Typical Applications (Continued)
Low Drift Adjustable Voltage Reference
00564620
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∆ VOUT/∆T = 0.002%/˚C
All resistors and potentiometers should be wire-wound
P1: drift adjust
P2: VOUT adjust
Use LF155 for
j
j
j
Low IB
Low drift
Low supply current
Fast Logarithmic Converter
00564621
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Dynamic range: 100µA ≤ Ii ≤ 1mA (5 decades), |VO| = 1V/decade
Transient response: 3µs for ∆Ii = 1 decade
C1, C2, R2, R3: added dynamic compensation
VOS adjust the LF156 to minimize quiescent error
RT: Tel Labs type Q81 + 0.3%/˚C
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