AD623AN Analog Devices Inc, AD623AN Datasheet - Page 16

• Manufacturer Part Number: AD623AN
• Description: IC AMP INST R-R LP 8DIP
• Manufacturer: Analog Devices Inc

Specifications of AD623AN

• Slew Rate: 0.3 V/µs
• Mounting Type: Through Hole
• Rohs Status: RoHS non-compliant
• Amplifier Type: Instrumentation
• Number Of Circuits: 1
• Output Type: Rail-to-Rail
• -3db Bandwidth: 800kHz
• Current - Input Bias: 17nA
• Voltage - Input Offset: 25µV
• Current - Supply: 375µA
• Voltage - Supply, Single/dual (±): 2.7 V ~ 12 V, ± 2.5 V ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• No. Of Amplifiers: 1
• Bandwidth: 0.8MHz
• Amplifier Case Style: DIP
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +85°C
• Programmable Gain Max: 1000
• Current - Output / Channel: -
• Gain Bandwidth Product: -
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

AD623
APPLICATIONS INFORMATION
BASIC CONNECTION
Figure 42 and Figure 43 show the basic connection circuits for
the AD623. The +V
power supply. The supply can be either bipolar (V
±6 V) or single supply (−V
supplies should be capacitively decoupled close to the power pins of
the device. For the best results, use surface-mount 0.1 μF ceramic
chip capacitors and 10 μF electrolytic tantalum capacitors.
Table 5. Required Values of Gain Resistors
Desired Gain
2
5
10
20
33
40
50
65
100
200
500
1000
Figure 43. Single-Supply Basic Connection
V
V
Figure 42. Dual-Supply Basic Connection
IN
IN
R
R
S
0.1µF
0.1µF
0.1µF
G
G
and −V
R
R
R
R
+V
–V
+V
G
G
G
G
S
OUTPUT
OUTPUT
S
= 0 V, +V
S
REF
S
REF
S
+2.5V TO +6V
–2.5V TO –6V
+3V TO +12V
terminals are connected to the
10µF
10µF
10µF
S
= 3.0 V to 12 V). Power
V
REF (INPUT)
V
REF (INPUT)
OUT
OUT
1% Standard Table Value of R
100 k
24.9 k
11 k
5.23 k
3.09 k
2.55 k
2.05 k
1.58 k
1.02 k
499
200
100
S
= ±2.5 V to
Rev. D | Page 16 of 24
The input voltage, which can be either single-ended (tie either
−IN or +IN to ground), or differential is amplified by the
programmed gain. The output signal appears as the voltage
difference between the OUTPUT pin and the externally applied
voltage on the REF input. For a ground-referenced output, REF
should be grounded.
GAIN SELECTION
The gain of the AD623 is resistor programmed by R
precisely, by whatever impedance appears between Pin 1 and
Pin 8. The AD623 is designed to offer accurate gains using 0.1%
to 1% tolerance resistors. Table 5 shows the required values of
R
are unconnected (R
calculated by
REFERENCE TERMINAL
The reference terminal potential defines the zero output voltage
and is especially useful when the load does not share a precise
ground with the rest of the system. It provides a direct means of
injecting a precise offset to the output. The reference terminal is
also useful when bipolar signals are being amplified because it
can be used to provide a virtual ground voltage. The voltage on
the reference terminal can be varied from −V
G
for the various gains. Note that for G = 1, the R
G
R
(Ω)
G
= 100 kΩ/( G − 1)
G
Calculated Gain Using 1% Resistors
2
5.02
10.09
20.12
33.36
40.21
49.78
64.29
99.04
201.4
501
1001
= ∞). For any arbitrary gain, R
S
to +V
G
terminals
G
G
S
, or more
.
can be