DS4303K Fast Delivery |IC PHOENIX CO.,LIMITED

DS4303K ,Electronically Programmable Voltage ReferenceApplications♦ Low Power ConsumptionPower-Supply Calibration♦ 2.4V to 3.6V Single-Supply OperationTh ..
DS4402N+T&R ,Two/Four-Channel, I²C Adjustable Current DACApplications 2Devices on Same I C BusPower-Supply Adjustment ♦ Small Package (14-Pin TDFN)♦ -40°C t ..
DS4402N+TR , Two/Four-Channel, I2C Adjustable Current DAC
DS4404N+ ,Two/Four-Channel, I²C Adjustable Current DACELECTRICAL CHARACTERISTICS(V = +2.7V to +5.5V, T = -40°C to +85°C.)CC APARAMETER SYMBOL CONDITIONS ..
DS4404N+TR , Two/Four-Channel, I2C Adjustable Current DAC
DS4412U+T , Dual-Channel, I2C Adjustable Sink/Source Current DAC
EC2-12NU ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-24 ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-24NU ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-4.5NJ ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-4.5NU ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-4.5TNU ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE

DS4303K
Electronically Programmable Voltage Reference
General Description
The DS4303 is a nonvolatile (NV) electronically pro-
grammable 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
VINand toggling the adjust pin (ADJ) to lock the VOUT
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
FeaturesPrecise Electronically Adjustable Voltage
ReferenceEnables Automated Factory Trimming of Devices
Needing Voltage AdjustmentCan be Adjusted to Within ±1mVWide Adjustable Output Voltage Range Within
300mV of the Supply RailsLow Temperature Coefficient±1mA of Output-Current DriveNV Memory Stores the Voltage IndefinitelyOutput Short-Circuit ProtectionLow CostLow Power Consumption2.4V to 3.6V Single-Supply OperationSmall 5-Lead SOT23 Package
DS4303
Electronically Programmable
Voltage Reference
GND
VOUTVINVCCADJ
DS4303
SOT23
TOP VIEW
Pin Configuration
Ordering Information
SHUNT
VOLTAGE
REFERENCE
ACCESS FOR
AUTOMATED
ALIGNMENT
REFERENCE
VOLTAGE
REFERENCE
VOLTAGE
HAND SELECTED
0.1% RESISTOR
OR MECHANICAL POT
EXISTING SOLUTIONDS4303 SOLUTION
DS4303
VCC
GND
VOUT
VINADJ
VCC
Typical Operating Circuit
Rev 1; 8/06
EVALUATION KIT
AVAILABLE
PARTTEMP RANGEPIN-
PACKAGE
SOT
MARK
DS4303R/T&R-40°C to +85°CSOT23-54303
DS4303R+T&R-40°C to +85°CSOT23-54303+
+Denotes lead-free package.
DS4303
Electronically Programmable
Voltage Reference
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITIONS
(TA= -40°C to +85°C)
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.
