AD620BRZ Analog Devices Inc, AD620BRZ Datasheet - Page 14
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AD620BRZ
Manufacturer Part Number
AD620BRZ
Description
IC AMP INST LP LN 18MA 8SOIC
Manufacturer
Analog Devices Inc
Type
Instrumentation Ampr
Specifications of AD620BRZ
Design Resources
Low Cost Programmable Gain Instrumentation Amplifier Circuit Using ADG1611 and AD620 (CN0146)
Amplifier Type
Instrumentation
Number Of Circuits
1
Slew Rate
1.2 V/µs
-3db Bandwidth
1MHz
Current - Input Bias
500pA
Voltage - Input Offset
15µV
Current - Supply
900µA
Current - Output / Channel
18mA
Voltage - Supply, Single/dual (±)
4.6 V ~ 36 V, ±2.3 V ~ 18 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Number Of Channels
1
Number Of Elements
1
Power Supply Requirement
Dual
Common Mode Rejection Ratio
80dB
Input Resistance
10000@±15VMohm
Input Offset Voltage
0.05@±15VmV
Input Bias Current
0.001@±15VnA
Single Supply Voltage (typ)
Not RequiredV
Dual Supply Voltage (typ)
15V
Power Dissipation
650mW
Rail/rail I/o Type
No
Single Supply Voltage (min)
Not RequiredV
Single Supply Voltage (max)
Not RequiredV
Dual Supply Voltage (min)
±2.3V
Dual Supply Voltage (max)
±18V
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
8
Package Type
SOIC N
Bandwidth
12 kHz
Current, Input Bias
0.5 nA
Current, Input Offset
0.3 nA
Current, Supply
1.3 mA
Impedance, Thermal
155 °C/W
Temperature, Operating, Range
-40 to +85 °C
Voltage, Gain
1-10000 V/V
Voltage, Input
-13.1 to +13.8 V
Voltage, Input Offset
15 μV
Voltage, Noise
9 nV/sqrt Hz (Input), 72 nV/sqrt Hz (Output)
Voltage, Output Swing
-13.9 to +13.8 V
Voltage, Supply
±2.3 to ±18 V
No. Of Amplifiers
1
Gain Db Min
1dB
Amplifier Output
Single Ended
Cmrr
130dB
Supply Voltage Range
± 2.3V To ± 18V
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Output Type
-
Gain Bandwidth Product
-
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD620BRZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
AD620BRZ-R7
Manufacturer:
AD
Quantity:
20 000
Part Number:
AD620BRZ-REEL
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Company:
Part Number:
AD620BRZ-REEL7
Manufacturer:
PANASONIC
Quantity:
12 000
AD620
Regardless of the system in which it is being used, the AD620
provides greater accuracy at low power and price. In simple
systems, absolute accuracy and drift errors are by far the most
significant contributors to error. In more complex systems
with an intelligent processor, an autogain/autozero cycle will
remove all absolute accuracy and drift errors, leaving only the
resolution errors of gain, nonlinearity, and noise, thus allowing
full 14-bit accuracy.
Table 3. Make vs. Buy Error Budget
Error Source
ABSOLUTE ACCURACY at T
Input Offset Voltage, µV
Output Offset Voltage, µV
Input Offset Current, nA
CMR, dB
DRIFT TO 85°C
Gain Drift, ppm/°C
Input Offset Voltage Drift, µV/°C
Output Offset Voltage Drift, µV/°C
RESOLUTION
Gain Nonlinearity, ppm of Full Scale
Typ 0.1 Hz to 10 Hz Voltage Noise, µV p-p
G = 100, V
(All errors are min/max and referred to input.)
PRECISION BRIDGE TRANSDUCER
R = 350 Ω
R = 350 Ω
S
= ±15 V
.
10V
R = 350 Ω
R = 350 Ω
A
= 25°C
AD620 Circuit Calculation
125 µV/20 mV
1000 µV/100 mV/20 mV
2 nA ×350 Ω/20 mV
110 dB(3.16 ppm) ×5 V/20 mV
(50 ppm + 10 ppm) ×60°C
1 µV/°C × 60°C/20 mV
15 µV/°C × 60°C/100 mV/20 mV
40 ppm
0.28 µV p-p/20 mV
SUPPLY CURRENT = 1.3mA MAX
499 Ω
R
G
Figure 39. Make vs. Buy
AD620A MONOLITHIC
INSTRUMENTATION
AMPLIFIER, G = 100
Rev. G | Page 14 of 20
AD620A
REFERENCE
Note that for the homebrew circuit, the OP07 specifications for
input voltage offset and noise have been multiplied by √2. This
is because a three op amp type in-amp has two op amps at its
inputs, both contributing to the overall input error.
“Homebrew” Circuit Calculation
Total Absolute Error
100 ppm/°C Track × 60°C
Total Drift Error
(0.38 µV p-p × √2)/20 mV
Total Resolution Error
Grand Total Error
(150 µV × √2)/20 mV
((150 µV × 2)/100)/20 mV
(6 nA ×350 Ω)/20 mV
(0.02% Match × 5 V)/20 mV/100
(2.5 µV/°C × √2 × 60°C)/20 mV
(2.5 µV/°C × 2 × 60°C)/100 mV/20 mV
40 ppm
100 Ω **
**DISCRETE 1% RESISTOR, 100ppm/ ° C TRACKING
*0.02% RESISTOR MATCH, 3ppm/ ° C TRACKING
"HOMEBREW" IN-AMP, G = 100
SUPPLY CURRENT = 15mA MAX
OP07D
OP07D
10k Ω **
10k Ω **
AD620
Error, ppm of Full Scale
14,663
10k Ω *
10k Ω *
6,250
7,559
3,600
3,000
7,050
500
791
450
18
40
14
54
OP07D
10k Ω *
Homebrew
10k Ω *
10,607
11,310
10,607
16,757
28,134
6,000
150
500
150
53
40
27
67