LT1634BCMS8-1.25#TR [Linear]
LT1634 - Micropower Precision Shunt Voltage Reference; Package: MSOP; Pins: 8; Temperature Range: 0°C to 70°C;型号: | LT1634BCMS8-1.25#TR |
厂家: | Linear |
描述: | LT1634 - Micropower Precision Shunt Voltage Reference; Package: MSOP; Pins: 8; Temperature Range: 0°C to 70°C 光电二极管 |
文件: | 总12页 (文件大小:268K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LT1634
Micropower Precision
Shunt Voltage Reference
FEATURES
DESCRIPTION
The LT®1634 is a micropower, precision, shunt voltage
reference. The bandgap reference uses trimmed preci-
sion thin film resistors to achieve 0.05% initial voltage
accuracy. Improved curvature correction technique guar-
antees 10ppm/°C maximum temperature drift. Advances
indesign,processingandpackagingtechniquesguarantee
10μA operation and low temperature cycling hysteresis.
The LT1634 does not require an output compensation
capacitor,butisstablewithcapacitiveloads.Lowdynamic
impedance makes the LT1634 reference easy to use from
unregulated supplies.
n
Iꢃitial 6oltage Accuracy: .4.5%
n
Low ꢀperatiꢃg Curreꢃt: 1.μA
n
Low Driꢂt: 1.ppm/°C Max
Less Than 1Ω Dynamic Impedance
n
n
Both Commercial and Industrial Temperature Range
Parts Are Available
n
Available in 1.25V, 2.5V, 4.096V and 5V in SO-8
and TO-92 Packages
n
1.25V and 2.5V Available in MSOP Package
APPLICATIONS
The LT1634 reference can be used as a high performance
upgrade to the LM185/LM385, LT1004 and LT1034 where
lower power and guaranteed temperature drift is
required.
n
Portable Meters
n
Precision Regulators
n
A/D and D/A Converters
Calibrators
n
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Super Accurate ±±4.096 ꢀutput ꢁeꢂereꢃceꢄ
Temperature Driꢂt
5V
45k
+
2.0
I
= 10μA
= 1.25V
R
OUT
V
OUT
4.096V
V
LT1495
LT1634-4.096
1.5
1.0
–
–5V
0.5
0
5V
4
LTC®1043
5
6
–0.5
–1.0
–1.5
I
= 200μA
S
OUTPUT ACCURACY
BETTER THAN 0.075%
AT 500μA OUTPUT
1μF
15
18
–2.0
17
–5V
–20
20
40
60
80
100
–40
0
TEMPERATURE (°C)
1634 TA02
5V
–
V
OUT
LT1495
–4.096V
+
1μF
–5V
1634 TA01
1634fe
1
LT1634
(Note 1)
ABSOLUTE MAXIMUM RATINGS
Current Operating
Operating Temperature Range
1.25V ...............................................................100mA
2.5V...................................................................50mA
4.096V, 5V.........................................................30mA
Forward Current.....................................................20mA
Commercial ............................................. 0°C to 70°C
Industrial .............................................–40°C to 85°C
Storage Temperature Range (Note 1)..... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)...................300°C
PIN CONFIGURATION
TOP VIEW
BOTTOM VIEW
TOP VIEW
1
2
3
4
8
7
6
5
DNC*
DNC*
DNC*
GND
DNC*
DNC*
DNC*
DNC*
DNC*
GND
1
2
3
4
8 DNC*
7 DNC*
TEST** V
GND
OUT
6 V
OUT
V
OUT
5 TEST**
TEST**
MS8 PACKAGE
8-LEAD PLASTIC MSOP
Z PACKAGE
3-LEAD PLASTIC TO-92
S8 PACKAGE
T
= 125°C, θ = 250°C/W
8-LEAD PLASTIC SO
JMAX
JA
T
JMAX
= 125°C, θ = 190°C/W
T
= 125°C, θ = 190°C/W
JA
JMAX
JA
*Connected internally. Do Not Connect external circuitry to these pins.
