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| PRECISION 2.5 VOLT MICROPOWER VOLTAGE REFERENCE ISSUE 3 - MARCH 1998 ZR4040-2.5 DEVICE DESCRIPTION The ZR4040-2.5 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, as well as packages for through hole requirements. The ZR4040-2.5 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZR4040-2.5 is recommended for operation between 60A and 15mA and so is ideally suited to l o w po w er an d ba tt e ry p owe re d 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 SO8 and SOT23 packages TO92 style package No stabilising capacitor required Typical TC 30ppm/C Typical slope resistance 0.4 2% 1% and 0.5 % tolerance Industrial temperature range Operating current 60A to 15mA Transient response, stable in less than 10s APPLICATIONS Battery powered and portable equipment. Metering and measurement systems. Instrumentation. Test equipment. Data acquisition systems. Precision power supplies. SCHEMETIC DIAGRAM V R G nd 4-173 ZR4040-2.5 ABSOLUTE MAXIMUM RATING Reverse Current Forward Current Operating Temperature Storage Temperature 25mA 25mA -40 to 85C -55 to 125C Power Dissipation (Tamb=25C) SOT23 330mW SO8 625mW E-Line, 3 pin (TO92) 500mW ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25C SYMBOL PARAMETER CONDITIONS MIN VR Reverse Breakdown Voltage IR=150A LIMITS TYP MAX 2.5125 0.5 2.525 1 2.55 2 60 15 30 IR(min) to IR(max) 0.4 0.3 2 0.8 100 V TOL. % UNITS 2.4875 2.5 2.475 2.5 2.45 2.5 25 0.06 IMIN IR TC Minimum Operating Current Recommended Operating Current Average Reverse Breakdown Voltage Temp. Co. Slope Resistance Reverse Dynamic Impedance IR = 1mA f = 100Hz IAC= 0.1 IR Wideband Noise Voltage IR = 1mA f = 10Hz to 10kHz A mA ppm/C RS ZR EN 45 V (rms) TC = (VR(max)-VR(min)) x 1000000 Reverse Current (A) 60 50 40 30 20 10 0 0.2 0.6 1.0 1.4 1.8 2.2 2.6 VR x (T(max)-T(min)) Note: VR(max) - VR(min) is the maximum deviation in reference voltage measured over the full operating temperature range. VR Change(IR (min) to IR (max)) RS = IR (max) - IR (min) 5C =8 TA 5C C =2 TA -40 = TA Reverse Voltage (V) Reverse Characteristics 4-174 ZR4040-2.5 TYPICAL CHARACTERISTICS 1.4 2.53 IR =150A 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=150A Slope resistance () Slope resistance () 1.0 100 10 IR=1mA 0.5 TA=-40C TA=25C TA=85C 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 2.0 INPUT 1K5 OUTPUT 1.0 1.0 0 10 0 10 VIN - (V) VIN - (V) 0 0 1 2 3 4 0 0 0.1 0.2 0.3 0.4 Time (s) Time (s) Transient Response (IR=150A) Transient Response (IR=5mA) 4-175 ZR4040-2.5 CONNECTION DIAGRAMS SO8 Package Suffix - N8 SOT23 Package Suffix - F Top View Top View - Pin 1 floating or connected to pin 2 E-Line, 3 pin, Rev Package Suffix - R Bottom View - Pin 3 floating or connected to pin 1 ORDERING INFORMATION Part Number ZR40402F25 ZR40401F25 ZR404005F25 ZR40402N825 ZR40401N825 ZR40402R25 ZR40401R25 ZR404005R25 Tol% 2 1 0.5 2 1 2 1 0.5 Package SOT23 SOT23 SOT23 SO8 SO8 SO8 Partmark 25L 25M 25V ZR4040225 ZR4040125 ZR4040525 ZR404005N825 0.5 E-Line * ZR4040225 E-Line * ZR4040125 E-Line * ZR4040525 * E-Line, 3 pin Reversed 4-176 |
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