DS4303 ,Voltage Sample and Infinite HoldApplications♦ Low Power ConsumptionPower-Supply Calibration♦ 2.4V to 3.6V Single-Supply OperationTh ..
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
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
DS4303
Voltage Sample and Infinite Hold
General DescriptionThe 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,
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.
ApplicationsPower-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 Drive
NV Memory Stores the Voltage IndefinitelyOutput Short-Circuit ProtectionLow CostLow Power Consumption2.4V to 3.6V Single-Supply OperationSmall 5-Lead SOT23 Package
DS4303
Voltage Sample and Infinite Hold
Pin Configuration
Ordering Information
Typical Operating CircuitRev 0; 3/05
+Denotes lead-free package.
DS4303
Voltage Sample and Infinite Hold
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITIONSStresses 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
ELECTRICAL CHARACTERISTICS
DS4303
Voltage Sample and Infinite Hold
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: ∆VOUTx 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
DS4303
Voltage Sample and Infinite Hold
Typical Operating Characteristics (continued)(VCC= 3.3V, TA= +25°C, unless otherwise noted.)
DS4303
Voltage Sample and Infinite Hold
Typical Operating Characteristics (continued)(VCC= 3.3V, TA= +25°C, unless otherwise noted.)
DS4303
Voltage Sample and Infinite Hold
Detailed DescriptionThe 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
∆V x tST, where ∆V is | VOUT OLD- VOUT NEW|.
