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)
BENEFITS
SPECIFICATION
4.7KΩ
3.3KΩ
1
0.1% or 0.01%
0±100ppm/K
0.5mW
ELECTRICALLY ADJUSTABLE 4.7KΩ 1:1
Ω
RESISTOR PAIR
R1
R2
Low TCR, 1mW
MBD-472-AL
R1ADJ
e
e
R2ADJ
HGND
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
o
C
Suitable for operation from -40 to +125
o
C,
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: ~ 1sec
1
.
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
R1
R2
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
1
Adjustment precision is limited by temperature control, accuracy
of measurement and adjustment equipment and may increase
adjustment time
Information furnished by Microbridge Technologies is believed to be accurate and reliable. However, no responsibility is assumed by Microbridge Technologies for its use, nor for any
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.
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