**The TEST pin can be left unconnected or connected to the GND pin (GND pin on Z package, Pin4 on MS8 and S8 packages)
ORDER INFORMATION
LEAD FꢁEE FINISH
TAPE AND ꢁEEL
PAꢁT MAꢁKING
LTCV
LTDF
PACKAGE DESCꢁIPTIꢀN
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
3-Lead Plastic TO-92
3-Lead Plastic TO-92
3-Lead Plastic TO-92
3-Lead Plastic TO-92
SPECIFIED TEMPEꢁATUꢁE ꢁANGE
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
LT1634BCMS8-1.25#PBF
LT1634BCMS8-2.5#PBF
LT1634ACS8-1.25#PBF
LT1634ACS8-2.5#PBF
LT1634ACS8-4.096#PBF
LT1634ACS8-5#PBF
LT1634AIS8-1.25#PBF
LT1634AIS8-2.5#PBF
LT1634AIS8-4.096#PBF
LT1634AIS8-5#PBF
LT1634BCMS8-1.25#TRPBF
LT1634BCMS8-2.5#TRPBF
LT1634ACS8-1.25#TRPBF
LT1634ACS8-2.5#TRPBF
LT1634ACS8-4.096#TRPBF
LT1634ACS8-5#TRPBF
LT1634AIS8-1.25#TRPBF
LT1634AIS8-2.5#TRPBF
LT1634AIS8-4.096#TRPBF
LT1634AIS8-5#TRPBF
1634A1
1634A2
1634A4
1634A5
634AI1
634AI2
634AI4
634AI5
1634B1
1634B2
1634B4
1634B5
634BI1
634BI2
634BI4
634BI5
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
LT1634BCS8-1.25#PBF
LT1634BCS8-2.5#PBF
LT1634BCS8-4.096#PBF
LT1634BCS8-5#PBF
LT1634BIS8-1.25#PBF
LT1634BIS8-2.5#PBF
LT1634BIS8-4.096#PBF
LT1634BIS8-5#PBF
LT1634BCS8-1.25#TRPBF
LT1634BCS8-2.5#TRPBF
LT1634BCS8-4.096#TRPBF
LT1634BCS8-5#TRPBF
LT1634BIS8-1.25#TRPBF
LT1634BIS8-2.5#TRPBF
LT1634BIS8-4.096#TRPBF
LT1634BIS8-5#TRPBF
LT1634CCZ-1.25#PBF
LT1634CCZ-2.5#PBF
LT1634CCZ-4.096#PBF
LT1634CCZ-5#PBF
LT1634CCZ-1.25#TRPBF
LT1634CCZ-2.5#TRPBF
LT1634CCZ-4.096#TRPBF
LT1634CCZ-5#TRPBF
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
1634fe
2
LT1634
AVAILABLE OPTIONS
PACKAGE TYPE
S8
TEMPEꢁATUꢁE CꢀEFFICIENT
(ppm/°C)
TEMPEꢁATUꢁE
ACCUꢁACY (%)
MS8
Z
0°C to 70°C
0.05
10
10
25
25
25
LT1634ACS8-1.25
LT1634ACS8-2.5
LT1634ACS8-4.096
LT1634ACS8-5
LT1634AIS8-1.25
LT1634AIS8-2.5
LT1634AIS8-4.096
LT1634AIS8-5
LT1634BCS8-1.25
LT1634BCS8-2.5
LT1634BCS8-4.096
LT1634BCS8-5
LT1634BIS8-1.25
LT1634BIS8-2.5
LT1634BIS8-4.096
LT1634BIS8-5
–40°C to 85°C
0°C to 70°C
0.05
0.05
0.05
0.20
LT1634BCMS8-1.25
LT1634BCMS8-2.5
–40°C to 85°C
0°C to 70°C
LT1634CCZ-1.25
LT1634CCZ-2.5
LT1634CCZ-4.096
LT1634CCZ-5
The l deꢃoteꢄ the ꢄpecificatioꢃꢄ which apply over the ꢂull
1.25V ELECTRICAL CHARACTERISTICS
operatiꢃg temperature raꢃge, otherwiꢄe ꢄpecificatioꢃꢄ are at TA = 25°C4 (Note 3)
PAꢁAMETEꢁ
CꢀNDITIꢀNS
MIN
TYP
MAX
UNITS
Reverse Breakdown Voltage
LT1634ACS8/LT1634BCMS8/LT1634BCS8/
1.24937
–0.05
1.250
1.25062
0.05
V
%
LT1634AIS8/LT1634BIS8 (I = 10μA)
R
LT1634CCZ (I = 10μA)
