AD8429ARZ Analog Devices Inc, AD8429ARZ Datasheet
AD8429ARZ
Specifications of AD8429ARZ
Available stocks
Related parts for AD8429ARZ
AD8429ARZ Summary of contents
Page 1
FEATURES Low noise 1 nV/√Hz input noise 45 nV/√Hz output noise High accuracy dc performance (AD8429BRZ CMRR minimum ( μV maximum input offset voltage 0.02% maximum gain accuracy ( Excellent ac specifications 80 ...
Page 2
AD8429 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Pin Connection Diagram ................................................................ 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 6 Thermal Resistance ...................................................................... 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. ...
Page 3
SPECIFICATIONS V = ± 25° REF A Table 1. Parameter Test Conditions/Comments COMMON-MODE REJECTION RATIO (CMRR) CMRR with 1 kΩ ±10 V ...
Page 4
AD8429 Parameter Test Conditions/Comments Settling Time 0.01 step 100 G = 1000 Settling Time 0.001 step 100 G = 1000 ...
Page 5
Parameter Test Conditions/Comments POWER SUPPLY Operating Range Quiescent Current T = 125°C TEMPERATURE RANGE For Specified Performance Total voltage noise = √( / See the Theory of Operation section for more ...
Page 6
AD8429 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage Output Short-Circuit Current Duration 1 Maximum Voltage at –IN, +IN 1 Differential Input Voltage Gain ≤ > Gain > 50 Gain ≥ 50 Maximum Voltage at REF Storage Temperature ...
Page 7
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 −IN Negative Input Terminal Gain Setting Terminals. Place resistor across the +IN Positive Input Terminal. 5 −V Negative Power ...
Page 8
AD8429 TYPICAL PERFORMANCE CHARACTERISTICS T = 25° ±15 kΩ, unless otherwise noted. S REF ±15V ±12V ±5V ...
Page 9
140 G = 100 120 100 100 1k 10k FREQUENCY (Hz) Figure 10. CMRR vs. Frequency 140 G = 100 ...
Page 10
AD8429 SHORT –10 –20 I SHORT– –30 –40 –50 –40 –25 – TEMPERATURE (°C) Figure 16. Short-Circuit Current vs. Temperature ( –SR 20 +SR ...
Page 11
V = ±15V –5 –10 –15 100 1k 10k LOAD (Ω) Figure 22. Output Voltage Swing vs. Load Resistance + ±15V S –0.4 –0.8 –1.2 –1.6 +2.0 +1.6 +1.2 +0.8 +0.4 –V ...
Page 12
AD8429 100 1k FREQUENCY (Hz) Figure 28. Current Noise Spectral Density vs. Frequency 50pA/DIV Figure 29. 0 Current ...
Page 13
TO 0.01% 6.96µs TO 0.001% 0.002%/DIV TIME (µs) Figure 34. Large Signal Pulse Response and Settling Time (G = 1000 Step ± 50mV/DIV Figure 35. Small Signal Response (G ...
Page 14
AD8429 1400 1200 1000 SETTLED TO 0.001% 800 SETTLED TO 0.01% 600 400 200 STEP SIZE (V) Figure 40. Settling Time vs. Step Size ( LOAD ...
Page 15
THEORY OF OPERATION COMPENSATION + –IN –V S ARCHITECTURE The AD8429 is based on the classic 3-op-amp topology. This topology has two stages: a preamplifier to provide differential amplification followed by a difference amplifier that ...
Page 16
AD8429 For best performance, maintain a source impedance to the REF terminal that is well below 1 Ω. As shown in Figure 46, the reference terminal, REF one end kΩ resistor. Additional impedance at the ...
Page 17
INPUT BIAS CURRENT RETURN PATH The input bias current of the AD8429 must have a return path to ground. When using a floating source without a current return path, such as a thermocouple, create a current return path, as shown ...
Page 18
AD8429 +V S 0.1µ 1nF R +IN 4.02kΩ AD8429 G 10nF R –IN 4.02kΩ 1nF 0.1µF –V S Figure 53. RFI Suppression The filter limits the input signal bandwidth, according to the following ...
Page 19
... OUTLINE DIMENSIONS 0.25 (0.0098) 0.10 (0.0040) COPLANARITY ORDERING GUIDE Model 1 Temperature Range AD8429ARZ −40°C to +125°C AD8429ARZ-R7 −40°C to +125°C AD8429BRZ −40°C to +125°C AD8429BRZ-R7 −40°C to +125° RoHS Compliant Part. 5.00 (0.1968) 4.80 (0.1890 6.20 (0.2441) 4 ...
Page 20
AD8429 NOTES ©2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D09730-0-4/11(0) Rev Page ...