LT1462/LT1463
Dual/Quad Micropower,
260µW C-Load Picoampere
Bias Current JFET Input Op Amps
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FEATURES
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DESCRIPTION
The LT ®1462 (dual) and LT1463 (quad) are the first
micropower op amps (45µA max per amp) to offer
picoampere input bias currents (1pA typ) and unity gain
stability for capacitive loads up to 10nF. The output can
swing a 10k load to within 1.5V of either supply, just like
op amps that require an order of magnitude more supply
current. This unique combination of performance makes
the LT1462/LT1463 ideal over a wide range of input and
output impedances.
Input Bias Current:
2pA Max (LT1462A)
20pA Max (LT1462, LT1463)
Supply Current per Amplifier: 45µA Max
Unity-Gain Stable for C-LoadTM Up to 10nF
Input Common Mode Range Includes Positive Rail
Guaranteed Specs with ±5V, ±15V Supplies
Gain Bandwidth Product: 175kHz Typ
Slew Rate: 0.13V/µs Typ
Guaranteed Matching Specifications
Standard Pinout: SO-8, SO-14 Package
In the design and testing of the LT1462/LT1463, particular
emphasis has been placed on optimizing performance in
the low cost SO-8 (dual) and 14-lead SO package (quad) for
±15V and ±5V supplies. The input common mode range
includes the positive rail. Slew rate (0.08V/µs min) and gain
bandwidth product (125kHz min) are 100% tested. A full set
of matching specifications is also provided.
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APPLICATIONS
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Battery-Powered Systems
Photocurrent Amplifiers
Low Frequency, Micropower Active Filters
Low Droop Track-and-Hold Circuits
, LTC and LT are registered trademarks of Linear Technology Corporation.
C-Load is a trademark of Linear Technology Corporation.
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TYPICAL APPLICATION
Low Power Logging Amplifier
R8
100k
Q1
2N3904
C5
1µF
D1
1N4148
C1
1nF
R1
100Ω
5V
2
–
5
C5
200pF
6
4
1/4 LT1463
3
R5
24k
+
DC
OUT C3
0.47µF
+
AMP 3
1/4 LT1463
–
1
Small-Signal Response, CL = 10nF
R9
1M
7
R7
10M
R10
50k
D3
1N4148
11
–5V
PHOTODIODE
R2
24k
C2
200pF
10
1/4 LT1463
9
+
1/4 LT1463
13
–
R4
10M
D2
1N4148
R3
100k
14
INPUT
DC OUTPUT
CURRENT VOLTAGE OF AMP 3
10pA
–0.145V
100pA
–0.341V
1nA
–0.518V
10nA
–0.684V
100nA
–0.846V
1 µA
–0.995V
10 µA
–1.13V
100 µA
–1.25V
1mA
–1.37V
8
–
R11
1M
R6
100k
12
C4
10µF
+
R12
10k
AC
OUT
R3
10k
1462 • TA01
AV = 1
VS = ±5V, ±15V
CL = 10nF
1462 • TA02
1
LT1462/LT1463
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ABSOLUTE MAXIMUM RATINGS
Supply Voltage ..................................................... ±20V
Differential Input Voltage ....................................... ±40V
Input Current ....................................................... 20mA
Output Short-Circuit Duration ......................... Indefinite
Operating Temperature Range ............... – 40°C to 85°C
Specified Temperature Range ................ – 40°C to 85°C
Maximum Junction Temperature ......................... 150°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
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PACKAGE/ORDER INFORMATION
ORDER PART
NUMBER
TOP VIEW
OUT A 1
–IN A 2
A
+IN B 3
B
V– 4
N8 PACKAGE
8-LEAD PDIP
8
V+
7
OUT B
6
–IN B
5
+IN B
S8 PACKAGE
8-LEAD PLASTIC SO
LT1462ACN8
LT1462ACS8
LT1462CN8
LT1462CS8
S8 PART MARKING
1462
1462A
TJMAX = 150°C, θJA = 130°C/ W (N)
TJMAX = 150°C, θJA = 190°C/ W (S)
ORDER PART
NUMBER
TOP VIEW
14 OUT D
OUT A 1
–IN A 2
+IN A 3
A
D
V+ 4
+IN B 5
LT1463CN
LT1463CS
13 –IN D
12 +IN D
11 V –
B
C
10 +IN C
–IN B 6
9
–IN C
OUT B 7
8
OUT C
N PACKAGE
14-LEAD PDIP
S PACKAGE
14-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 110°C/ W (N)
TJMAX = 150°C, θJA = 150°C/ W (S)
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS
VS = ±15V, VCM = 0V, TA = 25°C, unless otherwise noted.
