12D

PRECISION 1.25 VOLT MICROPOWER VOLTAGE REFERENCE ISSUE 2 - FEBRUARY 1997 DEVICE DESCRIPTION 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. The ZRA125 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZRA125 is recommended for operation between 50µA 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. ZRA125 • • • • • • • • • • • • • Typical TC 30ppm/°C Typical slope resistance 0.65Ω ± 3%,2% and 1% tolerance Industrial temperature range Operating current 50µA to 5mA Transient response, stable in less than 10µs Optional extended current range Battery powered and portable equipment. Metering and measurement systems. Instrumentation. Data acquisition systems. Precision power supplies. Test equipment. APPLICATIONS FEATURES • • Small outline SOT23, SO8 and TO92 style packages No stabilising capacitor required SCHEMATIC DIAGRAM V R G nd 1 - 24 ZRA125 ABSOLUTE MAXIMUM RATING Reverse Current Forward Current Operating Temperature Storage Temperature 25mA 25mA -40 to 85°C -55 to 125°C Power Dissipation (Tamb=25°C) SOT23 330mW E-Line, 3 pin (TO92) 500mW E-Line, 2 pin (TO92) 500mW SO8 625mW Forward Voltage (V) ZRA125 TYPICAL CHARACTERISTICS 1.4 1.27 IR=150µA to 5mA ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25°C SYMBOL PARAMETER CONDITIONS MIN VR Reverse Breakdown Voltage IR=150µA 1.228 1.225 1.21 0.05 30 LIMITS TYP MAX 1.24 1.252 1.25 1.275 1.25 1.29 30 50 5 90 1 2 3 V TOL. % UNITS Reference voltage (V) 1.2 1.26 1.0 1.25 0.8 1.24 0.6 1.23 1.22 0.4 0.2 0.1 1 10 100 1000 1.21 -40 -20 0 20 40 60 80 Forward Current (mA) Temperature (°C) 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 = 150µA f = 100Hz to 10kHZ IR(min) to IR(max) µA mA Forward Characteristics Temperature Drift 1000 ppm/°C Slope resistance (Ω) 1.0 100 Slope resistance (Ω) TA=-40°C TA=25°C I4=150µA 10 RS § ZR 0.65 2 0.5 1 Ω Ω I4=1mA 0.5 TA =85°C 1 I4=5mA EN 40 0.1 0 0.01 0.1 1 10 0.1 1 10 100 µV(rms) Reference Current (mA) Frequency (kHz) Slope Resistance v Current Slope Resistance v Frequency 1.5 60 1.5 V - (V) Reverse Current (µA) † TC = VR Change x 1000000 VR x Temperature Change 1.0 V - (V) 50 R INPUT 58K O UTPUT 1.0 R INPUT 1 K8 O UTPUT 40 0.5 0.5 30 10 T )= 2 5 V 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0 1 2 3 4 V T )= 0 -4 °C NI 0 - (V) NI °C - (V) § VR Change (IR (min) to IR (max)) RS = IR (max) − IR (min) 20 =8 T) C 5° 0 10 0 10 0 0 2 4 6 8 Reverse Voltage (V) Time (µs) Time (µs) Reverse Characteristics Transient Response (I4=150µA) Transient Response (I4=5mA) 1 - 45 1 - 26 ZRA125 ABSOLUTE MAXIMUM RATING Reverse Current Forward Current Operating Temperature Storage Temperature 25mA 25mA -40 to 85°C -55 to 125°C Power Dissipation (Tamb=25°C) SOT23 330mW E-Line, 3 pin (TO92) 500mW E-Line, 2 pin (TO92) 500mW SO8 625mW Forward Voltage (V) ZRA125 TYPICAL CHARACTERISTICS 1.4 1.27 IR=150µA to 5mA ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25°C SYMBOL