LINER LT1634AIS8-4.096 Micropower precision shunt voltage reference Datasheet

LT1634
Micropower Precision
Shunt Voltage Reference
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DESCRIPTION
FEATURES
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Initial Voltage Accuracy: 0.05%
Low Operating Current: 10µA
Low Drift: 10ppm/°C Max
Less Than 1Ω Dynamic Impedance
Available in 1.25V, 2.5V, 4.096V and 5V in SO-8
and TO-92 Packages
1.25V and 2.5V Available in MSOP Package
Both Commercial and Industrial Temperature Range
Parts Are Available
The LT ®1634 is a micropower, precision, shunt voltage
reference. The bandgap reference uses trimmed precision
thin film resistors to achieve 0.05% initial voltage accuracy. Improved curvature correction technique guarantees 10ppm/°C maximum temperature drift. Advances in
design, processing and packaging techniques guarantee
10µA operation and low temperature cycling hysteresis.
The LT1634 does not require an output compensation
capacitor, but is stable with capacitive loads. Low dynamic
impedance makes the LT1634 reference easy to use from
unregulated supplies.
Portable Meters
Precision Regulators
A/D and D/A Converters
Calibrators
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.
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APPLICATIONS
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, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATION
Super Accurate ±4.096V Output References
5V
45k
+
LT1634-4.096
VOUT
4.096V
LT1495
Temperature Drift
–
2.0
– 5V
5
IS = 200µA
OUTPUT ACCURACY
BETTER THAN 0.075%
AT ±500µA OUTPUT
LTC®1043
REVERSE VOLTAGE CHANGE (mV)
5V
4
6
1µF
15
18
17
– 5V
IR = 10µA
VOUT = 1.25V
1.0
0.5
0
– 0.5
–1.0
–1.5
–2.0
– 40 –20
5V
–
LT1495
1.5
VOUT
– 4.096V
20
40
60
0
TEMPERATURE (°C)
80
100
1634 TA02
+
1µF
– 5V
1634 TA01
1
LT1634
W W
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ABSOLUTE MAXIMUM RATINGS
Operating Current
1.25V ............................................................. 100mA
2.5V ................................................................. 50mA
4.096V, 5V........................................................ 30mA
Forward Current................................................... 20mA
Operating Temperature Range
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
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W
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PACKAGE/ORDER INFORMATION
TOP VIEW
TOP VIEW
DNC*
DNC*
DNC*
GND
1
2
3
4
8
7
6
5
DNC*
DNC*
VOUT
TEST**
DNC* 1
8 DNC*
DNC* 2
7 DNC*
DNC* 3
6 VOUT
GND 4
MS8 PACKAGE
8-LEAD PLASTIC MSOP
5 TEST**
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 190°C/ W
TJMAX = 125°C, θJA = 250°C/ W
ORDER PART NUMBER
MS8 PART MARKING
ORDER PART NUMBER
S8 PART MARKING
LT1634BCMS8-1.25
LT1634BCMS8-2.5
LTCV
LTDF
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
634A1
634A2
634A4
634A5
634AI1
634AI2
634AI4
634AI5
634B1
634B2
634B4
634B5
634BI1
634BI2
634BI4
634BI5
BOTTOM VIEW
3
2
TEST** VOUT
1
GND
ORDER PART NUMBER
LT1634CCZ-1.25
LT1634CCZ-2.5
LT1634CCZ-4.096
LT1634CCZ-5
Z PACKAGE
3-LEAD PLASTIC TO-92
TJMAX = 125°C, θJA = 190°C/ W
*Connected internally. Do Not Connect external circuitry to these pins.
**Connect to ground in user application.
Consult factory for Military grade parts.