MIN
LT1462AC
TYP
MAX
LT1462C/LT1463C
MIN
TYP
MAX
SYMBOL PARAMETER
CONDITIONS (Note 1)
VOS
Input Offset Voltage
VS = ±5V
VS = ±15V
0.4
0.6
0.8
2.0
0.4
0.6
0.8
2.0
UNITS
mV
mV
IOS
Input Offset Current
VS = ±5V
VS = ±15V
0.3
0.5
1.2
2.0
0.5
15
pA
pA
VS = ±5V
VS = ±15V
±0.5
±1
±2.0
±3.0
±1
±20
pA
pA
IB
Input Bias Current
en
Input Noise Voltage
0.1Hz to 10Hz
2
2
µVP-P
Input Noise Voltage Density
fO = 10Hz
fO = 1000Hz
92
76
92
76
nV/√Hz
nV/√Hz
Input Noise Current Density
fO = 10Hz, 1kHz (Note 3)
0.5
0.5
fA/√Hz
CMRR
Common Mode Rejection Ratio
VCM = – 12.5V to 15V
76
89
74
89
dB
PSRR
Power Supply Rejection Ratio
VS = ±2.5V to ±20V
81
90
78
90
dB
1012
1012
1012
1011
1012
1011
Ω
Ω
Ω
3
3
pF
RIN
Input Resistance—Differential
Common Mode
Common Mode
CIN
Input Capacitance
AVOL
Large-Signal Voltage Gain
2
VCM = – 12.5V to 8V
VCM = 8V to 15V
VO = ±10V, RL = 10k
VS = ±5V, VO = ±2V, RL = 10k
100
50
600
200
100
50
600
200
V/mV
V/mV
LT1462/LT1463
ELECTRICAL CHARACTERISTICS
VS = ±15V, VCM = 0V, TA = 25°C, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS (Note 1)
VOUT
Output Voltage Swing
RL = 10k
RL = 2k
VS = ±5V, RL = 2k
IO
Output Current
SR
Slew Rate
GBW
Gain Bandwidth Product
IS
Supply Current per Amplifier
MIN
LT1462AC
TYP
MAX
LT1462C/LT1463C
MIN
TYP
MAX
UNITS
±13.5
±11.0
±3.5
±13.7
±12.4
±3.7
±13.5
±11.0
±3.5
±13.7
±12.4
±3.7
±13
±17
±13
±17
mA
RL = 10k (Note 4)
0.08
0.13
0.08
0.13
V/µs
f = 10kHz
125
175
125
175
kHz
45
43
28
26
V
V
V
45
43
µA
µA
VS = ±5V
28
26
Channel Separation
f = 10Hz, VO = ±10V, RL = 10k
132
VOS
Offset Voltage Match (Note 7)
VS = ±5V
VS = ±15V
0.5
0.8
1.3
3.0
0.5
0.8
1.3
3.0
mV
mV
∆IB+
Noninverting Bias Current Match
(Note 7)
VS = ±5V
VS = ±15V
0.4
0.5
3.0
4.0
0.5
20
pA
pA
∆CMRR
Common Mode Rejection Match
(Notes 5, 7)
74
85
72
85
dB
∆PSRR
Power Supply Rejection Match
(Notes 5, 7)
78
88
76
88
dB
132
dB
VS = ±15V, VCM = 0V, 0°C ≤ TA ≤ 70°C, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS (Note 1)
MIN
LT1462AC
TYP
MAX
LT1462C/LT1463C
MIN
TYP
MAX
UNITS
VOS
Input Offset Voltage
VS = ±5V
VS = ±15V
●
●
0.5
0.9
1.4
2.8
0.5
0.9
1.4
2.8
mV
mV
∆VOS
∆Temp
Average Input Offset Voltage Drift
(Note 6)
●
7
20
7
20
µV/°C
IOS
Input Offset Current
●
10
50
25
450
pA
IB
Input Bias Current
●
60
150
150
750
pA
CMRR
Common Mode Rejection Ratio
VCM = – 12V to 15V
●
75
88
72
88
dB
PSRR
Power Supply Rejection Ratio
VS = ±3V to ±20V
●
80
89
