Datasheet

3
LT1251/LT1256
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Gain Supply Rejection V
C
= 1.25V, V
S
= ±5V to ±15V ● 0.03 0.10 %/V
External Resistor Gain Pins 5,10 = Open, External 5k Resistors
● 45 55 %
50% Input 1 from Pins 4,11 to Ground, V
C
= 1.25V
SR Slew Rate V
IN
= ±2.5V, V
O
at ±2V, R
L
= 150Ω ● 150 300 V/µs
Control Feedthrough V
C
= 1.25VDC + 2.5V
P-P
at 1kHz 2.5 mV
P-P
Full Power Bandwidth V
O
= 1V
RMS
20 MHz
BW Small-Signal Bandwidth V
S
= ±5V 30 MHz
V
S
= ±15V 40 MHz
Differential Gain (Notes 4,5) Control = 0% or 100% 0.02 %
Control = 25% or 75% 0.90 %
Differential Phase (Notes 4,5) Control = 0% or 100% 0.02 DEG
Control = 25% or 75% 0.55 DEG
THD Total Harmonic Distortion Gain = 100% 0.002 %
Gain = 50% 0.015 %
Gain = 10% 0.4 %
t
r
, t
f
Rise Time, Fall Time 10% to 90%, V
O
= 100mV 11 ns
OS Overshoot V
O
= 100mV 3 %
t
PD
Propagation Delay V
O
= 100mV 10 ns
t
S
Settling Time 0.1%, ∆V
O
= 2V 65 ns
SIG AL A PLIFIER AC CHARACTERISTICS
U
W
0°C ≤ T
A
≤ 70°C, V
S
= ±5V, V
IN
= 1V
RMS
, f = 1kHz, A
VMAX
= 1, R
F1
= R
F2
= 1.5k, V
FS
= 2.5V, I
C
= I
FS
= NULL = Open, Pins 5,10 = GND,
unless otherwise noted.
SIG AL A PLIFIER DC CHARACTERISTICS
U
W
0°C ≤ T
A
≤ 70°C, V
S
= ±5V, V
CM
= 0V, V
FS
= 2.5V, I
C
= I
FS
= NULL = Open, Pins 5,10 = GND, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
Input Offset Voltage Either Input ● 25 mV
Difference Between Inputs ● –3 1 3 mV
Input Offset Voltage Drift 10 µV/°C
I
IN
+
Noninverting Input Bias Current Either Input ● –2.5 0.5 2.5 µA
I
IN
–
Inverting Input Bias Current Either Input ● –30 10 30 µA
Difference Between Inputs ● –1 0.5 1 µA
Inverting Input Bias Current Null Change Null (Pin 6) Open to V
–
● –280 –170 –60 µA
e
n
Input Noise Voltage Density f = 1kHz 2.7 nV/√Hz
+i
n
Noninverting Input Noise Current Density f = 1kHz 1.5 pA/√Hz
–i
n
Inverting Input Noise Current Density f = 1kHz 29 pA/√Hz
R
IN
Input Resistance Either Noninverting Input ● 517 MΩ
C
IN
Input Capacitance Either Noninverting Input ● 1.5 pF
Input Voltage Range V
S
= ±5V ● ±3 ±3.2 V
V
S
= 5V ● 2 3 V
CMRR Common Mode Rejection Ratio V
CM
= –3V to 3V ● 55 61 dB
V
S
= 5V, V
CM
= 2V to 3V, V
O
= 2.5V ● 50 57 dB
Inverting Input Current Common Mode Rejection V
CM
= –3V to 3V ● 0.07 0.25 µA/V
V
S
= 5V, V
CM
= 2V to 3V, V
O
= 2.5V ● 0.17 0.70 µA/V
PSRR Power Supply Rejection Ratio V
S
= ±5V to ±15V ● 70 76 dB
Noninverting Input Current Power Supply Rejection V
S
= ±5V to ±15V ● 30 100 nA/V
Inverting Input Current Power Supply Rejection V
S
= ±5V to ±15V ● 30 200 nA/V