Datasheet LM334S (Analog Devices) - 9

LM134 Series
U TYPICAL APPLICATIO S Precision 10nA Current Source Micropower 5V Reference
15V VIN = 6.5V TO 15V V+ R R LM334 LM134 5.6k R1 V– 2.7k 3 7 + R2 6 LM4250 V 226k LT1004-1.2 OUT = 5V 2 8 – LT1004-1.2 R3 15V 22M (1.235V) 4 3.01M 150pF 1M 1% 2 – 7 1M R4 BUFFERED 6 1% 100MΩ LT1008 VOLTAGE 3 OUTPUT + 8 TA15 IO 200pF 4 IO = 10nA Z –15V O ≥ 1012Ω COMPLIANCE = –14V TO 12.5V TA14
FET Cascoding for Low Capacitance and/or Ultrahigh Output Impedance
VIN VIN ISET V+ LM334 Q1* R V+ LM334 RSET R V– RSET Q2* V– ISET –VIN –V TA16 IN *SELECT Q1 OR Q2 TO ENSURE AT LEAST 1V ACROSS THE LM134. VP (1 – ISET/IDSS) ≥ 1.2V.
W W SCHE ATIC DIAGRA
V+ Q7 Q8 Q4 Q5 Q6 Q3 C1 Q2 Q1 50pF R V– 134 SD 9