Datasheet

LTC6078/LTC6079
12
60789fa
TYPICAL APPLICATIO S
U
6 Decade Current Log Amplifi er
60789 TA07
V
DD
V
CC
133k
100k
Q1
1000pF
V
OUT
1µF
10nA ≤ I
IN
≤ 10mA
Q1, Q2: DIODES INC. DMMT3906W
A TO D: LTC6079
V
OUT
≈ 150mV • log (I
IN
) + 1.23V, I
IN
IN AMPS
PRECISION
RESISTOR PT146
1k
+3500ppm/°C
100Ω
1.58k
+
–
D
–
+
B
+
–
C
+
–
A
1µF
Q2
33µF
I
IN
100Ω
GND
LT6650
IN OUT
Humidity Sensor Signal Conditioner
60789 TA08
V
DD
V
OUT
0V TO 5V
0% TO 100% RH
34.8k
49.9k
499k
1k
10k 47.5k
1k
100k
V
DD
V
DD
V
DD
V
SUP
5.2V TO 20V
V
DD
5V
1µF
0.01µF
0.1µF
BAT54S
1µF
IN OUT
SHDN
LT1761-5
BYP
V
DD
OUT
SET DIV
GRD GND
100k
OFFSET TRIM
GAIN TRIM
49.9k
M1
V
DD
V
BIAS
100k
100k
A TO C: LTC6079
H: GE PARAMETRICS G-CAP 2 HUMIDITY SENSOR
148pF TO 178pF, 0% TO 90% RH
M1: VN2222L
1000pF
75pF
H
+
–
C
+
–
B
+
–
A
1M
100k
0.1µF
LTC6906
V
BIAS