AD8293G160 Analog Devices, AD8293G160 Datasheet

no-image

AD8293G160

Manufacturer Part Number
AD8293G160
Description
Low Cost, Zero-Drift In-Amp with Filter and Fixed Gain = 160
Manufacturer
Analog Devices
Datasheet

Specifications of AD8293G160

Filter Option
Yes
Common Mode Input (v)min
+1.8V
Common Mode Input (v)max
+5.5V
Bandwidth G=10 (khz Typ)
0.5kHz
Cmrr (db)
140dB
Vcc-vee
1.8V to 5.5V

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD8293G160ARJZ-R7
Manufacturer:
AD
Quantity:
4 519
Part Number:
AD8293G160ARJZ-R7
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
AD8293G160ARJZ-REEL7
Manufacturer:
ADI/亚德诺
Quantity:
20 000
FEATURES
Small package: 8-lead SOT-23
Reduced component count
Low offset voltage: 20 μV maximum
Low offset drift: 0.3 μV/°C maximum
Low gain drift: 25 ppm/°C maximum
High CMR: 140 dB typical
Low noise: 0.7 μV p-p from 0.01 Hz to 10 Hz
Single-supply operation: 1.8 V to 5.5 V
Rail-to-rail output
Available in 2 fixed-gain models
APPLICATIONS
Current sensing
Strain gauges
Laser diode control loops
Portable medical instruments
Thermocouple amplifiers
GENERAL DESCRIPTION
The AD8293G80/AD8293G160 are small, low cost, precision
instrumentation amplifiers that have low noise and rail-to-rail
outputs. They are available in two fixed-gain models: 80 and 160.
They incorporate the gain setting resistors and filter resistors,
reducing the number of ancillary components. For example,
only two external capacitors are needed to implement a 2-pole
filter. The AD8293G80/AD8293G160 also feature low offset
voltage, offset drift, and gain drift coupled with high common-
mode rejection. They are capable of operating on a supply of
1.8 V to 5.5 V.
With a low offset voltage of 20 μV (AD8293G160B), an offset
voltage drift of 0.3 μV/°C, and a voltage noise of only 0.7 μV p-p
(0.01 Hz to 10 Hz), the AD8293G80/AD8293G160 are ideal
for applications where error sources cannot be tolerated.
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.
Trademarks and registered trademarks are the property of their respective owners.
Incorporates gain resistors and filter resistors
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Table 1. AD8293Gxx Models and Gains
Model
AD8293G80
AD8293G160
Precision instrumentation, position and pressure sensors,
medical instrumentation, and strain gauge amplifiers benefit
from the low noise, low input bias current, and high common-
mode rejection. The small footprint and low cost are ideal for
high volume applications.
The small package and low power consumption allow the maxi-
mum channel density and the minimum board size required for
portable systems. Designed for ease of use, these instrumentation
amplifiers, unlike more traditional ones, have a buffered reference,
eliminating the need for an additional op amp to set the reference
voltage to midsupply.
The AD8293G80/AD8293G160 are specified over the industrial
temperature range from −40°C to +85°C. The AD8293G80/
AD8293G160 are available in a halogen-free, Pb-free, 8-lead SOT-23.
LOAD
1.8V
I
8
1
Low Cost, Zero-Drift In-Amp
DC-DC
Figure 2. Measuring Current Using the AD8293G80/AD8293G160
4kΩ
+IN
–IN
R1
R
SHUNT
GND
+V
with Filter and Fixed Gain
AD8293G80/AD8293G160
S
FUNCTIONAL BLOCK DIAGRAM
8
1
0.1µF
7
IN-AMP
2
4kΩ
+IN
–IN
REF
R1
GND
+V
5
3
+5V
S
FILT
7
IN-AMP
2
REF
R2
5
3
FILT
©2008 Analog Devices, Inc. All rights reserved.
6
C2
R2
AD8293Gxx
OUT
5kΩ
R3
6
AD8293Gxx
Figure 1.
OUT
5kΩ
ADC OUT
R3
Gain
80
160
ADC OUT
4
4
C3
OUTPUT TO ADC
WITH ANTIALIASING
FILTER
+3.3V
www.analog.com
ADC
REF
0.1µF
10µF

Related parts for AD8293G160

AD8293G160 Summary of contents

Page 1

... They are capable of operating on a supply of 1 5.5 V. With a low offset voltage of 20 μV (AD8293G160B), an offset voltage drift of 0.3 μV/°C, and a voltage noise of only 0.7 μV p-p (0. Hz), the AD8293G80/AD8293G160 are ideal for applications where error sources cannot be tolerated ...

Page 2

... AD8293G80/AD8293G160 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Electrical Characteristics ............................................................. 3 Absolute Maximum Ratings ............................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution .................................................................................. 5 Pin Configuration and Function Descriptions ............................. 6 Typical Performance Characteristics ............................................. 7 REVISION HISTORY 8/08—Revision 0: Initial Version   Theory of Operation ...................................................................... 10   High PSR and CMR ................................................................... 10   ...

