LT1460MHS8-5#PBF [Linear]
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| 型号： | LT1460MHS8-5#PBF |
| 厂家： | 
Linear |
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LT1460
Micropower Precision
Series Reference Family
U
DESCRIPTIO
FEATURES
The LT®1460 is a micropower bandgap reference that
combines very high accuracy and low drift with low power
dissipation and small package size. This series reference
uses curvature compensation to obtain low temperature
coefficient and trimmed precision thin-film resistors to
achieve high output accuracy. The reference will supply
up to 20mA with excellent line regulation characteristics,
making it ideal for precision regulator applications.
■
Trimmed to High Accuracy: 0.075% Max
■
Low Drift: 10ppm/°C Max
■
Industrial Temperature Range
■
Temperature Coefficient Guaranteed to 125°C
■
Low Supply Current: 130µA Max (LT1460-2.5)
■
Minimum Output Current: 20mA
■
No Output Capacitor Required
■
Reverse Battery Protection
■
Minimum Input/Output Differential: 0.9V
This series reference provides supply current and power
dissipationadvantagesovershuntreferencesthatmustidle
the entire load current to operate. Additionally, the LT1460
does not require an output compensation capacitor, yet
is stable with capacitive loads. This feature is important
where PC board space is a premium or fast settling is
demanded. In the event of a reverse battery connection,
thesereferenceswillnotconductcurrent,andaretherefore
protected from damage.
■
Available in S0-8, MSOP-8, PDIP-8, TO-92 and
SOT- 23 Package
U
APPLICATIO S
■
Handheld Instruments
■
Precision Regulators
■
A/D and D/A Converters
Power Supplies
Hard Disk Drives
■
The LT1460 is available in the 8-lead MSOP, SO, PDIP and
the 3-lead TO-92 and SOT23 packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
■
U
TYPICAL APPLICATIO
Typical Distribution of Output Voltage
S8 Package
Basic Connection
20
1400 PARTS
18
LT1460-2.5
3.4V
FROM 2 RUNS
16
2.5V
IN
OUT
TO 20V
C1
0.1µF
GND
14
12
10
8
1460 TA01
6
4
2
0
–0.10
–0.06 –0.02 0 0.02
0.06
0.10
OUTPUT VOLTAGE ERROR (%)
1460 TA02
1460f
1
LT1460
W W U W
ABSOLUTE AXI U RATI GS
(Note 1)
Input Voltage.............................................................30V
Reverse Voltage ......................................................–15V
Specified Temperature Range
Commercial (C)........................................ 0°C to 70°C
Industrial (I)......................................... –40°C to 85°C
High (H)............................................. –40°C to 125°C
Storage Temperature Range (Note 2)..... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
Output Short-Circuit Duration, T = 25°C
A
V > 10V............................................................5 sec
IN
V ≤ 10V..................................................... Indefinite
IN
U
W
U
PACKAGE/ORDER I FOR ATIO
†
ORDER PART NUMBER
S3 PART MARKING
LT1460HCS3-2.5
LT1460JCS3-2.5
LT1460KCS3-2.5
LT1460HCS3-3
LT1460JCS3-3
LT1460KCS3-3
LT1460HCS3-3.3
LT1460JCS3-3.3
LT1460KCS3-3.3
LT1460HCS3-5
LT1460JCS3-5
LT1460KCS3-5
LT1460HCS3-10
LT1460JCS3-10
LT1460KCS3-10
†
LTAC
LTAD OR LTH8*
}
LTAE
LTAN
LTAP OR LTH9*
LTAQ
LTAR
LTAS OR LTJ1*
LTAT
LTAK
LTAL OR LTJ2*
LTAM
LTAU
LTAV OR LTJ3*
LTAW
TOP VIEW
IN 1
3 GND
OUT 2
}
S3 PACKAGE
3-LEAD PLASTIC SOT-23
}
T
= 125°C, θ = 325°C/W
JA
JMAX
}
}
*The temperature grades and parametric grades are identified by a label on the shipping container. Product may be identified with either part marking.
1460f
2
LT1460
U
W
U
PACKAGE/ORDER I FOR ATIO
ORDER PART NUMBER
LT1460ACN8-2.5
LT1460BIN8-2.5
LT1460DCN8-2.5
LT1460EIN8-2.5
TOP VIEW
DNC*
1
2
3
4
DNC*
DNC*
8
7
6
5
V
IN
DNC*
GND
V
OUT
LT1460ACN8-5
LT1460BIN8-5
LT1460DCN8-5
LT1460EIN8-5
DNC*
N8 PACKAGE
8-LEAD PLASTIC DIP
*CONNECTED INTERNALLY.
DO NOT CONNECT EXTERNAL CIRCUITRY TO THESE PINS
LT1460ACN8-10
LT1460BIN8-10
LT1460DCN8-10
LT1460EIN8-10
T
= 150°C, θ = 130°C/W
JMAX
JA
ORDER PART NUMBER
S8 PART MARKING
LT1460ACS8-2.5
LT1460BIS8-2.5
LT1460DCS8-2.5
LT1460EIS8-2.5
LT1460LHS8-2.5
LT1460MHS8-2.5
1460A2
460BI2
1460D2
460EI2
60LH25
60MH25
TOP VIEW
DNC*
1
2
3
4
8
7
6
5
DNC*
V
DNC*
IN
DNC*
GND
V
OUT
LT1460ACS8-5
LT1460BIS8-5
LT1460DCS8-5
LT1460EIS8-5
LT1460LHS8-5
LT1460MHS8-5
1460A5
460BI5
1460D5
460EI5
460LH5
460MH5
DNC*
S8 PACKAGE
8-LEAD PLASTIC SO
*CONNECTED INTERNALLY.
DO NOT CONNECT EXTERNAL CIRCUITRY TO THESE PINS
T
= 150°C, θ = 190°C/W
JA
JMAX
LT1460ACS8-10
LT1460BIS8-10
LT1460DCS8-10
LT1460EIS8-10
1460A1
460BI1
1460D1
460EI1
1460f
3
LT1460
U
W
U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
BOTTOM VIEW
DNC* 1
8 DNC*
7 DNC*
3
2
1
V
IN
2
6 V
DNC* 3
GND 4
OUT
V
IN
V
GND
OUT
5 DNC*
MS8 PACKAGE
8-LEAD PLASTIC MSOP
*CONNECTED INTERNALLY.
