ADR1000
FEATURES
FUNCTIONAL BLOCK DIAGRAM
- High long-term stability
- 0.5 ppm/year long-term drift, typical (after first 3000 hours)
- Low Zener reference noise: 0.14 ppm p-p (0.9 µV p-p)
- Low temperature coefficient: <0.2 ppm/°C
- On-chip heater and temperature sensor
- Specified for
- 40°C to +125°C operation
- Pin‐patible upgrade to LTZ1000
APPLICATIONS
- High accuracy instrumentation
- Multimeters
- Weigh scales
- Electric balance
- Automatic test equipment
- Metrology equipment
- Standard cells
- Calibrators
Figure 1.
GENERAL DESCRIPTION
The ADR1000 is a 6.62 V, output highly stable, oven-controlled, buried Zener reference ponent built on an Analog Devices, Inc., proprietary bipolar process and is a pin-patible replacement for the LTZ1000. Included on the chip is a buried Zener reference, a heater resistor for temperature stabilization, and a temperature sensing transistor. External circuitry is used to set the operating currents and the temperature of the reference, allowing the...
