AD8270 AD | Alldatasheet
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Technical content
Precision, Dual-Channel Difference Amplifier Preliminary Technical Data AD8270 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. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights reserved.
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
APPLICATIONS
Instrumentation Amplifier Building Block Level Translator Automatic Test Equipment High Performance Audio Sin/Cos Encoders 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 non- inverting amplifier (G=1.5, 2, or 3). FUNCTIONAL BLOCK DIAGRAM AD8270 5678 13141516 –IN1 –IN1 +IN1 +IN1 REF1 REF2 +VS OUT1 OUT2 –VS –IN2 –IN2 +IN2 +IN2 REF1 REF2 10k 10k 10k 10k 10k 10k 10k 10k 10k 10k 20k 20k 20k 20k Figure 1. AD8270 Dual Difference Amplifier Table 1. Difference Amplifiers by Category with no compromise in performance. +85°C and is fully RoHS compliant.
AD8270 Preliminary Technical Data Rev. PrA | Page 2 of 4 SPECIFICATIONS VS = ±15 V , VREF = 0 V , TA = 25°C, G = 1, RL = 2 kΩ, unless otherwise noted. Table 2. G = 1/2 G = 1 G = 2 Parameter Conditions Min Typ Max Min Typ Max Min Typ Max Unit DYNAMIC PERFORMANCE Bandwidth 15 10 5 MHz Slew Rate 30 30 30 V/μs Settling Time to 0.01% 10V Step on output 700 800 850 ns Settling Time to 0.001% 10V Step on output 800 900 950 ns NOISE/DISTORTION Harmonic Distortion f = 1 kHz, V OUT= 20 Vpp 100 100 100 dBc f = 10 kHz, V OUT= 20 Vpp 100 100 100 dBc f = 100 kHz, V OUT= 20 Vpp 90 90 90 dBc Output Voltage Noise (referred to input) f = 0.1 Hz to 10 Hz μV p-p f = 1 kHz 45 30 16 nV/√Hz G A I N Gain Error 0.05 0.05 0.05 % Gain Drift 1 10 1 10 1 10 ppm/°C Gain Nonlinearity 10 40 10 40 10 40 ppm INPUT CHARACTERISTICS Offset 100 400 100 400 100 400 μV Overtemperature μV Drift 2 8 2 8 2 8 μV/°C Common Mode Rejection Ratio DC to 10 kHz 74 94 80 100 86 106 dB Power Supply Rejection Ratio D C t o 1 0 k H z d B I m p e d a n c e Differential 20 20 10 kΩ Common Mode 7.5 10 7.5 kΩ OUTPUT CHARACTERISTICS Output Swing -13.5 -13.5 -13.5 V Short circuit current limit 60 60 60 mA P O W E R S U P P L Y Supply Current (per Amplifier) 2.5 3 2.5 3 2.5 3 mA -40°C<T A<85°C 3 4 3 4 3 4 mA
Preliminary Technical Data AD8270 Rev. PrA | Page 3 of 4
COMPLIANT TOJEDEC STANDARDS MO-220-VGGC.
0.60 MAX PIN 1
1.95 BCS
0.25 MIN
0.65 TYP
0.05 MAX
0.02 NOM
0.20 REF
Figure 2. 16-Lead Lead Frame Chip Scale Package [LFCSP_VQ] registered trademarks are the prop erty of their respective owners.