DO NOT CONNECT EXTERNAL
CIRCUITRY TO THESE PINS
Z PACKAGE
3-LEAD TO-92 PLASTIC
= 150°C, θ = 160°C/W
T
JMAX
JA
T
= 150°C, θ = 250°C/W
JA
JMAX
ORDER PART NUMBER
MS8 PART MARKING
ORDER PART NUMBER
LT1460CCMS8-2.5
LT1460FCMS8-2.5
LT1460CCMS8-5
LT1460FCMS8-5
LT1460CCMS8-10
LT1460FCMS8-10
LTAA
LTAB
LTAF
LTAG
LTAH
LTAJ
LT1460GCZ-2.5
LT1460GIZ-2.5
LT1460GCZ-5
LT1460GIZ-5
LT1460GCZ-10
LT1460GIZ-10
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
AVAILABLE OPTIONS
TEMPERATURE
PACKAGE TYPE
ACCURACY COEFFICIENT
N8
S8
MS8
Z
S3
TEMPERATURE
0°C to 70°C
(%)
0.075
0.10
0.10
0.10
0.125
0.15
0.25
0.25
0.20
0.20
0.20
0.40
0.50
(ppm/°C)
10
LT1460ACN8
LT1460BIN8
LT1460ACS8
LT1460BIS8
–40°C to 85°C
0°C to 70°C
10
15
LT1460CCMS8
LT1460FCMS8
0°C to 70°C
20
LT1460DCN8
LT1460EIN8
LT1460DCS8
LT1460EIS8
–40°C to 85°C
0°C to 70°C
20
25
0°C to 70°C
25
LT1460GCZ
LT1460GIZ
–40°C to 85°C
–40°C to 85°C/125°C
–40°C to 125°C
0°C to 70°C
25
20/50
50
LT1460LHS8
LT1460MHS8
20
LT1460HCS3
LT1460JCS3
LT1460KCS3
0°C to 70°C
20
0°C to 70°C
50
1460f
4
LT1460
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = VOUT + 2.5V, IOUT = 0 unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage
LT1460ACN8-2.5, ACS8-2.5
2.49813
–0.075
2.50188
0.075
V
%
LT1460BIN8-2.5, BIS8-2.5, CCMS8-2.5,
DCN8-2.5, DCS8-2.5
2.4975
–0.10
2.5025
0.10
V
%
LT1460EIN8-2.5, EIS8-2.5
2.49688
–0.125
2.50313
0.125
V
%
LT1460FCMS8-2.5
2.49625
–0.15
2.50375
0.15
V
%
LT1460GCZ-2.5, GIZ-2.5
LT1460LHS8-2.5, MHS8-2.5
LT1460ACN8-5, ACS8-5
2.49375
–0.25
2.50625
0.25
V
%
2.495
–0.20
2.505
0.20
V
%
4.99625
–0.075
5.00375
0.075
V
%
LT1460BIN8-5, BIS8-5, CCMS8-5,
DCN8-5, DCS8-5
4.995
–0.10
5.005
0.10
V
%
LT1460EIN8-5, EIS8-5
4.99375
–0.125
5.00625
0.125
V
%
LT1460FCMS8-5
4.9925
–0.15
5.0075
0.15
V
%
LT1460GCZ-5, GIZ-5
LT1460LHS8-5, MHS8-5
LT1460ACN8-10, ACS8-10
4.9875
–0.25
5.0125
0.25
V
%
4.990
–0.20
5.010
0.20
V
%
9.9925
–0.075
10.0075
0.075
V
%
LT1460BIN8-10, BIS8-10, CCMS8-10,
DCN8-10, DCS8-10
9.990
–0.10
10.010
0.10
V
%
LT1460EIN8-10, EIS8-10
9.9875
–0.125
10.0125
0.125
V
%
LT1460FCMS8-10
9.985
–0.15
10.0015
0.15
V
%
LT1460GCZ-10, GIZ-10
9.975
–0.25
10.025
0.25
V
%
LT1460HC
LT1460JC
LT1460KC
–0.2
–0.4
–0.5
0.2
0.4
0.5
%
%
%
Output Voltage Temperature Coefficient (Note 3)
T
≤ T ≤ T
MIN J MAX
LT1460ACN8, ACS8, BIN8, BIS8
LT1460CCMS8
●
●
●
●
●
●
●
5
10
15
20
25
20
50
50
ppm/°C
ppm/°C
ppm/°C
ppm/°C
ppm/°C
ppm/°C
ppm/°C
7
LT1460DCN8, DCS8, EIN8, EIS8
LT1460FCMS8, GCZ, GIZ
LT1460LHS8
10
12
10
25
25
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
LT1460MHS8
●
●
●
LT1460HC
LT1460JC
LT1460KC
10
10
25
20
20
50
ppm/°C
ppm/°C
ppm/°C
1460f
5
LT1460
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = VOUT + 2.5V, IOUT = 0 unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Line Regulation
V
V
V
V
+ 0.9V ≤ V ≤ V
OUT
+ 2.5V
30
60
80
ppm/V
ppm/V
OUT
OUT
OUT
OUT
OUT
OUT
OUT
IN
●
●
●
●
●
●
●
●
●
●
LT1460A, LT1460B, LT1460C, LT1460D, LT1460E,
LT1460F, LT1460G, LT1460H, LT1460L, LT1460M
+ 2.5V ≤ V ≤ 20V
10
150
50
25
35
ppm/V
ppm/V
IN
LT1460HC, LT1460JC, LT1460KC
+ 0.9V ≤ V ≤ V
+ 2.5V
800
1000
ppm/V
ppm/V
IN
OUT
+ 2.5V ≤ V ≤ 20V
100
130
ppm/V
ppm/V
IN
Load Regulation Sourcing (Note 4)
I
I
I
I
I
I
= 100µA
= 10mA
= 20mA
1500
80
2800
3500
ppm/mA
ppm/mA
LT1460A, LT1460B, LT1460C, LT1460D, LT1460E,
LT1460F, LT1460G, LT1460H, LT1460L, LT1460M
135
180
ppm/mA
ppm/mA
70
100
140
ppm/mA
ppm/mA
0°C to 70°C
LT1460HC, LT1460JC, LT1460KC
= 100µA
= 10mA
= 20mA
1000
50
3000
4000
ppm/mA
ppm/mA
OUT
OUT
OUT
200
300
ppm/mA
ppm/mA
20
70
100
ppm/mA
ppm/mA
Thermal Regulation (Note 5)