76
89
dB
AVOL
Large-Signal Voltage Gain
VO = ±10V, RL = 10k
VS = ±5V, VO = ±2V, RL = 2k
●
●
90
45
600
140
90
45
600
140
V/mV
V/mV
IO
Output Current
●
±11
±14
±11
±14
mA
VOUT
Output Voltage Swing
RL = 10k
RL = 2k
VS = ±5V, RL = 2k
●
●
●
±13.4
±10.5
±3.4
±13.6
±12.1
±3.6
±13.4
±10.5
±3.4
±13.6
±12.1
±3.6
V
V
V
SR
Slew Rate
RL = 10k (Note 4)
●
0.075
0.128
0.075
0.128
V/µs
GBW
Gain Bandwidth Product
f = 10kHz
●
100
140
100
140
kHz
IS
Supply Current per Amplifier
VS = ±5V
●
●
31
28
45
43
31
28
45
43
µA
µA
VOS
Offset Voltage Match (Note 7)
VS = ±5V
VS = ±15V
●
●
0.7
0.9
2.0
3.5
0.7
0.9
2.0
3.5
mV
mV
∆IB+
Noninverting Bias Current Match
(Note 7)
●
5
40
35
500
pA
3
LT1462/LT1463
ELECTRICAL CHARACTERISTICS
VS = ±15V, VCM = 0V, 0°C ≤ TA ≤ 70°C, unless otherwise noted.
MIN
LT1462AC
TYP
MAX
LT1462C/LT1463C
MIN
TYP
MAX
SYMBOL PARAMETER
CONDITIONS (Note 1)
UNITS
∆CMRR
Common Mode Rejection Match
(Notes 5, 7)
●
73
84
70
84
dB
∆PSRR
Power Supply Rejection Match
(Notes 5, 7)
●
77
87
74
87
dB
VS = ±15V, VCM = 0V, – 40°C ≤ TA ≤ 85°C (Note 2), unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS (Note 1)
MIN
LT1462AC
TYP
MAX
LT1462C/LT1463C
MIN
TYP
MAX
UNITS
VOS
Input Offset Voltage
VS = ±5V
VS = ±15V
●
●
0.6
1.0
1.5
3.0
0.6
1.0
1.5
3.0
mV
mV
∆VOS
∆Temp
Average Input Offset Voltage Drift
(Note 6)
●
7
20
7
20
µV/°C
IOS
Input Offset Current
●
40
150
60
700
pA
IB
Input Bias Current
●
200
500
300
2500
pA
CMRR
Common Mode Rejection Ratio
VCM = –12V to 15V
●
74
87
70
87
dB
PSRR
Power Supply Rejection Ratio
VS = ±3V to ±20V
●
79
88
74
88
dB
AVOL
Large-Signal Voltage Gain
VO = ±10V, RL = 10k
VS = ±5V, VO = ±2V, RL = 2k
●
●
80
40
500
120
80
40
500
120
V/mV
V/mV
IO
Output Current
●
±10
±13
±10
±13
mA
VOUT
Output Voltage Swing
RL = 10k
RL = 2k
VS = ±5V, RL = 2k
●
●
●
±13.2
±10.0
±3.2
±13.4
±11.8
±3.4
±13.2
±10.0
±3.2
±13.4
±11.8
±3.4
V
V
V
SR
Slew Rate
RL = 10k (Note 4)
●
0.070
0.126
0.070
0.126
V/µs
GBW
Gain Bandwidth Product
f = 10kHz
●
95
135
95
135
kHz
IS
Supply Current per Amplifier
VS = ±5V
●
●
33
31
50
48
33
31
50
48
µA
µA
VOS
Offset Voltage Match (Note 7)
VS = ±5V
VS = ±15V
●
●
0.8
1.0
2.5
4.0
0.8
1.0
2.5
4.0
mV
mV
∆IB+
Noninverting Bias Current Match
(Note 7)
●
20
100
70
800
pA
∆CMRR
Common Mode Rejection Match
(Notes 5, 7)
●
72
83
68
83
dB
∆PSRR
Power Supply Rejection Match
(Notes 5, 7)
●
76
86
72
86
dB
The ● denotes specifications which apply over the full operating
