PRECISION 2.5 VOLT LOW KNEE CURRENT VOLTAGE REFERENCE ISSUE 3 - MARCH 1998 ZRC250 DEVICE DESCRIPTION The ZRC250 uses a bandgap circuit design to achieve a precision micropower voltage reference of 2.5 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 ZRC250 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZRC250 is recommended for operation between 20uA and 5mA and so is ideally suited to low power and battery powered applications. Excellent performance is maintained tc an 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. FEATURES Small outline SOT23 and SO8 packages JO92 style packages No stabilising capacitor required Low knee current, 15uA typical Typical Tc 30pprv/C Typical slope resistance 0.40 +3, 2 and 1% tolerance industrial temperature range Operating current 20uA to 5mA Transient response, stable in less than 10us e@ Optional extended current range APPLICATIONS @#eeo#e?e8 4 6 8 @ Battery powered and portable equipment. @ instrumentation. @ Test equipment. SCHEMATIC DIAGRAM +KIE-KIL-WVVV ZRC250 ABSOLUTE MAXIMUM RATING Power Dissipation (Tamp=25C} Reverse Current 25mA Forward Current 25mA eos in (T1092 oO Operating Temperature -40 to 85C Eline > nin Toso) OO St T t -55 to 125C eld orage Temperature o S08 625 ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamp=25C SYMBOL PARAMETER CONDITIONS LIMITS TOL%: UNITS MIN | TYP | MAX Ve Reverse Breakdown Voltage | lp=150nA 2.475 (2.5 12.5625 | 1 Vv 2.45. 12.5 12.55 2 2.425 12.5 12.575 | 3 Imin Minimum Operating Current 13 420 HA ir Recommended Operating 0.02 5 | mA Current To T Average Reverse 30 190 ppm/ec Breakdown Voltage Temp. iniminy to Co. lawnax} Rs Slope Resistance 0.4 11 2 ZR Reverse Dynamic Impedance [ig = 1mA 0.3 10.8 Q t =100Hz lac=0.1 Ip i En Wideband Noise Voltage igs 150uA 60 : if = 10Hz to /uVirms) 10kHz i t Te (Vecman-Vacmim) x 1000000 ee Vp x (Timang- Timiny) 0 Note: Vaimax ~ Vaimin; is the maximum % deviation in reference voltage measured Bo over the full operating temperature range. . 8 Rex Va Change(laumim to launay) s IRemax 7 In uminy Reverse Voltage (V} 4-248 Reverse Characteristics ZRC250 TYPICAL CHARACTERISTICS Time (us) Transient Response - Single pulse feces 4-249 | 14 ! i 2.54 12 i iR=150uA ta mA Ss 1. : = ~ 2 2g, 256 08 z ia 249 Ee 8 7) 3 e 2 ig i O48 i 2 248 a2 i ' 2.47 0.001 oot oy 4 w 100 Forward Current (mA) Temperature (C} Forward Characteristics Temperature Drift 7000 4 2 = is 130 2 oy iS = o8 is 1 8 O68 / 6 e + 2 a a 62 at 1 16 7 15 100 1K 10K TORK Reference Current (mA) Frequency (kHz: Slope Resistance v Current Siope Resistance v Frequency jeepney nae enp epg Po, od | i i wb + + | se s ob z ~ : ! > Zos4 - i i 6 > Pou : i Poy i : \ poop mot | L ao: et on : i ee ee be] | | 2 Po iReBmA | } a book e. ' 5m : Sp topes por pod 1 = - : oy gi : IR 150A i i S bod \. ! i ~ 5 Oy g a Time {us Transient Response - Repetitive Test ZRC250 CONNECTION DIAGRAMS E-Line, 2 pin Package Suffix - Y Gnd | VR | 20 Bottom View E-Line, 3 pin,Rev Package Suffix - R Gnd | ' VR 20 36 Bottom View - Pin 3 floating or connected to pint E-Line, 3 pin Package Suffix - A lo VR 2o Gnd | 3 Bottom View Pin 1 floating or connected to pin 3 $O8 Package Suffix. - N8 a NE os | ia VR NC co 2 poo N/C NC etl, sts NC Gadexd |) 5s EG NO ~ Top View SOT23 Package Suffix F VR {3} LJ Gna Top View ~- Pin 1 floating or connected to pin 2 ZRC250 ORDERING INFORMATION Part No Tol% | Package | Partrnark Part No Tal% ; Package | Partmark ZRC250A03 | 3 E-Line | ZRC25003 ZRC250R03 | 3 E-Line * | ZRC250R3 ZRC250A02 | 2 E-Line * | ZRC25002 ZRC250R02 | 2 E-Line * | ZRC250R2 ZRC250A01 | 1 E-Line | ZRC25001 ZRC250R01 | 7 E-Line * | ZRC250R14 ZRC250F03 | 3 SOT23 25G ZRC250Y03 | 3 E-Line t | ZRC25003 ZRC250F02 | 2 SOT23 25H ZRC250V02 | 2 E-Line t | ZRC25002 ZRC250F01 | 1 SOT23 255 ZRC250Y01 14 E-Line t | ZRC25901 ZRC250N803 | 3 $o8 ZRC25003 * E-Line 3 pin Reversed ZRC250N802 j 2 $08 ZRC25002 ! eine 5 a ZRC250N801 | 1 SOB 2RC250034 4-251