1.24750
–0.20
1.24849
–0.12
1.24781
–0.175
1.24718
–0.225
1.24547
–0.362
1.24531
–0.375
1.250
1.250
1.250
1.250
1.250
1.250
1.25250
0.20
1.25149
0.12
1.25218
0.175
1.25281
0.225
1.25453
0.362
1.25469
0.375
V
R
%
l
l
l
l
l
LT1634ACS8 (I = 10μA)
V
%
V
%
V
%
V
%
R
LT1634AIS8 (I = 10μA)
R
LT1634BCS8/LT1634BCMS8 (I = 10μA)
R
LT1634BIS8 (I = 10μA)
R
LT1634CCZ (I = 10μA)
V
%
R
Reverse Breakdown Change
with Current (Note 4)
10μA ≤ I ≤ 2mA
0.25
0.30
1
2
mV
mV
R
l
2mA ≤ I ≤ 20mA
2
2
8
mV
mV
μA
R
l
l
10
Minimum Operating Current
7
l
l
Temperature Coefficient (Note 8)
LT1634A, I = 10μA
4
10
25
0.5
1.0
ppm/°C
ppm/°C
R
LT1634B/LT1634C, I = 10μA
10
R
Reverse Dynamic Impedance (Note 5) 10μA ≤ I ≤ 2mA
0.125
0.150
Ω
Ω
R
Low Frequency Noise (Note 6)
Hysteresis (Note 7)
I = 10μA, 0.1Hz ≤ f ≤ 10Hz
10
μV
P-P
R
ΔT = –40°C to 85°C
ΔT = 0°C to 70°C
160
40
ppm
ppm
1634fe
3
LT1634
The l deꢃoteꢄ the ꢄpecificatioꢃꢄ which apply over the ꢂull
2.5V ELECTRICAL CHARACTERISTICS
operatiꢃg temperature raꢃge, otherwiꢄe ꢄpecificatioꢃꢄ are at TA = 25°C4 (Note 3)
PAꢁAMETEꢁ
CꢀNDITIꢀNS
MIN
TYP
MAX
UNITS
Reverse Breakdown Voltage
LT1634ACS8/LT1634BCMS8/LT1634BCS8/
2.49875
–0.05
2.500
2.50125
0.05
V
%
LT1634AIS8/LT1634BIS8 (I = 10μA)
R
LT1634CCZ (I = 10μA)
2.49500
–0.20
2.49700
–0.12
2.49562
–0.175
2.49437
–0.225
2.49094
–0.362
2.49062
–0.375
2.500
2.500
2.500
2.500
2.500
2.500
2.50500
0.20
2.50300
0.12
2.50437
0.175
2.50562
0.225
2.50906
0.362
2.50937
0.375
V
R
%
l
l
l
l
l
LT1634ACS8 (I = 10μA)
V
%
V
%
V
%
V
%
R
LT1634AIS8 (I = 10μA)
R
LT1634BCMS8/LT1634BCS8 (I = 10μA)
R
LT1634BIS8 (I = 10μA)
R
LT1634CCZ (I = 10μA)
V
%
R
Reverse Breakdown Change
with Current (Note 4)
10μA ≤ I ≤ 2mA
0.30
0.40
1.5
3.0
mV
mV
R
l
2mA ≤ I ≤ 20mA
2
2
8
mV
mV
μA
R
l
l
10
Minimum Operating Current
8
l
l
Temperature Coefficient (Note 8)
LT1634A, I = 10μA
4
10
10
25
ppm/°C
ppm/°C
R
LT1634B/LT1634C, I = 10μA
R
Reverse Dynamic Impedance (Note 5) 10μA ≤ I ≤ 2mA
0.15
0.20
0.75
1.50
Ω
Ω
R
l
Low Frequency Noise (Note 6)
Hysteresis (Note 7)
I = 10μA, 0.1Hz ≤ f ≤ 10Hz
15
μV
P-P
R
ΔT = –40°C to 85°C
ΔT = 0°C to 70°C
160
40
ppm
ppm
The l deꢃoteꢄ the ꢄpecificatioꢃꢄ which apply over the ꢂull
4.096 ELECTRICAL CHARACTERISTICS
operatiꢃg temperature raꢃge, otherwiꢄe ꢄpecificatioꢃꢄ are at TA = 25°C4 (Note 3)
PAꢁAMETEꢁ
CꢀNDITIꢀNS
MIN
TYP
MAX
UNITS
Reverse Breakdown Voltage
LT1634ACS8/LT1634BCS8/
4.09395
–0.05
4.096
4.09805
0.05
V
%
LT1634AIS8/LT1634BIS8 (I = 20μA)
R
LT1634CCZ (I = 20μA)
