LTC6655/LTC6655LN
0.25ppm Noise, Low Drift
Precision References
FEATURES DESCRIPTION
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Low Noise: The LTC 6655 is a complete family of precision bandgap
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0.25ppm (0.1Hz to 10Hz) 625nV for the voltage references, offering exceptional noise and drift
P-P P-P
LTC6655-2.5 performance. This low noise and drift is ideally suited
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0.21ppm (10Hz to 10kHz) for the for the high resolution measurements required by instru-
RMS
LTC6655LN-2.5 C = 100F mentation and test equipment. In addition, the LTC6655
NR
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Low Drift: 2ppm/C Max is fully specified over the temperature range of 40C
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High Accuracy: 0.025% Max to 125C, ensuring its suitability for demanding auto-
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No Humidity Sensitivity (LS8 Package) motive and industrial applications. Advanced curvature
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Thermal Hysteresis (LS8): 30ppm (40C to 85C) compensation allows this bandgap reference to achieve a
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Long-Term Drift (LS8): 20ppm/kHr drift of less than 2ppm/C with a predictable temperature
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100% Tested at 40C, 25C and 125C characteristic and an output voltage accurate to 0.025%,
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Load Regulation: <10ppm/mA reducing or eliminating the need for calibration.
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Sinks and Sources Current: 5mA
The LTC6655LN Low Noise comes with a noise reduction
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Low Dropout: 500mV
pin that enables reduction of wideband noise with the
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Maximum Supply Voltage: 13.2V
addition of a single capacitor.
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Low Power Shutdown: <20A Max
n The LTC6655 can be powered from as little as 500mV
Available Output Voltages: 1.25V, 2.048V, 2.5V, 3V,
above the output voltage to as much as 13.2V. Superior
3.3V, 4.096V, 5V
n load regulation with source and sink capability, coupled
Available in an 8-Lead MSOP and High Stability
with exceptional line rejection, ensures consistent per-
Hermetic 5mm 5mm LS8 Packages
formance over a wide range of operating conditions. A
shutdown mode is provided for low power applications.
APPLICATIONS
n The LTC6655 references are offered in an 8-lead MSOP
Instrumentation and Test Equipment
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package and an 8-lead LS8 package. The LS8 is a
High Resolution Data Acquisition Systems
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Weigh Scales 5mm 5mm surface mount hermetic package that pro-
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Precision Battery Monitors vides outstanding stability.
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Precision Regulators
All registered trademarks and trademarks are the property of their respective owners.
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Medical Equipment
TYPICAL APPLICATION
Basic Connection
Low Frequency 0.1Hz to 10Hz Noise (LTC6655-2.5)
LTC6655-2.5
3V < V 13.2V V V V
IN OUT
IN OUT_F
C
IN
SHDN V
OUT_S
C
0.1F OUT
GND
10F
6655 TA01a
500nV/DIV
Basic Connection with Noise Reduction
LTC6655LN-2.5
3V < V 13.2V V
V V
IN IN OUT OUT
C
IN
C
SHDN NR OUT
0.1F
10F 6655 TA01b
C
GND NR 1s/DIV
10F
6655 TA01c
Rev. G
1
Document Feedback For more information www.analog.comLTC6655/LTC6655LN
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Voltage Operating Temperature Range (Note 2).. 40C to 125C
V to GND .......................................... 0.3V to 13.2V Storage Temperature Range (Note 2) ..... 65C to 150C
IN
SHDN to GND ........................... 0.3V to (V + 0.3V) Lead Temperature Range (Soldering, 10 sec)
IN
Output Voltage: (Note 3) .................................................................300C
V ....................................... 0.3V to (V + 0.3V)
OUT_F IN
V ..................................................... 0.3V to 6V
OUT_S
NR ........................................................... 0.3V to 6V
Output Short-Circuit Duration ...................... Indefinite
PIN CONFIGURATION
LTC6655 LTC6655LN
TOP VIEW TOP VIEW
SHDN 1 8 GND SHDN 1 8 GND
V 2 7 V V 2 7 V
IN OUT_F IN OUT_F
GND 3 6 V GND 3 6 NR
OUT_S
GND 4 5 GND GND 4 5 GND
MS8 PACKAGE MS8 PACKAGE
8-LEAD PLASTIC MSOP 8-LEAD PLASTIC MSOP
T = 150C, = 300C/W T = 150C, = 300C/W
JMAX JA JMAX JA
STAR ALL GND CONNECTIONS AT PIN 4 STAR ALL GND CONNECTIONS AT PIN 4
LTC6655
TOP VIEW
GND
8
SHDN 1 7 V
OUT_F
V 2 6 V
IN OUT_S
GND 3 5 GND
4
GND
LS8 PACKAGE
8-PIN LEADLESS CHIP CARRIER (5mm 5mm)
T = 150C, = 120C/W
JMAX JA
STAR ALL GND CONNECTIONS AT PIN 4
Rev. G
2
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