2
LT1634
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AVAILABLE OPTIO S
PACKAGE TYPE
ACCURACY (%)
TEMPERATURE COEFFICIENT
(ppm/°C)
0°C to 70°C
0.05
10
LT1634ACS8-1.25
LT1634ACS8-2.5
LT1634ACS8-4.096
LT1634ACS8-5
– 40°C to 85°C
0.05
10
LT1634AIS8-1.25
LT1634AIS8-2.5
LT1634AIS8-4.096
LT1634AIS8-5
0°C to 70°C
0.05
25
– 40°C to 85°C
0.05
25
0°C to 70°C
0.20
25
TEMPERATURE
MS8
LT1634BCMS8-1.25
LT1634BCMS8-2.5
1.25V ELECTRICAL CHARACTERISTICS
S8
Z
LT1634BCS8-1.25
LT1634BCS8-2.5
LT1634BCS8-4.096
LT1634BCS8-5
LT1634BIS8-1.25
LT1634BIS8-2.5
LT1634BIS8-4.096
LT1634BIS8-5
LT1634CCZ-1.25
LT1634CCZ-2.5
LT1634CCZ-4.096
LT1634CCZ-5
(Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
Reverse Breakdown Voltage
LT1634ACS8/LT1634BCMS8/LT1634BCS8/
LT1634AIS8/LT1634BIS8 (IR = 10µA)
1.24937
– 0.05
1.250
1.25062
0.05
V
%
LT1634CCZ (IR = 10µA)
1.24750
– 0.20
1.250
1.25250
0.20
V
%
Reverse Breakdown Change
with Current (Note 3)
UNITS
LT1634ACS8 (IR = 10µA)
●
1.24849
– 0.12
1.250
1.25149
0.12
V
%
LT1634AIS8 (IR = 10µA)
●
1.24781
– 0.175
1.250
1.25218
0.175
V
%
LT1634BCS8/LT1634BCMS8 (IR = 10µA)
●
1.24718
– 0.225
1.250
1.25281
0.225
V
%
LT1634BIS8 (IR = 10µA)
●
1.24547
– 0.362
1.250
1.25453
0.362
V
%
LT1634CCZ (IR = 10µA)
●
1.24531
– 0.375
1.250
1.25469
0.375
V
%
●
0.25
0.30
1
2
mV
mV
●
2
2
8
10
mV
mV
7
µA
10µA ≤ IR ≤ 2mA
2mA ≤ IR ≤ 20mA
Minimum Operating Current
●
Temperature Coefficient
LT1634A, IR = 10µA
LT1634B, IR = 10µA
Reverse Dynamic Impedance (Note 4)
10µA ≤ IR ≤ 2mA
●
●
4
10
10
25
ppm/°C
ppm/°C
●
0.125
0.150
0.5
1.0
Ω
Ω
Low Frequency Noise (Note 5)
IR = 10µA, 0.1Hz ≤ f ≤ 10Hz
10
µVP-P
Hysteresis (Note 6)
∆T = – 40°C to 85°C
∆T = 0°C to 70°C
160
40
ppm
ppm
3
LT1634
2.5V ELECTRICAL CHARACTERISTICS
(Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
Reverse Breakdown Voltage
LT1634ACS8/LT1634BCMS8/LT1634BCS8/
LT1634AIS8/LT1634BIS8 (IR = 10µA)
2.49875
– 0.05
2.500
2.50125
0.05
V
%
LT1634CCZ (IR = 10µA)
2.49500
– 0.20
2.500
2.50500
0.20
V
%
Reverse Breakdown Change
with Current (Note 3)
UNITS
LT1634ACS8 (IR = 10µA)
●
2.49700
– 0.12
2.500
2.50300
0.12
V
%
LT1634AIS8 (IR = 10µA)
●
2.49562
– 0.175
2.500
2.50437
0.175
V
%
LT1634BCMS8/LT1634BCS8 (IR = 10µA)
●
2.49437
– 0.225
2.500
2.50562
0.225
V
%
LT1634BIS8 (IR = 10µA)
●
2.49094
– 0.362
2.500
2.50906
0.362
V
%
LT1634CCZ (IR = 10µA)
●
2.49062
– 0.375
2.500
2.50937
0.375
V
%
●
0.30
0.40
1.5
3.0
mV
mV
●
2
2
8
10
mV
mV
8
µA
ppm/°C
ppm/°C
10µA ≤ IR ≤ 2mA
2mA ≤ IR ≤ 20mA
Minimum Operating Current
●
Temperature Coefficient
LT1634A, IR = 10µA
LT1634B, IR = 10µA