ΔP = 200mW
0.5
2.5
ppm/mW
LT1460A, LT1460B, LT1460C, LT1460D, LT1460E,
LT1460F, LT1460G, LT1460H, LT1460L, LT1460M
LT1460HC, LT1460JC, LT1460KC
Dropout Voltage (Note 6)
ΔP = 200mW
2.5
10
ppm/mW
V
●
●
V
V
– V , I
= 0
0.9
IN
OUT OUT
– V , I
= 10mA
1.3
1.4
V
V
IN
OUT OUT
Output Current
Reverse Leakage
Supply Current
Short V
to GND
40
0.5
100
mA
µA
OUT
●
●
●
●
●
●
●
●
●
V
= –15V
10
IN
LT1460-2.5
130
165
µA
µA
LT1460-5
125
190
115
145
145
160
215
175
225
µA
µA
LT1460-10
270
360
µA
µA
LT1460S3-2.5
LT1460S3-3
LT1460S3-3.3
LT1460S3-5
LT1460S3-10
145
175
µA
µA
180
220
µA
µA
180
220
µA
µA
200
240
µA
µA
270
350
µA
µA
1460f
6
LT1460
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = VOUT + 2.5V, IOUT = 0 unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
µV
Output Voltage Noise (Note 7)
LT1460-2.5
0.1Hz ≤ f ≤ 10Hz
10Hz ≤ f ≤ 1kHz
10
10
P-P
LT1460A, LT1460B, LT1460C, LT1460D, LT1460E,
LT1460F, LT1460G, LT1460H, LT1460L, LT1460M
µV
µV
µV
RMS
LT1460-5
0.1Hz ≤ f ≤ 10Hz
10Hz ≤ f ≤ 1kHz
20
20
µV
P-P
RMS
LT1460-10
0.1Hz ≤ f ≤ 10Hz
10Hz ≤ f ≤ 1kHz
40
35
µV
P-P
RMS
LT1460HC, LT1460JC, LT1460KC
0.1Hz ≤ f ≤ 10Hz
10Hz ≤ f ≤ 1kHz
4
4
ppm (P-P)
ppm (RMS)
Long-Term Stability of Output Voltage (Note 8)
S8 Pkg
40
ppm/√kHr
LT1460HC, LT1460JC, LT1460KC
100
ppm/√kHr
Hysteresis (Note 9)
ΔT = 0°C to 70°C
ΔT = –40°C to 85°C
25
160
ppm
ppm
LT1460A, LT1460B, LT1460C, LT1460D, LT1460E,
LT1460F, LT1460G, LT1460H, LT1460L, LT1460M
LT1460HC, LT1460JC, LT1460KC
ΔT = 0°C to 70°C
ΔT = –40°C to 85°C
●
●
50
250
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.
a 2-pole lowpass filter at 1kHz. The resulting output is full wave rectified
and then integrated for a fixed period, making the final reading an average
as opposed to RMS. A correction factor of 1.1 is used to convert from
average to RMS and a second correction of 0.88 is used to correct for the
nonideal pass band of the filters.
Note 2: If the part is stored outside of the specified temperature range, the
output may shift due to hysteresis.
Note 8: Long-term stability typically has a logarithmic characteristic and
therefore, changes after 1000 hours tend to be much smaller than before
that time. Total drift in the second thousand hours is normally less than
one third that of the first thousand hours with a continuing trend toward
reduced drift with time. Significant improvement in long-term drift can
be realized by preconditioning the IC with a 100 hour to 200 hour, 125°C
burn-in. Long-term stability will also be affected by differential stresses
between the IC and the board material created during board assembly. See
PC Board Layout in the Applications Information section.
Note 9: 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. For
instruments that are stored at reasonably well-controlled temperatures
(within 20 or 30 degrees of operating temperature) hysteresis is generally
not a problem.
Note 3: Temperature coefficient is measured by dividing the change in
output voltage by the specified temperature range. Incremental slope is
also measured at 25°C.
Note 4: Load regulation is measured on a pulse basis from no load to the
specified load current. Output changes due to die temperature change
must be taken into account separately.
Note 5: Thermal regulation is caused by die temperature gradients created
by load current or input voltage changes. This effect must be added to
normal line or load regulation. This parameter is not 100% tested.
Note 6: Excludes load regulation errors. For LT1460S3, ΔV
≤ 0.2%. For
OUT
all other packages, ΔV
≤ 0.1%.
