PRECISION 2.5 VOLT MICROPOWER VOLTAGE REFERENCE

www.DataSheet4U.com PRECISION 2.5 VOLT MICROPOWER VOLTAGE REFERENCE ISSUE 4 - APRIL 2002 ZRA250 DEVICE DESCRIPTION The ZRA250 uses a bandgap circuit design to achieve a precision micropower voltage reference of 2.5 volts. The device is available in small outline surface mount packages, ideal for applications where space saving is important. The ZRA250 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZRA250 is recommended for operation between 50µA and 5mA and so is ideally suited to low power and battery powered applications. Excellent performance is maintained to an absolute maximum of 25mA, however the rugged design and 20 volt processing allows the reference to withstand transient effects and currents up to 200mA. Superior switching capability allows the device to reach stable operating conditions in only a few microseconds. FEATURES • • • • • • • • • • • • • • • Small outline SOT23, SO8 and TO92 style packages. No stabilising capacitor required Typical TC 30ppm/°C Typical slope resistance 0.4Ω ± 3%, 2%,1% and 0.5% tolerance Industrial temperature range Operating current 50µA to 5mA Transient response, stable in less than 10µs Optional extended current range APPLICATIONS Battery powered and portable equipment. Metering and measurement systems. Instrumentation. Test equipment. Data acquisition systems. Precision power supplies. SCHEMATIC DIAGRAM VR Note: 3%, 2% and 1% tolerance devices are not recommended for new designs. Refer to ZRC250 G nd 4-232 ZRA250 ABSOLUTE MAXIMUM RATING Reverse Current Forward Current Operating Temperature Storage Temperature 25mA 25mA -40 to 85°C -55 to 125°C Power Dissipation (Tamb=25°C) SOT23 330mW E-Line, 3 pin (TO92) 500mW E-Line, 2 pin (TO92) 500mW SO8 625mW ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25°C SYMBOL PARAMETER CONDITIONS MIN VR Reverse Breakdown Voltage IR=150µA 2.4875 2.475 2.45 2.425 LIMITS TYP 2.5 2.5 2.5 2.5 25 0.05 30 0.4 0.3 MAX 2.5125 2.525 2.55 2.575 50 5 90 2 0.8 0.5 1 2 3 V TOL. % UNITS IMIN IR TC † RS § ZR Minimum Operating Current Recommended Operating Current Average Reverse Breakdown Voltage Temp. Co. IR(min) to IR(max) Slope Resistance Reverse Dynamic Impedance IR = 1mA f = 100Hz IAC= 0.1 IR Wideband Noise Voltage IR = 150µA f = 10Hz to 10kHz µA mA ppm/°C Ω Ω EN 45 µV(rms) Reverse Current (µA) † TC = (VR(max)−VR(min)) x 1000000 VR x (T(max)−T(min)) 60 50 40 30 20 10 0 0.2 0.6 1.0 1.4 1.8 2.2 2.6 TA 5°C =8 5°C C =2 ° TA -40 = TA Note: VR(max) - VR(min) is the maximum deviation in reference voltage measured over the full operating temperature range. § RS = VR Change (IR (min) to IR (max)) IR (max) − IR (min) Reverse Voltage (V) Reverse Characteristics 4-233 ZRA250 TYPICAL CHARACTERISTICS 1.4 2.53 IR =150µA to 5mA Forward Voltage (V) 1.0 0.8 0.6 0.4 0.2 0.1 1 10 100 1000 Reference voltage (V) 1.2 2.52 2.51 2.50 2.49 2.48 2.47 -40 -20 0 20 40 60 80 Forward Current (mA) Temperature (°C) Forward Characteristics Temperature Drift 1000 IR=150µA Slope resistance (Ω) Slope resistance (Ω) 1.0 100 10 IR=1mA 0.5 TA=-40°C TA=25°C TA=85°C 0 0.1 1 10 IR=5mA 1 0.1 0.01 0.1 1 10 100 Reference Current (mA) Frequency (kHz) Slope Resistance v Current Slope Resistance v Frequency 3.0 3.0 VR - (V) INPUT 50K OUTPUT VR - (V) 2.0 1.0 0 10 2.0 1.0 0 10 INPUT 1K5 OUTPUT VIN - (V) VIN - (V) 0 0 1 2 3 4 0 0 0.1 0.2 0.3 0.4 Time (µs) Time (µs) µ Transient Response (IR=150µA) Transient Response (IR=5mA) 4-234 ZRA250 CONNECTION DIAGRAMS E-Line, 2 pin Package Suffix – Y E-Line, 3 pin,Rev Package Suffix – R Bottom View Bottom View – Pin 3 floating or connected to pin 1 E-Line, 3 pin Package Suffix – A SO8 Package Suffix – N8 Bottom View – Pin 1 floating or connected to pin 3 Top View SOT23 Package Suffix – F Top View – Pin 1 floating or connected to pin 2 4-235 ZRA250 ORDERING INFORMATION Part No ZRA250A03 ZRA250A02 ZRA250A01 ZRA250A005 ZRA250F03 ZRA250F02 ZRA250F01 ZRA250F005 ZRA250N803 ZRA250N802 ZRA250N801 Tol% Package 3 2 1 0.5 3 2 1 0.5 3 2 1 E-Line • E-Line • E-Line • E-Line • SOT23 SOT23 SOT23 SOT23 SO8 SO8 SO8 SO8 Partmark ZRA25003 ZRA25002 ZRA25001 ZRA250005 25A 25B 25C 25Y ZRA25003 ZRA25002 ZRA25001 ZRA250005 Part No ZRA250R03 ZRA250R02 ZRA250R01 ZRA250R005 ZRA250Y03 ZRA250Y02 ZRA250Y01 ZRA250Y005 Tol% Package 3 2 1 0.5 3 2 1 0.5 E-Line * E-Line * E-Line * E-Line * E-Line † E-Line † E-Line † E-Line † Partmark ZRA250R3 ZRA250R2 ZRA250R1 ZRA250R05 ZRA25003 ZRA25002 ZRA25001 ZRA250005 * E-Line 3 pin Reversed † E-Line 2 pin • E-Line 3 pin ZRA250N8005 0.5 Note: 3%, 2% and 1% tolerance devices are not recommended for new designs. Refer to ZRC250 4-236