Reverse Dynamic Impedance (Note 4)
10µA ≤ IR ≤ 2mA
●
●
4
10
10
25
●
0.15
0.20
0.75
1.50
Ω
Ω
Low Frequency Noise (Note 5)
IR = 10µA, 0.1Hz ≤ f ≤ 10Hz
15
µVP-P
Hysteresis (Note 6)
∆T = – 40°C to 85°C
∆T = 0°C to 70°C
160
40
ppm
ppm
4.096V ELECTRICAL CHARACTERISTICS
(Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
Reverse Breakdown Voltage
LT1634ACS8/LT1634BCS8/
LT1634AIS8/LT1634BIS8 (IR = 20µA)
4.09395
– 0.05
4.096
4.09805
0.05
V
%
LT1634CCZ (IR = 20µA)
4.08780
– 0.20
4.096
4.10419
0.20
V
%
Reverse Breakdown Change
with Current (Note 3)
LT1634ACS8 (IR = 20µA)
●
4.09108
– 0.12
4.096
4.10091
0.12
V
%
LT1634AIS8 (IR = 20µA)
●
4.08883
– 0.175
4.096
4.10317
0.175
V
%
LT1634BCS8 (IR = 20µA)
●
4.08678
– 0.225
4.096
4.10522
0.225
V
%
LT1634BIS8 (IR = 20µA)
●
4.08115
– 0.362
4.096
4.11085
0.362
V
%
LT1634CCZ (IR = 20µA)
●
4.08064
– 0.375
4.096
4.11137
0.375
V
%
●
0.3
0.4
1.5
3.0
mV
mV
●
2
2
8
10
mV
mV
15
µA
20µA ≤ IR ≤ 2mA
2mA ≤ IR ≤ 20mA
Minimum Operating Current
4
UNITS
●
LT1634
4.096V ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
Temperature Coefficient
LT1634A, IR = 20µA
LT1634B, IR = 20µA
Reverse Dynamic Impedance (Note 4)
20µA ≤ IR ≤ 2mA
(Note 2)
MIN
TYP
MAX
UNITS
●
●
4
10
10
25
ppm/°C
ppm/°C
●
0.15
0.20
0.75
1.50
Ω
Ω
Low Frequency Noise (Note 5)
IR = 20µA, 0.1Hz ≤ f ≤ 10Hz
30
µVP-P
Hysteresis (Note 6)
∆T = – 40°C to 85°C
∆T = 0°C to 70°C
160
40
ppm
ppm
5V ELECTRICAL CHARACTERISTICS
(Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
Reverse Breakdown Voltage
LT1634ACS8/LT1634BCS8/
LT1634AIS8/LT1634BIS8 (IR = 20µA)
4.99750
– 0.05
5.000
5.00250
0.05
V
%
LT1634CCZ (IR = 20µA)
4.99000
– 0.20
5.000
5.01000
0.20
V
%
Reverse Breakdown Change
with Current (Note 3)
UNITS
LT1634ACS8 (IR = 20µA)
●
4.99400
– 0.12
5.000
5.00600
0.12
V
%
LT1634AIS8 (IR = 20µA)
●
4.99125
– 0.175
5.000
5.00875
0.175
V
%
LT1634BCS8 (IR = 20µA)
●
4.98875
– 0.225
5.000
5.01125
0.225
V
%
LT1634BIS8 (IR = 20µA)
●
498188
– 0.362
5.000
5.01813
0.362
V
%
LT1634CCZ (IR = 20µA)
●
4.98126
– 0.375
5.000
5.01876
0.375
V
%
●
0.3
0.4
1.5
3.0
mV
mV
●
2
2
8
10
mV
mV
15
µA
ppm/°C
ppm/°C
20µA ≤ IR ≤ 2mA
2mA ≤ IR ≤ 20mA
Minimum Operating Current
●
Temperature Coefficient
LT1634A, IR = 20µA
LT1634B, IR = 20µA
Reverse Dynamic Impedance (Note 4)
20µA ≤ IR ≤ 2mA
●
●
4
10
10
25
●
0.15
0.20
0.75
1.50
Ω
Ω
Low Frequency Noise (Note 5)
IR = 20µA, 0.1Hz ≤ f ≤ 10Hz
35
µVP-P
Hysteresis (Note 6)
∆T = – 40°C to 85°C
∆T = 0°C to 70°C
160
40
ppm
ppm
The ● denotes specifications which apply over the full operating
temperature range.
