5
LT1995
1995fb
SYMBOL PARAMETER CONDITIONS V
SUPPLY
MIN TYP MAX UNITS
V
OS
Input Offset Voltage G = 1 (MS10) ±15V ● 1.2 7.5 mV
Referred to Input (Note 7) G = 1 (DD10) ±15V
● 1.6 13 mV
G = 2 (MS10) ±15V
● 0.9 6 mV
G = 2 (DD10) ±15V
● 1.2 10 mV
G = 4 (MS10) ±15V
● 0.7 5.5 mV
G = 4 (DD10) ±15V
● 0.9 8.5 mV
G = 1 (MS10) ±5V
● 1.1 7.5 mV
G = 1 (DD10) ±5V
● 1.4 13 mV
G = 1 (MS10) ±2.5V
● 1.1 7.5 mV
G = 1 (DD10) ±2.5V
● 1.5 13 mV
V
OS
TC Input Offset Voltage Drift G = 1 (MS10) ±15V ● 10 26 µV/°C
Referred to Input (Note 9) G = 1 (DD10) ±15V
● 10 35 µV/°C
V
OS_OA
Op Amp Input Offset Voltage G = 1 (MS10) ±2.5V, ±5V, ±15V ● 0.6 3.75 mV
(Note 10) G = 1 (DD10) ±2.5V, ±5V, ±15V
● 0.8 6.5 mV
Input Voltage Range G = 1 ±15V ● ±15 ±15.5 V
±5V
● ±5 ±5.5 V
±2.5V
● ±1 ±1.5 V
CMRR Common Mode Rejection Ratio V
CM
= ±15V, G = 1 ±15V ● 62 77 dB
Referred to Input V
CM
= ±15V, G = 2 ±15V ● 68 83 dB
V
CM
= ±15V, G = 4 ±15V ● 72 86 dB
V
CM
= ±5V, G = 1 ±5V ● 61 72 dB
V
CM
= ±1V, G = 1 ±2.5V ● 57 66 dB
PSRR Power Supply Rejection Ratio P1 = M1 = 0V, G = 1, V
S
= ±2.5V to ±15V ● 74 86 dB
V
OUT
Output Voltage Swing R
L
= 1k ±15V ● ±13 ±14 V
R
L
= 500Ω ±15V ● ±12.5 ±13.5 V
R
L
= 500Ω ±5V ● ±3.3 ±4V
R
L
= 500Ω ±2.5V ● ±1.1 ±2V
I
SC
Short-Circuit Current G = 1 ±15V ● ±50 ±105 mA
SR Slew Rate G = –2, V
OUT
= ±12V, P2 = 0V ±15V ● 550 900 V/µs
Measured at V
OUT
= ±10V
I
S
Supply Current G = 1 ±15V ● 8.0 11.0 mA
±5V
● 7.6 10.4 mA
The ● denotes the specifications which apply over the –40°C ≤ T
A
≤ 85°C.
Difference Amplifier Configuration. V
REF
= V
CM
= 0V and unused gain pins are unconnected, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The inputs are protected by diodes connected to V
S
+
and V
S
–
.
If an input goes beyond the supply range, the input current should be
limited to 10mA.
Note 3: A heat sink may be required to keep the junction temperature
below absolute maximum.
Note 4: The LT1995C and LT1995I are guaranteed functional over the
operating temperature range of –40°C to 85°C.
Note 5: The LT1995C is guaranteed to meet specified performance from
0°C to 70°C. The LT1995C is designed, characterized and expected to
meet specified performance from –40°C to 85°C but is not tested or QA
sampled at these temperatures. The LT1995I is guaranteed to meet
specified performance from –40°C to 85°C.
Note 6: Thermal resistance (θ
JA
) varies with the amount of PC board metal
connected to the leads. The specified values are for short traces connected
to the leads. If desired, the thermal resistance can be reduced slightly in
the MS package to about 130°C/W by connecting the used leads to a
larger metal area. A substantial reduction in thermal resistance down to
about 50°C/W can be achieved by connecting the Exposed Pad on the
bottom of the DD package to a large PC board metal area which is either
open-circuited or connected to V
S
–
.
Note 7: Input offset voltage is pulse tested and is exclusive of warm-up
drift. V
OS
and V
OS
TC refer to the input offset of the difference amplifier
configuration. The equivalent input offset of the internal op amp can be
calculated from V
OS_OA
= V
OS
• G/(G +1).
Note 8: Full Power bandwidth is calculated from the slew rate measure-
ment: FPBW = SR/2πV
P
.
Note 9: This parameter is not 100% tested.
Note 10: The input offset of the internal op amp is calculated from the
input offset voltage: V
OS_OA
= V
OS
• G/(G +1).
