LT1494 Datasheet, PDF (16/16 Pages) Linear Technology – 1.5UA Max, Single, Dual and Quad Over-The-Top Precision Rail-to-Rail Input and Output Op Amps

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