LT1078_15 Datasheet, PDF (10/20 Pages) Linear Technology – Micropower, Dual and Quad, Single Supply, Precision Op Amps

LT1078/LT1079
TYPICAL PERFORMANCE CHARACTERISTICS
Small-Signal Transient Response
V_S = 5V, 0V
Small-Signal Transient Response
V_S = ± 2.5V
0.1V
0V
A_V = 1
10μs/DIV
C_L = 15pF
INPUT 50mV TO 150mV
LT1078/79 • TPC24
A_V = 1
C_L = 15pF
Small-Signal Transient Response
V_S = ± 15V
10μs/DIV
LT1078/79 • TPC25
0V
A_V = 1
C_L = 15pF
10μs/DIV
LT1078/79 • TPC26
APPLICATIONS INFORMATION
The LT1078/LT1079 devices are fully specified with
V ⁺ = 5V, V ^– = 0V, V_CM = 0.1V. This set of operating
conditions appears to be the most representative for
battery-powered micropower circuits. Offset voltage is
internally trimmed to a minimum value at these supply
voltages. When 9V or 3V batteries or ±2.5V dual supplies
are used, bias and offset current changes will be minimal.
Offset voltage changes will be just a few microvolts as
given by the PSRR and CMRR specifications. For example,
if PSRR = 114dB (= 2μV/V), at 9V the offset voltage change
will be 8μV. Similarly, V_S = ±2.5V, V_CM = 0V is equivalent
to a common mode voltage change of 2.4V or a V_OS
change of 7μV if CMRR = 110dB (3μV/V).
A full set of specifications is also provided at ±15V supply
voltages for comparison with other devices and for com-
pleteness.
Single Supply Operation
The LT1078/LT1079 are fully specified for single supply
operation, i.e., when the negative supply is 0V. Input
common mode range goes below ground and the output
swings within a few millivolts of ground while sinking
current. All competing micropower op amps either cannot
swing to within 600mV of ground (OP-20, OP-220, OP-420)
or need a pull-down resistor connected to the output to swing
to ground (OP-90, OP-290, OP-490, HA5141/42/44). This
10789fe
10