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| MAX1450 Datasheet, PDF (2/12 Pages) Maxim Integrated Products – Low-Cost, 1%-Accurate Signal Conditioner for Piezoresistive Sensors | |||
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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 âAbsolute Maximum Ratingsâ 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
Mâ¦
µV/°C
%VDD
ms
dB
mV
mV/V
Offset Gain
âVOUT
âVOFFSET
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
âVOUT
âVOFFTC
Eight selectable gains (Table 3)
At any gain
5k⦠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 = 5kâ¦
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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