AD22105

REV. 0

–8–

moist environment or printed circuit board contamination, can

have an adverse effect on the programmed setpoint temperature

of the AD22105. Depending on its source, leakage current can

setpoint temperature could be higher or lower than the intended

setpoint temperature by about 1

°C for each 75 nA of leakage.

With a 5 V power supply, an isolation resistance of 100 M

Ω

would create 50 nA of leakage current giving a setpoint

temperature error of about 0.7

°C (the R

protect against leakage from the power supply pin (as shown in

Figure 13).

C1

PIN 1

OUT

GND

Figure 13. Suggested PCB Layout

OUTLINE DIMENSIONS

Dimensions shown in inches and (mm).

8-Lead SOIC

(SO-8)

0.1968 (5.00)

0.1890 (4.80)

8

5

4

1

0.2440 (6.20)

0.2284 (5.80)

PIN 1

0.1574 (4.00)

0.1497 (3.80)

0.0688 (1.75)

0.0532 (1.35)

SEATING

PLANE

0.0098 (0.25)

0.0040 (0.10)

0.0192 (0.49)

0.0138 (0.35)

0.0500

(1.27)

BSC

0.0098 (0.25)

0.0075 (0.19)

0.0500 (1.27)

0.0160 (0.41)

8

°

0

°

0.0196 (0.50)

0.0099 (0.25)

x 45

°