AD8205

Preliminary Technical Data FEATURES With no external resistors: Difference Amplifier: Gains: 0.5, 1, 2 Inverting Amplifier: Gains: 0.5, 1, 2 Noninverting Amplifier: Gains: 1.5, 2, 3 Set reference voltage at 0, +Vs/2, or +Vs Excellent AC Specifications 10 MHz bandwidth 30V/μs slew rate Low Distortion -90 dBc @ 100 kHz, 20Vpp, 600 Ω load High Accuracy DC Performance 0.05% gain accuracy 10 ppm gain drift 400 uV offset voltage 80 dB CMRR Two channels in small 4 mm × 4 mm LFCSP Supply current: 2.5 mA per channel Supply range: ±2.5 V to ±18 V Precision, Dual-Channel Difference Amplifier AD8270 FUNCTIONAL BLOCK DIAGRAM OUT1 OUT2 14 +VS 16 15 13 AD8270 –IN1 1 –IN1 2 +IN1 3 +IN1 4 10k 10k 10k 10k 10k 10k 10k 10k 10k –VS 12 –IN2 10k 11 –IN2 10 +IN2 9 +IN2 20k 20k 20k 20k 5 6 7 8 REF1 REF1 REF2 Figure 1. AD8270 Dual Difference Amplifier Table 1. Difference Amplifiers by Category APPLICATIONS Instrumentation Amplifier Building Block Level Translator Automatic Test Equipment High Performance Audio Sin/Cos Encoders Low Distortion AD8270 AD8273 AMP03 High Voltage AD628 AD629 AD8212 Single Supply Uni-directional AD8202 AD8203 REF2 Single Supply Bi-directional AD8205 AD8206 AD8210 GENERAL DESCRIPTION The AD8270 is a low distortion, dual-channel amplifier with internal gain setting resistors. With no external components, it can be configured as a high performance difference amplifier (G=0.5, 1, or 2), inverting amplifier (G=0.5, 1, or 2) or noninverting amplifier (G=1.5, 2, or 3). The AD8270 is the first dual difference amplifier in the small 4 mm × 4mm LFCSP. It requires the same board area as a typical single difference amplifier. The smaller package allows a 2X increase in channel density and a lower cost per channel, all with no compromise in performance. The AD8270 operates on both single and dual supplies and only requires 2.5 mA maximum supply current for both amplifiers. It is specified over the industrial temperature range of −40°C to +85°C and is fully RoHS compliant. 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 ©2007 Analog Devices, Inc. All rights reserved. AD8270 SPECIFICATIONS VS = ±15 V, VREF = 0 V, TA = 25°C, G = 1, RL = 2 kΩ, unless otherwise noted. Table 2. Parameter DYNAMIC PERFORMANCE Bandwidth Slew Rate Settling Time to 0.01% Settling Time to 0.001% NOISE/DISTORTION Harmonic Distortion Conditions Min G = 1/2 Typ Max 15 30 700 800 Min Preliminary Technical Data G=1 Typ 10 30 800 900 Max Min G=2 Typ 5 30 850 950 Max Unit MHz V/μs ns ns 10V Step on output 10V Step on output Output Voltage Noise (referred to input) f = 1 kHz, VOUT= 20 Vpp f = 10 kHz, VOUT= 20 Vpp f = 100 kHz, VOUT= 20 Vpp f = 0.1 Hz to 10 Hz f = 1 kHz 100 100 90 100 100 90 100 100 90 dBc dBc dBc μV p-p nV/√Hz 45 30 16 GAIN Gain Error Gain Drift Gain Nonlinearity INPUT CHARACTERISTICS Offset Overtemperature Drift Common Mode Rejection Ratio Power Supply Rejection Ratio Input Voltage Range Impedance Differential Common Mode OUTPUT CHARACTERISTICS Output Swing -40°C