Voltage on VCCRelative 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
VOUTto GND Short-Circuit Duration .........................Continuous
Storage Temperature Range.............................-55°C to +125°C
Soldering Temperature...See IPC/JEDEC J-STD-020 Specification
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Supply VoltageVCC(Note 1)2.43.6V
VIN Voltage RangeVIN0.3VCC - 0.3V
ADJ Logic 0VIL-0.30.3 x VCCV
VOUT CurrentVOUTI-1+1mA
VOUT LoadVOUTL100pF
ELECTRICAL CHARACTERISTICS
(VCC= +2.4 to +3.6V, TA= -40°C to +85°C, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Supply CurrentICCVIN, ADJ and VOUT = open circuit1.11.6mA
VIN ResistanceRPD95kΩ
ADJ Pullup ResistanceRPU18kΩ
VOUT Voltage RangeVOUTR(Note 1)0.3V C C - 0.3V
VOUT Tracking AccuracyVOUTTA(Note 2)±20mV
VOUT QuantizationVOUTQ(Note 3)±1mV
-40°C to +85°C, VOUT = 0.4V±104µV/°C
-40°C to +25°C, VOUT = 3.0V-5+28+62VOUT Temperature CoefficientVOUTTC
+25°C to +85°C, VOUT = 3.0V-31-13+6ppm/°C
VOUT Line RegulationVOUTLN-4.0+1.0mV/V
VOUT Load RegulationVOUTLD-1mA ≤ VOUTI ≤ +1mA5.5mV/mA
Long-Term StabilityVOUTLTS1000 hours at +25°CTBDppm
en10.1Hz ≤ ƒ ≤ 10Hz200µVP-PVOUT Noiseen210Hz ≤ ƒ ≤ 1kHz26µVRMS
VOUT PSRRVOUTPSRRƒ= 200kHz21dB
VOUT Self-Adjust Settling TimetST(Note 4)1115ms/V
EEPROM Programming TimetW(Note 5)912ms
Turn-On TimetONVIN and ADJ = open circuit (Note 6)10µs
ADJ Toggle Low TimetADJ100ns
VOUT Factory Trimmed ValueVOUT FT+25°C, VCC = 3.3V (Note 7)1200mV
DS4303
Electronically Programmable
Voltage Reference
ACTIVE SUPPLY CURRENT
vs. TEMPERATURE (VOUT = 0.3V)
DS4303 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (mA)3510-15
VCC = 3.3V
VCC = 3.6V
VCC = 3.0V
VCC = 2.4V
IL = 0mAADJ = VCC1.27
ACTIVE SUPPLY CURRENT
vs. TEMPERATURE (VOUT = 3.0V)
DS4303 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (mA)3510-15-4085
VCC = 3.3V
VCC = 3.6V
IL = 0mAADJ = VCC
ACTIVE SUPPLY CURRENT
vs. SUPPLY VOLTAGE
DS4303 toc03
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
TA = -40°C
TA = +25°C
TA = +85°C
IL = 0mA
Typical Operating Characteristics
(VCC= 3.3V, TA= +25°C, unless otherwise noted.)
Note 1:All voltages referenced to ground.
Note 2:Tracking accuracy is defined as VOUT- VINafter the DS4303 has completed self-adjustment.
Note 3:Quantization refers to the size of the voltage steps used to track the input signal.
Note 4:Settling time is the maximum amount of time VOUTrequires to self-adjust. The settling time is determined by the following
formula: ΔVOUTx tST.
Note 5:EEPROM programming time is the hold time required after the DS4303 has completed self-adjustment before VINor VCC
can be removed or before ADJcan be toggled low once again.
Note 6:Turn-on time is defined as the time required for VOUTto reach its specified accuracy after the required supply voltage is
applied.
Note 7:VOUTnot loaded.
Note 8:Guaranteed by design.
NONVOLATILE MEMORY CHARACTERISTICS
(VCC= +2.4V to 3.6V, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Programming Cycles+70°C (Note 8)50,000Cycles
DS4303
Electronically Programmable
Voltage Reference
Typical Operating Characteristics (continued)
(VCC= 3.3V, TA= +25°C, unless otherwise noted.)