Note 1: If the part is stored outside of the specific operating temperature
range, the output may shift due to hysteresis.
Note 2: ESD (Electrostatic Discharge) sensitive device. Use proper ESD
handling precautions.
Note 3: Output requires 0.1µF for operating current greater than 1mA.
Note 4: This parameter is guaranteed by “reverse breakdown change with
current” test.
Note 5: Peak-to-peak noise is measured with a single highpass filter at
0.1Hz and 2-pole lowpass filter at 10Hz.
Note 6: 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.
5
LT1634
U W
1.25V TYPICAL PERFOR A CE CHARACTERISTICS
10µA
100µA
200µA
500µA
1mA
REVERSE VOLTAGE CHANGE (mV)
1.5
6
4
2
0.8
0.4
1.2
REVERSE VOLTAGE (V)
0
1.0
TA = – 40°C TO 85°C
REVERSE VOLTAGE CHANGE (mV)
TA = – 40°C TO 85°C
8
0.5
0
– 0.5
–1.0
–1.5
–2.0
– 40
1.6
–20
20
40
0
TEMPERATURE (°C)
60
1
TA = 25°C
f = 25Hz
Forward Characteristics
TA = 25°C
DYNAMIC IMPEDANCE (Ω)
TA = 25°C
1
0.01
10
0.1
1
REVERSE CURRENT (mA)
100
1.2
10000
10
0.1
1
10
REVERSE CURRENT (mA)
1634-1.25 G03
Dynamic Impedance vs Frequency
Reverse Dynamic Impedance
100
DYNAMIC IMPEDANCE (Ω)
2
1634-1.25 TA02
1634-1.25 G01
0.1
0.001
3
0
0.01
80
1000
100
10
IR = 10µA
COUT = 0.022µF
IR = 100µA
COUT = 0.47µF
0.8
0.4
IR = 100µA
COUT = 0µF
1
0.1
0.01
100
IR = 10µA
COUT = 0µF
FORWARD VOLTAGE (V)
REVERSE CURRENT (µA)
4
2.0
10
0
Reverse Voltage Change
vs Current
Temperature Drift
Reverse Characteristics
0.1
1
10
FREQUENCY (kHz)
1634-1.25 G04
0
0.01
100
0.1
1
10
FORWARD CURRENT (mA)
1634-1.25 G06
1634-1.25 G05
Response Time
0.1Hz to 10Hz Noise
100
Response Time
8
NOISE VOLTAGE (µV/DIV)
TA = – 40°C TO 85°C
6 IR = 10µA
4
2
1.5V
0.5V
0V
0.5V
1V
OUT
5V
0V
0
–2
–6
–8
0
10
20
30
40
50
TIME (SEC)
60
70
1634-1.25 G07
OUT
0V
5V
IN
IR = 10µA
COUT = 0
–4
6
1.5V
1V
200µs/DIV
1634-1.25 G08
0V
IN
IR = 10µA
COUT = 0.1µF
20ms/DIV
1634-1.25 G09
LT1634
U W
2.5V TYPICAL PERFOR A CE CHARACTERISTICS
Reverse Characteristics
6
4
REVERSE VOLTAGE CHANGE (mV)
8
6
4
2
0.5
0
1.5
2.0
1.0
REVERSE VOLTAGE (V)
2.5
3
2
1
0
–1
–2
–3
–4
– 40
0
3.0
TA = – 40°C TO 85°C
10µA
100µA
200µA
500µA
1mA
TA = – 40°C TO 85°C
REVERSE VOLTAGE CHANGE (mV)
