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| PRECISION 1.25 VOLT MICROPOWER VOLTAGE REFERENCE ZRA125 ISSUE 2 - FEBRUARY 1997 DEVICE DESCRIPTION Typical TC 30ppm/C Typical slope resistance 0.65 3%,2% and 1% tolerance Industrial temperature range Operating current 50A to 5mA Transient response, stable in less than 10s Optional extended current range Battery powered and portable equipment. Metering and measurement systems. Instrumentation. Data acquisition systems. Precision power supplies. Test equipment. The ZRA125 uses a bandgap circuit design to achieve a precision micropower voltage reference of 1.25 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. * * * * * * * APPLICATIONS The ZRA125 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZRA125 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. * * * * * * FEATURES * * Small outline SOT23, SO8 and TO92 style packages No stabilising capacitor required SCHEMATIC DIAGRAM V R G nd 1 - 24 ZRA125 TYPICAL CHARACTERISTICS 1.4 1.26 1.27 IR=150A to 5mA ZRA125 ABSOLUTE MAXIMUM RATING Reverse Current Forward Current Operating Temperature Storage Temperature 1.2 1.25 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 1.0 1.24 ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25C 0.8 1.23 SYMBOL PARAMETER 0.6 1.22 0.4 Forward Voltage (V) Reference voltage (V) 1.21 0.1 1 10 100 1000 -40 -20 CONDITIONS TYP MAX 0.2 LIMITS TOL. % UNITS MIN V Forward Current (mA) VR Reverse Breakdown Voltage IR=150A Forward Characteristics 0 20 40 60 80 1.228 1.225 1.21 30 5 30 1.0 1.24 1.252 1.25 1.275 1.25 1.29 50 mA A 1 2 3 Temperature (C) IMIN Minimum Operating Current Temperature Drift 1000 IR 90 ppm/C Recommended Operating Current 0.05 TC 100 Average Reverse Breakdown Voltage Temp. Co. 0.65 2 0.5 IR(min) to IR(max) TA=-40C I4=150A 10 TA=25C RS 0.5 1 Slope Resistance I4=1mA Slope resistance () Reverse Dynamic Impedance IR = 1mA f = 100Hz IAC= 0.1 IR 40 V(rms) 0 0.1 Slope resistance () ZR TA=85C 1 I4=5mA 0.1 0.01 1 10 0.1 1 10 100 EN Wideband Noise Voltage IR = 150A f = 100Hz to 10kHZ Reference Current (mA) Frequency (kHz) Slope Resistance v Current Slope Resistance v Frequency 1.5 1.5 60 1.0 VR Change x 1000000 VR x Temperature Change C 5 )= T 2 0 -4 C 5 C 40 0.5 58K VR - (V) INPUT O UTPUT 0 TC = VR - (V) 50 1.0 INPUT 0.5 1 K8 O UTPUT 0 30 Reverse Current (A) VR Change (IR (min) to IR (max)) RS = IR (max) - IR (min) =8 T) T - (V) 10 VI 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0 1 2 3 4 VI )= N 0 - (V) N 20 10 10 0 0 2 4 6 8 Reverse Voltage (V) Time (s) Time (s) Reverse Characteristics Transient Response (I4=150A) Transient Response (I4=5mA) 1 - 45 1 - 26 ZRA125 TYPICAL CHARACTERISTICS 1.4 1.26 1.27 IR=150A to 5mA ZRA125 ABSOLUTE MAXIMUM RATING Reverse Current Forward Current Operating Temperature Storage Temperature 1.2 1.25 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 1.0 1.24 ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25C 0.8 1.23 SYMBOL PARAMETER 0.6 1.22 0.4 Forward Voltage (V) Reference voltage (V) 1.21 0.1 1 10 100 1000 -40 -20 CONDITIONS TYP MAX 0.2 LIMITS TOL. % UNITS MIN V Forward Current (mA) VR Reverse Breakdown Voltage IR=150A Forward Characteristics 0 20 40 60 80 1.228 1.225 1.21 30 5 30 1.0 1.24 1.252 1.25 1.275 1.25 1.29 50 mA A 1 2 3 Temperature (C) IMIN Minimum Operating Current Temperature Drift 1000 IR 90 ppm/C Recommended Operating Current 0.05 TC 100 Average Reverse Breakdown Voltage Temp. Co. 0.65 2 0.5 IR(min) to IR(max) TA=-40C I4=150A 10 TA=25C RS 0.5 1 Slope Resistance I4=1mA Slope resistance () Reverse Dynamic Impedance IR = 1mA f = 100Hz IAC= 0.1 IR 40 V(rms) 0 0.1 Slope resistance () ZR TA=85C 1 I4=5mA 0.1 0.01 1 10 0.1 1 10 100 EN Wideband Noise Voltage IR = 150A f = 100Hz to 10kHZ Reference Current (mA) Frequency (kHz) Slope Resistance v Current Slope Resistance v Frequency 1.5 1.5 60 1.0 VR Change x 1000000 VR x Temperature Change C 5 )= T 2 0 -4 C 5 C 40 0.5 58K VR - (V) INPUT O UTPUT 0 TC = VR - (V) 50 1.0 INPUT 0.5 1 K8 O UTPUT 0 30 Reverse Current (A) VR Change (IR (min) to IR (max)) RS = IR (max) - IR (min) =8 T) T - (V) 10 VI 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0 1 2 3 4 VI )= N 0 - (V) N 20 10 10 0 0 2 4 6 8 Reverse Voltage (V) Time (s) Time (s) Reverse Characteristics Transient Response (I4=150A) Transient Response (I4=5mA) 1 - 45 1 - 26 ZRA125 ORDERING INFORMATION Part No ZRA125A03 ZRA125A02 ZRA125A01 ZRA125F03 ZRA125F02 ZRA125F01 ZRA125N803 ZRA125N802 ZRA125N801 1 SO8 2 SO8 3 SO8 ZRA12503 ZRA12502 ZRA12501 1 SOT23 12D 2 SOT23 12B 3 SOT23 12A ZRA125Y03 ZRA125Y02 ZRA125Y01 1 E-Line * ZRA12501 ZRA125R01 1 3 2 1 2 E-Line * ZRA12502 ZRA125R02 2 3 E-Line * ZRA12503 ZRA125R03 3 Tol% Package Partmark Part No Tol% Package E-Line * E-Line * E-Line * E-Line E-Line E-Line * E-Line 3 pin Reversed E-Line 2 pin * E-Line 3 pin Partmark ZRA125 CONNECTION DIAGRAMS E-Line, 2 pin Package Suffix Y E-Line, 3 pin,Rev Package Suffix R ZRA125R3 ZRA125R2 ZRA125R1 ZRA12503 ZRA12502 ZRA12501 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 ZRA125 ORDERING INFORMATION Part No ZRA125A03 ZRA125A02 ZRA125A01 ZRA125F03 ZRA125F02 ZRA125F01 ZRA125N803 ZRA125N802 ZRA125N801 1 SO8 2 SO8 3 SO8 ZRA12503 ZRA12502 ZRA12501 1 SOT23 12D 2 SOT23 12B 3 SOT23 12A ZRA125Y03 ZRA125Y02 ZRA125Y01 1 E-Line * ZRA12501 ZRA125R01 1 3 2 1 2 E-Line * ZRA12502 ZRA125R02 2 3 E-Line * ZRA12503 ZRA125R03 3 Tol% Package Partmark Part No Tol% Package E-Line * E-Line * E-Line * E-Line E-Line E-Line * E-Line 3 pin Reversed E-Line 2 pin * E-Line 3 pin Partmark ZRA125 CONNECTION DIAGRAMS E-Line, 2 pin Package Suffix Y E-Line, 3 pin,Rev Package Suffix R ZRA125R3 ZRA125R2 ZRA125R1 ZRA12503 ZRA12502 ZRA12501 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 |
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