4.08780
–0.20
4.09108
–0.12
4.08883
–0.175
4.08678
–0.225
4.08115
–0.362
4.08064
–0.375
4.096
4.096
4.096
4.096
4.096
4.096
4.10419
0.20
4.10091
0.12
4.10317
0.175
4.10522
0.225
4.11085
0.362
4.11137
0.375
V
R
%
l
l
l
l
l
LT1634ACS8 (I = 20μA)
V
%
V
%
V
%
V
%
R
LT1634AIS8 (I = 20μA)
R
LT1634BCS8 (I = 20μA)
R
LT1634BIS8 (I = 20μA)
R
LT1634CCZ (I = 20μA)
V
%
R
Reverse Breakdown Change
with Current (Note 4)
20μA ≤ I ≤ 2mA
0.30
0.40
1.5
3.0
mV
mV
R
l
2mA ≤ I ≤ 20mA
6
6
15
20
15
mV
mV
μA
R
l
l
Minimum Operating Current
1634fe
4
LT1634
The l deꢃoteꢄ the ꢄpecificatioꢃꢄ which apply over the ꢂull
4.096V ELECTRICAL CHARACTERISTICS
operatiꢃg temperature raꢃge, otherwiꢄe ꢄpecificatioꢃꢄ are at TA = 25°C4 (Note 3)
PAꢁAMETEꢁ
CꢀNDITIꢀNS
LT1634A, I = 20μA
MIN
TYP
MAX
UNITS
l
l
Temperature Coefficient (Note 8)
4
10
10
25
ppm/°C
ppm/°C
R
LT1634B/LT1634C, I = 20μA
R
Reverse Dynamic Impedance (Note 5) 20μA ≤ I ≤ 2mA
0.15
0.20
0.75
1.50
Ω
Ω
R
l
Low Frequency Noise (Note 6)
Hysteresis (Note 7)
I = 20μA, 0.1Hz ≤ f ≤ 10Hz
30
μV
P-P
R
ΔT = –40°C to 85°C
ΔT = 0°C to 70°C
160
40
ppm
ppm
The l deꢃoteꢄ the ꢄpecificatioꢃꢄ which apply over the ꢂull operatiꢃg
5V ELECTRICAL CHARACTERISTICS
temperature raꢃge, otherwiꢄe ꢄpecificatioꢃꢄ are at TA = 25°C4 (Note 3)
PAꢁAMETEꢁ
CꢀNDITIꢀNS
MIN
TYP
MAX
UNITS
Reverse Breakdown Voltage
LT1634ACS8/LT1634BCS8/
4.99750
–0.05
5.000
5.00250
0.05
V
%
LT1634AIS8/LT1634BIS8 (I = 20μA)
R
LT1634CCZ (I = 20μA)
4.99000
–0.20
4.99400
–0.12
4.99125
–0.175
4.98875
–0.225
498188
–0.362
4.98126
–0.375
5.000
5.000
5.000
5.000
5.000
5.000
5.01000
0.20
5.00600
0.12
5.00875
0.175
5.01125
0.225
5.01813
0.362
5.01876
0.375
V
R
%
l
l
l
l
l
LT1634ACS8 (I = 20μA)
V
%
V
%
V
%
V
%
R
LT1634AIS8 (I = 20μA)
R
LT1634BCS8 (I = 20μA)
R
LT1634BIS8 (I = 20μA)
R
LT1634CCZ (I = 20μA)
V
%
R
Reverse Breakdown Change
with Current (Note 4)
20μA ≤ I ≤ 2mA
0.30
0.40
1.5
3.0
mV
mV
R
l
2mA ≤ I ≤ 20mA
6
6
15
20
15
mV
mV
μA
R
l
l
Minimum Operating Current
l
l
Temperature Coefficient (Note 8)
LT1634A, I = 20μA
4
10
10
25
ppm/°C
ppm/°C
R
LT1634B/LT1634C, I = 20μA
R
Reverse Dynamic Impedance (Note 5) 20μA ≤ I ≤ 2mA
0.15
0.20
0.75
1.50
Ω
Ω
R
l
Low Frequency Noise (Note 6)
Hysteresis (Note 7)
I = 20μA, 0.1Hz ≤ f ≤ 10Hz
35
μV
P-P
R
ΔT = –40°C to 85°C
ΔT = 0°C to 70°C
160
40
ppm
ppm
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: If the part is stored outside of the specific operating temperature
range, the output may shift due to hysteresis.