10
–20
20
40
0
TEMPERATURE (°C)
60
Reverse Dynamic Impedance
10
1
0.01
0.1
1
10
REVERSE CURRENT (mA)
100
TA = 25°C
IR = 10µA
COUT = 0µF
100
IR = 10µA
COUT = 0.068µF
IR = 100µA
COUT = 0.47µF
10
IR = 100µA
COUT = 0µF
1
0.1
0.01
0.1
1
10
FREQUENCY (kHz)
100
0.8
0.4
0
0.01
5
0
1634-2.5 G06
3V
3V
2V
2V
1V
1V
0V
0V
5V
5V
0V
0V
IR = 10µA
COUT = 0
200µs/DIV
100
Response Time
–5
–10
0.1
1
10
FORWARD CURRENT (mA)
1634-2.5 G05
Response Time
10
100
1000
0.1Hz to 10Hz Noise
TA = – 40°C TO 85°C
IR = 10µA
0.1
1
10
REVERSE CURRENT (mA)
Forward Characteristics
TA = 25°C
DYNAMIC IMPEDANCE (Ω)
DYNAMIC IMPEDANCE (Ω)
1
1.2
1635-2.5 G04
NOISE VOLTAGE (µV/DIV)
2
Dynamic Impedance vs Frequency
TA = 25°C
f = 25Hz
15
3
1634-2.5 G03
10000
100
20
4
1634-2.5 G02
1634-2.5 G01
0.1
0.001
5
0
0.01
80
FORWARD VOLTAGE (V)
REVERSE CURRENT (µA)
Reverse Voltage Change
vs Current
Temperature Drift
1634-2.5 G08
IR = 10µA
COUT = 0.1µF
20ms/DIV
1634-2.5 G09
–15
–20
0
10
20
30
40
50
60
70
80
TIME (SEC)
1634-2.5 G07
7
LT1634
U W
4.096V TYPICAL PERFOR A CE CHARACTERISTICS
6
5
REVERSE VOLTAGE CHANGE (mV)
16
12
8
4
0
4
2
0
–2
–4
–6
– 40
5
2
3
4
REVERSE VOLTAGE (V)
1
20µA
100µA
200µA
500µA
1mA
– 20
0
40
20
TEMPERATURE (°C)
1634-4 G01
3
2
1
DYNAMIC IMPEDANCE (Ω)
0.01
0.1
1
10
REVERSE CURRENT (mA)
100
Forward Characteristics
TA = 25°C
IR = 20µA
COUT = 0µF
1000
100
IR = 20µA
COUT = 0.033µF
10
IR = 100µA
COUT = 0.33µF
IR = 100µA
COUT = 0µF
1
0.1
0.01
0.1
1
10
FREQUENCY (kHz)
100
0.8
0.4
0
0.01
0.1
1
10
FORWARD CURRENT (mA)
1634-4 G05
1635-4 G04
0.1Hz to 10Hz Noise
100
1.2
TA = 25°C
1
0.1
1
10
REVERSE CURRENT (mA)
1634-4 G03
Dynamic Impedance vs Frequency
TA = 25°C
f = 25Hz
0.1
0.001
4
0
0.01
80
10000
10
TA = – 40°C TO 85°C
1634-4 G02
Reverse Dynamic Impedance
100
DYNAMIC IMPEDANCE (Ω)
60
FORWARD VOLTAGE (V)
REVERSE CURRENT (µA)
TA = – 40°C to 85°C
REVERSE VOLTAGE CHANGE (mV)
20
0
Reverse Voltage Change
vs Current
Temperature Drift
Reverse Characteristics
100
1634-2.5 G06
Response Time
Response Time
40
TA = – 40°C TO 85°C
IR = 20µA
NOISE VOLTAGE (µV/DIV)
30
6V
20
10
0
4V
6V
4V
2V
2V
0V
0V
10V
10V
0V
0V
–10
IR = 20µA
COUT = 0
– 20
– 30
– 40
