ad8426 Analog Devices, Inc., ad8426 Datasheet
ad8426
Related parts for ad8426
ad8426 Summary of contents
Page 1
... LFCSP package and 125°C temperature rating, the AD8426 thrives in tightly packed, zero airflow designs. The AD8226 is the single channel version of the AD8426. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 ©2011 Analog Devices, Inc. All rights reserved. AD8426 ...
Page 2
... AD8426 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Pin Configuration ............................................................................. 1 General Description ......................................................................... 1 Specifications ..................................................................................... 3 Dual-Supply Operation ............................................................... 3 Single-Supply Operation ............................................................. 5 Absolute Maximum Ratings ............................................................ 8 Thermal Resistance ...................................................................... 8 ESD Caution .................................................................................. 8 Pin Configuration and Function Descriptions ............................. 9 Typical Performance Characteristics ........................................... 10 Theory of Operation ...................................................................... 11 Architecture ................................................................................. 11 Preliminary Technical Data Gain Selection .............................................................................. 11 Reference Terminal ..................................................................... 11 ...
Page 3
... AD8426 Unit nV/√Hz nV/√Hz μV p-p μV p-p μV p-p fA/√Hz pA p-p μV μV/°C μV μV/° pA/° ...
Page 4
... AD8426 Test Conditions/ Parameter Comments T = −40°C A Average Temperature T = −40°C to +125°C A Coefficient REFERENCE INPUT Voltage Range Reference Gain to Output Reference Gain Error DYNAMIC RESPONSE Small-Signal −3 dB Bandwidth 100 G = 1000 Settling Time 0.01 step ...
Page 5
... B Grade Max Min Typ Max 86 105 110 110 100 125 120 125 2 0.5 0.4 100 3 300 150 AD8426 Unit μA μA μA μA °C Unit nV/√Hz nV/√Hz μV p-p μV p-p μV p-p fA/√Hz pA p-p ...
Page 6
... AD8426 Test Conditions/ Parameter Comments Average Temperature T = −40°C to +125°C A Coefficient Output Offset, V OSO Average Temperature T = −40°C to +125°C A Coefficient Offset RTI vs. Supply (PSR 1 100 G = 1000 INPUT CURRENT 1 Input Bias Current T = +25° +125°C ...
Page 7
... S S − 0.9 −0.15 +V − 0 − 40 − − 0.1 0.1 +V − 0 2.2 36 325 400 250 325 425 500 475 550 −40 +125 AD8426 Unit GΩ||pF GΩ|| μA μA μA μA °C ...
Page 8
... AD8426 ABSOLUTE MAXIMUM RATINGS Table 4. Parameter Supply Voltage Output Short-Circuit Current Maximum Voltage at −INx or +INx Minimum Voltage at −INx or +INx REFx Voltage Storage Temperature Range Specified Temperature Range Maximum Junction Temperature ESD Human Body Model Charged Device Model Machine Model Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only ...
Page 9
... Negative Input, In-Amp 2 13 −VS Negative Supply 14 OUT2 Output, In-Amp 2 15 OUT1 Output, In-Amp 1 16 +VS Positive Supply AD8426 12 –IN2 –IN1 1 2 RG2 RG1 11 RG1 3 RG2 10 +IN1 4 9 +IN2 Figure 2. Pin Configuration Rev. PrD | Page AD8426 ...
Page 10
... AD8426 TYPICAL PERFORMANCE CHARACTERISTICS T = 25° ± kΩ, unless otherwise noted 2.50 +0.01, +1.90 +1.35, +1.95 2.00 1.50 +0.01, +1.28 1.00 +2.17, +0.90 0.50 +0.01, +0.31 0.00 ‐0.50 0.00, ‐0.45 +1.35, ‐0.41 ‐1.00 ‐ Output Voltage (V) Figure 3. Input Common-Mode Voltage vs. Output Voltage, Single Supply ...
Page 11
... OUT IN+ IN− REF where: 49.4 kΩ 1 GAIN SELECTION Placing a resistor across the R terminals sets the gain of the G AD8426, which can be calculated by referring to Table using the following gain equation: 49.4 kΩ NODE 4 – ...
Page 12
... Package Considerations ), differential input CM ) interact. The values The AD8426 REF , at different temper- no exposed paddle. The footprint from another 4 mm × LFCSP part should not be copied because it may not have the correct lead pitch and lead width dimensions. Refer to the Outline Dimensions section for the correct dimensions ...
Page 13
... C REF R –V S CAPACITIVELY COUPLED Figure 12. Creating an Input Bias Current Return Path has very robust inputs and typically does not AD8426 terminals should be kept within the AD8426 are protected against ESD. AD8426 CORRECT +V S AD8426 REF – AD8426 REF –V ...
Page 14
... affects the differential signal, and C D mode signal. Values of R and C RFI. Any mismatch between the R × C and the R × C AD8426. By using a value of C than C is improved. Rev. PrD | Page Preliminary Technical Data +V S 0.1µF 10µ 1nF ...
Page 15
... For best linearity and ac performance, a minimum positive supply voltage (+V supply voltage required for optimum performance where V CM_MAX –OUT expected at the input of the AD8426. Table 9. Minimum Positive Supply Voltage Temperature Less than −10°C − −10°C to +25°C IN+ IN− ...
Page 16
... REF AD8616 10nF Figure 16. Driving an ADC Rev. PrD | Page Preliminary Technical Data AD8426 AD8426 stable, the RC time AD8426 needs to AD8426 output stays within the ADC AD8616 simply buffers it. However fault AD8426 may go outside the supply AD8616 and the ADC ...
Page 17
... MAX 0.02 NOM COPLANARITY 0.35 0.08 0.30 0.20 REF 0.25 COMPLIANT TO JEDEC STANDARDS MO-263-VBBC Figure 17. 16-Lead Lead Frame Chips Scale Package [LFCSP_VQ × Body, Very Thin Quad, with Hidden Paddle (CP-16-19) Dimensions shown in millimeters Rev. PrD | Page 1.95 REF BOTTOM VIEW AD8426 ...
Page 18
... AD8426 NOTES Preliminary Technical Data Rev. PrD | Page ...
Page 19
... Preliminary Technical Data NOTES Rev. PrD | Page AD8426 ...
Page 20
... AD8426 NOTES ©2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. PR09490-0-6/11(PrD) Preliminary Technical Data Rev. PrD | Page ...