DS4303 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – Voltage Sample and Infinite Hold

Rev 0; 3/05
Voltage Sample and Infinite Hold
General Description
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.
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 ±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
Ordering Information
PART
TEMP RANGE
DS4303R/T&R -40°C to +85°C
DS4303R+T&R -40°C to +85°C
+Denotes lead-free package.
PIN-
PACKAGE
SOT23-5
SOT23-5
SOT
MARK
4303
4303+
Typical Operating Circuit
EXISTING SOLUTION
DS4303 SOLUTION
VCC
SHUNT
VOLTAGE
REFERENCE
REFERENCE
VOLTAGE
HAND SELECTED
0.1% RESISTOR
OR MECHANICAL POT
DS4303
VCC
VOUT
GND
VIN
ADJ
REFERENCE
VOLTAGE
ACCESS FOR
AUTOMATED
ALIGNMENT
Pin Configuration
TOP VIEW
ADJ 1
5 V_CC
GND 2 ^DS4303
V_IN 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.