0
10
20
30 40 50
TIME (SEC)
60
70
80
1634-4 G06
8
500µs/DIV
1634-4 G07
IR = 20µA
COUT = 0.1µF
20ms/DIV
1634-2.5 G08
LT1634
U W
5V TYPICAL PERFOR A CE CHARACTERISTICS
Reverse Characteristics
20
8
5
16
12
8
4
0
2
3
4
REVERSE VOLTAGE (V)
1
5
6
4
2
0
–2
–4
–6
–8
– 40
6
TA = –40°C TO 85°C
20µA
100µA
200µA
500µA
1mA
REVERSE VOLTAGE CHANGE (mV)
REVERSE VOLTAGE CHANGE (mV)
– 20
0
40
20
TEMPERATURE (°C)
60
1634-5 G01
DYNAMIC IMPEDANCE (Ω)
DYNAMIC IMPEDANCE (Ω)
1
0.01
0.1
1
10
REVERSE CURRENT (mA)
100
TA = 25°C
1000
IR = 20µA
COUT = 0µF
100
10
IR = 100µA
COUT = 0µF
1
0.1
0.01
0.1
IR = 20µA
COUT = 0.1µF
IR = 100µA
COUT = 0.22µF
1
10
FREQUENCY (kHz)
100
0.8
0.4
0
0.01
20
10
0
Response Time
6V
4V
6V
2V
2V
0V
0V
10V
10V
0V
0V
4V
–10
IR = 20µA
COUT = 0
– 20
100
1634-2.5 G06
Response Time
TA = – 40°C TO 85°C
IR = 20µA
0.1
1
10
FORWARD CURRENT (mA)
1634-5 G05
0.1Hz to 10Hz Noise
100
Forward Characteristics
TA = 25°C
10
0.1
1
10
REVERSE CURRENT (mA)
1.2
1635-5 G04
NOISE VOLTAGE (µV/DIV)
1
Dynamic Impedance vs Frequency
TA = 25°C
f = 25Hz
30
2
1634-5 G03
10000
40
3
1634-5 G02
Reverse Dynamic Impedance
100
0.1
0.001
4
0
0.01
80
FORWARD VOLTAGE (V)
REVERSE CURRENT (µA)
TA = – 40°C TO 85°C
0
Reverse Voltage Change
vs Current
Temperature Drift
500µs/DIV
1634-5 G07
IR = 20µA
COUT = 0.1µF
20ms/DIV
1634-5 G08
–30
– 40
0
10
20
30 40 50
TIME (SEC)
60
70
80
1634-5 G06
9
LT1634
U
U
W
U
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 current
for the LT1634.
VIN ≥ 10.5V
– 1.25V
V
RB = OUT
10µA
+
VOUT
1.5V TO 10V
LT1495
LT1634-1.25
–
R1
50k TO 1.75M
R2
250k
1634 F01
Figure 1. Adjustable Output Voltage Reference
U
TYPICAL APPLICATIONS
Reference for Micropower A/D Converter
5V
VIN
18k
LTC1286
1
2
LT1634-4.096
0.1µF
3
4
VREF
VCC
+ IN
CLK
– IN
DOUT
8
5V
7
0.1µF
µC/µP
SERIAL
INTERFACE
6
5
GND CS/SHDN
1634 TA03
The LT1634-5 Generates the LTC1448 Dual 12-Bit
DAC’s Reference and Supply Voltage
7.5V TO 12V
3.48k
LTC1448
1
LT1634-5
µC/µP
SERIAL
INTERFACE
2
3
4
0.1µF
10
CLK
VOUTB
DIN
VCC
CS/LD
REF
GND
VOUTA
8
VOUTB
7
6
5
0.1µF
VOUTA
1634 TA04
LT1634
U
PACKAGE DESCRIPTION
Dimensions in inches (millimeters) unless otherwise noted.