Note 3: ESD (Electrostatic Discharge) sensitive device. Use proper ESD
handling precautions.
Note ±: Output requires 0.1μF for operating current greater than 1mA.
Note 5: This parameter is guaranteed by “reverse breakdown change with
Note 7: Hysteresis in output voltage is created by package stress that
differs depending on whether the IC was previously at a higher or lower
temperature. Output voltage is always measured at 25°C but the IC is
cycled to 85°C or –40°C before successive measurements. Hysteresis is
roughly proportional to the square of the temperature change. Hysteresis
is not normally a problem for operational temperature excursions where
the instrument might be stored at high or low temperature.
Note 8: Temperature coefficient is calculated from the minimum and
maximum output voltage measured at T , Room and T
as follows:
MIN
MAX
TC = (V
– V
)/(T
– T
)
MIN
OMAX
OMIN
MAX
Incremental slope is also measured at 25°C.
current” test.
Note 9: Peak-to-peak noise is measured with a single highpass filter at
0.1Hz and 2-pole lowpass filter at 10Hz.
1634fe
5
LT1634
1.25V TYPICAL PERFORMANCE CHARACTERISTICS
ꢁeverꢄe 6oltage Chaꢃge
vꢄ Curreꢃt
ꢁeverꢄe Characteriꢄticꢄ
Temperature Driꢂt
4
3
2
1
0
2.0
10
8
10μA
T = –40°C TO 85°C
A
T
= –40°C TO 85°C
A
100μA
200μA
500μA
1mA
1.5
1.0
0.5
0
6
4
–0.5
–1.0
–1.5
2
–2.0
0
–20
20
40
60
80
0.01
0.1
1
10
100
–40
0
0.4
0.8
1.2
0
1.6
REVERSE CURRENT (mA)
TEMPERATURE (°C)
REVERSE VOLTAGE (V)
1634-1.25 G03
1634-1.25 G02
1634-1.25 G01
ꢁeverꢄe Dyꢃamic Impedaꢃce
Dyꢃamic Impedaꢃce vꢄ Frequeꢃcy
Forward Characteriꢄticꢄ
1.2
10000
1000
100
100
10
1
T
= 25°C
T
= 25°C
A
A
T = 25°C
A
f = 25Hz
I
= 10μA
0.8
0.4
0
R
I
= 10μA
R
C
= 0.022μF
OUT
C
= 0μF
OUT
10
I
= 100μA
= 0.47μF
R
C
OUT
I
= 100μA
OUT
1
R
C
= 0μF
0.1
0.1
0.001
0.01
0.1
1
10
100
0.01
0.1
1
10
100
0.01
0.1
1
10
100
FREQUENCY (kHz)
FORWARD CURRENT (mA)
REVERSE CURRENT (mA)
1634-1.25 G05
1634-1.25 G06
1634-1.25 G04
.41Hz to 1.Hz Noiꢄe
ꢁeꢄpoꢃꢄe Time
ꢁeꢄpoꢃꢄe Time
8
6
T
= –40°C TO 85°C
= 10μA
A
1.5V
1V
1.5V
1V
I
R
0.5V
0V
4
0.5V
0V
OUT
IN
OUT
IN
2
5V
0V
0
5V
0V
–2
–4
–6
–8
I
= 10μA
= 0
1634-1.25 G08
I
= 10μA
OUT
1634-1.25 G09
200μs/DIV
R
OUT
20ms/DIV
R
C
C
= 0.1μF
0
10
20 30
40
50
60
70
TIME (SEC)
1634-1.25 G07
1634fe
6
LT1634
2.5V TYPICAL PERFORMANCE CHARACTERISTICS
ꢁeverꢄe 6oltage Chaꢃge
vꢄ Curreꢃt
ꢁeverꢄe Characteriꢄticꢄ
Temperature Driꢂt
6
5
4
3
2
1
0
4
10
8
T
= –40°C TO 85°C
T
= –40°C TO 85°C
10μA
A
A
100μA
