PRECISION 1.25 VOLT MICROPOWER VOLTAGE REFERENCE ZRA125 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. • • • • • • FEATURES • 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 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. • Typical TC 30ppm/°C Small outline SOT23, SO8 and TO92 style packages No stabilising capacitor required SCHEMATIC DIAGRAM V R G nd 1 - 24 Battery powered and portable equipment. Metering and measurement systems. Instrumentation. Data acquisition systems. Precision power supplies. Test equipment. ZRA125 ZRA125 ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25°C CONDITIONS Reverse Breakdown Voltage IR=150µA IMIN Minimum Operating Current IR Recommended Operating Current TC Average Reverse Breakdown Voltage Temp. Co. TOL. % MIN TYP MAX 1.228 1.225 1.21 1.24 1.252 1.25 1.275 1.25 1.29 30 0.05 UNITS 1.4 1.27 1.2 1.26 1.0 0.8 0.6 0.4 V IR=150µA to 5mA 1.25 1.24 1.23 1.22 1.21 0.2 1 2 3 0.1 1 10 100 -40 1000 -20 0 50 µA 5 mA 20 40 60 80 Temperature (°C) Forward Current (mA) Forward Characteristics Temperature Drift 1000 30 IR(min) to IR(max) 90 ppm/°C RS § Slope Resistance 0.65 2 Ω ZR Reverse Dynamic Impedance IR = 1mA f = 100Hz IAC= 0.1 IR 0.5 Ω EN Wideband Noise Voltage 40 IR = 150µA f = 100Hz to 10kHZ 1 1.0 100 Slope resistance (Ω) VR LIMITS Slope resistance (Ω) SYMBOL PARAMETER TYPICAL CHARACTERISTICS Power Dissipation (Tamb=25°C) SOT23 330mW E-Line, 3 pin (TO92) 500mW E-Line, 2 pin (TO92) 500mW SO8 625mW 25mA 25mA -40 to 85°C -55 to 125°C Forward Voltage (V) Reverse Current Forward Current Operating Temperature Storage Temperature Reference voltage (V) ABSOLUTE MAXIMUM RATING TA=-40°C TA=25°C 0.5 TA =85°C IR=150µA 10 IR=1mA IR=5mA 1 0.1 0.01 0 0.1 µV(rms) 1 0.1 10 1 10 100 Frequency (kHz) Reference Current (mA) Slope Resistance v Current Slope Resistance v Frequency 1.5 1.5 INPUT 58K 0.5 40 V - (V) V - (V) 1.0 R 1.0 INPUT R 1 K8 O UTPUT 0.5 O UTPUT 30 C 5° A= 2 5 °C T 10 A= 0 -4 °C NI T 0 0 10 10 - (V) =8 TA 20 NI 0 V VR Change (IR (min) to IR (max)) RS = IR (max) − IR (min) 50 - (V) § VR Change x 1000000 VR x Temperature Change V TC = Reverse Current (µA) 60 0 0 0 0.2 0.4 0.6 0.8 1.0 1.2 Reverse Voltage (V) Reverse Characteristics 1 - 45 1.4 0 1 2 3 4 0 Time (µs) 2 4 6 Time (µs) Transient Response (IR=5mA) µA) Transient Response (IR=150µ 1 - 26 8 ZRA125 ZRA125 ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25°C CONDITIONS Reverse Breakdown Voltage IR=150µA IMIN Minimum Operating Current IR Recommended Operating Current TC Average Reverse Breakdown Voltage Temp. Co. TOL. % MIN TYP MAX 1.228 1.225 1.21 1.24 1.252 1.25 1.275 1.25 1.29 30 0.05 UNITS 1.4 1.27 1.2 1.26 1.0 0.8 0.6 0.4 V IR=150µA to 5mA 1.25 1.24 1.23 1.22 1.21 0.2 1 2 3 0.1 1 10 100 -40 1000 -20 0 50 µA 5 mA 20 40 60 80 Temperature (°C) Forward Current (mA) Forward Characteristics Temperature Drift 1000 30 IR(min) to IR(max) 90 ppm/°C RS § Slope Resistance 0.65 2 Ω ZR Reverse