Datasheet ADA4805-2-EP (Analog Devices)

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0.4 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplifier Enhanced Product ADA4805-2-EP FEATURES TYPICAL APPLICATIONS CIRCUIT Low input offset voltage: 125 µV (maximum) +7.5V 5V REF Low input offset voltage drift ADA4805-2-EP ADR435 0.4 µV/°C (typical) VDD C2 C3 C4 2.7 µV/°C (maximum) 10µF 0.1µF 100nF Ultralow supply current: 500 µA per amplifier Fully specified at V +7.5V S = 3 V, 5 V, ±5 V High speed performance 0V TO ADA4805-2-EP V REF VDD REF −3 dB bandwidth: 105 MHz IN+ R3 Slew rate: 160 V/µs 20Ω AD7980 IN– Settling time to 0.1%: 35 ns GND C1
010
Rail-to-rail outputs 2.7nF
13741-
Input common-mode range: −VS − 0.1 V to +VS − 1 V
Figure 1. Driving the AD7980 with the ADA4805-2-EP
Low noise: 5.9 nV/√Hz at 100 kHz; 0.6 pA/√Hz at 100 kHz
The Analog Devices, Inc., proprietary extra fast complementary
Low distortion: −102 dBc/−126 dBc HD2/HD3 at 100 kHz Low input bias current: 470 nA (typical)
bipolar (XFCB) process allows both low voltage and low current
Small packaging
noise (5.9 nV/√Hz, 0.6 pA/√Hz). The ADA4805-2-EP operates
8-lead MSOP
over a wide range of supply voltages from ±1.5 V to ±5 V, as well as single 3 V and 5 V supplies, making it ideal for high speed, low
ENHANCED PRODUCT FEATURES
power instruments.
Supports defense and aerospace applications (AQEC standard)
The ADA4805-2-EP is available in an 8-lead MSOP package and is
Extended industrial temperature range (−55°C to +125°C)
rated to work over the extended industrial temperature range of
Controlled manufacturing baseline
−55°C to +125°C. Additional application and technical infor-
1 assembly/test site
mation can be found in the ADA4805-1/ADA4805-2 data sheet.
1 fabrication site 0 Enhanced product change notification INPUT FREQUENCY = 10kHz SNR = 89.4dB Qualification data available upon request –20 THD = 104dB SINAD = 89.3dB –40 APPLICATIONS High resolution, high precision analog-to-digital converter –60 B) d (ADC) drivers ( –80 Battery-powered instrumentation UDE IT L –100 Micropower active filters P AM Portable point of sales terminals –120 Active radio frequency identification (RFID) readers –140 Photomultipliers –160 ADC reference buffers –180 GENERAL DESCRIPTION 0 10 20 30 40 50 60 70 80
102
FREQUENCY (kHz)
13741- The ADA4805-2-EP is a high speed voltage feedback, rail-to-rail Figure 2. FFT Plot for the Circuit Configuration in Figure 1 output amplifier with an exceptional y low quiescent current of 500 µA, making it ideal for low power, high resolution data
Table 1. Complementary ADCs to the ADA4805-2-EP
conversion systems. Despite being low power, this amplifier
Throughput Resolution SNR
provides excellent overal performance. It offers a high bandwidth
Product ADC Power (mW) (MSPS) (Bits) (dB)
of 105 MHz at a gain of +1, a high slew rate of 160 V/µs, and a AD7982 7.0 1 18 98 low input offset voltage of 125 µV (maximum). AD7984 10.5 1.33 18 98.5 AD7980 4.0 1 16 91 AD7685 10 0.25 16 88
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Document Outline FEATURES ENHANCED PRODUCT FEATURES APPLICATIONS GENERAL DESCRIPTION TYPICAL APPLICATIONS CIRCUIT TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ±5 V SUPPLY 5 V SUPPLY 3 V SUPPLY ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS OUTLINE DIMENSIONS ORDERING GUIDE