OUT
Note 7: Peak-to-peak noise is measured with a single highpass filter at
0.1Hz and 2-pole lowpass filter at 10Hz. The unit is enclosed in a still-air
environment to eliminate thermocouple effects on the leads. The test time
is 10 sec. RMS noise is measured with a single highpass filter at 10Hz and
1460f
7
LT1460
U W
TYPICAL PERFOR A CE CHARACTERISTICS
LT1460-2.5 (N8, S8, MS8, Z Packages)
2.5V Minimum Input-Output
Voltage Differential
2.5V Load Regulation, Sourcing
2.5V Load Regulation, Sinking
6
5
4
3
2
1
0
80
70
60
50
40
30
20
10
0
100
10
125°C
125°C
25°C
–55°C
25°C
25°C
125°C
1
–55°C
–55°C
0.1
0
0.5
1.0
1.5
0.1
1
10
100
0
0.5
1.0
1.5
2.0
2.5
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
INPUT-OUTPUT VOLTAGE (V)
1460 G01
1460 G03
1460 G02
2.5V Output Voltage
Temperature Drift
2.5V Supply Current vs Input
Voltage
2.5V Line Regulation
2.503
2.502
2.501
2.500
2.499
2.498
175
150
125
100
75
2.5014
2.5010
2.5006
2.5002
2.4998
2.4994
2.4990
3 TYPICAL PARTS
125°C
25°C
125°C
25°C
–55°C
50
–55°C
25
0
–50
0
25
50
75
100
–25
5
10
20
0
15
0
2
4
6
8
10 12 14 16 18 20
TEMPERATURE (°C)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
1460 G04
1460 G05
1460 G06
2.5V Power Supply Rejection
Ratio vs Frequency
2.5V Output Impedance vs
Frequency
2.5V Transient Responses
90
80
70
60
50
40
30
20
10
0
1k
C = 0.1µF
L
10
1
C
= 0
L
100
0.1
0
10
1
I
= 10mA
OUT
1460 G09
C = 1µF
L
–10
100
1k
10k
100k
1M
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
FREQUENCY (Hz)
1460 G08
1460 G07
1460f
8
LT1460
U W
TYPICAL PERFOR A CE CHARACTERISTICS
2.5V Output Voltage Noise
Spectrum
2.5V Long-Term Drift
Three Typical Parts (S8 Package)
2.5V Output Noise 0.1Hz to 10Hz
1000
2.5000
2.4998
2.4996
2.4994
2.4992
2.4990
100
0
1
2
3
4
5
6
7
8
9
10
0
200
400
600
800
1000
10
100
1k
10k
100k
FREQUENCY (Hz)
TIME (SEC)
TIME (HOURS)
1460 G10
1460 G12
1460 G11
LT1460-5 (N8, S8, MS8, Z Packages)
5V Minimum Input-Output Voltage
Differential
5V Load Regulation, Sourcing
5V Load Regulation, Sinking
6
5
4
3
2
1
0
100
10
100
90
80
70
60
50
40
30
20
10
0
125°C
25°C
125°C
–55°C
25°C
25°C
–55°C
1
–55°C
125°C
0.1
0
1
2
3
4
5
0.1
1
10
100
0
0.5
1.0
1.5
2.0
2.5
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
INPUT-OUTPUT VOLTAGE (V)
1460 G13
1460 G15
1460 G14
5V Output Voltage
Temperature Drift
5V Supply Current vs Input
Voltage
5V Line Regulation
5.004
5.002
5.000
4.998
4.996
4.994
200
180
160
140
120
100
80
5.002
5.000
4.998
4.996
4.994
4.992
3 TYPICAL PARTS
125°C
25°C
25°C
125°C
–55°C
60
–55°C
40
20
0
–50
0
25
50
75
100
–25
2
4
6
8
10 12 14 16 18 20
0
0
2
4
6
8
10 12 14 16 18 20
TEMPERATURE (°C)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
1460 G16
1460 G17
1460 G18
1460f
9
LT1460
U W
TYPICAL PERFOR A CE CHARACTERISTICS
LT1460-5 (N8, S8, MS8, Z Packages)
5V Power Supply Rejection Ratio
vs Frequency
5V Output Impedance vs
Frequency
5V Transient Responses
90
80
70
60
50
40
30
20
10
0
1k
100
10
C
= 0
L
10
1
C = 0.1µF
L
0.1
0
1
C = 1µF
L
0.2ms/DIV
I
= 10mA
OUT
1460 G21
0.1
100
1k
10k
100k
1M
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
FREQUENCY (Hz)
1460 G20
1460 G19
5V Output Voltage Noise
Spectrum
5V Output Noise 0.1Hz to 10Hz
3000
2000
1000
100
0
1
2
3
4
5
6
7
8
9
10
10
100
1k
10k
100k
FREQUENCY (Hz)
TIME (SEC)
1460 G22
1460 G23
LT1460-10 (N8, S8, MS8, Z Packages)
10V Minimum Input/Output
Voltage Differential
10V Load Regulation, Sourcing
10V Load Regulation, Sinking
10
9
100
100
90
80
70
60
50
40
30
20
10
0
8
7
10
25°C
6
5
125°C
25°C
–55°C
125°C
4
3
2
1
0
–55°C
25°C
125°C
1
–55°C
0.1
0
0.5
1.0
1.5
2.0
2.5
0.1
1
10
100
0
1
3
4
2
5
INPUT/OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
1460 G25
1460 G24
1460 G26
1460f
10
LT1460
U W
TYPICAL PERFOR A CE CHARACTERISTICS
10V Output Voltage
Temperature Drift
10V Supply Current vs Input
Voltage
10V Line Regulation
10.006
10.002
9.998
9.994
9.990
9.986
9.982
10.004
10.000
9.996
9.992
9.988
9.984
9.980
400
360
320
280
240
200
160
120
80
3 TYPICAL PARTS
25°C
–55°C
25°C
–55°C
125°C
125°C
40
0
–50
0
25
50
75
100
6
8
14
16
18
20
–25
10
12
0
2
4
6
8
10 12 14 16 18 20
TEMPERATURE (°C)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
1460 G27
1460 G29
1460 G28
10V Power Supply Rejection
Ratio vs Frequency
10V Output Impedance vs
Frequency
10V Transient Responses
1000
100
10
100
90
80
70
60
50
40
30
20
10
0
C
= 0µF
10
1
L
C
= 0.1µF
L
0.1
0
C
L
= 1µF
1
200µs/DIV
I
= 10mA
OUT
1460 G32
0.1
0.1
1
10
100
1000
0.01
0.1
1
10
100
1000
INPUT FREQUENCY (kHz)
FREQUENCY (kHz)
1460 G31
1460 G30
10V Output Voltage Noise
Spectrum
10V Output Noise 0.1Hz to 10Hz
10
1
0.1
0.01
0.1
1
10
100
0
2
6
8
12
4
10
14
FREQUENCY (kHz)
TIME (SEC)
1460 G33
1460 G34
1460f
11
LT1460
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Characteristic curves are similar for all voltage
options of the LT1460S3. Curves from the LT1460S3-2.5 and the LT1460S3-10 represent the extremes of the voltage options.
Characteristic curves for other output voltages fall between these curves, and can be estimated based on their voltage output.
