NJM2825. Precision Micropower Shunt Voltage Reference

Transcription

1 Precision Micropower Shunt Voltage Reference GENERAL DESCRIPTION NJM2825 is a precision and low quiescent current shunt voltage reference. Reference voltage form bandgap circuit has guaranteed the high accuracy of the ±.5% with trimming. In addition the temperature drift of ppm/ C typ. was actualized by the temperature compensating circuit. The reference voltage circuit operates by consumed low quiescent current of the.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. PACKAGE OUTLINE NJM2825F FEATURES Precision,2mV±.5% Low temperature coefficient ppm/ C typ. Low Quiescent Current.7µA max. No Output Capacitor Required Tolerates Capacitive Loads Bipolar Technology Package Outline NJM2825F : SOT-23-5 (MTP5) PRODUCT VARIATION NJM2825 NJM2823 ±.5%, I MIN =.7µA ±.4%, I MIN =6µA BLOCK DIAGRAM PIN CONFIGURATION NC 5 2 NC 3 4 NJM2825F - -

2 ABSOLUTE MAXIMUM RATINGS (Ta=25 C) PARAMETER SYMBOL MAXIMUM RATINGS UNIT Cathode Voltage 4 V Cathode Current 2 ma Cathode-Anode Reverse Current - ma Power Dissipation P D 2 mw Operating Temperature Range T OPR C Storage Temperature Range T STG C RECOMMENDED OPERATING CONDITIONS (Ta=25 C) PARAMETER SYMBOL MIN. TYP. MAX. UNIT Cathode Voltage 3 V Cathode Current.7µ 2 ma ELECTRICAL CHARACTERISTICS ( =.8µA,Ta=25 C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT V =V A (*) mv Load Regulation V =V A, I MIN 2µA (*).2.7 mv / I V =V A, 2µA 2mA (*).7 2 mv K V =V A, 2mA 2mA (*) 3.4 mv V Change vs. Cathode REF / 3V, =2µA V Voltage Change KA R=2kΩ, R2=val (Note ) (*2) - -2 mv/v Minimum Operating 5V (*2).3.7 µa I Current MIN 5V 3V (*2) 2 µa Feedback Current I R=, R2=2kΩ (*2).3 na Dynamic Impedance Z KA V =V A, =.7µA 2mA (*).4. Ω TEMPERATURE CHARACTERISTICS ( =.8µA, Ta= -4 C 85 C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Change (Note 2) (Note 2) Feedback Current Change _T V =V A (*) mv ppm/ C _T V =V A (*) mv I _T R=, R2=2kΩ (*2).4 na Note : Reference voltage includes error. Note 2: Change is defined as _T [mv] = ± < Change [ppm/ C] > <-4 C 25 C> The maximum value of 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. (*): Test Circuit (Fig.) (*2): Test Circuit (Fig.2) - 2 -

3 TEST CIRCUIT Input Input R R2 I Fig. = to test circuit Fig.2 > to test circuit V =V A R2 VKA = VREF + + I R2 R TYPICAL CHARACTERISTICS VREF [mv] vs. Temperature ( =.8µA, V =V A ) Change VREF (mv) vs Cathode Current (V =V A ) Ta=-4 o C Ta=25 o C Ta=75 o C.... Cathode Current Ik (ma) VREF (mv) 4 2 vs. Cathode Current A Cathode Current Ik (µa) (mv) vs. Cathode Voltage (R=2kΩ, R2=val, I 22 K =2µA, Ta=25 o C) Cathode Voltage V K (V) - 3 -

4 TYPICAL CHARACTERISTICS Dynamic Impedance Z KA (Ω)... Dynamic Impedance vs. Frequency A IK=.8µA Cout=µF IK=.8µA Cout=.47 µf IK=µA Cout=µF IK=µA Cout=. µf... Frequency f (khz) Feedback Current I (na) Feedback Current vs. Temperature (R=Open, R2=2kΩ, =.8µA) Cathode Current (µa) Sefty Operating Boundary Condition A Ceramic Capacitor.8.6 Stable Operation Region.4.2 Unstable Operation Region... Output Capacitance Co (µf) Safety Operating Boundary Condition Test Circuit V + Rin=kΩ Note) 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. C OUT 25 Power Dissipation vs. Temperature (MTP5=Itself, Tj= 25 o C) Power Dissipation P D (mw)

5 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