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1. DESCRIPTION
The LTC®6655 is a complete family of precision bandgap voltage references, offering exceptional noise and drift performance. This low noise and drift is ideally suited for the high resolution measurements required by instrumentation and test equipment. In addition, the LTC6655 is fully specified over the temperature range of –40°C to 125°C, ensuring its suitability for demanding automotive and industrial applications. Advanced curvature compensation allows this bandgap reference to achieve a drift of less than 2ppm/°C with a predictable temperature characteristic and an output voltage accurate to ±0.025%, reducing or eliminating the need for calibration. The LTC6655LN Low Noise comes with a noise reduction pin that enables reduction of wideband noise with the addition of a single capacitor. The LTC6655 can be powered from as little as 500mV above the output voltage to as much as 13.2V. Superior load regulation with source and sink capability, coupled with exceptional line rejection, ensures consistent performance over a wide range of operating conditions. A shutdown mode is provided for low power applications. The LTC6655 references are offered in an 8-lead MSOP package and an 8-lead LS8 package. The LS8 is a 5mm × 5mm surface mount hermetic package that provides outstanding stability.
2. FEATURES
1. Low Noise:
2. 0.25ppmP-P (0.1Hz to 10Hz) 625nVP-P for the LTC6655-2.5
3. 0.21ppmRMS (10Hz to 1kHz) for the LTC6655LN CNR = 100µF
4. Low Drift: 2ppm/°C Max
5. High Accuracy: ±0.025% Max
6. No Humidity Sensitivity (LS8 Package)
7. Thermal Hysteresis (LS8): 30ppm (–40°C to 85°C)
8. Long-Term Drift (LS8): 20ppm/√kHr
9. 100% Tested at –40°C, 25°C and 125°C
10. Load Regulation: <10ppm/mA
11. Sinks and Sources Current: ±5mA
12. Low Dropout: 500mV
13. Maximum Supply Voltage: 13.2V
14. Low Power Shutdown: <20µA Max
15. Available Output Voltages: 1.25V, 2.048V, 2.5V, 3V, 3.3V, 4.096V, 5V
16. Available in an 8-Lead MSOP and High Stability Hermetic 5mm × 5mm LS8 Packages
3. APPLICATIONS
1. Instrumentation and Test Equipment
2. High Resolution Data Acquisition Systems
3. Weigh Scales
4. Precision Battery Monitors
5. Precision Regulators
6. Medical Equipment
4. Pin configuration
