Magnetoresistive Sensor ICs, Nanopower Series

NOTICE

Absolute maximum ratings are the extreme limits that the device will withstand without damage to the device.

However, the electrical and mechanical characteristics are not guaranteed as the maximum limits (above

recommended operating conditions) are approached, nor will the device necessarily operate at absolute

maximum ratings.

Table 3. absolute Maximum Ratings

Characteristic

Condition

Min.

Typ.

Max.

unit

Operating temperature

ambient

-40 [-40]

—

85 [185]

°C [°F]

Soldering temperature

ambient applied for <10 s

—

—

265 [509]

°C [°F]

Supply voltage (Vs)

—

-0.5

—

5.5

V

Output (load) current

—

—

100

150

µA

Figure 1. Block/Electrical diagram

NOTICE

The magnetic field strength (Gauss) required to cause the switch to

change state (operate and release) will be as specified in the magnetic

characteristics. To test the switch against the specified magnetic

characteristics, the switch must be placed in a uniform magnetic field.

NOTICE

These magnetoresistive sensor ICs may have an initial output in

either the ON or OFF state if powered up with an applied magnetic

fieldinthedifferentialzone(appliedmagneticfield>Brpand<Bop).

Honeywellrecommendsallowing10μsforoutputvoltagetostabilize

after supply voltage has reached its final rated value.

Output

Flip

Flop

Clock

Counter

Decoder

AMR

Gnd-

Dual

Threshold

Comparator

Out

D

Q

0

Table 2. Magnetic Specifications (Vs = 1.65 V to 5.5 V, Ta = -40 °C to 85 °C [-40 °F to 185 °F].)

Characteristic

Min.

Typ.

Max.

unit

SM351LT:

operate (positive)

release (positive)

hysteresis

3

2

*

7

5

2

11

—

—

Gauss

SM353LT:

operate (positive)

release (positive)

hysteresis

6

3

*

14

10

4

20

—

—

Gauss

*At 1.65 V and -40 °C, the hysteresis can reach 0.1 Gauss.