PRECISION 2.5 VOLT MICROPOWER VOLTAGE REFERENCE ZR4040-2.5 ISSUE 3 - MARCH 1998 DEVICE DESCRIPTION FEATURES • • • • • • • • • 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 60µA 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. Small outline SO8 and SOT23 packages TO92 style package No stabilising capacitor required Typical TC 30ppm/°C Typical slope resistance 0.4Ω 2% 1% and 0.5 % tolerance Industrial temperature range Operating current 60µA to 15mA Transient response, stable in less than 10µs 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. • • • • • SCHEMETIC DIAGRAM V R G nd 4-173 Battery powered and portable equipment. Metering and measurement systems. Instrumentation. Test equipment. Data acquisition systems. Precision power supplies. ZR4040-2.5 ABSOLUTE MAXIMUM RATING Reverse Current Forward Current Operating Temperature Storage Temperature Power Dissipation (Tamb=25°C) SOT23 330mW SO8 625mW E-Line, 3 pin (TO92) 500mW 25mA 25mA -40 to 85°C -55 to 125°C ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25°C SYMBOL PARAMETER CONDITIONS LIMITS MIN VR Reverse Breakdown Voltage IMIN Minimum Operating Current IR Recommended Operating Current TC † Average Reverse Breakdown Voltage Temp. Co. IR=150µA TYP TOL. % UNITS MAX 2.4875 2.5 2.475 2.5 2.45 2.5 2.5125 0.5 2.525 1 2.55 2 V 60 µA 15 mA 30 100 ppm/°C 25 0.06 IR(min) to IR(max) RS § Slope Resistance 0.4 2 Ω ZR Reverse Dynamic Impedance IR = 1mA f = 100Hz IAC= 0.1 IR 0.3 0.8 Ω EN Wideband Noise Voltage 45 TC = (VR(max)−VR(min)) x 1000000 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) µV (rms) 60 Reverse Current (µA) † IR = 1mA f = 10Hz to 10kHz 50 40 30 5°C =8 TA 5°C C =2 TA -40° = TA 20 10 0 0.2 0.6 1.0 1.4 1.8 2.2 Reverse Voltage (V) Reverse Characteristics 4-174 2.6 ZR4040-2.5 1.4 2.53 1.2 2.52 IR =150µA to 5mA Reference voltage (V) Forward Voltage (V) TYPICAL CHARACTERISTICS 1.0 0.8 0.6 0.4 0.2 2.51 2.50 2.49 2.48 2.47 0.1 1 10 100 1000 -40 -20 Forward Current (mA) 0 20 40 60 80 Temperature (°C) Forward Characteristics Temperature Drift 1000 Slope resistance (Ω) Slope resistance (Ω) IR=150µA 1.0 0.5 TA=-40°C TA=25°C 100 IR=1mA 10 IR=5mA 1 TA=85°C 0.1 0 0.1 1 0.01 10 0.1 100 3.0 2.0 VR - (V) 3.0 INPUT 50K 1.0 OUTPUT 2.0 INPUT OUTPUT 0 10 10 0 0 1 2 3 1K5 1.0 0 VIN - (V) VR - (V) 10 Slope Resistance v Frequency Slope Resistance v Current VIN - (V) 1 Frequency (kHz) Reference Current (mA) 0 0 4 Time (µs) 0.1 0.2 0.3 Time (µs) Transient Response (IR=150µ µA) Transient Response (IR=5mA) 4-175 0.4 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 Tol% Package Partmark ZR40402F25 2 SOT23 25L ZR40401F25 1 SOT23 25M ZR404005F25 0.5 SOT23 25V ZR40402N825 2 SO8 ZR4040225 ZR40401N825 1 SO8 ZR4040125 ZR404005N825 0.5 SO8 ZR4040525 ZR40402R25 E-Line * ZR4040225 2 ZR40401R25 1 E-Line * ZR4040125 ZR404005R25 0.5 E-Line * ZR4040525 * E-Line, 3 pin Reversed 4-176