5962-9151901MPA Analog Devices Inc, 5962-9151901MPA Datasheet - Page 14

• Manufacturer Part Number: 5962-9151901MPA
• Manufacturer: Analog Devices Inc
• Type: General Purpose Amplifierr

Specifications of 5962-9151901MPA

• Rail/rail I/o Type: No
• Number Of Elements: 2
• Unity Gain Bandwidth Product: 4.7MHz
• Slew Rate: 22V/us
• Common Mode Rejection Ratio: 80dB
• Input Offset Voltage: 750uV
• Input Bias Current: 75pA
• Single Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (typ): ±15V
• Voltage Gain In Db: 122.92dB
• Power Supply Rejection Ratio: 98.42dB
• Power Supply Requirement: Dual
• Shut Down Feature: No
• Single Supply Voltage (min): Not RequiredV
• Single Supply Voltage (max): Not RequiredV
• Dual Supply Voltage (min): ±4.5V
• Dual Supply Voltage (max): ±18V
• Technology: BiFET
• Operating Temp Range: -55C to 125C
• Operating Temperature Classification: Military
• Mounting: Through Hole
• Pin Count: 8
• Package Type: CDIP
• Lead Free Status / Rohs Status: Not Compliant

OP249
As with most JFET input amplifiers, the output of the OP249
can undergo phase inversion if either input exceeds the specified
input voltage range. Phase inversion does not damage the
amplifier, nor does it cause an internal latch-up condition.
Supply decoupling should be used to overcome inductance and
resistance associated with supply lines to the amplifier. A 0.1 μF
and a 10 μF capacitor should be placed between each supply pin
and ground.
OPEN-LOOP GAIN LINEARITY
The OP249 has both an extremely high open-loop gain of
1 kV/mV minimum and constant gain linearity, which enhances its
dc precision and provides superb accuracy in high closed-loop
gain applications. Figure 43 illustrates the typical open-loop
gain linearity—high gain accuracy is assured, even when
driving a 600 Ω load.
OFFSET VOLTAGE ADJUSTMENT
The inherent low offset voltage of the OP249 makes offset
adjustments unnecessary in most applications. However, where
a lower offset error is required, balancing can be performed
with simple external circuitry, as shown in Figure 44 and Figure 45.
Figure 43. Open-Loop Gain Linearity; Variation in Open-Loop Gain Results in
100
Errors in High Closed-Loop Gain Circuits; R
0%
90
10
A
V
= 1, Z
50mV
Figure 42. Small-Signal Transient Response,
L
= 2 kΩ||100 pF, No Compensation, V
HORIZONTAL 5V/DIV
OUTPUT CHARGE
VERTICAL 50µV/DIV
INPUT VARIATION
1µs
L
= 600 Ω, V
S
= ±15 V
S
= ±15 V
Rev. G | Page 14 of 20
In Figure 44, the offset adjustment is made by supplying a small
voltage at the noninverting input of the amplifier. Resistors R1
and R2 attenuate the potentiometer voltage, providing a ±2.5 mV
(with V
Figure 45 shows the offset adjustment for the noninverting
amplifier configuration, also providing a ±2.5 mV adjustment
range. As shown in the equations in Figure 45, if R4 is not much
greater than R2, a resulting closed-loop gain error must be
accounted for.
SETTLING TIME
The settling time is the time between when the input signal begins
to change and when the output permanently enters a prescribed
error band. The error bands on the output are 5 mV and 0.5 mV,
respectively, for 0.1% and 0.01% accuracy.
Figure 46 shows the settling time of the OP249, which is typically
870 ns. Moreover, problems in settling response, such as thermal
tails and long-term ringing, are nonexistent.
Figure 45. Offset Adjustment for Noninverting Amplifier Configuration
50kΩ
V
50kΩ
Figure 44. Offset Adjustment for Inverting Amplifier Configuration
R3
100
IN
0%
R5
90
10
+V
–V
+V
–V
S
Figure 46. Settling Characteristics of the OP249 to 0.01%
= ±15 V) adjustment range, referred to the input.
V
200kΩ
IN
R1
10mV
200kΩ
33Ω
R1
R2
R3
31Ω
R2
R4
V
OP249
OS
OP249
1/2
GAIN =
V
R4
ADJUST RANGE = ±V
=
OS
1/2
1 +
R5
ADJUST RANGE = ±V
R5
R4
V
V
OUT
IF R2 << R4
IN
870ns
500ns
= 1 +
R4 + R2
R2
R1
R5
V
OUT
V
R2
R1
OUT