Pulse Amplifier - A275

Features

  • Power 15 mW
  • Slew Rate 100 V/µs
  • Input Noise 4 nV/?Hz
  • Stable DC Operation
  • 200 MHz Gain-Bandwidth Product
  • High Reliability Screening
  • Unity Gain Stable

Applications

  • Space Instrumentation
  • Portable Instrumentation
  • Nuclear Instrumentation
  • Precision Active Filter Design
  • Pulse Shaping

Pin Function

a275_2.gif

1 Inverting input
2 Non-inverting Input
3 Bias adjust to Pin 4, (R>3 kohm)
4 -Vs direct
5 -Vs through 50 ohms
6 Compensation to Pin 7, (C = 0-5 pF)
7 Case and Ground
8 Output through 50 ohms
9 Output direct
10 +Vs through 50 ohms
11 + Vs direct
12, 13, 14 Compensation: Leave open for <10; Short for gain >10 gain

Electrical Characteristics

VS = ±6 V, TA = +25 °C

Parameter Symbol Conditions Min Typ Max Units
Input Offset Voltage
Uncompensated/Compensated
VOS 2 5/7 mV
Input Offset Current IOS 0.1 6 µA
Input Bias Current IB 1.5 4 µA
Input Capacitance CIN 4 pF
Differential Input Resistance RIN 44
Common-Mode Input Resistance RIN >5 8
Common-Mode Rejection Ratio CMMR 90 95 dB
Common-Mode Input Range IVR ±4.5 V
Power Supply Rejection Ratio PSRR 60 dB
Large-Signal Voltage Gain
@5kHz
@5kHz
@10MHz
@10MHz

ALFC
ALF
AHFC
AHF

compensated
uncompensated
compensated
uncompensated

64
72
16
24

66
74
20
28
dB
Pulse Risetime (AV = 10) trc
tr
compensated
uncompensated
15
9
22
15
ns
Output Voltage Swing VOP
VON
positive
negative
+4.2
-
+4.4
-5.0

-5.5
V
Open Loop Output Resistance RO 750 Ω
Output Short-Circuit Current IOSC source
sink
11
-4
mA
Slew Rate SRP
SRN
positive
negative
65
35
100
40
V/µs
Input Noise Voltage Density eN 4 nV/?Hz
Supply Current IS ±1.1 ±1.25 ±1.4 mA
Power Consumption PD 15 mW
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