NJM2820, NJM2821, NJM2822 ADJUSTABLE HIGH PRECISION SHUNT REGULATOR ■GENERAL DESCRIPTION ■PACKAGE OUTLINE The NJM2820/ 2821/ 2822 is a 1.25V precision shunt regulator. High precision voltage accuracy of ±0.7%* is realized by the total optimization from chip design to packaging. In addition, it features low cathode current of 80uA for low current operation. It is suitable for AC-DC converter secondary circuit, reference voltage applications for A/D and D/A converters, and other applications where precision reference is required. NJM2820F NJM2821F NJM2822F ■FEATURES ● High Precision Voltage Reference 1.250V±0.7% ● Flow Soldering* ● Minimum Input Current 80uA typ. ● Operating Voltage VREF to 13V ● Adjustable Output Voltage For External Resistance two Parts ● Bipolar Technology ● Package Outline MTP5 ■BLOCK DIAGRAM ■PIN CONFIGURATION CATHODE 5 CATHODE NC 1 ANODE 2 NC 3 4 REFERENCE NJM2820F REFERENCE NC 1 5 REFERENCE ANODE 2 VREF NC 3 4 CATHODE NJM2821F ANODE NC 1 5 ANODE ANODE 2 CATHODE 3 4 REFERENCE NJM2822F * These contents are based on the result that evaluated the arbitrary sample. The characteristic is not guaranteed. The design and reliability that fully considered flow mounting are checked but the influence by temperature profile etc. is also considered. Please consult with sales representatives for a recommendation temperature profile. Ver 2.1 - 1 - NJM2820, NJM2821, NJM2822 ■ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL Cathode Voltage VKA Continuous Cathode Current IK Reference Input Current IREF Power Dissipation PD Operating Temperature Range TOPR Storage Temperature Range TSTG MAXIMUM RATINGS 14 -30 ∼ 50 -10 ∼ 0.05 (MTP5) 200 -40 ∼ +85 -40 ∼ +150 ■RECOMMENDED OPERATING CONDITIONS (Ta=25°C) PARAMETER SYMBOL MIN. TYP. MAX. Cathode Voltage Cathode Current VKA IK VREF 0.5 – – 13 30 ■ELECTRICAL CHARACTERISTICS (IK=1mA,Ta=25°C) PARAMETER SYMBOL TEST CONDITION Reference Voltage Reference Voltage Change vs. Cathode Voltage Change Reference Input Current Minimum Input Current Cathode Current (Off Cond.) Dynamic Impedance VREF ∆VREF/ ∆VKA IREF IMIN IOFF ZKA VKA=VREF VREF≤VKA≤5V 5V≤VKA≤13V (*1) (*2) (*2) (*2) R1=10kΩ, R2=∞ VKA=VREF, ∆VREF=1% (*1) (*3) VKA=13V, VREF=0V VKA= VREF, f≤1kHz 0.5mA≤IK≤30mA (*1) ■TEMPERATURE CHARACTERISTICS (IK=1mA,Ta=-40°C ∼ 85°C) PARAMETER SYMBOL TEST CONDITION Reference Voltage Change Reference Input Current Change ∆VREF VKA=VREF (*1) ∆IREF R1=10kΩ,R2=∞ (*2) UNIT V mA mA mW °C °C UNIT V mA MIN. TYP. MAX. UNIT 1241 – 1250 – 1259 ±2.7 mV mV/V – – ±2.0 mV/V – – 2.0 80 4.0 500 uA uA – 0.01 1.0 uA – 0.12 – Ω MIN. TYP. MAX. UNIT – ±10 – mV – 0.5 – uA VREF···Reference voltage includes error. (*1): Test Circuit (Fig.1) (*2): Test Circuit (Fig.2) (*3): Test Circuit (Fig.3) In case of NJM2822, all electrical characteristics are measured referencing to the anode terminal of PIN 5. -2- NJM2820, NJM2821, NJM2822 ■TEST CIRCUIT INPUT VKA INPUT VKA IK R1 R2 VREF Fig.1 VKA=VREF to test circuit VREF Fig.2 VKA>VREF to test circuit R1 VO = VKA = VREF1 + + IREF × R1 R2 VO=VKA=VREF INPUT IK IREF VKA IOFF IK=1mA 10kΩ 470uF 10kΩ Fig.3 IOFF to test circuit Fig.4 Gain and Phase to test circuit ■POWER DISSIPATION VS. AMBIENT TEMPERATURE Power Dissipation PD (mW) 250 200 150 100 50 0 0 25 50 75 Ambient Temperature Ta (°C) 100 -3- NJM2820, NJM2821, NJM2822 Reference Voltage vs. Cathode Current (VKA=VREF,Ta=25°C) 1260 Reference Voltage VREF (mV) 1255 1250 1245 1240 0 10 20 Reference Voltage vs. Cathode Current (VKA=VREF,Ta=25°C) 1400 1200 1000 800 600 0 30 20 80 100 Cathode Current (Off Cond.) vs. Cathode Voltage (VREF=0V,Ta=25°C) 1 Cathode Current IOFF (nA) Reference Voltage Change ∆VREF (mV) Reference Voltage Change vs. Cathode Voltage (IK=1mA,R1=Variable,R2=10kΩ,Ta=25°C) 4 3 2 1 0.8 0.6 0.4 0.2 0 0 0 5 10 0 15 5 10 Cathode Voltage VKA (V) Cathode Voltage VKA (V) Dynamic Impedance (IK=0.5~30mA,VKA=VREF,Ta=25°C) 1.2 80 Voltage Gain · Phase vs. Frequency (Fig.4 Test Circuit,Ta=25°C) 60 1 Voltage Gain AV (dB) Dynamic Impedance |ZKA| (Ω) 60 Cathode Current IK (uA) Cathode Current IK (mA) 0.8 0.6 0.4 0.2 0 1 -4- 40 10 100 1k 10k 100k Cathode Current Frequency f (Hz) 15 360 270 Gain 40 180 20 90 0 0 -20 -90 Phase -40 -60 -80 100 -180 -270 1k 10k 100k 1M Frequency f (Hz) -360 10M Phase Φ (deg) Reference Voltage VREF (mV) ■TYPICAL CHARACTERISTICS NJM2820, NJM2821, NJM2822 ■TYPICAL CHARACTERISTICS 250 Sefty Operating Boundary Condition (VKA=VREF,Ta=25°C) Cathode Current I K (uA) Stable Operaion Region 200 150 Note) 100 50 Aunstable Operaion Region 0 0.001 0.01 0.1 1 Output Capacetance Co (uF) 10 1255 1250 1245 1240 0 25 50 75 100 125 150 3 Reference Input Current vs. Temperature (IK=1mA,R1=10kΩ,R2= ) 2.5 2 1.5 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) Ambient Temperature Ta (°C) Cathode Current (Off Cond.) vs. Temperature (VKA=13V,VREF=0V) 1 Output Noise Voltage vs. Temperature (IK=1mA,VKA=VREF) 140 Output Noise Voltage VNO (uVrms) Cathode Current IOFF (uA) -50 -25 Reference Input Current IREF (uA) Reference Voltage VREF (mV) Reference Voltage vs. Temperature (IK=1mA,VKA=VREF) 1260 Oscillation might occur while operating within the range of safety curve. So that, it is necessary to make ample margins by taking considerations of fluctuation of the device. 0.8 0.6 0.4 0.2 120 100 80 60 40 20 0 0 -50 -25 0 25 50 75 100 125 150 Ambient emperature Ta (°C) -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) -5- NJM2820, NJM2821, NJM2822 MEMO [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. -6-