Analog DevicesADR3625ARMZVoltage References

ADR3625: Precision, Micropower, High Current Output Voltage Reference

The ADR3625 is a low-power, high-precision voltage reference that features a maximum temperature coefficient of 3 ppm/°C for the B grade in an 8-lead MSOP.

The LTC4296-1 is designed for interoperability with 802.3cg powered devices (PDs) in 24 V or 54 V systems. The LTC4296-1 delivers power using external, low drain-to-source on resistance (RDS(ON)), N-channel metal-oxide semiconductor field-effect transistors (MOSFETs), which minimize voltage drop and ensure application ruggedness.

Capable of sourcing up to 70 mA, the ADR3625 is an exceptional replacement to standard low dropout (LDO) regulators. For high accuracy, the output voltage and temperature coefficient are trimmed during production using the Analog Devices, Inc., proprietary DigiTrim® technology.

The low thermal hysteresis (–7 ppm) and low long-term drift (160 ppm at 4500 Hr) improve system lifetime accuracy. A minimum load capacitance of 0.1 μF is required for operation. The ADR3625 is specified over the –40°C to +125°C operating temperature range.

Key Features and Benefits

• High output current and low temperature coefficient improves performance
  • 3 ppm/°C (B grade)
  • 6 ppm/°C (A grade)
• 1.8V logic enables use with low voltage converters and micro controllers
• Output current capacity (typical): 70 mA sourcing/20 mA sinking
• Low quiescent current: 65 μA
• Low shutdown current: 1.5 μA
• Output voltage noise (0.1 Hz to 10 Hz): 3 ppm p-p
• Maximum initial output voltage error
• ±0.04% (B grade)
• ±0.08% (A grade)
• Operating temperature range: −40°C to +125°C
• Maximum input voltage: 16 V
• Low dropout voltage: 0.25 V
• 8-Lead MSOP package

Applications

• Precision power supplies
• Portable instrumentation
• Process transmitters
• Remote sensors
• Medical instrumentation
• Auto battery monitors

Evaluation Board

The ADR3625 can be evaluated with the EVAL-ADR3625EBZ.

Block Diagrams and Tables