OPA4684

Features: ` MINIMAL BANDWIDTH CHANGE VERSUS GAIN` 170MHz BANDWIDTH AT G = +2` > 120MHz BANDWIDTH TO GAIN > +10` LOW DISTORTION: < 78dBc at 5MHz` HIGH OUTPUT CURRENT: 120mA` SINGLE +5V TO +12V SUPPLY OPERATION` DUAL ±2.5 TO ±6.0V SUPPLY OPERATION` LOW SUPPLY CURRENT: 6.8mA TotalApplication...

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OPA4684 Picture
SeekIC No. : 004438353 Detail

OPA4684: Features: ` MINIMAL BANDWIDTH CHANGE VERSUS GAIN` 170MHz BANDWIDTH AT G = +2` > 120MHz BANDWIDTH TO GAIN > +10` LOW DISTORTION: < 78dBc at 5MHz` HIGH OUTPUT CURRENT: 120mA` SINGLE +5V TO +1...

floor Price/Ceiling Price

Part Number:
OPA4684
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/21

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Product Details

Description



Features:

` MINIMAL BANDWIDTH CHANGE VERSUS GAIN
` 170MHz BANDWIDTH AT G = +2
` > 120MHz BANDWIDTH TO GAIN > +10
` LOW DISTORTION: < 78dBc at 5MHz
` HIGH OUTPUT CURRENT: 120mA
` SINGLE +5V TO +12V SUPPLY OPERATION
` DUAL ±2.5 TO ±6.0V SUPPLY OPERATION
` LOW SUPPLY CURRENT: 6.8mA Total



Application

·LOW-POWER BROADCAST VIDEO DRIVERS
·EQUALIZING FILTERS
·SAW FILTER HIGH-GAIN POST AMPLIFIERS
·MULTICHANNEL SUMMING AMPLIFIERS
·WIDEBAND DIFFERENTIAL CHANNELS
·ANALOG-TO-DIGITAL CONVERTERS (ADC) INPUT DRIVERS
·MULTIPLE POLE ACTIVE FILTERS
·OPA4658 LOW-POWER UPGRADE



Pinout

  Connection Diagram


Specifications

Power Supply ............................................................ ±6.5VDC
Internal Power Dissipation ............... See Thermal Information
Differential Input Voltage .............................................. ±1.2V
Input Voltage Range ........................................................ ±VS
Storage Temperature Range: ID, IDB  ...... 40°C to +125°C
Lead Temperature (soldering, 10s) ............................ +300°C
Junction Temperature (TJ ) ......................................... +175°C
ESD Rating: HBM ............................................................ 2000V
CDM ............................................................................... 1500V



Description

The OPA4684 provides a new level of performance in lowpower, wideband, current-feedback (CFB) amplifiers. This CFBPLUS amplifier is among the first to use an internally closed-loop input buffer stage that enhances performance significantly over earlier low-power CFB amplifiers. While retaining the benefits of very low power operation, this new architecture provides many of the benefits of a more ideal CFB amplifier. The closed-loop input stage buffer gives a very low and linearized impedance path at the inverting input to sense the feedback error current. This improved inverting input impedance retains exceptional bandwidth to much higher gains and improves harmonic distortion over earlier solutions limited by inverting input linearity. Beyond simple high-gain applications, the OPA4684 CFB PLUS amplifier permits the gain setting element to be set with considerable freedom from amplifier bandwidth interaction.

This allows frequency response peaking elements to be added, multiple input inverting summing circuits to have greater bandwidth, and low-power line drivers to meet the demanding requirements of studio cameras and broadcast video. The output capability of the OPA4684 also sets a new mark in performance for low-power current-feedback amplifiers. Delivering a full ±4Vp-p swing on ±5V supplies, the OPA4684 also has the output current to support > ±3V swing into 50Ω. This minimal output headroom requirement is complemented by a similar 1.2V input stage headroom giving exceptional capability for single +5V operation.

The OPA4684's low 6.8mA supply current is precisely trimmed at 25°C. This trim, along with low shift over temperature and supply voltage, gives a very robust design over a wide range of operating conditions.




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