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| DS4305 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – Sample-and-Infinite Hold Voltage Reference | |||
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Rev 0; 1/06
EVAALVUAAILTAIOBNLEKIT
Sample-and-Infinite Hold
Voltage Reference
General Description
The DS4305 is a nonvolatile (NV) sample-and-infinite-
hold adjustable voltage reference. The reference volt-
age is programmed in-circuit during factory calibration/
programming. Programming the reference voltage,
VOUT, is as simple as applying the desired voltage on
VIN and toggling the adjust pin (ADJ) to lock the VOUT
voltage level indefinitely, even if the device is power
cycled. The DS4305 replaces current cumbersome fac-
tory adjustment arrangements with a low-cost solution
that can be adjusted using automated techniques. In
addition, the DS4305 has the ability to be readjusted
after the unit has been fully assembled and tested. This
results in a much more flexible manufacturing arrange-
ment, lower inventory costs, and a quicker time-to-market.
Applications
Power-Supply Calibration
Threshold Setting
Offset Nulling
Bias Adjusting
Power Amps
Pressure Bridges
Factory-Calibrated Equipment
Features
⦠Precise Electronically Adjustable Voltage
Reference
⦠Enables Automated Factory Trimming of Devices
Needing Voltage Adjustment
⦠Can be Adjusted to Within ±1.5mV
⦠Wide Adjustable Output Voltage Range Within
300mV of the Supply Rails
⦠Low Temperature Coefficient
⦠±1mA of Output-Current Drive
⦠NV Memory Stores the Voltage Indefinitely
⦠Output Short-Circuit Protection
⦠Low Cost
⦠Low Power Consumption
⦠4.0V to 5.5V Single-Supply Operation
⦠Small 5-Lead SOT23 Package
⦠-40°C to +125°C Temperature Operation
⦠DS4305K Evaluation Kit is Available
Ordering Information
PART
TEMP RANGE
DS4305R+T&R -40°C to +125°C
+Denotes lead-free package.
PIN-
PACKAGE
5 SOT23
SOT
MARK
4305+
Typical Operating Circuit
Pin Configuration
EXISTING SOLUTION
DS4305 SOLUTION
VCC
SHUNT
VOLTAGE
REFERENCE
REFERENCE
VOLTAGE
HAND-SELECTED
0.1% RESISTOR
OR MECHANICAL POT
VCC
DS4305
VOUT
GND
VIN
ADJ
REFERENCE
VOLTAGE
ACCESS FOR
AUTOMATED
ALIGNMENT
TOP VIEW
ADJ 1
5 VCC
GND 2 DS4305
VIN 3
4 VOUT
SOT23
______________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maximâs website at www.maxim-ic.com.
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