Low-Cost Precision Sensor

Signal Conditioner

4

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Note 1: Excludes sensor or load current.

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

Note 3: The sensor and the MAX1452 must 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 volt-

age range of +1.7V to +4.25V.

Note 7: Programming of the EEPROM at room temperature is recommended.

Note 8: Allow a minimum of 6ms elapsed time before sending any command.

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Current-Source Reference

Resistor Temperature Coefficient

1300

ppm/°C

FSOTC Resistor

75

k

Ω

FSOTC Resistor Temperature

Coefficient

1300

ppm/°C

TEMPERATURE-TO-DIGITAL CONVERTER

Temperature ADC Resolution

8

Bits

Offset

±3

LSB

Gain

1.45

°C/bit

Nonlinearity

±0.5

LSB

Lowest Digital Output

00

hex

Highest Digital Output

AF

hex

UNCOMMITTED OP AMP

Open-Loop Gain

Ω

90

dB

Input Common-Mode Range

V

Output Swing

0.02

0.02

V

Output-Voltage High

4.85

4.90

V

Output-Voltage Low

0.05

0.15

V

Offset

-20

+20

mV

Unity Gain Bandwidth

2

MHz

EEPROM

Maximum Erase/Write Cycles

(Note 7)

10k

Cycles

Minimum Erase Time

(Note 8)

6

ms

Minimum Write Time

100

µs