PARAMETER CONDITIONS MIN VR Reverse Breakdown Voltage IR=150µA 1.228 1.225 1.21 0.05 30 LIMITS TYP MAX 1.24 1.252 1.25 1.275 1.25 1.29 30 50 5 90 1 2 3 V TOL. % UNITS Reference voltage (V) 1.2 1.26 1.0 1.25 0.8 1.24 0.6 1.23 1.22 0.4 0.2 0.1 1 10 100 1000 1.21 -40 -20 0 20 40 60 80 Forward Current (mA) Temperature (°C) 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 = 150µA f = 100Hz to 10kHZ IR(min) to IR(max) µA mA Forward Characteristics Temperature Drift 1000 ppm/°C Slope resistance (Ω) 1.0 100 Slope resistance (Ω) TA=-40°C TA=25°C I4=150µA 10 RS § ZR 0.65 2 0.5 1 Ω Ω I4=1mA 0.5 TA =85°C 1 I4=5mA EN 40 0.1 0 0.01 0.1 1 10 0.1 1 10 100 µV(rms) Reference Current (mA) Frequency (kHz) Slope Resistance v Current Slope Resistance v Frequency 1.5 60 1.5 V - (V) Reverse Current (µA) † TC = VR Change x 1000000 VR x Temperature Change 1.0 V - (V) 50 R INPUT 58K O UTPUT 1.0 R INPUT 1 K8 O UTPUT 40 0.5 0.5 30 10 T )= 2 5 V 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0 1 2 3 4 V T )= 0 -4 °C NI 0 - (V) NI °C - (V) § VR Change (IR (min) to IR (max)) RS = IR (max) − IR (min) 20 =8 T) C 5° 0 10 0 10 0 0 2 4 6 8 Reverse Voltage (V) Time (µs) Time (µs) Reverse Characteristics Transient Response (I4=150µA) Transient Response (I4=5mA) 1 - 45 1 - 26 ZRA125 CONNECTION DIAGRAMS E-Line, 2 pin Package Suffix – Y E-Line, 3 pin,Rev Package Suffix – R Part No ZRA125A03 ZRA125A02 ZRA125A01 Bottom View Bottom View – Pin 3 floating or connected to pin 1 ZRA125F03 ZRA125F02 ZRA125F01 Tol% Package 3 2 1 3 2 1 3 2 1 E-Line • E-Line • E-Line • SOT23 SOT23 SOT23 SO8 SO8 SO8 Partmark ZRA12503 ZRA12502 ZRA12501 12A 12B 12D ZRA12503 ZRA12502 ZRA12501 ZRA125 ORDERING INFORMATION Part No ZRA125R03 ZRA125R02 ZRA125R01 ZRA125Y03 ZRA125Y02 ZRA125Y01 Tol% Package 3 2 1 3 2 1 E-Line * E-Line * E-Line * E-Line † E-Line † E-Line † Partmark ZRA125R3 ZRA125R2 ZRA125R1 ZRA12503 ZRA12502 ZRA12501 E-Line, 3 pin Package Suffix – A SO8 Package Suffix – N8 ZRA125N803 ZRA125N802 ZRA125N801 * E-Line 3 pin Reversed † E-Line 2 pin • E-Line 3 pin 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 CONNECTION DIAGRAMS E-Line, 2 pin Package Suffix – Y E-Line, 3 pin,Rev Package Suffix – R Part No ZRA125A03 ZRA125A02 ZRA125A01 Bottom View Bottom View – Pin 3 floating or connected to pin 1 ZRA125F03 ZRA125F02 ZRA125F01 Tol% Package 3 2 1 3 2 1 3 2 1 E-Line • E-Line • E-Line • SOT23 SOT23 SOT23 SO8 SO8 SO8 Partmark ZRA12503 ZRA12502 ZRA12501 12A 12B 12D ZRA12503 ZRA12502 ZRA12501 ZRA125 ORDERING INFORMATION Part No ZRA125R03 ZRA125R02 ZRA125R01 ZRA125Y03 ZRA125Y02 ZRA125Y01 Tol% Package 3 2 1 3 2 1 E-Line * E-Line * E-Line * E-Line † E-Line † E-Line † Partmark ZRA125R3 ZRA125R2 ZRA125R1 ZRA12503 ZRA12502 ZRA12501 E-Line, 3 pin Package Suffix – A SO8 Package Suffix – N8 ZRA125N803 ZRA125N802 ZRA125N801 * E-Line 3 pin Reversed † E-Line 2 pin • E-Line 3 pin 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