Page 3

... 0.075 V to 4.925 − CC 0.075 0 −40°C ≤ T ≤ +85°C A −40 Rev Page AD8293G80/AD8293G160 AD8293G80A AD8293G160A Typ Max Min Typ 140 94 140 0.7 0 0.02 0.3 0.02 0.4 2 0.4 4 50||1 50||1 10||10 10||10 V − 1.7 0 ...

Page 4

... V to 4.925 − CC 0.075 2 0 100 mA −40°C ≤ T ≤ +85°C A −40 Rev Page AD8293G160B Typ Max Min Typ Max 140 110 140 140 106 140 0.7 0 0.02 0.3 0.02 0.3 0.01 0.5 0.01 0.5 0.4 2 ...

Page 5

... Table 5. Package Type 8-Lead SOT-23 (RJ) 1 θ is specified for the nominal conditions, that is, θ JA device soldered on a circuit board. ESD CAUTION Rev Page AD8293G80/AD8293G160 θ 1 θ Unit JA JC 211.5 91.99 °C/W is specified for the ...

Page 6

... AD8293G80/AD8293G160 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 6. Pin Function Descriptions Pin No. Mnemonic Description 1 −IN Inverting Input Terminal (True Differential Input) 2 GND Ground 3 REF Reference Voltage Terminal (Drive This Terminal to Level-Shift the Output) 4 ADC OUT Output with Series 5 kΩ Resistor for Use with an Antialiasing Filter ...

Page 7

... FILTER = 500Hz 10k 100k 180 160 140 120 100 10k 100k (4.98V, 3.3V) /2 (4.98V, 0V Figure 9. Input Common-Mode Voltage Range vs. Output Voltage 160 Rev Page AD8293G80/AD8293G160 60 V FILTER = 10kHz G = 160 –20 10 100 1k 10k FREQUENCY (Hz) Figure 7. Gain vs. Frequency V = 2.7V, 5V ...

Page 8

... AD8293G80/AD8293G160 10 POWER SUPPLY –5 GAIN = 160 –10 GAIN = 80 –15 –20 –25 –0.2 0 0.2 0.4 0.6 0.8 TIME (ms) Figure 10. Input Offset Voltage vs. Turn-On Time, Filter = 500 Hz 1000 100 GAIN = 0.01 0 100 FREQUENCY (Hz) Figure 11. Voltage Noise Density 160 140 GAIN = 160 120 100 GAIN = 80 80 ...

Page 9

... 80, 160 10kHz FILTER 500Hz FILTER 1ms/DIV Figure 16. Large Signal Step Response AD8293G80/AD8293G160 80, 160 10kHz FILTER 500Hz FILTER Figure 17. Large Signal Step Response Rev Page 1ms/DIV ...

Page 10

... Flicker noise is seen effectively as a slowly varying offset error, which is reduced by the autocorrection topology of the AD8293G80/AD8293G160. This allows the AD8293G80/ AD8293G160 to have lower noise near dc than standard low noise instrumentation amplifiers – ...

Page 11

... REF 2 3 0.1µF 100kΩ Figure 19. AD8293G160 with Antialiasing Filter and Level-Shifted Output (Using the Resistor Divider at the REF Pin, the Output Is Biased at 2.5 V) REFERENCE CONNECTION Unlike traditional 3-op-amp instrumentation amplifiers, parasitic resistance in series with REF (Pin 3) does not degrade CMR performance ...

Page 12

... ESD protection diodes. If such a condition can occur, an external resistor should be used in series with the inputs to limit current for voltages beyond the supply rails. The AD8293G80/AD8293G160 can safely handle continuous current, resulting in an external resistor selection of ...

Page 13

... AD8293G80ARJZ- AD8293G80BRJZ- AD8293G80BRJZ- AD8293G80BRJZ- AD8293G160ARJZ-R2 160 1 AD8293G160ARJZ-R7 160 1 AD8293G160ARJZ-RL 160 1 AD8293G160BRJZ-R2 160 1 AD8293G160BRJZ-R7 160 AD8293G160BRJZ-RL 1 160 RoHS Compliant Part. 2.90 BSC 2.80 BSC 0.65 BSC 1.95 BSC 0.22 1.45 MAX 0.08 0.38 SEATING 0.22 PLANE COMPLIANT TO JEDEC STANDARDS MO-178-BA Figure 22. 8-Lead Small Outline Transistor Package [SOT-23] ...

Page 14

... AD8293G80/AD8293G160 NOTES Rev Page ...

Page 15

... NOTES AD8293G80/AD8293G160 Rev Page ...

Page 16

... AD8293G80/AD8293G160 NOTES ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07451-0-8/08(0) Rev Page ...

Related keywords