temperature range.
Note 1: Typical parameters are defined as 60% yield of parameter
distributions of individual amplifiers, i.e., out of 100 LT1463s (or 100
LT1462s) typically 240 op amps (or 120) will be better than the indicated
specification.
Note 2: The LT1462 and LT1463 are designed, characterized and expected
to meet these extended temperature limits, but are not tested at – 40°C
and 85°C. Guaranteed I grade parts are available, consult factory.
Note 3: Current noise is calculated from the formula: in = (2qib)1/2 where
q = (1.6)(10–19) coulomb. The noise of source resistors up to 1G swamps
the contribution of current noise.
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Note 4: Slew rate is measured in AV = –1; input signal is ±7.5V, output is
measured at ±2.5V.
Note 5: ∆CMRR and ∆PSRR are defined as follows:
1. CMRR and PSRR are measured in µV/V on the individual amplifiers.
2. The difference is calculated between the matching sides in µV/V.
3. The result is converted to dB.
Note 6: This parameter is not 100% tested.
Note 7: Matching parameters are the difference between amplifiers A and
D and between B and C on the LT1463; between the two amplifiers on the
LT1462.
LT1462/LT1463
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TYPICAL PERFORMANCE CHARACTERISTICS
Input Bias and Offset Current vs
Temperature
20
VS = ±15V
VCM = 0V
LT1462/LT1463
LT1462A
100
BIAS CURRENT
10
15
15
COMMON MODE RANGE (V)
1000
16
VS = ±15V
TA = 25°C
INPUT BIAS CURRENT (pA)
10
5
0
OFFSET CURRENT
1
0
25
75
100
50
AMBIENT TEMPERATURE (°C)
–5
–15
125
10
–5
0
5
–10
COMMON MODE INPUT VOLTAGE (V)
13
12
–11
–12
–13
Supply Current vs Temperature
50
40
VS = ±15V
VS = ±5V
20
100
1/f CORNER = 5Hz
30
0.1
100 125
1
200
SLEW RISE
SLEW RATE (V/µs)
400
VS = ±5V
160
400
VS = ±15V
0.15
500
300
0.17
VO = ±10V, VS = ±15V
VO = ±2V, VS = ±5V
RL = 10k
VS = ±15V
6
4
TIME (SEC)
300
SLEW FALL
0.13
200
GAIN BANDWIDTH
0.11
8
10
Channel Separation vs Frequency
100
GAIN BANDWIDTH (kHz)
600
2
LT1462 • TPC06
Slew Rate, Gain Bandwidth
Product vs Temperature
1000
700
0
1000
10
100
FREQUENCY (Hz)
LT1462 • TPC05
Voltage Gain vs Temperature
800
0.1Hz to 10Hz Noise
VS = ±15V
TA = 25°C
LT1462 • TPC04
900
LT1462 • TPC03
NOISE VOLTAGE (2µV/DIV)
RMS VOLTAGE NOISE DENSITY (nV/√Hz)
1000
10
25 50 75
–75 –50 –25 0
TEMPERATURE (°C)
15
Voltage Noise vs Frequency
60
