AD8500 Analog Devices, AD8500 Datasheet

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AD8500

Manufacturer Part Number
AD8500
Description
Micropower Precision CMOS Operational Amplifier
Manufacturer
Analog Devices
Datasheet

Specifications of AD8500

-3db Bandwidth
7kHz
Slew Rate
0.0040V/µs
Vos
235µV
Ib
1pA
# Opamps Per Pkg
1
Input Noise (nv/rthz)
190nV/rtHz
Vcc-vee
1.8V to 5.5V
Isy Per Amplifier
0.75µA
Packages
SC70

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD8500AKSZ-REEL7
Manufacturer:
Rohm
Quantity:
3 983
Part Number:
AD8500AKSZ-REEL7
Manufacturer:
ADI/亚德诺
Quantity:
20 000
FEATURES
Supply current: 1 μA maximum
Offset voltage: 1 mV maximum
Single-supply or dual-supply operation
Rail-to-rail input and output
No phase reversal
Unity gain stable
APPLICATIONS
Portable equipment
Remote sensors
Low power filters
Threshold detectors
Current sensing
GENERAL DESCRIPTION
The AD8500 is a low power, precision CMOS op amp featuring
a maximum supply current of 1 μA. The AD8500 has a maximum
offset voltage of 1 mV and a typical input bias current of 1 pA; it
operates rail-to-rail on both the input and output. The AD8500
can operate from a single-supply voltage of +1.8 V to +5.5 V or
a dual-supply voltage of ±0.9 V to ±2.75 V.
With its low power consumption, low input bias current, and
rail-to-rail input and output, the AD8500 is ideally suited for
a variety of battery-powered portable applications. Potential
applications include ECGs, pulse monitors, glucose meters,
smoke and fire detectors, vibration monitors, and backup
battery sensors.
Rev. B
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
Fax: 781.461.3113
The ability to swing rail-to-rail at both the input and output
helps maximize dynamic range and signal-to-noise ratio in
systems that operate at very low voltages. The low offset voltage
allows the AD8500 to be used in systems with high gain without
having excessively large output offset errors, and it provides
high accuracy without the need for system calibration.
The AD8500 is fully specified over the industrial temperature
range (−40°C to +85°C) and is operational over the extended
industrial temperature range (−40°C to +125°C). It is available
in a 5-lead, SC70 surface-mount package.
Table 1. Low Supply Current Op Amps
Supply Current
Single
Dual
Quad
Micropower Precision CMOS
©2006–2009 Analog Devices, Inc. All rights reserved.
Operational Amplifier
OUT A
PIN CONFIGURATION
+IN
V–
Figure 1. 5-Lead SC70
1 μA
AD8500
AD8502
AD8504
1
2
3
(Not to Scale)
AD8500
TOP VIEW
10 μA
ADA4505-2
ADA4505-4
5
4
V+
–IN
AD8500
www.analog.com
20 μA
AD8506
AD8508

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AD8500 Summary of contents

Page 1

... The low offset voltage allows the AD8500 to be used in systems with high gain without having excessively large output offset errors, and it provides high accuracy without the need for system calibration. ...

Page 2

... AD8500 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Pin Configuration ............................................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Electrical Characteristics ............................................................. 3 REVISION HISTORY 2/09—Rev Rev. B Added Table 1; Renumbered Sequentially .................................... 1 Changes to Typical Performance Characteristics Section ........... 6 8/06—Rev Rev. A Updated Format .................................................................. Universal Changes to Figure 17, Figure 18, and Figure 19 ........................... 8 4/06—Revision 0: Initial Version Absolute Maximum Ratings ...

Page 3

... A 2 4.5 4.970 4.995 4.900 4.960 0.85 5 6.5 15 ±5 90 110 80 0.75 1 1.5 2 0.004 190 0.1 AD8500 Unit mV μV/° μA μA μA V/μs kHz Degrees μV p-p nV/√Hz pA/√Hz ...

Page 4

... AD8500 @ 25°C, unless otherwise noted Table 3. Parameter INPUT CHARACTERISTICS Offset Voltage Offset Voltage Drift Input Voltage Range Input Bias Current Input Offset Current Common-Mode Rejection Ratio Large Signal Voltage Gain Input Capacitance OUTPUT CHARACTERISTICS Output Voltage High ...

Page 5

... THERMAL RESISTANCE θ is specified for the worst-case conditions, that is, a device JA soldered in a circuit board for surface-mount packages. Table 5. Thermal Characteristics Package Type 5-Lead SC70 (KS-5) Rev Page AD8500 θ θ Unit JA JC 376 126 °C/W ...

Page 6

... AD8500 TYPICAL PERFORMANCE CHARACTERISTICS T = 25°C, unless otherwise noted. A 1200 1000 800 600 400 200 0 –1000 –750 –500 –250 0 250 V (µV) OS Figure 2. Input Offset Voltage Distribution 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 TCV (µV/°C) OS Figure 3. Input Offset Voltage Drift Distribution 1000 800 ...

Page 7

... Figure 12. Output Saturation Voltage vs. Temperature –20 –40 –60 –80 10 4.0 4.5 5.0 Figure 13. Open-Loop Gain and Phase vs. Frequency Rev Page AD8500 V S SOURCE SINK 0.01 0.1 LOAD CURRENT (mA 10kΩ LOAD OH @ 10kΩ LOAD 100kΩ LOAD OH @ 100kΩ LOAD OL – ...

Page 8

... AD8500 120 100 0.01 0.1 1 FREQUENCY (kHz) Figure 14. CMRR vs. Frequency 100 0.01 0.1 1 FREQUENCY (kHz) Figure 15. PSRR vs. Frequency 100 LOAD CAPACITANCE (pF) Figure 16. Small Signal Overshoot vs. Load Capacitance –0.05 –0.10 –0.15 – ...

Page 9

... S 400 300 200 100 0 –1000 0.007 0.009 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 Figure 25. Input Offset Voltage Drift Distribution Rev Page AD8500 AND 1. 100 1k FREQUENCY (Hz) Figure 23. Voltage Noise Density < V < 1.8V CM –750 –500 –250 0 250 500 750 V (µ ...

Page 10

... AD8500 1000 800 600 400 200 0 –200 –400 –600 –800 –1000 0 0.3 0.6 0.9 V (V) CM Figure 26. Input Offset Voltage vs. Input Common-Mode Voltage 1000 I (+125°C) B 100 (+25°C) B 0.1 0.01 0.001 0 0.3 0.6 0.9 V (V) CM Figure 27. Input Bias Current vs. Input Common-Mode Voltage 0.4 0.5 0.6 0.7 SUPPLY CURRENT (µA) Figure 28 ...

Page 11

... V = 1.8V S 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 1000 –0.002 –0.001 Rev Page AD8500 LOAD 0 0.0005 0.0010 0.0015 TIME (Seconds) Figure 35. Small Signal Transient Response 100pF L 0 0.0005 0.0010 0.0015 TIME (Seconds) Figure 36. Small Signal Transient Response ...

Page 12

... ORDERING GUIDE Model Temperature Range 1 AD8500AKSZ-R2 −40°C to +125°C 1 AD8500AKSZ-REEL −40°C to +125°C 1 AD8500AKSZ-REEL7 −40°C to +125° RoHS Compliant Part. ©2006–2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 2.20 2.00 1.80 2.40 ...

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