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AD8236 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer AD8236
Beschreibung Micropower Instrumentation Amplifier
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 20 Seiten
AD8236 Datasheet, Funktion
40 μA Micropower Instrumentation
Amplifier with Zero Crossover Distortion
AD8236
FEATURES
Low power: 40 μA supply current (maximum)
Low input currents
1 pA input bias current
0.5 pA input offset current
High CMRR: 110 dB CMRR, G = 100
Space-saving MSOP
Zero input crossover distortion
Rail-to-rail input and output
Gain set with single resistor
Operates from 1.8 V to 5.5 V
APPLICATIONS
Medical instrumentation
Low-side current sense
Portable devices
CONNECTION DIAGRAM
–IN 1
RG 2
RG 3
+IN 4
8 +VS
7 VOUT
6 REF
5 –VS
AD8236
TOP VIEW
(Not to Scale)
Figure 1.
5.0
4.5
4.0 G = 5
VS = 5V
3.5 VREF = 2.5V
3.0
2.5
2.0
1.5
G=5
1.0 VS = 1.8V
VREF = 0.9V
0.5
www.DataSheet.co.kr
0
–0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
OUTPUT VOLTAGE (V)
Figure 2. Wide Common-Mode Voltage Range vs. Output Voltage
GENERAL DESCRIPTION
The AD8236 is the lowest power instrumentation amplifier
in the industry. It has rail-to-rail outputs and can operate on
voltages as low as 1.8 V. Its 40 μA maximum supply current
makes it an excellent choice in battery-powered applications.
The AD8236’s high input impedance, low input bias current of
1 pA, high CMRR of 110 dB (G = 100), small size, and low power
offer tremendous value. It has a wider common-mode voltage
range than typical three-op-amp instrumentation amplifiers,
making this a great solution for applications that operate on a
single 1.8 V or 3 V supply. An innovative input stage allows for
a wide rail-to-rail input voltage range without the crossover
distortion common in other designs.
The AD8236 is available in an 8-lead MSOP and is specified
over the industrial temperature range of −40°C to +125°C.
Table 1. Instrumentation Amplifiers by Category1
General
Purpose Zero Drift
Military Low
High Speed
Grade Power PGA
AD8220 AD8230
AD620 AD8236 AD8250
AD8221 AD8231
AD621 AD627 AD8251
AD8222 AD8290
AD624 AD623 AD8253
AD8228 AD8293G80 AD524 AD8223
AD8295 AD8293G160 AD526 AD8226
AD8553
AD8556
AD8557
1 See www.analog.com/inamps for the latest instrumentation amplifiers.
Rev. 0
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2009 Analog Devices, Inc. All rights reserved.
Datasheet pdf - http://www.DataSheet4U.net/






AD8236 Datasheet, Funktion
AD8236
Parameter
Nonlinearity
G=5
G = 10
G = 100
G = 200
Gain vs. Temperature
G=5
G > 10
INPUT
Differential Impedance
Common-Mode Impedance
Input Voltage Range
OUTPUT
Output Voltage High, VOH
Output Voltage Low, VOL
Short-Circuit Limit, ISC
REFERENCE INPUT
RIN
IIN
Voltage Range
Gain to Output
POWER SUPPLY
Operating Range
Quiescent Current
Overtemperature
TEMPERATURE RANGE
For Specified Performance
Test Conditions
RL = 10 kΩ or 100 kΩ
−40°C to +125°C
−40°C to +125°C
RL = 100 kΩ
−40°C to +125°C
RL = 10 kΩ
−40°C to +125°C
RL = 100 kΩ
−40°C to +125°C
RL = 10 kΩ
−40°C to +125°C
−IN, +IN = 0 V
www.DataSheet.co.kr
−40°C to +125°C
1 Although the specifications of the AD8236 list only low to midrange gains, gains can be set beyond 200.
Min Typ
Max Unit
1 10 ppm
1 10 ppm
0.5 10 ppm
0.4 10 ppm
0.25 1 ppm/°C
−50 ppm/°C
440||1.6
GΩ||pF
110||6.2
GΩ||pF
0 +VS V
1.78 1.79
1.78
1.65 1.75
1.65
2
12
±6
V
V
V
V
5 mV
5 mV
25 mV
25 mV
mA
210
20
−VS
1
nA
+VS V
V/V
1.8
33
5.5 V
40 μA
50 μA
−40 +125 °C
Rev. 0 | Page 6 of 20
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6 Page









AD8236 pdf, datenblatt
AD8236
1.8
1.6
(0.03V, 1.533V)
1.4
(1.75V, 1.705V)
1.2
1.0
0.8
0.6
0.4
0.2 (0.03V, 0.103V)
(1.75V, 0.275V)
0
–0.2 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
OUTPUT VOLTAGE (V)
Figure 23. Input Common-Mode Voltage Range vs. Output Voltage,
G = 200, VS = 1.8 V, VREF = 0.9 V
+VS
–0.001
–0.002
–0.003
+125°C
+85°C
+25°C
–40°C
+0.003
+0.002
+0.001
+125°C +85°C +25°C
–40°C
–VS1.8 2.3 2.8 3.3 3.8 4.3 4.8
SUPPLY VOLTAGE (V)
Figure 24. Output Voltage Swing vs. Supply Voltage,
VS = ±0.9 V, ±2.5 V, VREF = 0 V, RL = 100 kΩ Tied to −VS
+VS
–0.1
–0.2 +25°C –40°C
+85°C
–0.3 +125°C
+0.003
+0.002
+0.001
+125°C +85°C +25°C –40°C
–VS 1k
10k
RLOAD ()
Figure 25. Output Voltage Swing vs. Load Resistance,
VS = ±0.9 V, ±2.5 V, VREF = 0 V, RL = 100 kΩ Tied to −VS
100k
444μs TO 0.01%
1ms/DIV
Figure 26. Large Signal Pulse Response and Settling Time,
VS = ±2.5 V, VREF = 0 V, RL = 10 kΩ to VREF
143.2μs TO 0.01%
www.DataSheet.co.kr
1ms/DIV
Figure 27. Large Signal Pulse Response and Settling Time,
VS = ±0.9 V, VREF = 0 V, RL = 10 kΩ to VREF
100µs/DIV
Figure 28. Small Signal Pulse Response, G = 5,
VS = ±2.5 V, VREF = 0 V, RL = 100 kΩ to VREF, CL = 100 pF
Rev. 0 | Page 12 of 20
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