MAX1495 查看數據表（PDF） - Maxim Integrated

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MAX1495

3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers

Maxim Integrated 

3.5- and 4.5-Digit, Single-Chip

ADCs with LCD Drivers

ABSOLUTE MAXIMUM RATINGS

AVDD to GND............................................................-0.3V to +6V

DVDD to GND ...........................................................-0.3V to +6V

AIN+, AIN- to GND ...............................VNEG to + (AVDD + 0.3V)

REF+, REF- to GND..............................VNEG to + (AVDD + 0.3V)

LOWBATT to GND ...................................-0.3V to (AVDD + 0.3V)

INTREF, RANGE, DPSET1, DPSET2, PEAK,

HOLD to GND ......................................-0.3V to (DVDD + 0.3V)

DPON to GND..........................................-0.3V to (DVDD + 0.3V)

VNEG to GND ...........................................-2.6V to (AVDD + 0.3V)

Maximum Current into Any Pin ...........................................50mA

Continuous Power Dissipation (TA = +70°C)

32-Pin TQFP (derate 20.7mW/°C above +70°C).....1652.9mW

28-Pin SSOP (derate 9.5mW/°C above +70°C) ...........762mW

28-Pin DIP (derate 14.3mW/°C above +70°C) ........1142.9mW

Operating Temperature Range...............................0°C to +70°C

Junction Temperature ......................................................+150°C

Storage Temperature Range .............................-60°C to +150°C

Lead Temperature (soldering, 10s) .................................+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

(AVDD = DVDD = +2.7V to +5.25V, GND = 0, VREF+ - VREF- = 2.048V (external reference), CNEG= 0.1µF. All specifications are TMIN

to TMAX, unless otherwise noted. Typical values are at +25°C, unless otherwise noted.)

PARAMETER

DC ACCURACY

Noise-Free Resolution

Integral Nonlinearity (Note 1)

SYMBOL

CONDITIONS

MAX1493/MAX1495

MAX1491

2.000V range

INL

200mV range

MIN

TYP

MAX UNITS

-19,999

-1999

+19,999

Count

+1999

±1

Count

±1

Range Change Accuracy

(VAIN+ - VAIN- = 0.100V) on 200mV range /

(VAIN+ - VAIN- = 0.100V) on 2.0V range

10:1

Ratio

Rollover Error

VAIN+ - VAIN- = full scale,

VAIN- - VAIN+ = full scale

Output Noise

Offset Error (Zero Input Reading)

Gain Error

Offset VIN = 0 (Note 2)

(Note 3)

Offset Drift (Zero Reading Drift)

VIN = 0

Gain Drift

INPUT CONVERSION RATE

Conversion Rate

ANALOG INPUTS (AIN+, AIN-) (bypass to GND with 0.1µF or greater capacitors)

AIN Input Voltage Range

Differential (Note 4)

RANGE = GND

RANGE = DVDD

Absolute GND referenced

-0

-0.5

-2.0

-0.2

-2.2V

±1.0

10

0.1

±1

5

Count

+0

+0.5

µVP-P

Reading

%FSR

µV/°C

ppm/°C

Hz

+2.0

+0.2

V

+2.2V

Normal Mode 50Hz and 60Hz

Rejection (Simultaneously)

50Hz and 60Hz ±2%

100

dB

Common-Mode 50Hz and 60Hz

Rejection (Simultaneously)

Common-Mode Rejection

Input Leakage Current

Input Capacitance

Dynamic Input Current

CMR

CMR

For 50Hz ±2% and 60Hz ±2%,

RSOURCE < 10kΩ

At DC

TA = +25°C

(Note 5)

150

dB

100

dB

10

nA

10

pF

-20

+20

nA

2 _______________________________________________________________________________________

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