MAX1450 查看數據表（PDF） - Maxim Integrated

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MAX1450

Low-Cost, 1%-Accurate Signal Conditioner for Piezoresistive Sensors

Maxim Integrated 

Low-Cost, 1%-Accurate Signal Conditioner

for Piezoresistive Sensors

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, VDD to VSS......................................-0.3V to +6V

All Other Pins ...................................(VSS - 0.3V) to (VDD + 0.3V)

Short-Circuit Duration, OUT, BBUF, BDRIVE .............Continuous

Continuous Power Dissipation (TA = +70°C)

SSOP (derate 8.00mW/°C above +70°C) ....................640mW

Operating Temperature Range

MAX1450CAP .....................................................0°C to +70°C

MAX1450EAP ..................................................-40°C to +85°C

Storage Temperature Range .............................-65°C to +165°C

Lead Temperature (soldering, 10sec) .............................+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VDD = +5V, VSS = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

GENERAL CHARACTERISTICS

Supply Voltage

Supply Current

ANALOG INPUT (PGA)

VDD

IDD TA = +25°C (Note 1)

Input Impedance

Input-Referred Offset

Temperature Coefficient

RIN

(Notes 2, 3)

Amplifier Gain Nonlinearity

Output Step-Response Time

63% of final value

Common-Mode Rejection Ratio

Input-Referred Adjustable Offset

Range

CMRR

From VSS to VDD

(Note 4)

Input-Referred Adjustable

Full-Span Output Range

(Note 5)

SUMMING JUNCTION (Figure 1)

MIN TYP MAX UNITS

4.5

5.0

5.5

V

2.8

3.5

mA

1.0

±0.5

0.01

1

90

±100

10 to 30

MΩ

µV/°C

%VDD

ms

dB

mV

mV/V

Offset Gain

∆VOUT

∆VOFFSET

1.15

V/V

Offset TC Gain

ANALOG OUTPUT (PGA)

Differential Signal Range Gain

Minimum Differential Signal

Gain

Differential Signal Path

Temperature Coefficient

Output Voltage Swing

Output Current Range

Output Noise

∆VOUT

∆VOFFTC

Eight selectable gains (Table 3)

At any gain

5kΩ load to VSS or VDD, TA = +25°C

No load, TA = TMIN to TMAX

VOUT = (VSS + 0.25V) to (VDD - 0.25V),

TA = +25°C

DC to 10Hz, gain = 39,

sensor impedance = 5kΩ

1.15

V/V

39 to 221

V/V

36

39

44

V/V

VSS +

0.25

VSS +

0.05

-1.0

(sink)

±50

ppm/°C

VDD -

0.25

V

VDD -

0.05

1.0

(source)

mA

500

µVRMS

2 _______________________________________________________________________________________

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