MBD-472-AL Datasheet, PDF (1/5 Pages) List of Unclassifed Manufacturers – Low TCR, 1mW Dual Rejustor™ Micro-Resistor

The Rejustor is a precision, electrically-adjustable
resistor from Microbridge. The Rejustor can be
adjusted to a precision of 0.1%, or better. The
Rejustor can be re-adjusted many times bi-
directionally within the active range using standard
hardware and LabVIEW-based Rejust-it calibration
software.
Low-power Rejustors are suitable for applications
where the total power dissipation (in the pair) does
not exceed 1mW.
As a passive device, there is no warm-up period or
boot-up time. Each Rejustor is independently
adjustable to any value in the 30% adjustment range
while still offering excellent TCR. They are non-
volatile, maintaining their adjusted value indefinitely.
Each Low-TCR Rejustor maintains 0ppm/K TCR
across the adjustment range within ±100ppm/K.
Relative TCR between both Rejustors is less than
±50ppm/K.
PARAMETER
Resistance (as-manufactured)
Minimum adjustable resistance
Adjustment Precision
TCR (per Rejustor)
Power dissipation (per Rejustor)
SPECIFICATION
4.7KΩ
3.3KΩ
0.1% or 0.01%¹
0±100ppm/K
0.5mW
BENEFITS
Precision electrical in-circuit adjustment
Externally adjust or calibrate parameters on
circuits or sensors at final assembly
Adjustment process isolated from circuit
allows true in-circuit calibration
Single chip solution to calibrate voltages,
currents, offsets, gains, etc.
No mechanical moving parts – suitable for
vibration sensitive applications
Improved reliability; dependability; dust and
moisture resistance over mechanical parts
Dynamic adjustment provides cost and labor
savings
Flexibility reduces rework cost
Low TCR, 1mW
Dual Rejustor™ Micro-Resistor
MBD-472-AL
ELECTRICALLY ADJUSTABLE 4.7KΩ 1:1
RESISTOR PAIR
R1
R2
R1ADJ _e
e ^R2ADJ
HGND
R1
R2
Figure 1: Functional Block Diagram
FEATURES
Electrically adjustable 4.7KΩ 1:1 dual resistor
Passive, non-volatile variable resistor
Adjustment range: 30% down from as-
manufactured resistance
Bi-directional adjustment within active range
Long term stability 0.5%, see Table 5
Flexibility: Potential for multiple adjustments
Stable Temperature Coefficient as resistance
is adjusted – TCR: 0±100ppm/K
Power Rating up to 1.0mW at 70^oC
Suitable for operation from -40 to +125^oC,
refer to Table 2
Passive device, requires no power to operate
or maintain adjustment
Easy to adjust with Rejust-it software and
external DAC/ADC hardware
Typical adjust times: ~ 1sec¹.
APPLICATIONS
Anywhere precision adjustment is required
Gain and offset adjustment
Reference voltage or current adjustment
Precision Voltage Regulator adjustment
Filter tuning
RF Amplifier biasing
Opto-electronics
Frequency Control devices
Mechanical or digital potentiometer
replacement
Suitable for high-frequency applications
1 _{Adjustment precision is limited by temperature control, accuracy}
of measurement and adjustment equipment and may increase
adjustment time
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infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any
patent or patent rights of Microbridge Technologies. Trademarks and registered trademarks are the property of their respective companies.
© 2007 Microbridge Technologies, Inc. 1980 Sherbrooke St. West, Montreal, Quebec, H3H 1E8 Tel: [phone] Fax: [phone]
Rev. 1.2
July 19, 2007