LT1460S3-2.5V Minimum Input-
Output Voltage Differential
LT1460S3-2.5V Load Regulation,
Sourcing
LT1460S3-2.5V Load Regulation,
Sinking
100
10
1
120
100
0
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
125°C
–55°C
80
60
25°C
125°C
–55°C
25°C
25°C
–55°C
40
20
0
125°C
0.1
0
0.5
1.0
1.5
2.0
2.5
0
1
2
3
4
5
0.1
1
10
100
INPUT-OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
1460 G35
1460 G36
1460 G37
LT1460S3-2.5V Output Voltage
Temperature Drift
LT1460S3-2.5V Supply Current
vs Input Voltage
LT1460S3-2.5V Line Regulation
2.502
2.501
2.500
2.499
2.498
2.497
2.496
2.495
2.494
2.503
2.502
2.501
2.500
250
200
150
100
50
THREE TYPICAL PARTS
25°C
25°C
125°C
–55°C
–55°C
125°C
2.499
2.498
2.497
0
50
TEMPERATURE (°C)
100 125
–50 –25
0
25
75
0
2
4
6
8
10 12 14 16 18 20
5
10
15
0
20
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
1460 G38
1460 G40
1460 G39
LT1460S3-2.5V Power Supply
Rejection Ratio vs Frequency
LT1460S3-2.5V Output Impedance
vs Frequency
LT1460S3-2.5V Transient
Response
1000
100
10
80
70
60
50
40
30
20
10
0
C
= 0µF
L
20
10
C
= 0.1µF
L
1
C
= 1µF
L
0.1
1
200µs/DIV
C
= 0µF
LOAD
1460 G43
0.1
0.1
1
10
100
1000
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
FREQUENCY (kHz)
1460 G41
1460 G42
1460f
12
LT1460
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Characteristic curves are similar for all voltage
options of the LT1460S3. Curves from the LT1460S3-2.5 and the LT1460S3-10 represent the extremes of the voltage options.
Characteristic curves for other output voltages fall between these curves, and can be estimated based on their voltage output.
LT1460S3-2.5V Output Voltage
Noise Spectrum
LT1460S3-2.5V Output Noise
0.1Hz to 10Hz
LT1460S3-10V Minimum Input-
Output Voltage Differential
100
10
1
1000
125°C
25°C
–55°C
100
0.1
0
0.5
1.0
1.5
2.0
2.5
TIME (2 SEC/DIV)
10
100
1k
10k
100k
INPUT-OUTPUT VOLTAGE (V)
FREQUENCY (Hz)
1460 G45
1460 G44
1460 G46
LT1460S3-10V Load Regulation,
Sourcing
LT1460S3-10V Load Regulation,
Sinking
LT1460S3-10V Output Voltage
Temperature Drift
10.006
10.004
10.002
10.000
9.998
9.996
9.994
9.992
9.990
9.988
9.986
9.984
9.982
35
30
25
20
15
10
5
250
200
150
100
50
THREE TYPICAL PARTS
125°C
25°C
–55°C
–55°C
0
–5
–10
125°C
25°C
0
0.1
1
10
100
50
TEMPERATURE (°C)
125
–50
0
25
75 100
–25
0
1
2
3
4
5
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
1460 G47
1460 G49
1460 G48
LT1460S3-10V Supply Current
vs Input Voltage
LT1460S3-10V Line Regulation
10.010
10.005
10.000
9.995
350
300
25°C
250
25°C
–55°C
125°C
125°C
–55°C
200
150
100
50
9.990
9.985
9.980
0
14
INPUT VOLTAGE (V)
18
20
0
6
10 12 14 16 18 20
6
8
10
12
16
2
4
8
INPUT VOLTAGE (V)
1460 G50
1460 G51
1460f
13
LT1460
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Characteristic curves are similar for all voltage
options of the LT1460S3. Curves from the LT1460S3-2.5 and the LT1460S3-10 represent the extremes of the voltage options.
Characteristic curves for other output voltages fall between these curves, and can be estimated based on their voltage output.
LT1460S3-10V Power Supply
Rejection Ratio vs Frequency
LT1460S3-10V Output Impedance
vs Frequency
LT1460S3-10V Transient
Response
100
90
80
70
60
50
40
30
20
10
0
1000
100
10
20
10
C
= 0µF
L
C
L
= 0.1µF
1
C
= 1µF
L
0.1
1
200µs/DIV
C
= 0µF
LOAD
1460 G54
0.1
0.1
1
10
100
1000
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
FREQUENCY (kHz)
1460 G52
1460 G53
LT1460S3-10V Output Voltage
Noise Spectrum
LT1460S3-10V Output Noise
0.1Hz to 10Hz
10
1
0.1
0.01
0.1
1
10
100
TIME (2 SEC/DIV)
FREQUENCY (kHz)
1460 G56
1460 G55
1460f
14
LT1460
U
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APPLICATIO S I FOR ATIO
Longer Battery Life
1µF, the ringing can be reduced with a small resistor in
series with the reference output as shown in Figure 4.
Figure 5 shows the response of the LT1460-2.5 with a
Series references have a large advantage over older shunt
style references. Shunt references require a resistor from
the power supply to operate. This resistor must be chosen
tosupplythemaximumcurrentthatcaneverbedemanded
by the circuit being regulated. When the circuit being
controlled is not operating at this maximum current, the
shunt reference must always sink this current, resulting
in high dissipation and short battery life.
2.5V
1.5V
V
GEN
R
= 10k
V
V
L
L
OUT
OUT
R
= 1k
The LT1460 series reference does not require a current set-
ting resistor and can operate with any supply voltage from
V
OUT
+0.9Vto20V. Whenthecircuitrybeingregulateddoes
1460 F02
1µs/DIV
notdemandcurrent, theLT1460reducesitsdissipationand
batterylifeisextended. Ifthereferenceisnotdeliveringload
current it dissipates only a few mW, yet the same configura-
tion can deliver 20mA of load current when demanded.
Figure 2. CL = 0
2.5V
1.5V
V
GEN
Capacitive Loads
R
R
= 10k
The LT1460 is designed to be stable with capacitive loads.
With no capacitive load, the reference is ideal for fast set-
tling, applications where PC board space is a premium,
or where available capacitance is limited.
V
V
L
L
OUT
OUT
= 1k
1460 F03
The test circuit for the LT1460-2.5 shown in Figure 1 is
used to measure the response time for various load cur-
rents and load capacitors. The 1V step from 2.5V to 1.5V
20µs/DIV
Figure 3. CL = 0.01µF
produces a current step of 1mA or 100µA for R = 1k or
L
V
R
R
L
R = 10k. Figure 2 shows the response of the reference
OUT
S
L
V
= 5V
C
LT1460-2.5
IN
V
GEN
with no load capacitance.
2.5V
1.5V
IN
C
L
0.1µF
The reference settles to 2.5mV (0.1%) in less than 1µs
for a 100µA pulse and to 0.1% in 1.5µs with a 1mA step.
