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PDF LT1461BCS8-2.5 Data sheet ( Hoja de datos )
| Número de pieza | LT1461BCS8-2.5 | |
| Descripción | Micropower Precision Low Dropout Series Voltage Reference | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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FEATURES
s Trimmed to High Accuracy: 0.04% Max
s Low Drift: 3ppm/°C Max
s Low Supply Current: 50µA Max
s Temperature Coefficient Guaranteed to 125°C
s High Output Current: 50mA Min
s Low Dropout Voltage: 300mV Max
s Excellent Thermal Regulation
s Power Shutdown
s Thermal Limiting
s Operating Temperature Range: – 40°C to 125°C
s Available in SO-8 Package
U
APPLICATIO S
s A/D and D/A Converters
s Precision Regulators
s Handheld Instruments
s Power Supplies
TYPICAL APPLICATIO
Basic Connection
VIN ≥ 2.8V
CIN
1µF
LT1461-2.5
2.5V
CL
2µF
1461 TA01
LT1461-2.5
Micropower Precision
Low Dropout Series
Voltage Reference
DESCRIPTIO
The LT®1461 is a low dropout micropower bandgap refer-
ence that combines very high accuracy and low drift with low
supply current and high output drive. This series reference
uses advanced curvature compensation techniques to obtain
low temperature coefficient and trimmed precision thin-film
resistors to achieve high output accuracy. The LT1461 draws
only 35µA of supply current, making it ideal for low power and
portable applications, however its high 50mA output drive
makes it suitable for higher power requirements, such as
precision regulators.
In low power applications, a dropout voltage of less than
300mV ensures maximum battery life while maintaining full
reference performance. Line regulation is nearly immeasur-
able, while the exceedingly good load and thermal regulation
will not add significantly to system error budgets. The
shutdown feature can be used to switch full load currents and
can be used for system power down. Thermal shutdown
protects the part from overload conditions.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Load Regulation, PDISS = 200mW
0mA
IOUT
20mA
VOUT LOAD REG
1mV/DIV
10ms/DIV
1461 TA02
1
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
Output Impedance vs Frequency
1000
COUT = 2µF
COUT = 1µF
100
Turn-On Time
20 VIN
10
0
10
1
0.01
0.1 1
FREQUENCY (kHz)
10
1461 G10
Transient Response to 10mA
Load Step
IOUT
0mA
10mA/DIV
2
VOUT
1
0
CIN = 1µF
CL
RL
=
=
2µF
∞
TIME (100µs/DIV)
1461 G11
Line Transient Response
5V
VIN
4V
LT1461-2.5
Turn-On Time
VIN
20
10
0
2
VOUT
1
0
CIN = 1µF
CL = 2µF
RL = 50Ω
TIME (100µs/DIV)
1461 G12
Output Noise 0.1Hz ≤ f ≤ 10Hz
VOUT
50mV/DIV
CL = 2µF
VOUT
50mV/DIV
1461 G13
CIN = 0.1µF
1461 G14
Long-Term Drift (Number of Data Points Reduced at 650 Hours)*
250
LT1461S8-2.5
3 TYPICAL PARTS SOLDERED ONTO PCB
200 TA = 30°C
150
100
50
0
–50
0
200 400 600 800 1000 1200 1400 1600 1800 2000
HOURS
1461 G15
*SEE APPLICATIONS INFORMATION FOR DETAILED EXPLANATION OF LONG-TERM DRIFT
TIME (2SEC/DIV)
1461 G18
5
5 Page 
SI PLIFIED SCHE ATIC
SHDN 3
LT1461-2.5
2 VIN
6 VOUT
4 GND
1461 SS
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 – 0.197*
(4.801 – 5.004)
8 765
0.228 – 0.244
(5.791 – 6.197)
0.150 – 0.157**
(3.810 – 3.988)
12
0.010
(0.254
–
–
0.020
0.508)
×
45°
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)
0.014 – 0.019
(0.355 – 0.483)
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
34
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
BSC
SO8 1298
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 represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LT1461BCS8-2.5.PDF ] | |
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