Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS285-1.2/AMS385-1.2

0

°°C - 100°°C Thermometer

Lower Power Thermometer

0

°°C - 100°°C Thermometer

AMS385-1.2

150

R1

4k

R2

1k

R3

100

R4

220

1.5V

(1.3-1.6V)†

R

LM334

M

0-100

µA

I

OUT

Calibration

1

µA/°K

2. Remove short, adjust R2 for correct reading in

°C

† I

≅ 500 µA

≅ 2.4mA

LM334

M

AMS385-1.2

1.3 TO

1.6V‡

*

8k TO

12k†

≅ 5

† Select for operation at 1.3V

‡ I

Q

≅ 600µA to 900 µA

AMS385-1.2

150

R1

2k

R2

1k

R3

50

R4

100

1.3-1.6V

R

LM334

M

0-50

µA

I

OUT

Calibration

1.8

µA/°K

2. Remove short, adjust R2 for correct reading in

°F

Centigrade Thermometer

Micropower* 10V Reference

AMS385-1.2

R

R1

1k

V1

V2

LM334

90k

25k

27k

1.2k

2.3k

OUTPUT

1mV/° C

2.2k

1.5V†

Calibration

1. Adjust R1 so that V1 = temp at 1mV/

°K.

2. Adjust V2 to 273.2mV.

† I

µA to 150µA

150pF

AMS385-1.2

3.5M

500k

22M

1M

7

4

6

3

2

-

+

V

I

Q

10V

LM4250C

8

≅ 20µA standby current