The DS4303 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,
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 DS4303 replaces current cumbersome fac-
tory adjustment arrangements with a low-cost solution
that can be adjusted using automated techniques. In
addition, the DS4303 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.
Features
♦
Precise Electronically Adjustable Voltage
Reference
♦
Enables Automated Factory Trimming of Devices
Needing Voltage Adjustment
♦
Can be Adjusted to Within
±1mV
♦
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
♦
2.4V to 3.6V Single-Supply Operation
♦
Small 5-Lead SOT23 Package
DS4303
Applications
Power-Supply Calibration
Threshold Setting
Offset Nulling
Bias Adjusting
Power Amps
Pressure Bridges
Factory-Calibrated Equipment
Ordering Information
PART
DS4303R/T&R
TEMP RANGE
-40°C to +85°C
PIN-
PACKAGE
SOT23-5
SOT23-5
SOT
MARK
4303
4303+
DS4303R+T&R
-40°C to +85°C
+Denotes
lead-free package.
Typical Operating Circuit
TOP VIEW
ADJ
REFERENCE
VOLTAGE
V
CC
DS4303
V
OUT
GND
HAND SELECTED
0.1% RESISTOR
OR MECHANICAL POT
V
IN
ADJ
REFERENCE
VOLTAGE
Pin Configuration
EXISTING SOLUTION
V
CC
DS4303 SOLUTION
1
5
V
CC
SHUNT
VOLTAGE
REFERENCE
GND
2
DS4303
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.
Voltage Sample and Infinite Hold
DS4303
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 +85°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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Embedded System
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