The DS4305 is a nonvolatile (NV) electronically pro-
grammable voltage reference. The reference voltage is
programmed in-circuit during factory calibration/
programming. Programming the reference voltage,
V
OUT
, is as simple as applying the desired voltage on
V
IN
and toggling the adjust pin (ADJ) to lock the V
OUT
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
o
Low Power Consumption
o
4.0V to 5.5V Single-Supply Operation
o
Small 5-Lead SOT23 Package
o
-40°C to +125°C Temperature Operation
o
DS4305K Evaluation Kit is Available
Ordering Information
PART
DS4305R+T&R
TEMP RANGE
-40°C to +125°C
PIN-
PACKAGE
5 SOT23
SOT
MARK
4305+
+Denotes
lead-free package.
Typical Operating Circuit
EXISTING SOLUTION
V
CC
DS4305 SOLUTION
Pin Configuration
TOP VIEW
ADJ
1
5
V
CC
REFERENCE
VOLTAGE
V
CC
SHUNT
VOLTAGE
REFERENCE
DS4305
GND
HAND-SELECTED
0.1% RESISTOR
OR MECHANICAL POT
V
IN
ADJ
V
OUT
REFERENCE
VOLTAGE
GND
2
DS4305
V
IN
ACCESS FOR
AUTOMATED
ALIGNMENT
3
4
V
OUT
SOT23
______________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Electronically Programmable
Voltage Reference
DS4305
ABSOLUTE MAXIMUM RATINGS
Voltage on V
CC
Relative to GND ...........................-0.5V to +6.0V
Voltage on V
IN
,
ADJ,
and V
OUT
Relative to GND ...-0.5V to (V
CC
+ 0.5V), not to exceed +6.0V
Operating Temperature Range .........................-40°C to +125°C
EEPROM Programming Adjust Temperature..........0°C to +70°C
V
OUT
to GND Short-Circuit Duration .........................Continuous
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature ...See IPC/JEDEC J-STD-020 Specification
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
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