AD712AQ Analog Devices Inc, AD712AQ Datasheet - Page 16

• Manufacturer Part Number: AD712AQ
• Description: IC OPAMP BIFET DUAL PREC 8CDIP
• Manufacturer: Analog Devices Inc

Specifications of AD712AQ

• Slew Rate: 20 V/µs
• Rohs Status: RoHS non-compliant
• Amplifier Type: J-FET
• Number Of Circuits: 2
• -3db Bandwidth: 4MHz
• Current - Input Bias: 25pA
• Voltage - Input Offset: 300µV
• Current - Supply: 5mA
• Current - Output / Channel: 25mA
• Voltage - Supply, Single/dual (±): 9 V ~ 36 V, ±4.5 V ~ 20 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 8-CDIP (0.300", 7.62mm)
• Op Amp Type: Precision
• No. Of Amplifiers: 2
• Bandwidth: 4MHz
• Supply Voltage Range: ± 4.5V To ± 18V
• Amplifier Case Style: DIP
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +85°C
• Common Mode Rejection Ratio: 88
• Current, Input Bias: 25 pA
• Current, Input Offset: 10 pA
• Current, Offset, Input: 10 pA (Typ.)
• Current, Output: ±25 mA
• Current, Supply: 5 mA (Typ.)
• Harmonic Distortion: 0.0003 %
• Impedance, Thermal: 22 °C/W
• Number Of Amplifiers: Dual
• Package Type: CDIP-8
• Resistance, Input: 3×10^12 Ohms
• Temperature, Operating, Maximum: 85 °C
• Temperature, Operating, Minimum: -40 °C
• Temperature, Operating, Range: -40 to +85 °C
• Voltage, Input: ±20 V (Differential), -11.5 to +14.5 V (Common-Mode)
• Voltage, Noise: 45 nV/sqrt Hz
• Voltage, Offset: 0.3 mV
• Voltage, Offset, Input: 0.3 mV (Typ.)
• Voltage, Output, High: +13.9 V
• Voltage, Output, Low: -13.3 V
• Voltage, Supply: ±15 V
• Output Type: -
• Gain Bandwidth Product: -
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

AD712
DRIVING A LARGE CAPACITIVE LOAD
The circuit in Figure 46 uses a 100 Ω isolation resistor that enables
the amplifier to drive capacitive loads exceeding 1500 pF; the
resistor effectively isolates the high frequency feedback from
the load and stabilizes the circuit. Low frequency feedback is
returned to the amplifier summing junction via the low-pass filter
formed by the 100 Ω series resistor and the Load Capacitance C
Figure 47 shows a typical transient response for this connection.
TYPICAL CAPACITANCE
LIMIT FOR VARIOUS
LOAD RESISTORS
2kΩ
10kΩ
20Ω
R
1
INPUT
C
1500pF
1500pF
1000pF
1
4.99kΩ
Figure 46. Circuit for Driving a Large Capacitive Load
UP TO
30pF
+
–
AD712
+V
1/2
–V
4.99kΩ
IN
IN
0.1µF
+
–
0.1µF
–
+
100Ω
C1
R1
OUTPUT
Rev. H | Page 16 of 20
L
.
100
90
0%
10
Figure 47. Transient Response R
5V
L
= 2 kΩ, C
1µs
L
= 500 pF