DS4303 Rev 1 8/06 Electronically Programmable Voltage Reference General Description Features The DS4303 is a nonvolatile (NV) electronically pro- Precise Electronically Adjustable Voltage grammable voltage reference. The reference voltage is Reference programmed in-circuit during factory calibration/ Enables Automated Factory Trimming of Devices programming. Programming the reference voltage, V , is as simple as applying the desired voltage on Needing Voltage Adjustment OUT V 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 Wide Adjustable Output Voltage Range Within cycled. The DS4303 replaces current cumbersome fac- tory adjustment arrangements with a low-cost solution 300mV of the Supply Rails that can be adjusted using automated techniques. In Low Temperature Coefficient addition, the DS4303 has the ability to be readjusted after the unit has been fully assembled and tested. This 1mA of Output-Current Drive results in a much more flexible manufacturing arrange- NV Memory Stores the Voltage Indefinitely ment, lower inventory costs, and a quicker time-to-market. Output Short-Circuit Protection Low Cost Applications Low Power Consumption Power-Supply Calibration 2.4V to 3.6V Single-Supply Operation Threshold Setting Small 5-Lead SOT23 Package Offset Nulling Bias Adjusting Power Amps Ordering Information Pressure Bridges PIN- SOT Factory-Calibrated Equipment PART TEMP RANGE PACKAGE MARK DS4303R/T&R -40C to +85C SOT23-5 4303 DS4303R+T&R -40C to +85C SOT23-5 4303+ +Denotes lead-free package. Typical Operating Circuit Pin Configuration EXISTING SOLUTION DS4303 SOLUTION TOP VIEW V CC ADJ15V CC REFERENCE VOLTAGE DS4303 V CC REFERENCE DS4303 V OUT 2 GND SHUNT VOLTAGE VOLTAGE GND REFERENCE V ADJ IN HAND SELECTED 0.1% RESISTOR V34 V OR MECHANICAL POT IN OUT ACCESS FOR AUTOMATED SOT23 ALIGNMENT Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLEElectronically Programmable Voltage Reference ABSOLUTE MAXIMUM RATINGS Voltage on V Relative to GND...........................-0.5V to +6.0V EEPROM Programming Adjust Temperature..........0C to +70C CC Voltage on V , ADJ, and V V to GND Short-Circuit Duration .........................Continuous IN OUT OUT Relative to GND ...-0.5V to (V + 0.5V), not to exceed +6.0V Storage Temperature Range .............................-55C to +125C CC Operating Temperature Range ...........................-40C to +85C 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 (T = -40C to +85C) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V (Note 1) 2.4 3.6 V CC V Voltage Range V 0.3 V - 0.3 V IN IN CC ADJ Logic 0 V -0.3 0.3 x V V IL CC V Current V -1 +1 mA OUT OUTI V Load V 100 pF OUT OUTL ELECTRICAL CHARACTERISTICS (V = +2.4 to +3.6V, T = -40C to +85C, unless otherwise noted.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Current I V , ADJ and V = open circuit 1.1 1.6 mA CC IN OUT V Resistance R 95 k IN PD ADJ Pullup Resistance R 18 k PU V Voltage Range V (Note 1) 0.3 V - 0.3 V OUT OUTR C C V Tracking Accuracy V (Note 2) 20 mV OUT OUTTA V Quantization V (Note 3) 1mV OUT OUTQ -40C to +85C, V = 0.4V 104 V/C OUT V Temperature Coefficient V -40C to +25C, V = 3.0V -5 +28 +62 OUT OUTTC OUT ppm/C +25C to +85C, V = 3.0V -31 -13 +6 OUT V Line Regulation V -4.0 +1.0 mV/V OUT OUTLN V Load Regulation V -1mA V +1mA 5.5 mV/mA OUT OUTLD OUTI Long-Term Stability V 1000 hours at +25C TBD ppm OUTLTS e 0.1Hz 10Hz 200 V n1 P-P V Noise OUT e 10Hz 1kHz 26 V n2 RMS V PSRR V = 200kHz 21 dB OUT OUTPSRR V Self-Adjust Settling Time t (Note 4) 11 15 ms/V OUT ST EEPROM Programming Time t (Note 5) 9 12 ms W Turn-On Time t V and ADJ = open circuit (Note 6) 10 s ON IN ADJ Toggle Low Time t 100 ns ADJ V Factory Trimmed Value V +25C, V = 3.3V (Note 7) 1200 mV OUT OUT FT CC 2 DS4303