LINE REGULATION
(VOUT = 3.0V)
DS4303 toc07
SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE CHANGE (
TA = -40°C
TA = +25°C
TA = +85°C
IL = 0mA
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VCC = 3.6V)
DS4303 toc08
FREQUENCY (kHz)
PSRR (dB)
1001,000
VOUT = 0.3 V,
VCC-AC = 300mV
VOUT = 3.0 V,
VCC-AC = 300mVRMS
DS4303 OUTPUT NOISE
(0.1Hz TO 10Hz)
DS4303 toc09
TIME (s)
OUT21
VCC = 3.6VVOUT = 3.0V
DS4303 OUTPUT NOISE
(10Hz to 1kHz)
FREQUENCY (Hz)
OUT NOISE
/
DS4303 toc10
VCC = 3.6VVOUT = 3.0V
VOLTS
DS4303 TURN-ON
TRANSIENT
DS4303 toc11
1μs/div
VCC
VOUT
COUT =100pF
DS4303 LOAD TRANSIENT
(VOUT = 3.3V, VCC = 3.6V)
DS4303 toc12
0.2ms/div
+1mA
-1mA
VOUT
AC-COUPLED
200mV/div
IOUT
LOAD REGULATION
(VOUT = 3.0V)
DS4303 toc05
LOAD CURRENT (mA)
OUTPUT VOLTAGE (mV)
VCC = 3.6V
TA = -40°C
TA = +25°C
TA = +85°C
LINE REGULATION
(VOUT = 0.3V)
DS4303 toc06
SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE CHANGE (
TA = -40°C
TA = +25°C
TA = +85°C
IL = 0mA
LOAD REGULATION
(VOUT = 0.3V)
DS4303 toc04
LOAD CURRENT (mA)
OUTPUT VOLTAGE CHANGE (mV)
VCC = 3.0V
TA = -40°C
TA = +25°C
TA = +85°C
DS4303
Electronically Programmable
Voltage Reference
DS4303 LINE TRANSIENT
(VOUT = 2.0)
DS4303 toc13
0.2ms/div
3.6V
VCC
3.0V
VOUT
AC-COUPLED
200mV/div
DS4303 SHUTDOWN TRANSIENT
(VOUT = 3.3V)
DS4303 toc14
2ms/div
500mV/div
VCCVOUT
COUT = 100pF
DS4303 VOUT ADJUST TRANSIENT
(VCC = 3.6V, VIN = 3.3V)
DS4303 toc15
5ms/div
2V/div
1V/div
ADJ
VOUT
DS4303 NORMALIZED VOUT
vs. TEMPERATURE (VOUT = 0.4V)
DS4303 toc16
TEMPERATURE (°C)
OUT
(V/V)3510-15
VCC = 3.3V
DS4303 NORMALIZED VOUT
vs. TEMPERATURE (VOUT = 3.0V)
DS4303 toc17
TEMPERATURE (°C)
OUT
(V/V)3510-15-4085
VCC = 3.3V
Typical Operating Characteristics (continued)
(VCC= 3.3V, TA= +25°C, unless otherwise noted.)
DS4303
Electronically Programmable
Voltage Reference
Detailed Description
The DS4303 provides a precise, NV output voltage,
VOUT, making it an ideal solution for factory calibration
of embedded systems. The DS4303 output voltage can
be adjusted over almost the entire operating supply
range of the device, and it can be precisely set to with-
in ±1mV. A graphical description of the DS4303 is pro-
vided in the block diagram.
During factory calibration, a simple adjustment proce-
dure must be followed. This entire procedure includes
setting VIN, toggling ADJ, waiting as VOUTself-adjusts,
and waiting for the completion of the EEPROM storage
cycle (See the timing diagram in Figure 1). At the start
of calibration, a voltage must be placed on VIN. This
voltage needs to be completely stable before the
adjustment procedure begins, and it must remain sta-
ble throughout the entire adjustment procedure. The
DS4303 will start its self-adjust procedure when the
ADJpin is pulled low and held low for at least tADJ,
after which it can be released at any time. Once ADJ
has been released, it should not be toggled again for
the remainder of the adjustment procedure. After the
falling edge on ADJand the wait time, tADJ, the VOUT
self-adjust period begins. The length of the VOUTself-
adjust period can be determined using the formula ΔV x tST, where ΔV is | VOUT OLD- VOUT NEW|.
ADJ
GND
VOUT
VCC
VCC
VIN
VCC
RPD
RPU
VREF
ADC
AND
CONTROL
EEPROM
12-BIT
DAC
DS4303
Figure 1. Timing Diagram
PINNAMEFUNCTIONADJAdjust Control InputGNDGround
3VINSample Voltage InputVOUTVoltage Output
5VCCPower-Supply Voltage
Pin Description
Block Diagram
VOUT
VIN
ADJtW
FIRST PROGRAMMING CYCLEADDITIONAL PROGRAMMING CYCLES (IF REQUIRED)
tADJtADJtADJ
ΔVOUT x tSTΔVOUT x tST
ΔVOUTΔVOUT

Partno	Mfg	Dc	Qty	Available	Descript
DS4303K	MAXIM	N/a	1500	avai	Electronically Programmable Voltage Reference