30
VS = ±15V
–15
–75 –50 –25 0 25 50 75 100 125
TEMPERATURE (°C)
LT1462 • TPC02
LT1462 • TPC01
SUPPLY CURRENT PER AMPLIFIER (µA)
14
–14
CHANNEL SEPARATION (dB)
INPUT BIAS AND OFFSET CURRENT (pA)
10000
VOLTAGE GAIN (V/mV)
Common Mode Range vs
Temperature
Input Bias Current Over the
Common Mode Range
VS = ±15V
TA = 25°C
RL = 10k
140
120
100
80
100
0
–75 –50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
LT1463 • TPC07
0.09
–75 –50 –25
0
0 25 50 75 100 125 150
TEMPERATURE (°C)
LT1462 • TPC08
60
10
100
10k
1k
FREQUENCY (Hz)
100k
1M
LT1462 • TPC09
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LT1462/LT1463
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TYPICAL PERFORMANCE CHARACTERISTICS
100
80
PHASE
40
60
30
40
20
20
GAIN
10
0
0
PHASE MARGIN (DEG)
50
–20
–10
1
VS = ±15V
TA = 25°C
80
60
40
20
–40
1000
10
100
FREQUENCY (kHz)
120
100
POSITIVE
SUPPLY
80
NEGATIVE
SUPPLY
60
40
20
0
10
100
10k
1k
FREQUENCY (Hz)
100k
10
1M
100
95
VS = ±15V
TA = 25°C
Closed-Loop Output Impedance
10k
VS = ±2.5V TO ±20V FOR PSRR
VS = ±15V, VCM = –12V TO 15V FOR CMRR
VS = ±15V
TA = 25°C
AV = 1
30
OUTPUT IMEDANCE (Ω)
60
CMRR, PSRR (dB)
PHASE MARGIN (DEG)
1k
40
1M
100k
LTC1462 • TPC12
Common Mode and Power Supply
Rejections vs Temperature
50
1k
10k
FREQUENCY (Hz)
LT1462 • TPC11
Phase Margin vs CLOAD
70
100
0
LT1462 • TPC10
80
TA = 25°C
POWER SUPPLY REJECTION RATIO (dB)
60
VOLTAGE GAIN (dB)
120
VS = ±15V
TA = 25°C
COMMON MODE REJECTION RATIO (dB)
70
Power Supply Rejection Ratio vs
Frequency
Common Mode Rejection Ratio vs
Frequency
Gain and Phase vs Frequency
PSRR
90
CMRR
85
20
CL = 0pF
CL = 1000pF
100
CL = 10nF
10
1
10
0
1
100
10
1000
CAPACITIVE LOAD (pF)
10000
80
25 50 75
–75 –50 –25 0
TEMPERATURE (°C)
10
0.1ms/DIV
0V
AV = 1
CL = 10pF
LT1462 • TPC16
10k
1k
FREQUENCY (Hz)
100k
1M
Small-Signal Response,
VS = ±5V, ±15V, CL = 1000pF
50mV/DIV
0V
100
LT1462 • TPC15
Small-Signal Response,
VS = ±5V, ±15V
20mV/DIV
5V/DIV
Large-Signal Response,
VS = ±15V
6
0.1
LT1462 • TPC14
LT1462 • TPC13
AV = 1
CL = 10pF
100 125
5µs/DIV
0V
AV = 1
CL = 1000pF
LT1462 • TPC17
50µs/DIV
LT1462 • TPC18
LT1462/LT1463
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APPLICATIONS INFORMATION
Phase Reversal Protection
Most industry standard JFET input single, dual and quad
op amps exhibit phase reversal at the output when the
negative common mode limit at the input is exceeded.
