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LT2179IS#TRPBF

P1-P3P4-P6P7-P9P10-P12
LT2178/LT2179
1
21789fc
TYPICAL APPLICATION
DESCRIPTION
17µA Max, Dual and Quad,
Single Supply, Precision Op Amps
The LT
®
2178 is a micropower dual op amp in a surface
mount standard 8-pin confi guration, the LT2179 is a
micropower quad op amp offered in a surface mount
14-pin package. Both devices are optimized for single
supply operation at 5V. Specifi cations are also provided
at ±15V supply.
The extremely low supply current is combined with true
precision specifi cations: offset voltage is 30µV and offset
current is 50pA. Both offset parameters have low drift with
temperature. The 1.5pA
P-P
current noise and picoampere
offset current permit the use the megohm level source
resistors without introducing serious errors. Voltage
noise, at 0.9µV
P-P
, is remarkably low considering the low
supply current.
The LT2178/LT2179 can be operated from a single supply
(as low as one lithium-cell or two NiCd batteries). The input
range goes below ground. The all-NPN output stage swings
to within a few millivolts of ground while sinking current.
No power consuming pull down resistors are needed.
For surface mount applications where three times higher
supply current is acceptable, the micropower LT1077
single, LT2078 dual and LT2079 quad are recommended.
The LT1077/LT2078/LT2079 have signifi cantly higher
bandwidth, slew rate, lower voltage noise and better output
drive capability. For applications requiring DIP packages
refer to the LT1178/LT1179.
Self-Buffered, Dual Output, Micropower Reference
FEATURES
APPLICATIONS
n
SO Package with Standard Pinout
n
Supply Current per Amplifi er: 17μA Max
n
Offset Voltage: 70μV Max
n
Offset Current: 250pA Max
n
Input Bias Current: 5nA Max
n
Voltage Noise: 0.9µV
P-P
, 0.1Hz to 10Hz
n
Current Noise: 1.5pA
P-P
, 0.1Hz to 10Hz
n
Offset Voltage Drift: 0.5µV/°C
n
Gain Bandwidth Product: 85kHz
n
Slew Rate: 0.04V/µs
n
Single Supply Operation
Input Voltage Range Includes Ground
Output Swings to Ground while Sinking Current
No Pull-Down Resistors Needed
n
Output Sources and Sinks 5mA Load Current
n
Battery- or Solar-Powered Systems
Portable Instrumentation
Remote Sensor Amplifi er
Satellite Circuitry
n
Micropower Sample-and-Hold
n
Thermocouple Amplifi er
n
Micropower Filters
Supply Current vs Temperature
–
+
2
3
+
–
5
6
1/2 LT2178
1
0.1µF
250k
1M*
1M*
LT1004-1.2
4
7
2M
0.1µF
1.2365V
OUTPUT
1/2 LT2178
2.470V
OUTPUT
4V TO 9V
21789 TA01
TOTAL BATTERY CURRENT = 28mA
OUTPUT ACCURACY = p0.4% MAX
TEMPERATURE COEFFICIENT = 20ppm/°C
LOAD REGULATION = 25ppm/mA, I
L
≤ 5mA, V
+
≥ 5V
LINE REGULATION = 10ppm/V
* 0.1% FILM RESISTORS
8
TEMPERATURE (°C)
–50
SUPPLY CURRENT PER AMPLIFIER A)
–25
0
25 50
21789 TA02
75
20
18
16
14
12
10
100
V
S
= p15V
V
S
= 5V, 0V
V
S
= p1.5V
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
LT2178/LT2179
2
21789fc
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ........................................................±22V
Differential Input Voltage.........................................±30V
Input Voltage ................ Equal to Positive Supply Voltage
............................. 5V Below Negative Supply Voltage
Output Short-Circuit Duration .......................... Indefi nite
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT2178ACS8#PBF LT2178ACS8#TRPBF 2178A 8-Lead Plastic SO 0°C to 70°C
LT2178AIS8#PBF LT2178AIS8#TRPBF 2178AI 8-Lead Plastic SO –40°C to 85°C
LT2178CS8#PBF LT2178CS8#TRPBF 2178 8-Lead Plastic SO 0°C to 70°C
LT2178IS8#PBF LT2178IS8#TRPBF 2178I 8-Lead Plastic SO –40°C to 85°C
LT2179ACS#PBF LT2179ACS#TRPBF 2179A 14-Lead Plastic SO 0°C to 70°C
LT2179CS#PBF LT2179CS#TRPBF 2179 14-Lead Plastic SO 0°C to 70°C
LT2179IS#PBF LT2179IS#TRPBF 2179I 14-Lead Plastic SO –40°C to 85°C