When load capacitance is greater than 0.01µF, the refer-
ence begins to ring due to the pole formed with the output
impedance. Figure 3 shows the response of the reference
to a 1mA and 100µA load current step with a 0.01µF load
capacitor. The ringing can be greatly reduced with a DC
load as small as 200µA. With large output capacitors, ≥
1460 F04
Figure 4. Isolation Resistor Test Circuit
V
2.5V
1.5V
GEN
R
R
= 1k
L
S
V
V
OUT
OUT
= 0
R
R
= 1k
= 2Ω
R
L
S
L
V
OUT
V
= 5V
LT1460-2.5
IN
V
GEN
2.5V
1.5V
C
IN
0.1µF
C
L
1460 F05
1460 F01
0.1ms/DIV
Figure 1. Response Time Test Circuit
Figure 5. Effect of RS for CL = 1µF
1460f
15
LT1460
U
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APPLICATIO S I FOR ATIO
R = 2Ω and C = 1µF. R should not be made arbitrarily
and 100µA load current step with a 0.01µF load capacitor.
Figure 9 to Figure 11 illustrate response of the LT1460-10.
The 1V step from 10V to 9V produces a current step of
S
L
S
large because it will limit the load regulation.
Figure 6 to Figure 8 illustrate response in the LT1460-5.
The 1V step from 5V to 4V produces a current step of
1mA or 100µA for R = 1k or R = 10k. Figure 10 shows
L
L
the response of the reference with no load capacitance.
1mA or 100µA for R = 1k or R = 10k. Figure 7 shows
L
L
the response of the reference with no load capacitance.
The reference settles to 10mV (0.1%) in 0.4µs for a 100µA
pulse and to 0.1% in 0.8µs with a 1mA step. When load
capacitance is greater than 0.01µF, the reference begins
to ring due to the pole formed with the output impedance.
Figure11showstheresponseofthereferencetoa1mAand
100µA load current step with a 0.01µF load capacitor.
The reference settles to 5mV (0.1%) in less than 2µs for
a 100µA pulse and to 0.1% in 3µs with a 1mA step. When
loadcapacitanceisgreaterthan0.01µF,thereferencebegins
to ring due to the pole formed with the output impedance.
Figure 8 shows the response of the reference to a 1mA
R
L
R
V
L
V
OUT
OUT
V
= 12.5V
C
LT1460-10
V
= 5V
C
LT1460-5
IN
V
IN
V
GEN
GEN
10V
9V
5V
4V
IN
IN
C
C
L
L
0.1µF
0.1µF
1460 F09
1460 F06
Figure 6. Response Time Test Circuit
Figure 9. Response Time Test Circuit
5V
V
V
10V
9V
GEN
GEN
4V
V
V
V
V
R
R
= 10k
R
L
= 10k
OUT
OUT
OUT
OUT
L
L
= 1k
R
L
= 1k
1460 F07
1460 F10
2µs/DIV
2µs/DIV
Figure 7. CL = 0
Figure 10. CL = 0
10V
9V
V
5V
4V
GEN
V
V
GEN
OUT
V
V
R
R
= 10k
= 1k
R
R
= 10k
OUT
OUT
L
L
L
L
= 1k
V
OUT
1460 F08
1460 F11
10µs/DIV
10µs/DIV
Figure 8. CL = 0.01µF
Figure 11. CL = 0.01µF
1460f
16
LT1460
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APPLICATIO S I FOR ATIO
Table 1 gives the maximum output capacitance for vari-
ous load currents and output voltages to avoid instability.
Load capacitors with low ESR (effective series resistance)
cause more ringing than capacitors with higher ESR such
as polarized aluminum or tantalum capacitors.
Hysteresis
HysteresisdatashowninFigure13andFigure14represents
the worst-case data taken on parts from 0°C to 70°C and
from –40°C to 85°C. The device is capable of dissipating
relatively high power, i.e., for the LT1460S3-2.5, PD =
17.5V • 20mA = 350mW. The thermal resistance of the
SOT-23 package is 325°C/W and this dissipation causes
a 114°C internal rise producing a junction temperature of
Table 1. Maximum Output Capacitance
VOLTAGE
OPTION
2.5V
3V
I
= 100µA
I
= 1mA
I
= 10mA
2µF
I
= 20mA
OUT
OUT
OUT
OUT
>10µF
>10µF
>10µF
>10µF
>10µF
>10µF
0.68µF
T = 25°C + 114°C = 139°C. This elevated temperature will
J
>10µF
>10µF
>10µF
1µF
2µF
0.68µF
0.68µF
0.68µF
0.1µF
cause the output to shift due to thermal hysteresis. For
highest performance in precision applications, do not
let the LT1460S3’s junction temperature exceed 85°C.
3.3V
5V
1µF
1µF
10V
0.15µF
18
WORST-CASE HYSTERESIS
ON 40 UNITS
16
14
12
10
8
Long-Term Drift
Long-termdriftcannotbeextrapolatedfromaccelerated
hightemperaturetesting.Thiserroneoustechniquegives
drift numbers that are wildly optimistic. The only way
long-term drift can be determined is to measure it over
the time interval of interest. The LT1460S3 long-term
drift data was taken on over 100 parts that were soldered
into PC boards similar to a “real world” application. The
boards were then placed into a constant temperature oven
70°C TO 25°C
0°C TO 25°C
6
4
2
0
160 200 240
–240 –200 –160 –120 –80 –40
0
40 80 120
HYSTERESIS (ppm)
with T = 30°C, their outputs were scanned regularly and
A
1460 F13
measured with an 8.5 digit DVM. Figure 12 shows typical
long-term drift of the LT1460S3s.
Figure 13. 0°C to 70°C Hysteresis
150
100
9
8
7
6
5
4
3
2
1
0
WORST-CASE HYSTERESIS
ON 34 UNITS
85°C TO 25°C
–40°C TO 25°C
50
0
–50
–100
–150
0
100 200 300 400 500 600 700 800 900 1000
HOURS
400 500 600
100 200 300
–600 –500 –400 –300 –200 –100
0
HYSTERESIS (ppm)
1460 F12
1460 F14
Figure 14. –40°C to 85°C Hysteresis
Figure 12. Typical Long-Term Drift
1460f
17
LT1460
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APPLICATIO S I FOR ATIO
Input Capacitance
Total worst-case output error is:
It is recommended that a 0.1µF or larger capacitor be
added to the input pin of the LT1460. This can help with
stability when large load currents are demanded.
