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DC2095A-B

P1-P3P4-P4
1
dc2095af
DEMO MANUAL DC2095A
DESCRIPTION
LTC6655
0.25ppm Noise, Low Drift
Precision Reference
Demonstration circuit 2095A features the LTC
®
6655, a
precision low drift reference packaged in a hermetic LS8.
The demonstration circuit is available with the 2.5V, 4.096V
or 5V output voltage option parts.
The demo board circuit shows the optimal layout for overall
reference performance. The LTC6655 has a maximum
drift of 2ppm/°C and an initial accuracy of ±0.025%. The
hermetic package further improves the Long Term Drift
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.
PERFORMANCE SUMMARY
performance of the reference to 20ppm/√kHr. Another
benefit of the hermetic package is improved humidity
performance. Testing has shown that humidity can cause
the PCB to deform and stress the package. To reduce this
effect the ground plane is removed directly under the
reference. Doing this reduces output voltage shift as a
result of humidity to less than 10ppm.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2095A
Specifications are at T
A
= 25°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input Supply Range V
OUT
+ 0.5 13 V
V
OUT
Output Voltage Accuracy –0.025 +0.025 %
Long-Term Drift of Output Voltage 20 ppm/√kHr
I
Q
Supply Current 5 mA
2
dc2095af
DEMO MANUAL DC2095A
With the demonstration circuit, it is easy to set up and
evaluate the performance of the LTC6655. Refer to Figure1
for proper measurement equipment setup and follow the
procedure below:
1. With the power off, connect the power supply positive
to V
IN
and the common to GND. With default settings,
the supply can range from V
OUT
+0.5V to 13V.
2. Connect a DVM to the V
OUT
turret with the common
connection connected to ground.
3. Turn on power supply and confirm reference operation.
Figure 1. Test Setup
2.500V
3.00V
QUICK START PROCEDURE
3
dc2095af
DEMO MANUAL DC2095A
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
SCHEMATIC DIAGRAM
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P1-P3P4-P4

DC2095A-B

Mfr. #:
Buy DC2095A-B
Manufacturer:
Analog Devices Inc.
Description:
Power Management IC Development Tools LTC6655BHLS8-4V Demo Board - Ultra Low
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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