Rev 0; 3/05
Voltage Sample and Infinite Hold
General Description
Features
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,
♦ Precise Electronically Adjustable Voltage
Reference
♦ Enables Automated Factory Trimming of Devices
Needing Voltage Adjustment
V
V
, is as simple as applying the desired voltage on
OUT
and toggling the adjust pin (ADJ) to lock the V
IN
OUT
♦ Can be Adjusted to Within 1mV
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.
♦ 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
Applications
♦ Low Power Consumption
Power-Supply Calibration
Threshold Setting
Offset Nulling
♦ 2.4V to 3.6V Single-Supply Operation
♦ Small 5-Lead SOT23 Package
Bias Adjusting
Power Amps
Ordering Information
Pressure Bridges
Factory-Calibrated Equipment
PIN-
SOT
PART
TEMP RANGE
PACKAGE
MARK
DS4303R/T&R
DS4303R+T&R
-40°C to +85°C
-40°C to +85°C
SOT23-5
SOT23-5
4303
4303+
+Denotes lead-free package.
Typical Operating Circuit
Pin Configuration
TOP VIEW
EXISTING SOLUTION
DS4303 SOLUTION
V
CC
ADJ
1
2
3
5
4
V
CC
REFERENCE
VOLTAGE
DS4303
V
CC
REFERENCE
VOLTAGE
DS4303
V
OUT
GND
SHUNT
VOLTAGE
REFERENCE
GND
V
ADJ
IN
HAND SELECTED
0.1% RESISTOR
OR MECHANICAL POT
V
IN
V
OUT
ACCESS FOR
AUTOMATED
ALIGNMENT
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.