LT6660HCDC-10#TRPBF

Noise - 0.1Hz to 10Hz:	4ppmp-p
Base Part Number:	LT6660
Supplier Device Package:	3-DFN (2x2)
Package / Case:	3-WFSFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Current - Supply:	350µA
Voltage - Input:	12.5 V ~ 30 V
Noise - 10Hz to 10kHz:	4ppmrms
Series:	--
Temperature Coefficient:	20ppm/°C
Tolerance:	±0.2%
Current - Output:	20mA
Voltage - Output (Min/Fixed):	10V
Output Type:	Fixed
Reference Type:	Series
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Application Field and Working Principle of LT6660HCDC-10#TRPBF

The LT6660HCDC-10#TRPBF (LT6660) is a precision micropower voltage reference designed by Linear Technology. It features high accuracy and low current drain, and is ideal for portable or low-power applications in wide variety of fields such as portable instrumentation, systems monitoring, power supply active components, home appliances, and industrial control. The featured low current drain can minimize system power consumption and maximize battery life. The LT6660 is designed to provide an accurate +10V (±0.02%) voltage reference with low operating current (< 4 µA) and low temperature coefficient (< 30 ppm/ºC). The LT6660 can operate over a temperature range of -40ºC to +125ºC, and features robust power supply rejection (PSRR) of 40 dB at 10 Hz and 50 dB at 1 kHz. The LT6660 also includes a shutdown mode, where the device can be placed in a very low-power state. Furthermore, the LT6660 offers better than 0.01%/V line and load regulation, making it suitable for a wide range of systems for both output voltage and accuracy requirements.

Working Principle

The LT6660 voltage reference works on a common Zener reference principle. A Zener reference consists of a Zener diode with its anode connected to the supply voltage VDD, and its cathode connected to the output Vo. The Zener reference provides an output voltage that is equal to the Zener breakdown voltage Vz when the current passing through the diode reaches a defined value. To obtain an accurate voltage reference, the diode must be carefully designed with specific breakdown voltage ratings, temperature coefficients, and process parameters.The LT6660, however, implements a Zener voltage reference circuit using a low Vz, low dropout voltage argument transistor and a trimming circuit. This incorporated low dropout voltage argument transistor reduces the output noise without sacrificing the temperature characteristics, while a trimming circuit is used for voltage accuracy enhancement.

Conclusion

The LT6660HCDC-10#TRPBF (LT6660) is a precision micropower voltage reference from Linear Technology. It provides an accurate +10V (±0.02%) voltage reference with low operating current (< 4 µA) and low temperature coefficient (< 30 ppm/ºC). It is ideal for portable and low power applications. The LT6660 supports robust power supply rejection and can operate over a wide temperature range, making it a suitable voltage reference for a variety of systems and applications.

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