LT1494/LT1495/LT1496
U
TYPICAL APPLICATIONS N
0nA to 200nA Current Meter
Battery Current Monitor
100pF
I
L
R
SENSE
0.1Ω
CHARGE
R1
12V
DISCHARGE
R
10M
5V
R
R4
A
A
–
–
10k
–
1/2
LT1495
1.5V
–
A2
A1
1/2 LT1495
1/2 LT1495
1/2
LT1495
R
R
INPUT
CURRENT
A
A
+
+
+
R2
9k
+
1.5V
R3
2N3904
DISCHARGE
2N3904
CHARGE
I
= 3µA WHEN I = 0
IN
S
2k
R
R
NO ON/OFF SWITCH
REQUIRED
B
A
FULL-SCALE
ADJUST
V
= I
R
SENSE
O
L
(
)
OUT
OUT
FOR R = 1k, R = 10k
R
R
A
B
B
B
0µA TO
200µA
µA
V
O
L
= 1V/A
1495 TA06
I
1495 TA05
High Side Current Sense
V
= 2.7V TO 36V
S
R
B
R
A
V
= I
R
S
O
L
(R )
1k
A
–
+
FOR R = 1k, R = 10k, R = 1Ω
A
B
S
R
SENSE
1Ω
V
LT1494
O
L
= 10 V/A
I
OUTPUT OFFSET ≈ I • R ≈ 10mV
OUTPUT CLIPS AT V – 2.4V
+
S
S
B
R
B
I
V
O
L
LOAD
10k
_
1495 TA09
RELATED PARTS
PART NUMBER
LTC®1440/41/42
LTC1443/44/45
DESCRIPTION
COMMENTS
Micropower Single/Dual Comparators with 1% Reference
Micropower Quad Comparators with 1% Reference
LTC1440: Single, LTC1441/42: Dual
LTC1443: 1.182 Reference
LTC1444/45: 1.221V Reference and Adjustable Hysteresis
LT1466/LT1467
LT1490A/LT1491A
LTC1540
75µA Dual/Quad Rail-to-Rail Input and Output Op Amps
50µA Dual/Quad Rail-to-Rail Input and Output Op Amps
Nanopower Single Comparator with 1% Reference
390µV V
950µV V
, Gain Bandwidth = 120kHz
, Gain Bandwidth = 200kHz
OS(MAX)
OS(MAX)
350nA Supply Current
225µV V , I = 55µA (MAX), Gain-Bandwidth = 200kHz
LT1636
Single Over-The-Top Micropower,
OS(MAX)
S
Rail-to-Rail Input and Output Op Amp
Shutdown Pin, MSOP
LT1672/LT1673/LT1674
2µA MAX, A ≥ 5 Single/Dual/Quad Over-The-Top Precision
Decompensated Version of the LT1494/LT1495/LT1496
A ≥ 5, Gain-Bandwidth = 12kHz
V
V
Rail-to-Rail Input and Output Op Amps
55µA Dual/Quad Single Supply Op Amps
17µA Dual/Quad Single Supply Op Amps
LT2078/LT2079
LT2178/LT2179
LT1782
120µV V
120µV V
, Gain Bandwidth = 200kHz
, Gain Bandwidth = 60kHz
OS(MAX)
OS(MAX)
Micropower, Over-The-Top, SOT-23, Rail-to-Rail
Input and Output Op Amp
SOT-23, 800µV V
, I = 55µA (Max),
OS(MAX) S
Gain-Bandwidth = 200kHz, Shutdown Pin
LT1783
1.2MHz, Over-The-Top, Micropower, Rail-to-Rail
Input and Output Op Amp in SOT-23
SOT-23, 800µV V , I = 300µA (Max),
Gain-Bandwidth = 1.2MHz, Shutdown Pin
OS(MAX)
S
149456fb LT/TP 0801 1.5K REV B • PRINTED IN USA
Linear Technology Corporation
●
1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408)432-1900
16
●
●
FAX: (408) 434-0507 TELEX: 499-3977 www.linear.com
LINEAR TECHNOLOGY CORPORATION 1997