200μA
500μA
1mA
3
2
1
0
6
4
–1
–2
–3
2
0
–4
0.01
0.1
1
10
100
–20
20
40
60
80
–40
0
0
0.5
1.5
2.0
2.5
3.0
1.0
REVERSE CURRENT (mA)
REVERSE VOLTAGE (V)
TEMPERATURE (°C)
1634-2.5 G03
1634-2.5 G02
1634-2.5 G01
ꢁeverꢄe Dyꢃamic Impedaꢃce
Dyꢃamic Impedaꢃce vꢄ Frequeꢃcy
Forward Characteriꢄticꢄ
1.2
10000
1000
100
100
10
1
T
= 25°C
T
= 25°C
A
T
= 25°C
A
A
f = 25Hz
I
= 10μA
R
0.8
0.4
0
C
= 0μF
OUT
I
= 10μA
R
C
= 0.068μF
OUT
10
I
= 100μA
= 0.47μF
R
C
OUT
I
= 100μA
OUT
R
C
= 0μF
1
0.1
0.1
0.01
0.1
1
FREQUENCY (kHz)
10
100
0.01
0.1
1
10
100
0.001
0.01
0.1
1
10
100
FORWARD CURRENT (mA)
REVERSE CURRENT (mA)
1634-2.5 G05
1634-2.5 G06
1635-2.5 G04
.41Hz to 1.Hz Noiꢄe
ꢁeꢄpoꢃꢄe Time
ꢁeꢄpoꢃꢄe Time
20
15
T
= –40°C TO 85°C
= 10μA
A
3V
2V
1V
0V
3V
I
R
2V
1V
0V
10
5
5V
0V
5V
0V
0
–5
I
= 10μA
OUT
1634-2.5 G09
I
= 10μA
= 0
1634-2.5 G08
20ms/DIV
R
200μs/DIV
R
OUT
–10
–15
–20
C
= 0.1μF
C
20 30 40 50
TIME (SEC)
0
10
60 70 80
1634-2.5 G07
1634fe
7
LT1634
4.096V TYPICAL PERFORMANCE CHARACTERISTICS
ꢁeverꢄe 6oltage Chaꢃge
vꢄ Curreꢃt
ꢁeverꢄe Characteriꢄticꢄ
Temperature Driꢂt
20
16
12
8
6
4
5
4
3
2
1
0
T
= –40°C TO 85°C
T
= –40°C to 85°C
A
20μA
A
100μA
200μA
500μA
1mA
2
0
–2
–4
–6
4
0
0
2
3
4
5
0.01
0.1
1
10
100
1
–20
0
40
60
80
–40
20
REVERSE CURRENT (mA)
REVERSE VOLTAGE (V)
TEMPERATURE (°C)
1634-4 G03
1634-4 G01
1634-4 G02
ꢁeverꢄe Dyꢃamic Impedaꢃce
Dyꢃamic Impedaꢃce vꢄ Frequeꢃcy
Forward Characteriꢄticꢄ
1.2
10000
100
10
1
T
= 25°C
T
= 25°C
A
T = 25°C
A
A
f = 25Hz
I
= 20μA
R
1000
100
10
C
= 0μF
OUT
0.8
0.4
0
I
= 20μA
R
C
= 0.033μF
OUT
I
= 100μA
= 0.33μF
R
C
OUT
I
= 100μA
OUT
R
C
= 0μF
1
0.1
0.1
0.01
0.1
1
10
100
0.01
0.1
1
10
100
0.001
0.01
0.1
1
10
100
FREQUENCY (kHz)
FORWARD CURRENT (mA)
REVERSE CURRENT (mA)
1634-4 G05
1634-2.5 G06
1635-4 G04
.41Hz to 1.Hz Noiꢄe
ꢁeꢄpoꢃꢄe Time
ꢁeꢄpoꢃꢄe Time
40
30
T
= –40°C TO 85°C
= 20μA
A
6V
4V
2V
0V
6V
I
R
4V
2V
0V
20
10
10V
0V
10V
0V
0
–10
–20
–30
–40
I
= 20μA
R
OUT
1634-4 G08
I
= 20μA
= 0
1634-4 G07
20ms/DIV
500μs/DIV
R
OUT
C
= 0.1μF
C
40 50
0
10 20 30
60 70 80
TIME (SEC)
1634-4 G06
1634fe
8
LT1634
5V TYPICAL PERFORMANCE CHARACTERISTICS
ꢁeverꢄe 6oltage Chaꢃge
vꢄ Curreꢃt
ꢁeverꢄe Characteriꢄticꢄ
Temperature Driꢂt
20
16
12
8
5
4
3
2
1
0
8
T
= –40°C TO 85°C
A
T
= –40°C TO 85°C
20μA
A
100μA
200μA
500μA
1mA
6
4
2
0
–2
–4
–6
4
0
–8
0
2
3
4
5
6
0.01
0.1
1
10
100
1
–20
0
40
60
80
–40
20
REVERSE CURRENT (mA)
REVERSE VOLTAGE (V)
TEMPERATURE (°C)
1634-5 G03
1634-5 G01
1634-5 G02
ꢁeverꢄe Dyꢃamic Impedaꢃce
