High Speed, High Voltage, 1 A Output Drive Amplifier Data Sheet ADA4870 FEATURES FUNCTIONAL BLOCK DIAGRAM Ideal for driving high capacitive or low resistive loads Wide supply range: 10 V to 40 V 1 20 V V CC CC High output current drive: 1 A 2 19 TFL V ADA4870 CC Wide output voltage swing: 37 V swing with 40 V supply 3 18 SD V CC High slew rate: 2500 V/s 4 17 ON OUT High bandwidth: 52 MHz large signal, 70 MHz small signal 5 16 NC OUT Low noise: 2.1 nV/Hz 6 15 INP OUT Quiescent current: 32.5 mA 7 14 OUT INN Power down: 0.75 mA 8 13 V OUT EE Short-circuit protection and flag 9 12 V NC EE Current limit: 1.2 A 10 11 V V EE EE Thermal protection Figure 1. APPLICATIONS Envelope tracking Power FET driver Ultrasound Piezo drivers PIN diode drivers Waveform generation Automated test equipment (ATE) CCD panel drivers Composite amplifiers GENERAL DESCRIPTION The ADA4870 is a unity gain stable, high speed current feedback amplifier capable of delivering 1 A of output current 20 4,000 and 2500 V/s slew rate from a 40 V supply. Manufactured V OUT 15 3,000 using the Analog Devices, Inc., proprietary high voltage extra fast complementary bipolar (XFCB) process, the innovative 10 2,000 architecture of the ADA4870 enables high output power, high 5 1,000 speed signal processing solutions in applications that require SLEW RATE driving a low impedance load. 0 0 The ADA4870 is ideal for driving high voltage power FETs, 1,000 5 piezo transducers, PIN diodes, CCD panels, and a variety of 2,000 10 other demanding applications that require high speed from high supply voltage at high output current. 3,000 15 The ADA4870 is available in a power SOIC package (PSOP 3), 20 4,000 featuring an exposed thermal slug that provides high thermal TIME (45ns/DIV) conductivity, enabling efficient heat transfer for improved perfor- Figure 2. Slew Rate, V = 20 V, V = 30 V p-p, A = +2, S OUT V mance and reliability in demanding applications. The ADA4870 R = 1.5 k , C = 300 pF, R = 5 F L S operates over the industrial temperature range (40C to +85C). Rev. 0 Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 2014 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. SLEW RATE (V/s) 12125-001 V (V) OUT 12125-057ADA4870 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Shutdown (SD) ........................................................................... 19 Applications ....................................................................................... 1 Feedback Resistor Selection ...................................................... 19 Functional Block Diagram .............................................................. 1 Capacitive Load Driving ........................................................... 19 General Description ......................................................................... 1 Heat and Thermal Management .............................................. 20 Revision History ............................................................................... 2 Power Dissipation....................................................................... 20 Specifications ..................................................................................... 3 Safe Operating Area ................................................................... 21 20 V Supply ................................................................................. 3 Printed Circuit Board (PCB) .................................................... 22 5 V Supply ................................................................................... 4 Thermal Modeling ..................................................................... 22 Absolute Maximum Ratings ............................................................ 6 Heat Sink Selection .................................................................... 22 Maximum Power Dissipation ..................................................... 6 Power Supplies and Decoupling ............................................... 22 ESD Caution .................................................................................. 6 Composite Amplifier ................................................................. 23 Pin Configuration and Function Descriptions ............................. 7 Outline Dimensions ....................................................................... 24 Typical Performance Characteristics ............................................. 8 Ordering Guide .......................................................................... 24 Applications Information .............................................................. 19 ON , Initial Power-Up, and Short-Circuit ................................ 19 Thermal Protection .................................................................... 19 REVISION HISTORY 5/14Revision 0: Initial Version Rev. 0 Page 2 of 24