AD629ARZ Analog Devices Inc, AD629ARZ Datasheet - Page 14
AD629ARZ
Manufacturer Part Number
AD629ARZ
Description
IC AMP DIFF 25MA LDRIFT 8SOIC
Manufacturer
Analog Devices Inc
Type
Differentialr
Specifications of AD629ARZ
Design Resources
Measuring -48 V High-Side Current Using AD629, AD8603, AD780, and AD7453 (CN0100)
Amplifier Type
Differential
Number Of Circuits
1
Slew Rate
2.1 V/µs
-3db Bandwidth
500kHz
Voltage - Input Offset
200µV
Current - Supply
900µA
Current - Output / Channel
25mA
Voltage - Supply, Single/dual (±)
5 V ~ 36 V, ±2.5 V ~ 18 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Bandwidth
500 kHz
Common Mode Rejection Ratio
88
Current, Supply
0.9 mA
Impedance, Thermal
155 °C/W
Package Type
SOIC-8
Temperature, Operating, Range
-55 to +125 °C
Voltage, Gain
1 V/V
Voltage, Input
±300 V
Voltage, Input Offset
0.2 mV
Voltage, Noise
15 μVp-p
Voltage, Output Swing
±10 V
Voltage, Supply
±2.5 to ±18 V
No. Of Amplifiers
1
Input Offset Voltage
1mV
Gain Db Max
1dB
Supply Voltage Range
± 2.5V To ± 18V
Supply Current
900µA
Amplifier Case Style
SOIC
Rohs Compliant
Yes
Number Of Channels
1
Number Of Elements
1
Power Supply Requirement
Dual
Voltage Gain Db
0dB
Input Resistance
0.8@±15VMohm
Single Supply Voltage (typ)
Not RequiredV
Dual Supply Voltage (typ)
±3/±5/±9/±12/±15V
Power Supply Rejection Ratio
84dB
Rail/rail I/o Type
No
Single Supply Voltage (min)
Not RequiredV
Single Supply Voltage (max)
Not RequiredV
Dual Supply Voltage (min)
±2.5V
Dual Supply Voltage (max)
±18V
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Output Type
-
Gain Bandwidth Product
-
Current - Input Bias
-
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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AD629
ERROR BUDGET ANALYSIS EXAMPLE 2
This application is similar to the previous example except
that the sensed load current is from an amplifier with an ac
common-mode component of ±100 V (frequency = 500 Hz)
present on the shunt (see Figure 41). All other conditions are
the same as before. Note that the same kind of power-line
interference can happen as detailed in Example 1. However,
the ac common-mode component of 200 V p-p coming from
the shunt is much larger than the interference of 1 V p-p;
therefore, this interference component can be neglected.
Table 8. AD629 vs. INA117 AC Error Budget Example 2 (V
Error Source
ACCURACY, T
TEMPERATURE DRIFT (85°C)
RESOLUTION
Initial Gain Error
Offset Voltage
Gain
Offset Voltage
Noise, Typical, 0.01 Hz to 10 Hz, μV p-p
CMR, 60 Hz
Nonlinearity
AC CMR @ 500 Hz
A
= 25°C
AD629
(0.0005 × 10)/10 V × 10
(0.001 V/10 V) × 10
10 ppm/°C × 60°C
(20 μV/°C × 60°C) × 10
15 μV/10 V × 10
(141 × 10
(10
(141 × 10
-5
× 10 V)/10 V × 10
-6
-6
× 1 V)/10 V × 10
× 200 V)/10 V × 10
Rev. C | Page 14 of 16
CM
6
= ±100 V @ 500 Hz)
6
6
6
/10 V
6
6
SHUNT
6
CURRENT
1Ω
OUTPUT
Figure 41. Error Budget Analysis Example 2: V
10 AMPS
±100V AC CM
TO GROUND
INA117
(0.0005 × 10)/10 V × 10
(0.002 V/10 V) × 10
Total Accuracy Error
10 ppm/°C × 60°C
(40 μV/°C × 60°C) × 10
Total Drift Error
25 μV/10 V × 10
(500 × 10
(10
(500 × 10
Total Resolution Error
Total Error
POWER LINE
-5
60Hz
× 10 V)/10 V × 10
V
-6
-6
CM
× 1 V)/10 V × 10
× 200 V)/10 V × 10
= ±100 V at 500 Hz, R
–V
S
6
REF (–)
6
+IN
0.1µF
–IN
6
6
/10 V
6
1
2
3
4
NC = NO CONNECT
21.1kΩ
380kΩ
380kΩ
6
6
SHUNT
AD629
380kΩ
20kΩ
=1 Ω
IN
= 10 V Full-Scale,
AD629
500
100
600
600
120
720
2
14
10
2820
2846
4166
Error, ppm of FS
8
7
6
5
NC
REF (+)
INA117
500
200
700
600
240
840
3
50
10
10,000
10,063
11,603
0.1µF
V
OUT
+V
S