Preliminary Technical Data FEATURES Low noise: 1 nV/√Hz at 1 kHz Low distortion: −105 dB THD @ 20 kHz <80 nV p-p input noise, 0.1 Hz to 10 Hz Slew rate: 16 V/μs Wide bandwidth: 10 MHz Supply current: 4.7 mA typical Low offset voltage: 10 μV typical CMRR: 120 dB Unity-gain stable ±15 V operation APPLICATIONS Professional audio preamplifiers ATE/precision testers Imaging systems Medical/physiological measurements Precision detectors/instruments Precision data conversion Single, Ultralow Distortion, Ultralow Noise Op Amp AD8597 PIN CONFIGURATION Figure 1. 8-Lead SOIC (R-8) 8 NC NC 1 -IN 2 +IN 3 V- 4 TO P VIEW (Not to Scale) 7 V+ 6 OUT 5 NC NC = NO CONNECT Figure 2. 8-LFCSP (3x3)(CP-8) GENERAL DESCRIPTION The AD8597 is a single, very low noise, low distortion operational amplifier ideal for use as a preamplifier. The low noise of 1 nV/√Hz and low harmonic distortion of −105 dB (or better) at audio bandwidths give the AD8597 the wide dynamic range necessary for preamps in audio, medical, and instrumentation applications. The AD8597’s excellent slew rate of 16 V/μs and 10 MHz gain bandwidth make it highly suitable for medical applications. The low distortion and settling time of the AD8597 make it ideal for buffering of high resolution data converters. The AD8597 is available in an 8-Lead SOIC and 8-Lead LFCSP (3x3) packages and is specified over a −40°C to +125°C temperature range. Rev. PrA 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 rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2008 Analog Devices, Inc. All rights reserved. AD8597 Preliminary Technical Data SPECIFICATIONS VS = ±15 V, VCM = 0 V, VO = 0 V, TA = +25°C, unless otherwise specified. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol Conditions Min VOS Typ Max Unit 10 120 180 μV μV 0.8 2.2 μV/°C 25 180 300 180 220 +12.5 nA nA nA nA V dB −40°C ≤ TA ≤ +125°C Offset Voltage Drift ΔVOS/ΔT Input Bias Current IB −40°C ≤ TA ≤ +125°C −40°C ≤ TA ≤ +125°C Input Offset Current IOS Input Voltage Range Common-Mode Rejection Ratio IVR CMRR Large Signal Voltage Gain AVO Input Capacitance CDIFF CCM OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Output Short Circuit Current Closed-Loop Output Impedance POWER SUPPLY Power Supply Rejection Ratio Supply Current per Amplifier VOH VOL ISC ZOUT PSRR 25 −40°C ≤ TA ≤ +125°C VDD = ±15 V −12.5 V ≤ VCM ≤ +12.5 V −12.5 120 −40°C ≤ TA ≤ +125°C RL ≥ 600 Ω, VO = −11 V to +11 V −40°C ≤ TA ≤ +125°C 115 110 106 140 4.8 4.5 RL = 600 Ω −40°C ≤ TA ≤ +125°C RL = 2 kΩ −40°C ≤ TA ≤ +125°C RL = 600 Ω −40°C ≤ TA ≤ +125°C RL = 2 kΩ −40°C ≤ TA ≤ +125°C 13.1 12.8 13.5 13.2 ISY 13.7 −13.2 −13.5 Settling Time Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Peak-to-Peak Noise Voltage Noise Density Current Noise Total Harmonic Distortion + Noise SR ts GBP φM en p-p en THD + N 120 118 140 4.7 AV = −1, RL = 2 kΩ AV = 1, RL = 2 kΩ To 0.01%, step = 10 V 16.8 15 2 10 68 0.1 Hz to 10 Hz f = 1 kHz f = 10 Hz f = 1 kHz G = 1, RL ≥ 1 kΩ, f = 1 kHz, VRMS = 3 V G = 1, RL ≥ 1 kΩ, f = 20 kHz, VRMS = 3 V 76 1.07 Rev. A | Page 2 of 3 −12.9 −12.8 −13.4 −13.3 ±52 5 At 1 MHz, AV = 1 VDD = ±18 V to ±4.5 V −40°C ≤ TA ≤ +125°C 13.4 −40°C ≤ TA ≤ +125°C DYNAMIC PERFORMANCE Slew Rate dB dB dB pf pf 116 1.5 −108 −105 5.7 6.75 V V V V V V V V mA Ω dB dB mA mA V/μs V/μs μs MHz Degrees 1.15 1.5 nV nV/√Hz nV/√Hz pA/√Hz dB dB Preliminary Technical Data AD8597 ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Table 2. Parameter Supply Voltage Input Voltage Differential Input Voltage Output Short-Circuit to GND Storage Temperature Range Operating Temperature Range Lead Temperature Range (Soldering 60 sec) Junction Temperature Rating ±18 V GND to VDD ±1 V Indefinite −65°C to +150°C −40°C to +125°C 300°C 150°C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. θJA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. Table 3. Thermal Resistance Package Type 8-Lead LFCSP (CP-8) 8-Lead SOIC (R-8) θJA TBD 120 θJC TBD 36 Unit °C/W °C/W POWER SEQUENCING The op amp supplies must be established simultaneously with, or before, any input signals are applied. If this is not possible, the input current must be limited to 10 mA. ESD CAUTION Rev. PrA | Page 3 of 3 PR07669-0-7/08(PrA)