Common mode range is at a premium at ±5V supplies. The
Figures show a ±5.2V sine wave input (Figure 1a), the
response of a competing JFET input op amp in the unitygain follower mode (Figure 1b) and the response of the
LT1462/LT1463 (Figure 1c).
The phase reversal of Figure 1b can cause lock-up in servo
systems. The LT1462/LT1463 does not phase-reverse when
the common mode input is anywhere within the supplies.
LT1462 • F01b
LT1462 • F01a
(1a) ±5.2V Sine Wave
(1b) Typical JFET Input Op Amp
with ±5V Supplies
LT1462 • F01c
(1c) LT1462/LT1463 Output
with ±5V Supplies
Figure 1. Voltage Follower with Input Exceeding the Common Mode Range (VS = ±5V)
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LT1462/LT1463
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TYPICAL APPLICATIONS
10Hz 4th Order Chebyshev Lowpass Filter (0.01dB Ripple)
R2
237k
R5
154k
C1
33nF
R1
237k
C3
10nF
15V
R3
249k
2
VIN
C2
100nF
–
4
1/4 LT1463
3
R6
249k
R4
154k
1
13
+
1/4 LT1463
C4
330nF
11
–
12
14
+
VOUT
LT1462 • TA05
–15V
TYPICAL OFFSET ≈ 0.6mV
1% TOLERANCES
FOR VIN = 10VP-P,V OUT = –110dB AT f > 300Hz
V OUT = –6dB AT f = 16Hz
THE LOW INPUT BIAS CURRENTS ALLOW THE USE OF HIGH RESISTOR VALUES
Micropower 0.026% Frequency-to-Voltage Converter
R2
75k*
10k
GAIN TRIM
C2
1µF
R1
1k
–5V
13
LT1004-1.2
2
14
C1
1µF
–
8
1/2 LT1462
3
12
fIN = FREQUENCY IN
0kHz TO 30kHz
5V
1/4 LTC®1043
VREF = –1.235V
16
CS
1000pF
4
5V
17
–5V
+
1
0V TO 3V
OUTPUT
4
–5V
V OUT = (R2)(CS)(VREF)(fIN)
*TRW#MTR-5/120ppm
LT1462 • TA04
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LT1462/LT1463
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SI PLIFIED SCHE ATIC
VCC
R20
R6
R3
R4
Q3
×4
Q4
R7
Q5
J4
J3
R5
Q17
Q7
R17
– IN
Q18
Q20
J5
R22
C2
R10
Q16
+IN
Q22
R18
OUT
J1 J2
VCC
VCC
Q21
C1
Q15
Q28
VEE
Q25
Q13
Q14
Q1
Q8
R5
Q23
R16
Q11
1µA
R1
R19
R1O
Q29
Q2
Q9
R2
R5
Q19
Q24
VEE
Q10
Q26
Q27
R10
1462 SS
VEE
9
LT1462/LT1463
U
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
N8 Package
8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.400*
(10.160)
MAX
8
7
6
5
1
2
3
4
0.255 ± 0.015*
(6.477 ± 0.381)
0.300 – 0.325
(7.620 – 8.255)
0.065
(1.651)
TYP
0.009 – 0.015
(0.229 – 0.381)
(
+0.635
–0.381
0.125
(3.175)
MIN
0.005
(0.127)
MIN
+0.025
0.325 –0.015
8.255
0.130 ± 0.005
(3.302 ± 0.127)
0.045 – 0.065
(1.143 – 1.651)
)
0.018 ± 0.003
(0.457 ± 0.076)
0.100 ± 0.010
(2.540 ± 0.254)
0.015
(0.380)
MIN
N8 0695
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 – 0.197*
(4.801 – 5.004)
8
7
6
5
0.150 – 0.157**
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
1
0.010 – 0.020
× 45°
(0.254 – 0.508)
0.008 – 0.010
