LT1187
4
1187fa
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: A heat sink may be required to keep the junction temperature
below absolute maximum when the output is shorted continuously.
Note 3: T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formulas:
LT1187MJ8, LT1187CJ8: T
J
= T
A
+ (P
D
• 100°C/W)
LT1187CN8: T
J
= T
A
+ (P
D
• 100°C/W)
LT1187CS8: T
J
= T
A
+ (P
D
• 150°C/W)
Note 4: When R
L
= 1k is specifi ed, the load resistor is R
FB1
+ R
FB2
, but
when R
L
= 300Ω is specifi ed, then an additional 430Ω is added to the
output such that (R
FB1
+ R
FB2
) in parallel with 430Ω is R
L
= 300Ω.
Note 5: V
OS
measured at the output (Pin 6) is the contribution from both
input pair and is input referred.
±5V ELECTRICAL CHARACTERISTICS
0°C ≤ T
A
≤ 70°C (LT1187C) –40°C ≤ T
A
≤ 85°C (LT1187I) (Note 4)
V
S
= ±5V, V
REF
= 0V, R
FB1
= 900Ω from Pins 6 to 8, R
FB2
= 100Ω from Pin 8 to ground, R
L
= R
FB1
+ R
FB2
= 1k, C
L
≤ 10pF, Pin 5 open.
SYMBOL PARAMETER CONDITIONS MIN
LT1187C/I
TYP MAX UNITS
V
OS
Input Offset Voltage Either Input (Note 5) 2.0 12 mV
ΔV
OS
/ΔT Input V
OS
Drift 9.0 mV/°C
I
OS
Input Offset Current Either Input 0.2 1.5 µA
I
B
Input Bias Current Either Input ±0.5 ±3.5 µA
Input Voltage Range –2.5 3.5 V
CMRR Common Mode Rejection Ratio V
CM
= –2.5V to 3.5V 70 100 dB
PSRR Power Supply Rejection Ratio V
S
= ±2.375V to ±8V 65 85 dB
V
OUT
Output Voltage Swing V
S
= ±5V, R
L
= 1k, A
V
= 50
V
S
= ±8V, R
L
= 1k, A
V
= 50
V
S
= ±8V, R
L
= 300Ω, A
V
= 50 (Note 4)
±3.7
±6.6
±6.4
±4.0
±7.0
±6.8
V
V
V
G
E
Gain Error V
O
= ±1V, A
V
= 10, R
L
= 1k 0.2 1.0 %
I
S
Supply Current 13 17 mA
Shutdown Supply Current Pin 5 at V
–
(Note 12) 0.8 1.5 mA
I
S/D
Shutdown Pin Current Pin 5 at V
–
525 µA
5V ELECTRICAL CHARACTERISTICS
0°C ≤ T
A
≤ 70°C (LT1187C) –40°C ≤ T
A
≤ 85°C (LT1187I) (Note 4)
V
S
+
= 5V, V
S
–
= 0V, V
REF
= 2.5V, R
FB1
= 900Ω from Pins 6 to 8, R
FB2
= 100Ω from Pin 8 to V
REF
, R
L
= R
FB1
+ R
FB2
= 1k, C
L
≤ 10pF, Pin 5
open.
SYMBOL PARAMETER CONDITIONS MIN
LT1187C/I
TYP MAX UNITS
V
OS
Input Offset Voltage Either Input (Note 5)
SO Package
2.0
2.0
12.0
13.0
mV
mV
ΔV
OS
/ΔT Input V
OS
Drift 9.0 µV/°C
I
OS
Input Offset Current Either Input 0.2 1.5 µA
I
B
Input Bias Current Either Input ±0.5 ±3.5 µA
Input Voltage Range 2.0 3.5 V
CMRR Common Mode Rejection Ratio V
CM
= 2.0V to 3.5V 70 100 dB
V
OUT
Output Voltage Swing R
L
= 300Ω to Ground
(Note 4)
V
OUT
High 3.5 4.0 V
V
OUT
Low 0.15 0.4 V
I
S
Supply Current 12 16 mA
Shutdown Supply Current Pin 5 at V
–
(Note 12) 0.8 1.5 mA
I
S/D
Shutdown Pin Current Pin 5 at V
–
525 µA
Note 6: V
IN LIM
is the maximum voltage between –V
IN
and +V
IN
(Pin 2 and
Pin 3) for which the output can respond.
Note 7: Slew rate is measured between ±0.5V on the output, with a V
IN
step of ±0.75V, A
V
= 3 and R
L
= 1k.
Note 8: Full power bandwidth is calculated from the slew rate
measurement: FPBW = SR/2πV
P
.
Note 9: Settling time measurement techniques are shown in “Take the
Guesswork Out of Settling Time Measurements,” EDN, September 19,
1985.
Note 10: NTSC (3.58MHz).
Note 11: AC parameters are 100% tested on the ceramic and plastic DIP
packaged parts (J8 and N8 suffi x) and are sample tested on every lot of
the SO packaged parts (S8 suffi x).
Note 12: See Application section for shutdown at elevated temperatures.
Do not operate shutdown above T
J
> 125°C.
