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PDF LTC1258CS8-5 Data sheet ( Hoja de datos )
| Número de pieza | LTC1258CS8-5 | |
| Descripción | Micropower Low Dropout References | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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FEATURES
s 200mV Max Dropout at 10mA Output Current
s 4µA Typical Quiescent Current
s 0.15% Max Initial Accuracy (S8)
s No Output Capacitor Required
s Output Sources 10mA, Sinks 2mA
s 40ppm/°C Max Drift (S8)
s Available in Small MSOP Package
s Voltage Options: 2.5V, 3V, 4.1V, 5V and Adjustable
U
APPLICATIO S
s Battery-Powered Systems
s Handheld Instruments
s Precision Power Supplies
s A/D and D/A Converters
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTC1258 Series
Micropower Low
Dropout References
DESCRIPTIO
The LTC®1258/LTC1258-2.5/LTC1258-3/LTC1258-4.1/
LTC1258-5 are micropower bandgap references that
combine high accuracy and low drift with very low supply
current and small package size. The combination of ultralow
quiescent current and low dropout voltage of only 200mV
max. makes them ideal for battery-powered equipment.
The output voltage is set by an external resistor divider for
the adjustable LTC1258.
This series of references uses curvature compensation to
obtain low temperature coefficient and trimmed thin-film
resistors to achieve high output accuracy. These refer-
ences can source up to 10mA and sink up to 2mA, making
them ideal for precision regulator applications. They are
stable without an output bypass capacitor, but are also
stable with capacitance up to 1µF. This feature is important
in critical applications where PC board space is a premium
and fast settling is demanded.
The LTC1258 series references provide power dissipation
advantages over shunt references. In addition to supply
current, shunt references must also idle the entire load
current to operate.
The LTC1258 series is available in the 8-pin MSOP and SO
packages.
TYPICAL APPLICATION
2.5V Battery-Powered Reference
2.7V
TO 12.6V
LTC1258-2.5
2
IN
0.1µF
1
OUT
GND
4
2.5V
1258 TA01
LTC1258-2.5 Temperature Drift
4
3
2
1
0
–1
–2
–3
–4
–40 –20
0 20 40 60
TEMPERATURE (°C)
80 100
1258 TA02
1
1 page  
LTC1258 Series
TYPICAL PERFORMANCE CHARACTERISTICS
LTC1258-2.5 PSRR vs Frequency
60
VIN = 2.7V
50
LTC1258-2.5 0.1Hz to 10Hz Noise
VIN = 2.7V
40
30 5µV/DIV
20
10
0
10 100 1k 10k
FREQUENCY (Hz)
1258 G09
1SEC/DIV
1258 G10
PIN FUNCTIONS
OUT (Pin 1): Reference Output. The output can source up
to 10mA and sink up to 2mA. It is stable with output bypass
capacitor ranging from 0µF to 1µF.
IN (Pin 2): Positive Supply. Bypassing with a 0.1µF
capacitor is recommended if the output loading changes.
(VOUT + 0.2V) ≤ VIN ≤ 12.6V.
DNC (Pin 3): (LTC1258-2.5/LTC1258-3/LTC1258-4.1/
LTC1258-5) Do Not Connect. Connected internally for
post package trim. This pin must be left unconnected.
FB (Pin 3): (LT1258) Resistor Divider Feedback Pin.
Connect a resistor divider from OUT to GND and the center
tap to FB. This pin sets the output potential.
VOUT = 2.385V R1R+2R2; R1 is connected from OUT
to FB and R2 from FB to GND.
GND (Pin 4): Negative Supply or Ground Connection.
DNC (Pins 5, 6, 7, 8): Do Not Connect. Connected
internally for post package trim. These pins must be left
unconnected.
BLOCK DIAGRAM
2
IN
2.385V
+
–
OUT 1
R1
FB 3 (LTC1258)
R2
GND
4
1258 BD
NOTE: R1 AND R2 ARE NOT CONNECTED FOR LTC1258
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LTC1258CS8-5.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LTC1258CS8-2.5 | Micropower Low Dropout References | Linear Technology |
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