LT6656
1
6656fc
For more information www.linear.com/LT6656
TYPICAL APPLICATION
Output Voltage Temperature Drift
TEMPERATURE (°C)
–40
2.498
2.499
V
OUT
(V)
2.500
2.501
2.502
2.503
–20 0 20 40
6652 TA01b
60 80
38 TYPICAL UNITS
LT6656-2.5
Basic Connection
DESCRIPTION
1µA Precision Series
Voltage Reference
The LT
®
6656 is a tiny 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.
The L
T6656 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
capacitance and operates with a wide range of output
capacitor ESR.
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.
The LT6656 is offered in the 6-lead SOT-23, (2mm ×
2mm) DFN, and 8-lead LS8 Packages. The LS8 is a 5mm
× 5mm surface mount hermetic package that provides
outstanding stability.
FEATURES
APPLICATIONS
n
Ultralow Supply Current: 850nA
n
Low Drift
A Grade: 10 ppm/°C Max
B Grade: 20 ppm/°C Max
n
High Accuracy
A Grade: 0.05% Max
B Grade: 0.1% Max
n
Long-Term Drift: 15ppm/√kHr (LS8 Package)
n
No Humidity Sensitivity (LS8 Package)
n
High Output Drive Current: 5mA Min
n
Low Dropout Voltage: 10mV Max
n
Fully Specified from –40°C to 85°C
n
Operational from –55°C to 125°C
n
Wide Supply Range to 18V
n
Reverse Input/Output Protection
n
Available Output Voltage Options:
1.25V, 2.048V, 2.5V, 3V, 3.3V, 4.096V and 5V
n
Available in Low Profile (1mm) ThinSOT™,
(2mm × 2mm) DFN and High Stability Hermetic
(5mm ×
5mm) LS8 Packages
n
Precision A/D and D/A Converters
n
Portable Gas Monitors
n
Battery- or Solar-Powered Systems
n
Precision Regulators
n
Low Voltage Signal Processing
n
Micropower Remote Sensing
2.51V ≤ V
IN
≤ 18V
0.1µF 1µF
V
OUT
2.5V
6656 TA01a
LT6656-2.5
V
IN
V
OUT
GND
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
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