MS8 Package
8-Lead Plastic MSOP
(LTC DWG # 05-08-1660)
0.118 ± 0.004*
(3.00 ± 0.102)
0.040 ± 0.006
(1.02 ± 0.15)
0.007
(0.18)
0.034 ± 0.004
(0.86 ± 0.102)
8
7 6
5
0° – 6° TYP
SEATING
PLANE 0.012
(0.30)
0.0256
REF
(0.65)
TYP
0.021 ± 0.006
(0.53 ± 0.015)
0.006 ± 0.004
(0.15 ± 0.102)
0.118 ± 0.004**
(3.00 ± 0.102)
0.192 ± 0.004
(4.88 ± 0.10)
MSOP (MS8) 1197
1
* DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH,
PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
2 3
4
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 – 0.197*
(4.801 – 5.004)
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)
7
8
0.004 – 0.010
(0.101 – 0.254)
6
5
0°– 8° TYP
0.016 – 0.050
0.406 – 1.270
0.050
(1.270)
TYP
0.014 – 0.019
(0.355 – 0.483)
0.150 – 0.157**
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
*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
SO8 0996
1
2
3
4
Z Package
3-Lead Plastic TO-92 (Similar to TO-226)
(LTC DWG # 05-08-1410)
0.060 ± 0.005
(1.524± 0.127)
DIA
0.180 ± 0.005
(4.572 ± 0.127)
0.180 ± 0.005
(4.572 ± 0.127)
0.060 ± 0.010
(1.524 ± 0.254)
0.90
(2.286)
NOM
0.140 ± 0.010
(3.556 ± 0.127)
Z3 (TO-92) 0695
0.500
(12.70)
MIN
0.050 ± 0.005
(1.270 ± 0.127)
0.050 UNCONTROLLED
(1.270) LEAD DIMENSION
MAX
0.016 ± 0.003
(0.406 ± 0.076)
5°
NOM
10° NOM
0.015 ± 0.002
(0.381 ± 0.051)
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.
11
LT1634
U
TYPICAL APPLICATIONS
Single Cell Li-Ion Battery Supervisory Circuit (IQ = 20µA)
OFF
CHARGER
VBAT
SW
T0 LOAD
1.75V
–
A2
1/4 LT1496
RS
51k
5%
+
+
A1
1/4 LT1496
R1
500k
0.1%
–
1.25V
VBAT
+
A3
1/4 LT1496
RH1
10M
5%
D1
RH2
10M
5%
D2
A
RSW
1M
5%
BATTERY
–
A4
1/4 LT1496
–
+
R2
1.25M
0.1%
LT1634-1.25
R3
1.75M
0.1%
R4
1.25M
0.1%
1634 TA05
D1, D2: 1N458
R1 TO R4: CAR6 SERIES IRC (512) 992-7900
Micropower Voltage and Current Reference
R3
249k
0.1%
2 AAA
ALKALINE
CELLS
R4
24k
5%
–
ZTX214C
1/2 LT1495
R1 TO R3:
MAR5 SERIES, IRC
(512) 992-7900
+
1/2 LT1495
+
–
LT1634
1.25V
IOUT = 1µA
COM
VOUT = 1.5V
R1
200k
0.1%
R2
1M
0.1%
1634 TA06
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
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
1.5µA Max Supply Current, 100pA Max IOS
LTC1540
Nanopower Comparator with Reference
600nA Max Supply Current, 2% 1.182V Reference,
MSOP and SO-8 Packages
12
Linear Technology Corporation
1634fa LT/TP 0698 2K REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 ● FAX: (408) 434-0507 ● www.linear-tech.com
 LINEAR TECHNOLOGY CORPORATION 1998
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