Datasheet ADR01, ADR02, ADR03, ADR06 (Analog Devices) - 9

Data Sheet ADR01/ADR02/ADR03/ADR06 TERMINOLOGY Dropout Voltage (VDO) Long-Term Stability (ΔVOUT_LTD)
Dropout voltage, sometimes referred to as supply voltage head- Long-term stability refers to the shift in output voltage at 25°C room or supply output voltage differential, is defined as the after 1000 hours of operation in a 25°C environment. This may minimum voltage differential between the input and output also be expressed as either a shift in voltage or a difference in necessary for the device to operate, such as parts per million from the nominal output as follows: VDO = (VIN – VOUT)min|IL = Constant ΔVOUT_LTD = |VOUT(t1) – VOUT(t0)| [V] Because the dropout voltage depends upon the current passing VOUT (t − 1 ) VOUT (t 0 ) 6 through the device, it is always specified for a given load current. ΔV = × OUT _ LTD 10 [ppm] VOUT (t0 )
Temperature Coefficient (TCVO)
The temperature coefficient relates the change in output voltage where, to the change in ambient temperature of the device, as normalized VOUT(t0) is the VOUT at 25°C at Time 0. by the output voltage at 25°C. This parameter is expressed in VOUT(t1) is the VOUT at 25°C after 1000 hours of operation at 25°C. ppm/°C and can be determined by the fol owing equation:
Line Regulation
V Line regulation refers to the change in output voltage in OUT (T − 2 ) VOUT( 1 T ) TCV = × O 106 [ppm/C] response to a given change in input voltage, and is expressed in VOUT 25 ( C)× (T −T ) 2 1 either percent per volt, parts per million per volt, or microvolt where: per volt change in input voltage. This parameter accounts for VOUT(25°C) is the output voltage at 25°C. the effects of self-heating. VOUT(T1) is the output voltage at Temperature 1.
Load Regulation
VOUT(T2) is the output voltage at Temperature 2. Load regulation refers to the change in output voltage in
Output Voltage Hysteresis (ΔVOUT_HYS)
response to a given change in load current, and is expressed Output voltage hysteresis represents the change in output in either microvolts per mil iampere, parts per million per voltage after the device is exposed to a specified temperature milliampere, or ohms of dc output resistance. This parameter cycle. This may be expressed as either a shift in voltage or a accounts for the effects of self-heating. difference in parts per million from the nominal output as fol ows: VOUT_HYS = VOUT(25°C) – VOUT_TC [V] V  OUT 25 ( C) −VOUT_ V = TC × OUT _ HYS  106 [ppm] VOUT 25 ( C) where: VOUT(25°C) is the output voltage at 25°C. VOUT_TC is the output voltage after temperature cycling. Thermal hysteresis occurs as a result of forces exhibited upon the internal die by its packaging. The effect is more pronounced in parts with smaller packages. Rev. R | Page 9 of 20 Document Outline Features Applications Pin Configurations General Description Revision History Specifications ADR01 Electrical Characteristics ADR02 Electrical Characteristics ADR03 Electrical Characteristics ADR06 Electrical Characteristics Absolute Maximum Ratings Thermal Resistance ESD Caution Terminology Typical Performance Characteristics Applications Information Overview Applying the ADR01/ADR02/ADR03/ADR06 Input and Output Capacitors Output Adjustment Temperature Monitoring Low Cost Current Source Precision Current Source with Adjustable Output Programmable 4 mA to 20 mA Current Transmitter Precision Boosted Output Regulator Outline Dimensions Ordering Guides ADR01 Ordering Guide ADR02 Ordering Guide ADR03 Ordering Guide ADR06 Ordering Guide Automotive Products