Data Sheet

ADA4870

2500 V/μs Slew Rate, High Voltage, 1 A Output Drive Amplifier

Rev. B

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FEATURES

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Ideal for driving high capacitive or low resistive loads

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Wide supply range: 10 V to 40 V

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High output current drive: 1 A

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Wide output voltage swing: 37 V swing with 40 V supply

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High slew rate: 2500 V/µs

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High bandwidth: 52 MHz large signal, 70 MHz small signal

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Low noise: 2.1 nV/√Hz

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Quiescent current: 32.5 mA

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Power down: 0.75 mA

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Short-circuit protection and flag

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Thermal protection

APPLICATIONS

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Envelope tracking

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Power FET driver

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Ultrasound

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Piezo drivers

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PIN diode drivers

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Waveform generation

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Automated test equipment (ATE)

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CCD panel drivers

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Composite amplifiers

FUNCTIONAL BLOCK DIAGRAM

Figure 1.

GENERAL DESCRIPTION

The ADA4870 is a unity gain stable, high speed current feedback

amplifier capable of delivering 1 A of output current and

2500 V/μs slew rate from a 40 V supply. Manufactured using the

Analog Devices, Inc., proprietary high voltage extra fast comple-

mentary bipolar (XFCB) process, the innovative architecture of the

ADA4870 enables high output power, high speed signal processing

solutions in applications that require driving a low impedance load.

The ADA4870 is ideal for driving high voltage power FETs, piezo

transducers, PIN diodes, CCD panels, and a variety of other de-

manding applications that require high speed from high supply

voltage at high output current.

The ADA4870 is available in a 48-lead frame chip scale package

(LFCSP) with an exposed pad that provides high thermal conductiv-

ity, enabling efficient heat transfer for improved performance and

reliability in demanding applications. The ADA4870 operates over

the industrial temperature range (−40°C to +85°C).

Figure 2. Slew Rate, VS = ±20 V, VOUT = 30 V p-p, AV = +2, RF = 1.5 kΩ,

CL = 300 pF, RS = 5 Ω