(0.203 – 0.254)
0.053 – 0.069
(1.346 – 1.752)
0°– 8° TYP
0.016 – 0.050
0.406 – 1.270
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
10
0.014 – 0.019
(0.355 – 0.483)
2
3
4
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
BSC
SO8 0695
LT1462/LT1463
U
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
N Package
14-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.770*
(19.558)
MAX
14
13
12
11
10
9
8
1
2
3
4
5
6
7
0.255 ± 0.015*
(6.477 ± 0.381)
0.130 ± 0.005
(3.302 ± 0.127)
0.300 – 0.325
(7.620 – 8.255)
0.045 – 0.065
(1.143 – 1.651)
0.015
(0.380)
MIN
0.065
(1.651)
TYP
0.009 – 0.015
(0.229 – 0.381)
+0.025
0.325 –0.015
0.005
(0.125)
MIN
0.100 ± 0.010
(2.540 ± 0.254)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
(
+0.635
8.255
–0.381
)
0.018 ± 0.003
(0.457 ± 0.076)
0.125
(3.175)
MIN
N14 0695
S Package
14-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.337 – 0.344*
(8.560 – 8.738)
14
13
12
11
10
9
8
0.228 – 0.244
(5.791 – 6.197)
0.150 – 0.157**
(3.810 – 3.988)
1
0.010 – 0.020
× 45°
(0.254 – 0.508)
0.008 – 0.010
(0.203 – 0.254)
2
3
4
5
6
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
(0.101 – 0.254)
0° – 8° TYP
0.016 – 0.050
0.406 – 1.270
0.014 – 0.019
(0.355 – 0.483)
7
0.050
(1.270)
TYP
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
S14 0695
11
LT1462/LT1463
U
TYPICAL APPLICATION
Micropower 0.016% Voltage-to-Frequency Converter
LT1009
VREF = – 2.5V
R3
1k
–5V
C4
1µF
17
1/2 LTC1043
5V
8
7
fOUT: 0kHz TO 3kHz
11
14
13
fOUT =
RIN
12
4
VIN
0V TO 5V
6.19k
GAIN
2.5k
5V
6
C1
1µF
–
5
+
4
–5V
R1
100k
)( )
VIN
1
(RIN)(CIN) VREF
16
CIN
0.1µF
8
1/2 LT1462
(
7
C2
30pF
R3
330k
Q1
2N2907A
C3
1µF
–5V
LT1462 • TA03
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1057
Dual JFET Input, Precision, High Speed Op Amp
Fast Settling Time, 14V/µs Slew Rate, 5MHz GBW, 450µV
VOS(MAX), 50pA IOS(MAX)
LT1113
Dual Low Noise, Precision, JFET Input Op Amp
6nV/√Hz Input Noise Voltage Density, 480pA IB, 6.3MHz GBW
LT1169
Dual Low Noise, Picoampere Bias Current,
JFET Input Op Amp
20pA IB, 8nV/√Hz en, 5.3MHz GBW, 1.5pF Input Capacitance
LT1457
Dual Precision JFET Input Op Amp C-Load
Drives 10,000pF Capacitive Load, 450µV VOS(MAX), 4µV/°C Drift
LT1464/LT1465
Dual/Quad Micropower, C-Load Picoampere
Bias Current JFET Input Op Amps
Drive 10nF Capacitive Loads, 1MHz GBW
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417 ● (408) 432-1900
FAX: (408) 434-0507● TELEX: 499-3977 ● www.linear-tech.com
14623fa LT/GP 0197 5K REV A • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1996
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