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 

MAX1450

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

MAX1450AAP.................................................-40°C to +125°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

MIN

GENERAL CHARACTERISTICS

Supply Voltage

VDD

4.5

Supply Current

IDD

TA = +25°C (Note 1)

ANALOG INPUT (PGA)

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)

TYP

5.0

2.8

1.0

±0.5

0.01

1

90

±100

10 to

30

MAX UNITS

5.5

V

3.5

mA

MΩ

μV/°C

%VDD

ms

dB

mV

mV/V

Offset Gain

∆VOUT

∆VOFFSET

1.15

V/V

Offset Gain

ANALOG OUTPUT (PGA)

Differential Signal Range Gain

Minimum Differential Signal

Gain

Differential Signal Path

Temperature Coefficient

Output Voltage Swing

∆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

1.15

V/V

39 to 221

V/V

36

39

44

V/V

±50

ppm/°C

VSS +

0.25

VSS +

0.05

VDD -

0.25

V

VDD -

0.05

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