Datasheet LT1057, LT1058 (Analog Devices) - 13

LT1057/LT1058
TYPICAL APPLICATIONS Instrumentation Amplifier with Shield Driver
3 + 1/4 1 1k 10k LT1058 2 – RF 9.1k GUARD RG 15V 1k + 10 5 + + 4 8 1/4 1/4 7 INPUT LT1058 LT1058 OUTPUT – – 9 6 RG – 11 1k –15V GUARD 13 R – F GAIN = 10(1+R 9.1k F/RG) ≈ 100 1/4 14 10k IB = 5pA LT1058 RIN = 1012Ω 12 + 1k BW = 350kHz 10578 TA09
100dB Range Logarithmic Photodiode Amplifier
6 Q4 4 10 1M 50k DARK 5 11 2k Q5 1M TRIM FULL-SCALE 12 750k* TRIM 500pF 50k* – 1/2 LT1057 IP + 0.01µF – 1/2 0.033µF LT1057 EOUT + LT1021-10V 10k* 15V – 1 IN OUT 3k 2 3 10k* LM301A Q2 + 2k 33Ω 15 7
RESPONSE DATA
14 8
LIGHT (900µM) DIODE CURRENT CIRCUIT OUTPUT
Q1 Q3 1MW 350µA 10.0V 13 9 100µW 35µA 7.85V 15V 10µW 3.5µA 5.70V 1µW = HP-5082-4204 PIN PHOTODIODE. 350nA 3.55V 100nW 35nA 1.40V Q1–Q5 = CA3096. CONNECT SUBSTRATE OF CA3096 10nW 3.5nA –0.75V ARRAY TO Q4’s EMITTER. *1% RESISTOR 100dB RANGE LOGARITHMIC PHOTODIODE AMPLIFIER 10578 TA10 10578fd 13 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION TYPICAL APPLICATION RELATED PARTS