AD524BD Analog Devices Inc, AD524BD Datasheet - Page 21

IC AMP INST 1MHZ PREC LN 16CDIP

AD524BD

Manufacturer Part Number
AD524BD
Description
IC AMP INST 1MHZ PREC LN 16CDIP
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD524BD

Rohs Status
RoHS non-compliant
Amplifier Type
Instrumentation
Number Of Circuits
1
Slew Rate
5 V/µs
Gain Bandwidth Product
1MHz
-3db Bandwidth
1MHz
Current - Input Bias
25nA
Voltage - Input Offset
100µV
Current - Supply
3.5mA
Voltage - Supply, Single/dual (±)
±6 V ~ 18 V
Operating Temperature
-25°C ~ 85°C
Mounting Type
Through Hole
Package / Case
16-CDIP (0.300", 7.62mm)
No. Of Amplifiers
5
Input Offset Voltage
100µV
Gain Db Min
1dB
Bandwidth
25MHz
Amplifier Output
Single Ended
Cmrr
115dB
Supply Voltage Range
± 6V To ± 18V
Rohs Compliant
No
Output Type
-
Current - Output / Channel
-

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In many applications, complex software algorithms for autozero
applications are not available. For those applications, Figure 51
provides a hardware solution.
INPUTS
DATA
–V
ZERO PULSE
15
WR
CS
S
GND
V
V
14
13
DD
SS
AD589
16
MSB
LSB
39kΩ
200µs
11
12
13
4
2
8
1
RG
RG
+INPUT
–INPUT
2
AD7524
Figure 50. Software Controllable Offset
15
G = 1000
1
A1
G = 100
3
+V
G = 10
RG
14
16
13
12
11
2
3
1
GND
RG
Figure 51. Autozero Circuit
S
2
V
+
REF
16
1
AD524
–V
A2
+V
1
2
8
7
S
S
OUT1
OUT2
16
13
12
11
2
3
1
C1
AD711
+
10
6
AD524
A3
+V
0.1µF LOW
LEAKAGE
–V
2
3
8
7
S
S
+
9
AD712
+V
+
1/2
8
S
10
A4
6
1
1kΩ
10kΩ
9
AD7510KD
R4
12
5kΩ
R6
11
R3
20kΩ
5
6
9
+
AD712
–V
10
20kΩ
4
1/2
R5
S
V
7
Rev. F | Page 21 of 28
OUT
CH
ERROR BUDGET ANALYSIS
To illustrate how instrumentation amplifier specifications are
applied, review a typical case where an AD524 is required to
amplify the output of an unbalanced transducer. Figure 52
shows a differential transducer, unbalanced by 100 Ω, supplying
a 0 mV to 20 mV signal to an AD524C. The output of the I
feeds a 14-bit ADC with a 0 V to 2 V input voltage range. The
operating temperature range is −25°C to +85°C. Therefore, the
largest change in temperature, ΔT, within the operating range is
from ambient to +85°C (85°C − 25°C = 60°C).
In many applications, differential linearity and resolution are of
prime importance in cases where the absolute value of a variable is
less important than changes in value. In these applications, only
the irreducible errors (45 ppm = 0.004%) are significant. Further-
more, if a system has an intelligent processor monitoring the
analog-to-digital output, the addition of an autogain/autozero
cycle removes all reducible errors and may eliminate the require-
ment for initial calibration. This also reduces errors to 0.004%.
350Ω
350Ω
+10V
350Ω
350Ω
Figure 52. Typical Bridge Application
G = 100
RG
RG
2
1
16
13
12
11
2
3
1
+V
+
8
S
AD524C
–V
4
7
10kΩ
S
5
10
6
9
AD524
0V TO 2V
14-BIT
ADC
F.S.
A

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