2-Wire, 4–20mA

Smart Signal Conditioner

4

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__________________________________________Typical Operating Characteristics

0

0.5

1.0

1.5

2.0

2.5

-40

40

60

020

-20

80

100 120

SUPPLY CURRENT vs. TEMPERATURE

TEMPERATURE (°C)

-40

40

60

020

-20

80

100 120

TEMPERATURE (°C)

0

60

40

20

80

100

120

140

160

180

200

-40

40

60

020

-20

80

100 120

TEMPERATURE (°C)

0

1.5

1.0

0.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

Note 1: Excludes the sensor or load current.

Note 2: All electronics temperature errors are compensated together with sensor errors.

Note 3: The sensor and the MAX1459 must always be at the same temperature during calibration and use.

Note 4: This is the maximum allowable sensor offset.

Note 5: This is the sensor’s sensitivity normalized to its drive voltage, assuming a desired full-span output of 4V and a bridge

voltage of 2.5V. Sensors smaller than +10mV/V require an auxiliary op amp.

ELECTRICAL CHARACTERISTICS (continued)

V

0.5

Low-Level Output Voltage

V

4

High-Level Output Voltage

V

2

Input Hysteresis

V

Low-Level Input Voltage

V

High-Level Input Voltage

CONDITIONS

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

DIGITAL PINS