LT1102
High Speed, Precision,
JFET Input Instrumentation Amplifier
(Fixed Gain = 10 or 100)
FEATURES
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DESCRIPTIO
Slew Rate: 30V/μs
Gain-Bandwidth Product: 35MHz
Settling Time (0.01%): 3μs
Overdrive Recovery: 0.4μs
Gain Error: 0.05% Max
Gain Drift: 5ppm/°C
Gain Nonlinearity: 16ppm Max
Offset Voltage (Input + Output): 600μV Max
– Drift with Temperature: 2μV/°C
Input Bias Current: 40pA Max
Input Offset Current: 40pA Max
– Drift with Temperature (to 70°C): 0.5pA/°C
The LT
®
1102 is the first fast FET input instrumentation
amplifier offered in the low cost, space saving 8-pin
packages. Fixed gains of 10 and 100 are provided with
excellent gain accuracy (0.01%) and non-linearity (3ppm).
No external gain setting resistor is required.
Slew rate, settling time, gain-bandwidth product,
overdrive recovery time are all improved compared to
competitive high speed instrumentation amplifiers.
Industry best speed performance is combined with
impressive precision specifications: less than 10pA input
bias and offset currents, 180μV offset voltage. Unlike
other FET input instrumentation amplifiers, on the LT1102
there is no output offset voltage contribution to total error,
and input bias currents do not double with every 10°C rise
in temperature. Indeed, at 70°C ambient temperature the
input bias current is only 40pA.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
APPLICATIO S
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Fast Settling Analog Signal Processing
Multiplexed Input Data Acquisition Systems
High Source Impedance Signal Amplification from
High Resistance Bridges, Capacitance Sensors,
Photodetector Sensors
Bridge Amplifier with < 1Hz Lowpass Filtering
TYPICAL APPLICATIO
Wideband Instrumentation Amplifier
with
±150mA
Output Current
V
+
= 15V
6
5
R
7
LT1102
3
4
8
LT1010
OUT
–
1
2
V
–
= – 15V
OUTPUT =
±
10V INTO 75Ω TO 330kHz (R = 50Ω)
±
10V INTO 200Ω TO 330kHz (R = 200Ω)
DRIVES 2.2nF CAP LOAD
GAIN = 10, DEGRADED 0.01% DUE TO LT1010
LT1102 • TA01
5V/DIV
+
BIAS
G = 10
U
Slew Rate
FPO
0.5μs/DIV
FPOLT1102
• TA02
U
U
1102fb
1
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
