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| PRECISION 4.0 VOLT MICROPOWER VOLTAGE REFERENCE ISSUE 1 - JANUARY 1996 ZRA400 * * * * * * * * * * * * * No stabilising capacitor required Typical TC 15ppm/C Typical slope resistance 0.55 3%, 2% and 1% tolerance Industrial temperature range Operating current 50A to 5mA Battery powered and portable equipment. Metering and measurement systems. Instrumentation. Test equipment. Data acquisition systems. Precision power supplies. Crystal oscillators DEVICE DESCRIPTION The ZRA400 uses a bandgap circuit design to achieve a precision micropower voltage reference of 4.096 volts. The device is available in small outline surface mount packages, ideal for applications where space saving is important. The ZRA400 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZRA400 is recommended for operation between 50A and 5mA and so is ideally suited to low power and battery powered applications. Excellent performance is maintained to a suggested 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. APPLICATIONS FEATURES * Small outline SO8, SOT23 and TO92 style packages. SCHEMATIC DIAGRAM V R G nd 1 - 33 ZRA400 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 4.05 4.01 3.97 0.05 15 LIMITS TYP MAX 1 2 3 V TOL. % UNITS 4.096 4.14 4.096 4.18 4.096 4.22 25 50 5 50 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 IR(min) to IR(max) A mA ppm/C RS ZR 0.55 0.5 2 1.2 Reverse Current (A) TC = VR Change x 1000000 VR x Temperature Change 50 40 30 20 10 0 T)=85C T)=25C T)=-40C RS = VR Change (IR (min) to IR (max)) IR (max) - IR (min) 0 2.0 4.0 Reverse Voltage (V) Reverse Characteristics 1 - 34 ZRA400 TYPICAL CHARACTERISTICS 1.6 4.10 IR=150A to 5mA 1.2 1.0 Reference voltage (V) Forward Voltage (V) 1.4 4.08 0.8 0.6 4.06 0.4 0.1 1 10 100 1000 -40 -20 0 20 40 60 80 Forward Current (mA) Temperature (C) Forward Characteristics Temperature Drift 4.0 1000 Slope resistance () Slope resistance () I4=150A 100 I4=1mA 2.0 TA=-40C 10 I4=5mA 1 TA=25C TA=85C 0 0.1 1 10 0.1 0.01 0.1 1 10 100 Reference Current (mA) Frequency (kHz) Slope Resistance v Current Slope Resistance v Frequency 4.0 VR - (V) 5mA 150 A 4.0 VR - (V) 5mA 150 A INPUT 40K 1K2 150A 5mA OUTPUT 2.0 INPUT 40K 1K2 150A 5mA OUTPUT 2.0 - (V) 0 0 - (V) 0 1000 2000 10 10 VI N VI 0 N 0 0 1 2 3 4 Time (s) Time (s) Transient Response (Single Pulse) Transient Response (Repetitive Pulse) 1 - 35 ZRA400 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 ZRA400 ORDERING INFORMATION Part No ZRA400A03 ZRA400A02 ZRA400A01 ZRA400F03 ZRA400F02 ZRA400F01 ZRA400N803 ZRA400N802 ZRA400N801 Tol% Package 3 2 1 3 2 1 3 2 1 E-Line * E-Line * E-Line * SOT23 SOT23 SOT23 SO8 SO8 SO8 Partmark ZRA40003 ZRA40002 ZRA40001 40A 40B 40C ZRA40003 ZRA40002 ZRA40001 Part No ZRA400R03 ZRA400R02 ZRA400R01 ZRA400Y03 ZRA400Y02 ZRA400Y01 Tol% Package 3 2 1 3 2 1 E-Line * E-Line * E-Line * E-Line E-Line E-Line Partmark ZRA400R3 ZRA400R2 ZRA400R1 ZRA40003 ZRA40002 ZRA40001 * E-Line 3 pin Reversed E-Line 2 pin * E-Line 3 pin |
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