278)
The MAX4178/MAX4278 feature the high slew rate and
Low Differential Phase/Gain Error: 0.01°/0.04%
low power that are characteristic of current-mode feed-
8m A Supply Current
back amplifiers. However, unlike conventional current- mode feedback amplifiers, these devices have a 1µA Input Bias Current unique input stage that combines the benefits of cur-
0.5m V Input Offset Voltage
rent-feedback topology with those of the traditional volt-
5n V/√Hz Input-Referred Voltage Noise
age-feedback topology. This combination results in low input offset voltage and bias current, low noise, and 2p A/√Hz Input-Referred Current Noise high gain precision and power-supply rejection.
1.0% Max Gain Error with 100Ω Load
The MAX4178/MAX4278 are ideally suited for driving
Short-Circuit Protected
50Ω or 75Ω loads. They are the perfect choice for high-
speed cable-driving applications, such as video routing. 8000V ESD Protection
The MAX4178/MAX4278 are available in DIP, SO,
Available in Space-Saving SOT23 Package
space-saving µMAX, and SOT23 packages.
________________________Applications
Broadcast and High-Definition TV Systems Ordering Information
Video Switching and Routing
PIN- SOT
PART TEMP. RANGE
High-Speed Cable Drivers PACKAGE TOP MARK
Communications MAX4178EPA -40°C to +85°C 8 Plastic DIP MAX4178ESA -40°C to +85°C 8 SO
Medical Imaging
MAX4178EUA -40°C to +85°C 8 µMAX
Precision High-Speed DAC/ADC Buffers
MAX4178EUK-T -40°C to +85°C 5 SOT23-5 ABYX MAX4178MJA -55°C to +125°C 8 CERDIP Ordering Information continued at end of data sheet.
Pin Configurations Typical Operating Circuit
TOP VIEW
VCCOUT N.C. N.C.
VOUT 75Ω
VCCGND
MAX4278 MAX4178 MAX4178
MAX4278 MAX42783
OUTIN
75Ω 75Ω N.C.VEE
GNDIN
DIP/SO/µMAX
VIDEO/RF CABLE DRIVER SOT23-5
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Page Summary Contents For MAXIM INTEGRATED MAX4178 4278 User's Manual and Technical Specifications
Manual Details
| Brand | Maxim Integrated |
|---|---|
| Pages | 12 |
| File Size | 608.79 KB |
| Published | May 26, 2026 |
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Frequently Asked Questions
What is the bandwidth and gain for the two models?
The MAX4178 has a 330MHz -3dB Bandwidth at unity gain, while the MAX4278 has a 310MHz -3dB Bandwidth with a +2 voltage gain.
What types of loads can these buffers drive?
They are ideally suited for driving short-circuit protected 50Ω or 75Ω loads, perfect for video routing applications.
Are there differences in the operational temperature range?
The MAX4178/MAX4278 general operating temperature is -40°C to +85°C. The specialized MAX4178MJA/MAX4278MJA variant supports -55°C to +125°C.