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| PRECISION 2.5 VOLT LOW KNEE CURRENT VOLTAGE REFERENCE ISSUE 3 - MARCH 1998 DEVICE DESCRIPTION The ZRC250 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 ZRC250 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZRC250 is recommended for operation between 20A 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 ZRC250 * * * * * * * * * * * * * * Small outline SOT23 and SO8 packages TO92 style packages No stabilising capacitor required Low knee current, 15A typical Typical TC 30ppm/C Typical slope resistance 0.4 3, 2 and 1% tolerance Industrial temperature range Operating current 20A to 5mA Transient response, stable in less than 10s Optional extended current range APPLICATIONS Battery powered and portable equipment. Instrumentation. Test equipment. SCHEMATIC DIAGRAM V R G nd 4-247 ZRC250 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 E-line, 3 pin (TO92) 500mW E-line, 2 pin (TO92) 500mW SO8 625mW ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25C SYMBOL PARAMETER CONDITIONS MIN VR Reverse Breakdown Voltage IR=150A LIMITS TYP MAX 2.525 2.55 2.575 20 5 30 IR(min) to IR(max) 0.4 IR = 1mA f = 100Hz IAC= 0.1 IR IR = 150A f = 10Hz to 10kHz 40 TOL% UNITS 2.475 2.5 2.45 2.5 2.425 2.5 13 0.02 1 2 3 V IMIN IR TC Minimum Operating Current Recommended Operating Current Average Reverse Breakdown Voltage Temp. Co. Slope Resistance Reverse Dynamic Impedance A mA ppm/C 90 RS ZR 1 0.8 0.3 EN Wideband Noise Voltage 60 V(rms) TC = (VR(max)-VR(min)) x 1000000 VR x (T(max)-T(min)) Reverse Current (A) 30 Note: VR(max) - VR(min) is the maximum deviation in reference voltage measured over the full operating temperature range. 20 RS = VR Change(IR (min) to IR (max)) IR (max) - IR (min) 10 TA=25C 0 0 1.0 2.0 3.0 Reverse Voltage (V) Reverse Characteristics 4-248 ZRC250 TYPICAL CHARACTERISTICS 1.4 2.51 1.2 IR=150A to 5mA Reference voltage (V) 1 10 100 2.50 Forward Voltage (V) 1.0 0.8 2.49 0.6 0.4 2.48 0.2 2.47 0.001 0.01 0.1 -40 -20 0 20 40 60 80 Forward Current (mA) Temperature (C) Forward Characteristics 1000 1.4 1.2 Temperature Drift Slope resistance () 1.0 0.8 Slope resistance () 85C 25C -40C IR=150A 100 10 0.6 IR=5mA 1 0.4 0.2 IR=1mA 0.1 1 10 100 10 100 1K 10K 100K Reference Current (mA) Frequency (kHz) Slope Resistance v Current Slope Resistance v Frequency 10 VIN (V) 0 VIN (V) 10 0 IR=5mA 3 IR=5mA 2 IR=150A 1 VR (V) 2 0 VR (V) 1 IR=150A 0 0 4 8 12 16 0 4 8 12 16 Time (s) Time (s) Transient Response - Single pulse Transient Response - Repetitive Test 4-249 ZRC250 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 4-250 ZRC250 ORDERING INFORMATION Part No Tol% Package E-Line * E-Line * E-Line * SOT23 SOT23 SOT23 SO8 SO8 SO8 Partmark Part No Tol% Package Partmark ZRC250A03 ZRC250A02 ZRC250A01 ZRC250F03 ZRC250F02 ZRC250F01 3 2 1 3 2 1 ZRC25003 ZRC25002 ZRC25001 25G 25H 25J ZRC25003 ZRC25002 ZRC25001 ZRC250R03 ZRC250R02 ZRC250R01 ZRC250Y03 ZRC250Y02 ZRC250Y01 3 2 1 3 2 1 E-Line * E-Line * E-Line * E-Line E-Line E-Line ZRC250R3 ZRC250R2 ZRC250R1 ZRC25003 ZRC25002 ZRC25001 ZRC250N803 3 ZRC250N802 2 ZRC250N801 1 * E-Line 3 pin Reversed E-Line 2 pin * E-Line 3 pin 4-251 |
Price & Availability of ZRC250
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