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Linear Technology Electronic Components Datasheet

LT6657 Datasheet

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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 0.5ppmP-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
(VOUT + 50mV) < VIN < 40V
2 IN
CIN 3 SHDN
0.1µF
LT6657
GND
4
OUT 6
VOUT
COUT
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
1


Linear Technology Electronic Components Datasheet

LT6657 Datasheet

Buffered Reference

No Preview Available !

LT6657
Absolute Maximum Ratings
(Note 1)
Input Voltage VIN (to GND)........................... –40V to 40V
Shutdown Voltage SHDN............................. –20V to 40V
Output Voltage VOUT...................................... –3V to 30V
Input-to-Output Differential Voltage (Note 2)...........±40V
Output Short-Circuit Duration........................... Indefinite
Operating Junction Temperature
Range................................................. –40°C to 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering 10 sec)
(Note 3)............................................................. 300°C
Pin Configuration
TOP VIEW
DNC 1
VIN 2
SHDN 3
GND 4
8 DNC
7 DNC
6 VOUT
5 DNC
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 273°C/W
DNC: CONNECTED INTERNALLY
DO NOT CONNECT EXTERNAL CIRCUITRY TO THESE PINS
Order Information
http://www.linear.com/product/LT6657#orderinfo
TUBE
LT6657AHMS8-2.5#PBF
LT6657BHMS8-2.5#PBF
LT6657AHMS8-3#PBF
LT6657BHMS8-3#PBF
LT6657AHMS8-5#PBF
LT6657BHMS8-5#PBF
TAPE AND REEL
LT6657AHMS8-2.5#TRPBF
LT6657BHMS8-2.5#TRPBF
LT6657AHMS8-3#TRPBF
LT6657BHMS8-3#TRPBF
LT6657AHMS8-5#TRPBF
LT6657BHMS8-5#TRPBF
PART MARKING*
LTGKN
LTGKN
LTGYG
LTGYG
LTGYH
LTGYH
PACKAGE DESCRIPTION
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
SPECIFIED TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
*Temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges. Parts ending with PBF are RoHS and WEEE compliant.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
This product is only offered in trays. For more information go to: http://www.linear.com/packaging/
Available Options
OUTPUT VOLTAGE INITIAL ACCURACY TEMPERATURE COEFFICIENT
2.5V 0.1%
0.1%
1.5ppm/°C
3ppm/°C
3V 0.1%
0.1%
1.5ppm/°C
3ppm/°C
5V 0.1%
0.1%
1.5ppm/°C
3ppm/°C
** See the Order Information section for complete part number listing.
ORDER PART NUMBER**
LT6657AHMS8-2.5
LT6657BHMS8-2.5
LT6657AHMS8-3
LT6657BHMS8-3
LT6657AHMS8-5
LT6657BHMS8-5
SPECIFIED TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
6657fb
2 For more information www.linear.com/LT6657


Part Number LT6657
Description Buffered Reference
Maker Linear Technology
Total Page 22 Pages
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