0.075% + 0.035% + 0.070% = 0.180%.
Table 1 gives worst-case accuracy for the LT1460AC, CC,
DC, FC, GC from 0°C to 70°C and the LT1460BI, EI, GI
from –40°C to 85°C.
Output Accuracy
Note that the LT1460-5 and LT1460-10 give identical ac-
curacy as a fraction of their respective output voltages.
Likeallreferences,eitherseriesorshunt,theerrorbudgetof
theLT1460-2.5ismadeupofprimarilythreecomponents:
initialaccuracy,temperaturecoefficientandloadregulation.
Line regulation is neglected because it typically contrib-
utes only 30ppm/V, or 75µV for a 1V input change. The
LT1460-2.5typicallyshiftslessthan0.01%whensoldered
into a PCB, so this is also neglected (see PC Board Layout
section). The output errors are calculated as follows for a
100µA load and 0°C to 70°C temperature range:
PC Board Layout
In 13- to 16-bit systems where initial accuracy and tem-
perature coefficient calibrations have been done, the me-
chanical and thermal stress on a PC board (in a cardcage
for instance) can shift the output voltage and mask the
true temperature coefficient of a reference. In addition,
the mechanical stress of being soldered into a PC board
can cause the output voltage to shift from its ideal value.
Surface mount voltage references (MS8 and S8) are the
most susceptible to PC board stress because of the small
amount of plastic used to hold the lead frame.
LT1460AC
Initial accuracy = 0.075%
For I = 100µA, and using the LT1460-2.5 for calculation,
O
A simple way to improve the stress-related shifts is to
mount the reference near the short edge of the PC board,
or in a corner. The board edge acts as a stress boundary,
or a region where the flexure of the board is minimum.
The package should always be mounted so that the leads
absorb the stress and not the package. The package is
generally aligned with the leads parallel to the long side
of the PC board as shown in Figure 16a.
⎛
⎞
3500ppm
mA
∆VOUT
=
0.1mA 2.5V = 875µV
(
)(
)
⎜
⎟
⎝
⎠
which is 0.035%.
For temperature 0°C to 70°C the maximum ΔT = 70°C,
⎛
⎞
10ppm
∆V
=
70°C 2.5V = 1.75mV
(
)(
)
OUT
⎜
⎟
°C
⎝
⎠
A qualitative technique to evaluate the effect of stress on
voltage references is to solder the part into a PC board and
which is 0.07%.
Table 1. Worst-Case Output Accuracy Over Temperature
I
LT1460AC LT1460BI LT1460CC LT1460DC LT1460EI LT1460FC LT1460GC LT1460GI LT1460HC LT1460JC LT1460KC
OUT
0
0.145%
0.180%
0.325%
0.425%
0.225%
0.260%
0.405%
N/A
0.205%
0.240%
0.385%
0.485%
0.240%
0.275%
0.420%
0.520%
0.375%
0.410%
0.555%
N/A
0.325%
0.360%
0.505%
0.605%
0.425%
0.460%
0.605%
0.705%
0.562%
0.597%
0.742%
N/A
0.340%
0.380%
0.640%
0.540%
0.540%
0.580%
0.840%
0.740%
0.850%
0.890%
1.15%
1.05%
100µA
10mA
20mA
1460f
18
LT1460
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APPLICATIO S I FOR ATIO
deform the board a fixed amount as shown in Figure 15.
The flexure #1 represents no displacement, flexure #2 is
concavemovement,flexure#3isrelaxationtonodisplace-
ment and finally, flexure #4 is a convex movement. This
motion is repeated for a number of cycles and the relative
output deviation is noted. The result shown in Figure 16a
is for two LT1460S8-2.5s mounted vertically and Figure
16b is for two LT1460S8-2.5s mounted horizontally. The
parts oriented in Figure 16a impart less stress into the
package because stress is absorbed in the leads. Figures
16a and 16b show the deviation to be between 125µV and
250µV and implies a 50ppm and 100ppm change respec-
tively. This corresponds to a 13- to 14-bit system and is
not a problem for most 10- to 12-bit systems unless the
system has a calibration. In this case, as with temperature
hysteresis, this low level can be important and even more
careful techniques are required.
The most effective technique to improve PC board stress
is to cut slots in the board around the reference to serve
as a strain relief. These slots can be cut on three sides of
thereferenceandtheleadscanexitonthefourthside. This
“tongue” of PC board material can be oriented in the long
direction of the board to further reduce stress transferred
to the reference.
1
2
3
The results of slotting the PC boards of Figures 16a and
16b are shown in Figures 17a and 17b. In this example
the slots can improve the output shift from about 100ppm
to nearly zero.