Dynamic Impedance IR = 1mA f = 100Hz IAC= 0.1 IR 0.5 Ω EN Wideband Noise Voltage 40 IR = 150µA f = 100Hz to 10kHZ 1 1.0 100 Slope resistance (Ω) VR LIMITS Slope resistance (Ω) SYMBOL PARAMETER TYPICAL CHARACTERISTICS Power Dissipation (Tamb=25°C) SOT23 330mW E-Line, 3 pin (TO92) 500mW E-Line, 2 pin (TO92) 500mW SO8 625mW 25mA 25mA -40 to 85°C -55 to 125°C Forward Voltage (V) Reverse Current Forward Current Operating Temperature Storage Temperature Reference voltage (V) ABSOLUTE MAXIMUM RATING TA=-40°C TA=25°C 0.5 TA =85°C IR=150µA 10 IR=1mA IR=5mA 1 0.1 0.01 0 0.1 µV(rms) 1 0.1 10 1 10 100 Frequency (kHz) Reference Current (mA) Slope Resistance v Current Slope Resistance v Frequency 1.5 1.5 INPUT 58K 0.5 40 V - (V) V - (V) 1.0 R 1.0 INPUT R 1 K8 O UTPUT 0.5 O UTPUT 30 C 5° A= 2 5 °C T 10 A= 0 -4 °C NI T 0 0 10 10 - (V) =8 TA 20 NI 0 V VR Change (IR (min) to IR (max)) RS = IR (max) − IR (min) 50 - (V) § VR Change x 1000000 VR x Temperature Change V TC = Reverse Current (µA) 60 0 0 0 0.2 0.4 0.6 0.8 1.0 1.2 Reverse Voltage (V) Reverse Characteristics 1 - 45 1.4 0 1 2 3 4 0 Time (µs) 2 4 6 Time (µs) Transient Response (IR=5mA) µA) Transient Response (IR=150µ 1 - 26 8 ZRA125 ZRA125 CONNECTION DIAGRAMS E-Line, 2 pin Package Suffix Y Bottom View E-Line, 3 pin Package Suffix A Bottom View Pin 1 floating or connected to pin 3 SOT23 Package Suffix F Top View Pin 1 floating or connected to pin 2 ORDERING INFORMATION E-Line, 3 pin,Rev Package Suffix R Bottom View Pin 3 floating or connected to pin 1 SO8 Package Suffix N8 Top View Part No Tol% Package Partmark Part No Tol% Package Partmark ZRA125A03 3 E-Line • ZRA12503 ZRA125R03 3 E-Line * ZRA125R3 ZRA125A02 2 E-Line • ZRA12502 ZRA125R02 2 E-Line * ZRA125R2 ZRA125A01 1 E-Line • ZRA12501 ZRA125R01 1 E-Line * ZRA125R1 ZRA125F03 3 SOT23 12A ZRA125Y03 3 E-Line ZRA12503 ZRA125F02 2 SOT23 12B ZRA125Y02 2 E-Line ZRA12502 ZRA125F01 1 SOT23 12D ZRA125Y01 1 E-Line ZRA12501 ZRA125N803 3 SO8 ZRA12503 ZRA125N802 2 SO8 ZRA12502 ZRA125N801 1 SO8 ZRA12501 * E-Line 3 pin Reversed E-Line 2 pin • E-Line 3 pin ZRA125 ZRA125 CONNECTION DIAGRAMS E-Line, 2 pin Package Suffix Y Bottom View E-Line, 3 pin Package Suffix A Bottom View Pin 1 floating or connected to pin 3 SOT23 Package Suffix F Top View Pin 1 floating or connected to pin 2 ORDERING INFORMATION E-Line, 3 pin,Rev Package Suffix R Bottom View Pin 3 floating or connected to pin 1 SO8 Package Suffix N8 Top View Part No Tol% Package Partmark Part No Tol% Package Partmark ZRA125A03 3 E-Line • ZRA12503 ZRA125R03 3 E-Line * ZRA125R3 ZRA125A02 2 E-Line • ZRA12502 ZRA125R02 2 E-Line * ZRA125R2 ZRA125A01 1 E-Line • ZRA12501 ZRA125R01 1 E-Line * ZRA125R1 ZRA125F03 3 SOT23 12A ZRA125Y03 3 E-Line ZRA12503 ZRA125F02 2 SOT23 12B ZRA125Y02 2 E-Line ZRA12502 ZRA125F01 1 SOT23 12D ZRA125Y01 1 E-Line ZRA12501 ZRA125N803 3 SO8 ZRA12503 ZRA125N802 2 SO8 ZRA12502 ZRA125N801 1 SO8 ZRA12501 * E-Line 3 pin Reversed E-Line 2 pin • E-Line 3 pin