NJM2825 Precision Micropower Shunt Voltage Reference ■GENERAL DESCRIPTION ■PACKAGE OUTLINE NJM2825 is a precision and low quiescent current shunt voltage reference. Reference voltage form bandgap circuit has guaranteed the high accuracy of the ±0.5% with trimming. In addition the temperature drift of 10ppm/°C typ. was actualized by the temperature compensating circuit. The reference voltage circuit operates by consumed low quiescent current of the 0.7µA for low power technology. The Output capacitor is unnecessary by the phase compensating circuit which is built in. Tolerates capacitive loads, it is easy to use for application. It is suitable for data converters, instrumentation, and other applications where precision reference is required. ■FEATURES ● Precision Reference Voltage 1,200mV±0.5% ● Low temperature coefficient 10ppm/°C typ. ● Low Quiescent Current 0.7µA max. ● No Output Capacitor Required ● Tolerates Capacitive Loads ● Bipolar Technology ● Package Outline NJM2825F : SOT-23-5 (MTP5) ■BLOCK DIAGRAM NJM2825F ■PRODUCT VARIATION NJM2825 ±0.5%, IMIN=0.7µA NJM2823 ±0.4%, IMIN=60µA ■PIN CONFIGURATION CATHODE 5 CATHODE NC 1 ANODE 2 VREF NC 3 FB 4 FB NJM2825F ANODE Ver.2007-09-28 -1- NJM2825 ■ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL Cathode Voltage VKA Cathode Current IK Cathode-Anode Reverse Current -IK Power Dissipation PD Operating Temperature Range TOPR Storage Temperature Range TSTG MAXIMUM RATINGS 14 20 10 200 -40 ∼ +85 -40 ∼ +125 ■RECOMMENDED OPERATING CONDITIONS (Ta=25°C) PARAMETER SYMBOL MIN. TYP. Cathode Voltage Cathode Current VKA IK VREF 0.7µ MAX. UNIT 13 12 V mA – – ■ELECTRICAL CHARACTERISTICS (IK=0.8µA,Ta=25°C) PARAMETER SYMBOL TEST CONDITION Reference Voltage Load Regulation Reference Voltage Change vs. Cathode Voltage Change Minimum Operating Current Feedback Current Dynamic Impedance VREF ∆VREF/ ∆IK ∆VREF/ ∆VKA IMIN IFB ⎮ZKA⎮ MIN. TYP. MAX. UNIT VFB=VA VFB=VA, IMIN≤ IK≤ 200µA VFB=VA, 200µA ≤ IK≤ 2mA VFB=VA, 2mA≤ IK≤ 12mA (*1) (*1) (*1) (*1) 1194.0 – – – 1200.0 0.2 0.7 3.4 1206.0 0.7 2 10 mV mV mV mV ⎮VREF⎮≤ VKA≤ 13V, IK=2µA R1=120kΩ, R2=val (Note 1) (*2) – -1 -2 mV/V VREF≤ VKA≤ 5V 5V≤ VKA≤ 13V R1=∞, R2=120kΩ VFB=VA, IK=0.7µA∼12mA (*2) (*2) (*2) (*1) – – – – 0.3 1 0.3 0.4 0.7 2 1 1.1 µA µA nA Ω MIN. TYP. MAX. UNIT ■TEMPERATURE CHARACTERISTICS (IK=0.8µA, Ta= -40°C ∼ 85°C) PARAMETER SYMBOL TEST CONDITION Reference Voltage Change (Note 2) Reference Voltage (Note 2) Feedback Current Change UNIT V mA mA mW °C °C ∆VREF_T VFB=VA (*1) – 0.8 10 2.3 30 mV ppm/°C VREF_T VFB=VA (*1) 1191.7 1200.0 1208.3 mV R1=∞, R2=120kΩ (*2) – 0.4 – nA IFB_T Note 1: ⎮VREF⎮···Reference voltage includes error. Note 2: Reference Voltage Change is defined as ∆VREF_T [mV] = ± < Reference Voltage Change [ppm/°C] > × <-40°C ∼ 25°C> × VREF The maximum value of “Reference Voltage Change” is determined based on sampling evaluation from the 5 initial production lots, and thus not tested in the production test. Therefore, these values are for the reference design purpose only. (*1): Test Circuit (Fig.1) (*2): Test Circuit (Fig.2) -2- Ver.2007-09-28 NJM2825 ■TEST CIRCUIT VKA Input VKA Input IK VREF IK CATHODE VREF R1 FB CATHODE FB R2 ANODE IFB Fig.1 VKA=VREF to test circuit ANODE Fig.2 VKA>VREF to test circuit R2 ⎞ ⎛ VKA = VREF⎜1 + ⎟ + IFB × R2 R1 ⎠ ⎝ VFB=VA ■TYPICAL CHARACTERISTICS Reference Voltage vs. Temperature (IK=0.8µA, VFB=VA) 15 Reference Voltage Change ∆VREF (mV) Reference Voltage VREF [mV] 1206 1204 Reference Voltage vs Cathode Current (VFB=VA ) Ta=-40 oC 12 1202 1200 1198 1196 1194 -50 9 6 o Ta=25 C 3 o Ta=75 C 0 0.0001 0.001 0.01 0.1 1 10 Cathode Current Ik (mA) -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) Reference Voltage vs. Cathode Voltage Reference Voltage vs. Cathode Current A (mV) FB 1400 1000 800 600 400 (R1=120kΩ, R2=val, IK=2µA, Ta=25oC) 1202 1200 REF 1200 Reference Voltage V Reference Voltage VREF (mV) o (V =V , Ta=25 C) 100 1198 1196 1194 1192 1190 1188 0 Ver.2007-09-28 0.2 0.4 0.6 0.8 Cathode Current Ik (µA) 1 0 5 10 Cathode Voltage VK (V) 15 -3- NJM2825 ■TYPICAL CHARACTERISTICS Dynamic Impedance vs. Frequency (V =V , Ta=25 C) 10 FB 2 A IK=0.8µA Cout=0 µF 1 IK=10µA Cout=0 µF 0.1 0.01 IK=0.8µA Cout=0.047 µF 0.001 0.0001 0.01 IK=10µA Cout=0.1 µF 0.1 1 10 100 Frequency f (kHz) 1000 Feedback Current IFB (nA) Dynamic Impedance |ZKA| (Ω) o Feedback Current vs. Temperature (R1=Open, R2=120kΩ, IK=0.8µA) 1.5 1 0.5 0 -50 -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) Sefty Operating Boundary Condition (V =V , Ta=25oC) FB Cathode Current IK (µA) 1 A Ceramic Capacitor 0.8 0.6 Stable Operation Region 0.4 Note) Oscillation might occur while operating within the range of safety curve. 0.2 So that, it is necessary to make ample margins by taking considerations of fluctuation of the device. Unstable Operation Region 0 0.001 0.01 0.1 1 Output Capacitance Co (µF) 10 Power Dissipation vs. Temperature (MTP5=Itself, Tj= ∼125oC) 200 Power Dissipation P D (mW) 250 150 100 50 0 0 -4- 25 50 75 100 Ambient Temperature Ta (oC) Ver.2007-09-28 NJM2825 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. Ver.2007-09-28 -5-