4
1460 F15
Figure 15. Flexure Numbers
2
2
1
1
LONG DIMENSION
LONG DIMENSION
0
0
–1
–1
0
0
40
40
10
20
FLEXURE NUMBER
30
10
20
FLEXURE NUMBER
30
1460 F16b
1460 F16a
Figure 16a. Two Typical LT1460S8-2.5s, Vertical
Orientation Without Slots
Figure 16b. Two Typical LT1460S8-2.5s, Horizontal
Orientation Without Slots
2
1
2
1
0
0
SLOT
SLOT
–1
–1
0
0
40
40
10
20
30
10
20
30
FLEXURE NUMBER
FLEXURE NUMBER
1460 F17a
1460 F17b
Figure 17a. Same Two LT1460S8-2.5s in Figure 16a,
but with Slots
Figure 17b. Same Two LT1460S8-2.5s in Figure 16b,
but with Slots
1460f
19
LT1460
SIMPLIFIED SCHEMATIC
V
CC
V
OUT
GND
1460 SS
1460f
20
LT1460
U
PACKAGE DESCRIPTIO
S3 Package
3-Lead Plastic SOT-23
(Reference LTC DWG # 05-08-1631)
0.764
2.80 – 3.04
(.110 – .120)
0.8 0.127
2.10 – 2.64
1.20 – 1.40
2.74
(.083 – .104) (.047 – .060)
0.96 BSC
1.92
0.45 – 0.60
(.017 – .024)
RECOMMENDED SOLDER PAD LAYOUT
0.89 – 1.03
(.035 – .041)
0.37 – 0.51
(.015 – .020)
0.89 – 1.12
(.035 – .044)
0.01 – 0.10
(.0004 – .004)
0.55
(.022)
REF
1.78 – 2.05
(.070 – .081)
0.09 – 0.18
(.004 – .007)
S3 SOT-23 0502
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
MILLIMETERS
2. DIMENSIONS ARE IN
(INCHES)
3. DRAWING NOT TO SCALE
4. DIMENSIONS ARE INCLUSIVE OF PLATING
5. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
6. MOLD FLASH SHALL NOT EXCEED .254mm
7. PACKAGE JEDEC REFERENCE IS TO-236 VARIATION AB
1460f
21
LT1460
U
PACKAGE DESCRIPTIO
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.400*
(10.160)
MAX
8
7
6
5
4
.255 .015*
(6.477 0.381)
1
2
3
.130 .005
.300 – .325
.045 – .065
(3.302 0.127)
(1.143 – 1.651)
(7.620 – 8.255)
.065
(1.651)
TYP
.008 – .015
(0.203 – 0.381)
.120
.020
(0.508)
MIN
(3.048)
MIN
+.035
.325
–.015
.018 .003
(0.457 0.076)
.100
(2.54)
BSC
+0.889
8.255
(
)
N8 1002
–0.381
NOTE:
INCHES
1. DIMENSIONS ARE
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 – .197
(4.801 – 5.004)
.045 .005
NOTE 3
.050 BSC
7
5
8
6
.245
MIN
.160 .005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
.030 .005
TYP
1
3
4
2
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
(0.254 – 0.508)
× 45°
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
.008 – .010
(0.203 – 0.254)
0°– 8° TYP
.016 – .050
(0.406 – 1.270)
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
NOTE:
INCHES
1. DIMENSIONS IN
(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)
SO8 0303
1460f
22
LT1460
U
PACKAGE DESCRIPTIO
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660)
0.889 0.127
(.035 .005)
5.23
(.206)
MIN
3.20 – 3.45
(.126 – .136)
3.00 0.102
(.118 .004)
(NOTE 3)
0.52
(.0205)
REF
0.65
(.0256)
BSC
0.42 0.038
(.0165 .0015)
TYP
8
7 6
5
RECOMMENDED SOLDER PAD LAYOUT
3.00 0.102
(.118 .004)
(NOTE 4)
4.90 0.152
(.193 .006)
DETAIL “A”
0.254
(.010)
0° – 6° TYP
GAUGE PLANE
1
2
3
4
0.53 0.152
(.021 .006)
1.10
(.043)
MAX
0.86
(.034)
REF
DETAIL “A”
0.18
(.007)
SEATING
PLANE
0.22 – 0.38
(.009 – .015)
TYP
0.127 0.076
(.005 .003)
0.65
(.0256)
BSC
MSOP (MS8) 0204
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 Plastic TO-92 (Similar to TO-226)
(Reference LTC DWG # 05-08-1410)
.180 .005
(4.572 0.127)
.060 .005
(1.524 0.127)
DIA
.90
(2.286)
NOM
.180 .005
(4.572 0.127)
5°
NOM
.500
(12.70)
MIN
.050
(1.270)
MAX
UNCONTROLLED
LEAD DIMENSION
.016 .003
.015 .002
(0.406 0.076)
(0.381 0.051)
.050
(1.27)
BSC
.098 +.016/–.04
(2.5 +0.4/–0.1)
2 PLCS
Z3 (TO-92) 0801
.060 .010
TO-92 TAPE AND REEL
(1.524 0.254)
REFER TO TAPE AND REEL SECTION OF
LTC DATA BOOK FOR ADDITIONAL INFORMATION
.140 .010
(3.556 0.127)
3
2
1
10° NOM
1460f
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 representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
23
LT1460
TYPICAL APPLICATIONS
Handling Higher Load Currents
+
V
40mA
+
47µF
IN
R1*
LT1460
10mA
V
OUT
OUT
GND
TYPICAL LOAD
CURRENT = 50mA
R
L
*SELECT R1 TO DELIVER 80% OF TYPICAL LOAD CURRENT.
LT1460 WILL THEN SOURCE AS NECESSARY TO MAINTAIN
PROPER OUTPUT. DO NOT REMOVE LOAD AS OUTPUT WILL
BE DRIVEN UNREGULATED HIGH. LINE REGULATION IS
DEGRADED IN THIS APPLICATION
+
V
– V
OUT
R1 =
40mA
1460 TA03
Boosted Output Current with No Current Limit
Boosted Output Current with Current Limit
+
+
V
≥ (V
+ 1.8V)
V
≥ V
+ 2.8V
OUT
OUT
+
+
D1*
LED
R1
220Ω
R1
220Ω
47µF
47µF
8.2Ω
2N2905
2N2905
IN
IN
LT1460
LT1460
V
OUT
V
OUT
OUT
100mA
OUT
100mA
+
2µF
SOLID
TANT
GND
+
2µF
GND
SOLID
TANT
GLOWS IN CURRENT LIMIT,
DO NOT OMIT
*
1460 TA05
1460 TA04
RELATED PARTS
PART NUMBER DESCRIPTION
COMMENTS
LT1019
LT1027
LT1236
LT1461
LT1634
LT1790
LTC®1798
LT6660
Precision Bandgap Reference
Precision 5V Reference
0.05% Max, 5ppm/°C Max
0.02%, 2ppm/°C Max
Precision Low Noise Reference
0.05% Max, 5ppm/°C Max, SO Package
Micropower Precision Low Dropout
0.04% Max, 3ppm/°C Max, 50mA Output Current
0.05%, 25ppm/°C Max
Micropower Precision Shunt Reference 1.25V, 2.5V Output
Micropower Precision Series References
0.05% Max, 10ppm/°C Max, 60µA Supply, SOT23 Package
0.15% Max, 40ppm/°C, 6.5µA Max Supply Current
Micropower Low Dropout Reference, Fixed or Adjustable
Tiny Micropower Precision Series References
0.075% Max, 10ppm/°C Max, 20mA Output, 2mm × 2mm DFN Package
1460f
LT 0106 • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
24
●
●
© LINEAR TECHNOLOGY CORPORATION 2006
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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