LT6657AHMS8-5 Datasheet, PDF (1/22 Pages) Linear Integrated Systems – 1.5ppm C Drift, Low Noise, Buffered Reference

Features
nn _{Low Drift}
nn _{A Grade: 1.5ppm/°C Max}
nn _{B Grade: 3ppm/°C Max}
nn _{Low Noise:}
nn _{0.5ppmP-P (0.1Hz to 10Hz)}
nn _{0.8ppmRMS (10Hz to 1kHz)}
nn _{Wide Supply Range to 40V}
nn _{Sources and Sinks 10mA Min}
nn _{Line Regulation: 0.2ppm/V}
nn _{Load Regulation: 0.7ppm/mA}
nn _{Reverse Supply Protection}
nn _{Reverse Output Protection}
nn _{Low Power Shutdown: <4µA Max}
nn _{Thermal Protection}
nn _{Can Operate in Shunt Mode}
nn _{Configurable as a Negative Reference}
nn _{Available Output Voltage Options: 2.5V, 3V, 5V}
nn _{MSOP-8 Package}
Applications
nn _{High Temperature Industrial}
nn _{High Resolution Data Acquisition Systems}
nn _{Instrumentation and Process Control}
nn _{Automotive Control and Monitoring}
nn _{Medical Equipment}
nn _{Shunt and Negative Voltage References}
LT6657
1.5ppm/°C Drift, Low Noise,
Buffered Reference
Description
The LT^®6657 is a precision voltage reference that combines
robust operating characteristics with extremely low drift
and low noise. With advanced curvature compensation,
this bandgap reference achieves 1.5ppm/°C drift with
predictable temperature behavior, and an initial voltage
accuracy of 0.1%. It also offers 0.5ppm_P-P noise and very
low temperature cycling hysteresis.
The LT6657 is a low dropout reference that can be powered
from as little as 50mV above the output voltage, up to 40V.
The buffered output supports ±10mA of output drive with
low output impedance and precise load regulation. The
high sink current capability allows operation as a negative
voltage reference with the same precision as a positive
reference. This part is safe under reverse battery condi-
tions, and includes current protection when the output is
short-circuited and thermal shutdown for overload condi-
tions. A shutdown is included to allow power reduction
while enabling a quick turn-on.
The LT6657 is fully specified over the temperature range of
–40°C to 125°C. It is available in the 8-lead MSOP package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical Application
Basic Connection
(V_OUT + 50mV) < V_IN < 40V
2 _IN
3
C_IN
SHDN
0.1µF
LT6657
GND
4
OUT ⁶
V_OUT
C_OUT
1µF
6657 TA01a
Output Voltage Temperature Drift
200
THREE TYPICAL PARTS
100
1ppm/°C BOX
0
–100
–200
–45 –20
5 30 55 80
TEMPERATURE (°C)
105 130
6657 TA01b
For more information www.linear.com/LT6657
6657fb
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