Datasheet

LT1178/LT1179
3
11789fb
V
S
= 5V, 0V; V
CM
= 0.1V, V
O
= 1.4V, T
A
= 25°C, unless noted.
ELECTRICAL CHARACTERISTICS
LT1178AC/LT1179AC LT1178I/C/S/LT1179I/C/S
SYMBOL PARAMETER CONDITIONS (NOTE 2) MIN TYP MAX MIN TYP MAX UNITS
I
B
Input Bias Current 3 5 3 6 nA
e
n
Input Noise Voltage 0.1Hz to 10Hz (Note 3) 0.9 2.0 0.9 µV
P-P
Input Noise Voltage Density f
O
= 10Hz (Note 3) 50 75 50 nV/√Hz
f
O
= 1000Hz (Note 3) 49 65 49 nV/√Hz
i
n
Input Noise Current 0.1Hz to 10Hz (Note 3) 1.5 2.5 1.5 pAp-p
Input Noise Current Density f
O
= 10Hz (Note 3) 0.03 0.07 0.03 pA/√Hz
f
O
= 1000Hz 0.01 0.01 pA/√Hz
Input Resistance (Note 4)
Differential Mode 0.8 2.0 0.6 2.0 GΩ
Common Mode 12 12 GΩ
Input Voltage Range 3.5 3.9 3.5 3.9 V
0–0.3 0 –0.3 V
CMRR Common Mode Rejection Ratio V
CM
= 0V to 3.5V 93 103 90 102 dB
PSRR Power Supply Rejection Ratio V
S
= 2.2V to 12V 94 104 92 104 dB
A
VOL
Large Signal Voltage Gain V
O
= 0.03V to 4V, No Load 140 700 110 700 V/mV
(Note 4)
V
O
= 0.03V to 3.5V, R
L
= 50k 80 200 70 200 V/mV
Maximum Output Voltage Output Low, No Load 6.5 9 6.5 9 mV
Swing Output Low, 2k to GND 0.2 0.6 0.2 0.6 mV
Output Low, I
SINK
= 100µA 120 160 120 160 mV
Output High, No Load 4.2 4.4 4.2 4.4 V
Output High 2k to GND 3.5 3.8 3.5 3.8 V
SR Slew Rate A
V
= 1, C
L
= 10pF (Note 4) 0.013 0.025 0.013 0.025 V/µs
GBW Gain Bandwidth Product f
O
≤ 5kHz 60 60 kHz
I
S
Supply Current 13 18 14 21 µA
per Amplifier V
S
= ±1.5V, V
O
= 0V 12 17 13 20 µA
Channel Separation ∆V
IN
= 3V, R
L
= 10k 130 130 dB
Minimum Supply Voltage (Note 5) 2.0 2.2 2.0 2.2 V