Datasheet

3
LT1920
ELECTRICAL CHARACTERISTICS V
S
= ±15V, V
CM
= 0V, T
A
= 25°C, R
L
= 2k, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS (Note 6) MIN TYP MAX UNITS
C
IN(CM)
Common Mode Input Capacitance f
O
= 100kHz 1.6 pF
V
CM
Input Voltage Range G = 1, Other Input Grounded
V
S
= ±2.3V to ±5V –V
S
+ 1.9 +V
S
– 1.2 V
V
S
= ±5V to ±18V –V
S
+ 1.9 +V
S
– 1.4 V
V
S
= ±2.3V to ±5V ● –V
S
+ 2.1 +V
S
– 1.3 V
V
S
= ±5V to ±18V ● –V
S
+ 2.1 +V
S
– 1.4 V
CMRR Common Mode Rejection Ratio 1k Source Imbalance,
V
CM
= 0V to ±10V
G = 1 75 95 dB
G = 10 95 115 dB
G = 100 110 125 dB
G = 1000 110 140 dB
PSRR Power Supply Rejection Ratio V
S
= ±2.3 to ±18V
G = 1 80 120 dB
G = 10 100 135 dB
G = 100 120 140 dB
G = 1000 120 150 dB
I
S
Supply Current V
S
= ±2.3V to ±18V 0.9 1.3 mA
V
OUT
Output Voltage Swing R
L
= 10k
V
S
= ±2.3V to ±5V –V
S
+ 1.1 +V
S
– 1.2 V
V
S
= ±5V to ±18V –V
S
+ 1.2 +V
S
– 1.3 V
V
S
= ±2.3V to ±5V ● –V
S
+ 1.4 +V
S
– 1.3 V
V
S
= ±5V to ±18V ● –V
S
+ 1.6 +V
S
– 1.5 V
I
OUT
Output Current 20 27 mA
BW Bandwidth G = 1 1000 kHz
G = 10 800 kHz
G = 100 120 kHz
G = 1000 12 kHz
SR Slew Rate G = 1, V
OUT
= ±10V 1.2 V/µs
Settling Time to 0.01% 10V Step
G = 1 to 100 14 µs
G = 1000 130 µs
R
REFIN
Reference Input Resistance 20 kΩ
I
REFIN
Reference Input Current V
REF
= 0V 50 µA
V
REF
Reference Voltage Range –V
S
+ 1.6 +V
S
– 1.6 V
A
VREF
Reference Gain to Output 1 ± 0.0001
The ● denotes specifications that apply over the full specified
temperature range.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Does not include the effect of the external gain resistor R
G
.
Note 3: This parameter is not 100% tested.
Note 4: The LT1920C is designed, characterized and expected to meet the
industrial temperature limits, but is not tested at –40°C and 85°C. I-grade
parts are guaranteed.
Note 5: This parameter is measured in a high speed automatic tester that
does not measure the thermal effects with longer time constants. The
magnitude of these thermal effects are dependent on the package used,
heat sinking and air flow conditions.
Note 6: Typical parameters are defined as the 60% of the yield parameter
distribution.