Document
Rev 0; 3/05
www.DataSheet4U.com
Voltage Sample and Infinite Hold
General Description
The DS4303 is a nonvolatile (NV) sample and infinitehold adjustable voltage reference. The reference voltage 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 DS4303 replaces current cumbersome factory 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 arrangement, 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 PINPACKAGE 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 VCC DS4303 VOUT GND HAND SELECTED 0.1% RESISTOR OR MECHANICAL POT VIN ADJ REFERENCE VOLTAGE
Pin Configuration
EXISTING SOLUTION VCC
DS4303 SOLUTION
1
5
VCC
SHUNT VOLTAGE REFERENCE
GND
2
DS4303
VIN
ACCESS FOR AUTOMATED ALIGNMENT
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 Maxim’s website at www.maxim-ic.com.
www.DataSheet4U.com
Voltage Sample and Infinite Hold DS4303
ABSOLUTE MAXIMUM RATINGS
Voltage on VCC Relative to GND ...........................-0.5V to +6.0V Voltage on VIN, ADJ, and VOUT Relative to GND ...-0.5V to (VCC + 0.5V), not to exceed +6.0V Operating Temperature Range ...........................-40°C to +85°C EEPROM Programming Adjust Temperature..........0°C to +70°C VOUT 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.
RECOMMENDED OPERATING CONDITIONS
(TA = -40°C to +85°C)
PARAMETER Supply Voltage VIN Voltage Range ADJ Logic 0 VOUT Current VOUT Load SYMBOL VCC VIN VIL VOUTI VOUTL (Note 1) CONDITIONS MIN 2.4 0.3 -0.3 -1 TYP MAX 3.6 VCC - 0.3 0.3 x VCC +1 100 UNITS V V V mA pF
ELECTRICAL CHARACTERISTICS
(VCC = +2.4 to +3.6V, TA = -40°C to +85°C, unless otherwise noted.)
PARAMETER Supply Current VIN Resistance ADJ Pullup Resistance VOUT Voltage Range VOUT Tracking Accuracy VOUT Quantization VOUT Temperature Coefficient VOUT Line Regulation VOUT Load Regulation Long-Term Stability VOUT Noise VOUT PSRR VOUT Self-Adjust Settling Time EEPROM Programming Time Turn-On Time ADJ Toggle Low Time VOUT Factory Trimmed Value SYMBOL ICC RPD RPU VOUTR VOUTTA VOUTQ VOUTTC VOUTLN VOUTLD VOUTLTS en1 en2 VOUTPSRR tST tW tON tADJ VOUT FT +25°C, VCC = 3.3V (Note 7) -1mA ≤ VOUTI ≤ +1mA 1000 hours at +25°C 0.1Hz ≤ ƒ ≤ 10Hz 10Hz ≤ ƒ ≤ 1kHz ƒ= 200kHz (Note 4) (Note 5) VIN and ADJ = open circuit (Note 6) 100 1200 TBD 200 26 21 11 9 15 12 10 (Note 1) (Note 2) (Note 3) -40°C to +85°C, VOUT = 0.4V -40°C to +25°C, VOUT = 3.0V +25°C to +85°C, VOUT = 3.0V -5 -31 -4.0 ±104 +28 -13 +62 +6 +1.0 5.5 CONDITIONS VIN, ADJ and VOUT = open circuit 95 18 0.3 VCC - 0.3 ±20 ±1 MIN TYP 1.1 MAX 1.6 UNITS mA kΩ kΩ V mV mV µV/°C ppm/°C mV/V mV/mA ppm µVP-P µVRMS dB ms/V ms µs ns mV
2
_____________________________________________________________________
www.DataSheet4U.com
Voltage Sample and Infinite Hold
NONVOLATILE MEMORY CHARACTERISTICS
(VCC = +2.4V to 3.6V, unless otherwise noted.)
PARAMETER Programming Cycles SYMBOL +70°C (Note 8) CONDITIONS MIN 50,000 TYP MAX UNITS Cycles
DS4303
Note 1: Note 2: Note 3: Note 4: Note 5: Note 6: Note 7: Note 8:
All voltages referenced to ground. Tracking accuracy is defined as VOUT - VIN after the DS4303 has comple.