Low-Cost Precision Sensor

Signal Conditioner

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3

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Output-Voltage Low

0.100

0.20

V

Output-Voltage High

4.75

4.87

V

Output Impedance at DC

0.1

Ω

Output Offset Ratio

ΔOffset

0.90

1.05

1.20

V/V

Output Offset TC Ratio

ΔOffset TC

0.9

1

1.2

V/V

Step Response and IC

(63% Final Value)

150

µs

Maximum Capacitive Load

1µF

Output Noise

DC to 1kHz (gain = minimum, source

impedance = 5k

0.5

BRIDGE DRIVE

Bridge Current

Ω

0.1

0.5

2

mA

Current Mirror Ratio

AA

10

12

14

A/A

4000

C000

hex

DIGITAL-TO-ANALOG CONVERTERS

DAC Resolution

16

Bits

ODAC Bit Weight

ΔCode

76

µV/bit

OTCDAC Bit Weight

ΔCode

38

µV/bit

FSODAC Bit Weight

ΔCode

76

µV/bit

FSOTCDAC Bit Weight

ΔCode

38

µV/bit

COARSE OFFSET DAC

IRODAC Resolution

Including sign

4

Bits

IRODAC Bit Weight

ΔCode

Input referred, DAC reference =

9

mV/bit

FSOTC BUFFER

Minimum Output-Voltage Swing

No load

0.1

V

Maximum Output-Voltage Swing

No load

V

Current Drive

-40

+40

µA

INTERNAL RESISTORS

Current-Source Reference

Resistor

75

k

Ω