Dyꢃamic Impedaꢃce vꢄ Frequeꢃcy
Forward Characteriꢄticꢄ
1.2
10000
1000
100
100
10
1
T
= 25°C
T
= 25°C
T
= 25°C
A
A
A
f = 25Hz
I
= 20μA
R
C
= 0μF
OUT
0.8
0.4
0
I
= 20μA
= 0.1μF
R
10
C
OUT
I
= 100μA
= 0.22μF
R
C
OUT
I
= 100μA
R
OUT
1
C
= 0μF
0.1
0.1
0.01
0.1
1
10
100
0.01
0.1
1
10
100
0.001
0.01
0.1
1
10
100
FREQUENCY (kHz)
FORWARD CURRENT (mA)
REVERSE CURRENT (mA)
1634-5 G05
1634-2.5 G06
1635-5 G04
.41Hz to 1.Hz Noiꢄe
ꢁeꢄpoꢃꢄe Time
ꢁeꢄpoꢃꢄe Time
40
30
T
I
= –40°C TO 85°C
= 20μA
A
6V
4V
2V
0V
6V
4V
2V
0V
R
20
10
10V
0V
10V
0V
0
–10
–20
–30
–40
I
= 20μA
OUT
1634-5 G08
20ms/DIV
I
= 20μA
= 0
1634-5 G07
R
500μs/DIV
R
OUT
C
= 0.1μF
C
40 50
10 20 30
TIME (SEC)
0
60 70 80
1634-5 G06
1634fe
9
LT1634
APPLICATIONS INFORMATION
The reverse characteristics of the LT1634 behave like
a resistor in parallel with a Zener diode. This simple,
well behaved characteristic is important to the proper
operation of circuits like Figure 1. The adjustable output
voltage reference depends upon positive feedback from
the LT1495’s output to start-up and regulate the bias cur-
rent for the LT1634.
V
IN
≥ 10.5V
V
– 1.25V
10μA
OUT
R
B
=
+
V
OUT
1.5V TO 10V
LT1495
LT1634-1.25
–
R1
50k TO 1.75M
R2
250k
1634 F01
Figure 14 Adjuꢄtable ꢀutput 6oltage ꢁeꢂereꢃce
TYPICAL APPLICATIONS
ꢁeꢂereꢃce ꢂor Micropower A/D Coꢃverter
The LT193±-5 Geꢃerateꢄ the LTC1±±8 Dual 12-Bit
DAC’ꢄ ꢁeꢂereꢃce aꢃd Supply 6oltage
5V
7.5V TO 12V
V
18k
LTC1286
IN
1
2
3
4
8
7
6
5
V
V
5V
REF
CC
3.48k
LTC1448
0.1μF
1
2
3
4
8
7
6
5
+IN
–IN
CLK
CLK
V
V
OUTB
OUTB
0.1μF
μC/μP
μC/μP
SERIAL
INTERFACE
LT1634-4.096
D
OUT
SERIAL
D
V
CC
IN
INTERFACE
0.1μF
GND CS/SHDN
LT1634-5
CS/LD
REF
GND
OUTA
1634 TA03
V
V
OUTA
0.1μF
1634 TA04
PACKAGE DESCRIPTION
S8 Package
8-Lead Plaꢄtic Small ꢀutliꢃe (Narrow .415. Iꢃch)
(Reference LTC DWG # 05-08-1610)
.045 .005
.050 BSC
.189 – .197
(4.801 – 5.004)
NOTE 3
.010 – .020
(0.254 – 0.508)
7
5
8
6
.160 .005
s 45°
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
.008 – .010
0°– 8° TYP
(0.203 – 0.254)
.150 – .157
(3.810 – 3.98
NOTE 3
.228 – .244
(5.791 – 6.197)
.030 .005
TYP
.016 – .050
(0.406 – 1.270)
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
OMMENDED SOLDER PAD LAYOUT
NOTE:
1. DIMENSIONS IN
INCHES
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
1
2
3
4
SO8 0303
1634fe
10
LT1634
PACKAGE DESCRIPTION
MS8 Package
8-Lead Plaꢄtic MSꢀP
(Reference LTC DWG # 05-08-1660)
0.889 p 0.127
(.035 p .005)
5.23
(.206)
MIN
3.20 – 3.45
