LT2078IS8 Linear Technology, LT2078IS8 Datasheet - Page 12

• Manufacturer Part Number: LT2078IS8
• Description: IC OPAMP MICROPOWER DUAL 8-SOIC
• Manufacturer: Linear Technology

Specifications of LT2078IS8

• Amplifier Type: General Purpose
• Number Of Circuits: 2
• Slew Rate: 0.1 V/µs
• Gain Bandwidth Product: 200kHz
• Current - Input Bias: 6nA
• Voltage - Input Offset: 70µV
• Current - Supply: 47µA
• Voltage - Supply, Single/dual (±): 2.2 V ~ 36 V, ±1.1 V ~ 18 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Output Type: -
• Current - Output / Channel: -
• -3db Bandwidth: -

LT2078/LT 2079
the individual characteristics of the two devices, the two
and three op amp instrumentation amplifier configura-
tions shown in this data sheet are examples. Matching
characteristics are not 100% tested on the LT2078/LT2079.
Some specifications are guaranteed by definition. For
example, 70 V maximum offset voltage implies that mis-
match cannot be more than 140 V. 95dB (= 17.5 V/V)
CMRR means that worst-case CMRR match is 89dB
(= 35 V/V). However, Table 1 can be used to estimate the
12
APPLICATIONS
TYPICAL APPLICATIONS
LT1034BC-1.2
160k
1%
THE LT2078 CONTRIBUTES LESS THAN 3% OF THE TOTAL OUTPUT NOISE AND
DRIFT WITH TIME AND TEMPERATURE. THE ACCURACY OF THE –5V OUTPUT
DEPENDS ON THE MATCHING OF THE TWO 1M RESISTORS
–100
Micropower, 10ppm/ C, 5V Reference
120k
20k
4
2
0
0
V
220k
Figure 3. Comparator Rise Response
Time to 10mV, 5mV, 2mV Overdrives
2M
S
3
2
= 5V, 0V
+
–
1/2 LT2078
U
–9V
8
4
510k
INFORMATION
9V
1%
U
1
200 s/DIV
1M
SUPPLY CURRENT = 9V BATTERY = 115 A
OUTPUT NOISE = 36 V
510k
5V
U
OUT
W
6
5
–
+
1/2 LT2078
LT2078/79 • F03
1M
–9V BATTERY = 85 A
P-P
U
, 0.1Hz TO 10Hz
7
LT2078/79 • TA03
–5.000V
OUT
expected matching performance at V
the two sides of the LT2078, and between amplifiers A and
D, and between amplifiers B and C of the LT2079.
Comparator Applications
The single supply operation of the LT2078/LT2079 and its
ability to swing close to ground while sinking current
lends itself to use as a precision comparator with TTL
compatible output.
THE USEFULNESS OF DIFFERENCE AMPLIFIERS IS LIMITED BY THE FACT THAT
THE INPUT RESISTANCE IS EQUAL TO THE SOURCE RESISTANCE. THE PICOAMPERE
OFFSET CURRENT AND LOW CURRENT NOISE OF THE LT2078 ALLOWS THE USE OF
1M SOURCE RESISTORS WITHOUT DEGRADATION IN PERFORMANCE. IN ADDITION,
WITH MEGOHM RESISTORS MICROPOWER OPERATION CAN BE MAINTAINED
100
–IN
+IN
4
2
0
0
V
Figure 4. Comparator Fall Response
Time to 10mV, 5mV, 2mV Overdrives
S
1M
1M
= 5V, 0V
Gain of 10 Difference Amplifier
10M
–
+
1/2 LT2078
10M
3V
200 s/DIV
OUTPUT OFFSET= 0.7mV
OUTPUT NOISE= 80 V
BANDWIDTH= 20kHz
OUTPUT
0.0035V TO 2.4V
S
= 5V, 0V between
LT2078/79 • TA04
LT2078/79 • F04
260 V
BANDWIDTH
P-P
RMS
(0.1Hz TO 10Hz)
OVER FULL
20789fa