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT2178ACS8 LT2178ACS8#TR 2178A 8-Lead Plastic SO 0°C to 70°C
LT2178AIS8 LT2178AIS8#TR 2178AI 8-Lead Plastic SO –40°C to 85°C
LT2178CS8 LT2178CS8#TR 2178 8-Lead Plastic SO 0°C to 70°C
LT2178IS8 LT2178IS8#TR 2178I 8-Lead Plastic SO –40°C to 85°C
LT2179ACS LT2179ACS#TR 2179A 14-Lead Plastic SO 0°C to 70°C
LT2179CS LT2179CS#TR 2179 14-Lead Plastic SO 0°C to 70°C
LT2179IS LT2179IS#TR 2179I 14-Lead Plastic SO –40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi
cations, go to: http://www.linear.com/tapeandreel/
1
2
3
4
8
7
6
5
TOP VIEW
V
+
OUT B
–IN B
+IN B
OUT A
–IN A
+IN A
V
–
S8 PACKAGE
8-LEAD PLASTIC SO
+
–
A
+
–
B
T
JMAX
= 150°C, θ
JA
= 190°C/W
TOP VIEW
S PACKAGE
14-LEAD PLASTIC SO
1
2
3
4
5
6
7
14
13
12
11
10
9
8
OUT A
–IN A
+IN A
V
+
+IN B
–IN B
OUT B
OUT D
–IN D
+IN D
V
–
+IN C
–IN C
OUT C
+
–
A
+
–
+
–
+
–
D
B
C
T
JMAX
= 150°C, θ
JA
= 150°C/W
PIN CONFIGURATION
Specifi ed Temperature Range
Commercial.............................................. 0°C to 70°C
Industrial ............................................. –40°C to 85°C
Storage Temperature Range ................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
LT2178/LT2179
3
21789fc
ELECTRICAL CHARACTERISTICS
V
S
= 5V, 0V, V
CM
= 0.1V, V
O
= 1.4V, T
A
= 25°C, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS
LT2178AC/LT2178AI
LT2179AC
LT2178C/LT2178I
LT2179C/LT2179I
UNITSMIN TYP MAX MIN TYP MAX
V
OS
Input Offset Voltage LT2178
LT2179
30
35
70
100
40
40
120
150
V
V
ΔV
OS
ΔTime
Long Term Input Offset
Voltage Stability
0.5 0.6 V/Mo
I
OS
Input Offset Current 0.05 0.25 0.05 0.35 nA
I
B
Input Bias Current 3 5 3 6 nA
e
n
Input Noise Voltage 0.1Hz to 10Hz (Note 2) 0.9 2.0 0.9 µV
P-P
Input Noise Voltage Density f
O
= 10Hz (Note 2)
f
O
= 1000Hz (Note 2)
50
49
75
65
50
49
nV√Hz
nV√Hz
i
n
Input Noise Current 0.1Hz to 10Hz (Note 2) 1.5 2.5 1.5 pA
P-P
Input Noise Current Density f
O
= 10Hz (Note 2)
f
O
= 1000Hz
0.03
0.01
0.07 0.03
0.01
pA√Hz
pA√Hz
Input Resistance
Differential Mode
Common Mode
(Note 3)
0.8 2
12
0.6 2
12
G
G
Input Voltage Range 3.5
0
3.9
–0.3
3.5
0
3.9
–0.3
V
V
CMRR Common Mode Rejection Ratio V
CM
= 0V to 3.5V 93 103 90 102 dB
PSRR Power Supply Rejection Ratio V
S
= 2.2V to 12V 94 104 92 104 dB
A
VOL
Large-Signal Voltage Gain V
O
= 0.03V to 4V, No Load (Note 3)
V
O
= 0.03V to 3.5V, R
L
= 50k
140
80
700
200
110
70
700
200
V/mV
V/mV
Maximum Output Voltage Swing Output Low, No Load
Output Low, 2k to GND
Output Low, I
SINK
= 100µA
6.5
0.2
120
9
0.6
160
6.5
0.2
120
9
0.6
160
mV
mV
mV
Output High, No Load
Output High, 2k to GND
4.2
3.5
4.4
3.8
4.2
3.5
4.4
3.8
V
V
SR Slew Rate A
V
= 1, C
L
= 10pF (Note 3) 0.013 0.025 0.013 0.025 V/µs
GBW Gain Bandwidth Product f
O
≤ 5kHz 60 60 kHz
I
S
Supply Current per Amplifi er
V
S
= ±1.5V, V
O
= 0V
13
12
18
17
14
13
21
20
µA
µA
Channel Separation
ΔV
IN
= 3V, RL = 10k
110 110 dB
Minimum Supply Voltage (Note 4) 2 2.2 2 2.2 V
SYMBOL PARAMETER CONDITIONS
LT2178AI LT2178I/LT2179I
UNITSMIN TYP MAX MIN TYP MAX
V
OS
Input Offset Voltage LT2178
LT2179
l
l
70
80
270
300
95
100
370
400
V
V
ΔV
OS
ΔT
Input Offset Voltage Drift LT2178 (Note 5)
LT2179
l
0.4
0.5
1.8
3
0.5
0.6
2.3
3.5
µV/ºC
µV/ºC
I
OS
Input Offset Current
l
0.07 0.70 0.1 1 nA
I
B
Input Bias Current
l
37 48 nA
CMRR Common Mode Rejection Ratio V
CM
= 0.05V to 3.2V
l
86 100 84 98 dB
PSRR Power Supply Rejection Ratio V
S
= 3V to 12V
l
88 100 86 100 dB
The l denotes the specifi cations which apply over the full operating temperature range. V
S
= 5V, 0V, V
CM
= 0.1V, V
O
= 1.4V,
–40°C ≤ T
A
≤ 85°C for I-grades, unless otherwise noted. (Note 6)
P1-P3P4-P6P7-P9P10-P12

LT2179IS#TRPBF

Mfr. #:
Buy LT2179IS#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Precision Amplifiers 17 A Max, 4x, 1x S, Prec Op Amps
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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