LT6656
1µA Precision Series
Voltage Reference
FeaTures
DescripTion
The LT®6656 is a small precision voltage reference that
draws less than 1µA of supply current and can operate
with a supply voltage within 10mV of the output voltage.
The LT6656 offers an initial accuracy of 0.05% and tem-
perature drift of 10ppm/°C. The combined low power and
precision characteristics are ideal for portable and battery
powered instrumentation.
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Low Drift
A Grade: 10 ppm/°C Max
B Grade: 20 ppm/°C Max
High Accuracy
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A Grade: 0.05% Max
B Grade: 0.1% Max
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Ultralow Supply Current: 850nA
High Output Drive Current: 5mA Min
Low Dropout Voltage: 10mV Max
Fully Specified from –40°C to 85°C
Operational from –55°C to 125°C
Wide Supply Range to 18V
Reverse Input/Output Protection
Available Output Voltage Options: 2.5V
For 1.25V, 2.048V, 3V, 3.3V, 4.096V and 5V Options,
Consult LTC Marketing
The LT6656 can supply up to 5mA of output drive with
65ppm/mA of load regulation, allowing it to be used as
the supply voltage and the reference input to a low power
ADC. The LT6656 can accept a supply voltage up to 18V
and withstand the reversal of the input connections.
The LT6656 output is stable with 1µF or larger output ca-
pacitanceandoperateswithawiderangeofoutputcapacitor
ESR, ensuring that the LT6656 is simple to use.
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Thermal Hysteresis: 25ppm
Low Profile (1mm) ThinSOT™ Package
This reference is fully specified for operation from –40°C
to 85°C, and is functional over the extreme temperature
range of –55°C to 125°C. Low hysteresis and a consistent
temperature drift are obtained through advanced design,
processing and packaging techniques.
applicaTions
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Precision A/D and D/A Converters
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The LT6656 is offered in the 6-lead SOT-23 package.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. ThinSOT is
a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
Portable Gas Monitors
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Battery- or Solar-Powered Systems
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Precision Regulators
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Low Voltage Signal Processing
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Micropower Remote Sensing
Typical applicaTion
Output Voltage Temperature Drift
2.503
38 TYPICAL UNITS
Basic Connection
2.502
2.501
2.500
2.499
2.498
V
OUT
LT6656-2.5
2.510V b V b 18V
IN
2.5V
0.1MF
1MF
6656 TA01a
–40 –20
0
20
40
60
80
TEMPERATURE (°C)
6652 TA01b
6656f
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