(.126 – .136)
3.00 p 0.102
(.118 p .004)
(NOTE 3)
0.52
(.0205)
REF
0.65
(.0256)
BSC
0.42 p 0.038
(.0165 p .0015)
TYP
8
7 6
5
RECOMMENDED SOLDER PAD LAYOUT
3.00 p 0.102
(.118 p .004)
(NOTE 4)
4.90 p 0.152
(.193 p .006)
DETAIL “A”
0.254
(.010)
0° – 6° TYP
GAUGE PLANE
1
2
3
4
0.53 p 0.152
(.021 p .006)
1.10
(.043)
MAX
0.86
(.034)
REF
DETAIL “A”
0.18
(.007)
SEATING
PLANE
0.22 – 0.38
0.1016 p 0.0508
(.009 – .015)
(.004 p .002)
0.65
(.0256)
BSC
TYP
MSOP (MS8) 0307 REV F
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
Z Package
3-Lead Plaꢄtic Tꢀ-02 (Similar to Tꢀ-229)
(Reference LTC DWG # 05-08-1410)
.180 .005
(4.572 0.127)
.060 .005
(1.524 0.127)
DIA
.060 .010
.90
(1.524 0.254)
(2.286)
NOM
.180 .005
.140 .010
(3.556 0.127)
3
2
1
(4.572 0.127)
5°
NOM
10° NOM
.500
(12.70)
MIN
.050
(1.270)
MAX
UNCONTROLLED
LEAD DIMENSION
.016 .003
(0.406 0.076)
.015 .002
(0.381 0.051)
.050
(1.27)
BSC
.098 +.016/–.04
(2.5 +0.4/–0.1)
2 PLCS
Z3 (TO-92) 0801
TO-92 TAPE AND REEL
REFER TO TAPE AND REEL SECTION OF
LTC DATA BOOK FOR ADDITIONAL INFORMATIO
1634fe
11
LT1634
TYPICAL APPLICATIONS
Siꢃgle Cell Li-Ioꢃ Battery Superviꢄory Circuit (IQ = 2.μA)
OFF
CHARGER
V
BAT
SW
T0 LOAD
1.75V –
R3
1.75M
0.1%
A2
R
51k
5%
1/4 LT1496
S
R
10M
5%
R
1M
5%
H1
SW
+
+
D1
A1
A
BATTERY
1/4 LT1496
R1
500k
0.1%
R
H2
10M
5%
V
BAT
–
+
D2
A3
–
1/4 LT1496
1.25V
A4
–
1/4 LT1496
+
R2
LT1634-1.25
1.25M
0.1%
R4
1.25M
0.1%
1634 TA05
D1, D2: 1N458
R1 TO R4: CAR6 SERIES IRC (512) 992-7900
Micropower 6oltage aꢃd Curreꢃt ꢁeꢂereꢃce
R1 TO R3:
MAR5 SERIES, IRC
(512) 992-7900
R3
249k
0.1%
2 AAA
ALKALINE
CELLS
R4
24k
5%
–
+
+
ZTX214C
1/2 LT1495
1/2 LT1495
R1
200k
0.1%
R2
1M
0.1%
–
LT1634
1.25V
I
COM
V
OUT
1.5V
OUT
1634 TA06
1μA
RELATED PARTS
PAꢁT NUMBEꢁ
DESCꢁIPTIꢀN
CꢀMMENTS
LTC1440
Micropower Comparator with Reference
3.7μA Max Supply Current, 1% 1.182V Reference,
MSOP, PDIP and SO-8 Packages
LT1460
Micropower Series Reference
0.075% Max, 10ppm/°C Max Drift, 2.5V, 5V and 10V Versions,
MSOP, PDIP, SO-8, SOT-23 and TO-92 Packages
LT1495
1.5μA Precision Rail-to-Rail Dual Op Amp
Nanopower Comparator with Reference
1.5μA Max Supply Current, 100pA Max IOS
LTC1540
600nA Max Supply Current, 2% 1.182V Reference,
MSOP and SO-8 Packages
1634fe
LT 0409 REV E • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
12
●
●
© LINEAR TECHNOLOGY CORPORATION 1998
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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