MAX1249AEPE+【PDF 12/24 页】IC ADC 10BIT SERIAL 16-DIP

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Sheet目录2008

8页 9页 10页 11页 [12页]13页 14页 15页 16页

MAX1248/MAX1249

+2.7V to +5.25V, Low-Power, 4-Channel,

Serial 10-Bit ADCs in QSOP-16

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD = +2.7V to +5.25V; COM = 0V; fSCLK = 2.0MHz; external clock (50% duty cycle); 15 clocks/conversion cycle (133ksps);

MAX1248—4.7F capacitor at VREF pin; MAX1249—external reference, VREF = 2.500V applied to VREF pin; TA = TMIN to TMAX,

unless otherwise noted.)

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.

VDD to AGND, DGND .............................................. -0.3V to +6V

AGND to DGND.................................................... -0.3V to +0.3V

CH0–CH3, COM to AGND, DGND ............ -0.3V to (VDD + 0.3V)

VREF to AGND........................................... -0.3V to (VDD + 0.3V)

Digital Inputs to DGND............................................ -0.3V to +6V

Digital Outputs to DGND ........................... -0.3V to (VDD + 0.3V)

Digital Output Sink Current .................................................25mA

Continuous Power Dissipation (TA = +70°C)

Plastic DIP (derate 10.53mW/°C above +70°C) ......... 842mW

QSOP (derate 8.30mW/°C above +70°C) ................... 667mW

CERDIP (derate 10.00mW/°C above +70°C) .............. 800mW

Operating Temperature Ranges

MAX1248_C_E/MAX1249_C_E .......................... 0°C to +70°C

MAX1248_E_E/MAX1249_E_E........................ -40°C to +85°C

MAX1248_MJE/MAX1249_MJE .................... -55°C to +125°C

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

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

tCONV

Conversion Time (Note 5)

5.5

7.5

MHz

1.0

Full-Power Bandwidth

MHz

2.25

Small-Signal Bandwidth

-75

Channel-to-Channel Crosstalk

SFDR

Spurious-Free Dynamic Range

-70

THD

Total Harmonic Distortion

SINAD

Signal-to-Noise + Distortion Ratio

LSB

±0.05

Channel-to-Channel Offset

Matching

ppm/°C

±0.25

Gain Temperature Coefficient

±0.5

Bits

Resolution

±1

Offset Error

LSB

±1.0

INL

Relative Accuracy (Note 2)

LSB

±1

DNL

±1

LSB

±2

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

External clock = 2MHz, 12 clocks/conversion

Internal clock, SHDN = VDD

Internal clock, SHDN = FLOAT

MAX124_A

-3dB rolloff

65kHz, 2.500Vp-p (Note 4)

Up to the 5th harmonic

MAX124_A

MAX124_B

No missing codes over temperature

MAX124_A

MAX124_B

CONDITIONS

Differential Nonlinearity

Aperture Delay

MHz

1.8

SHDN = FLOAT

<50

Aperture Jitter

MHz

0.1

2.0

1.5

tACQ

Track/Hold Acquisition Time

0.225

Internal Clock Frequency

SHDN = VDD

2.0

External Clock Frequency

Data transfer only

LSB

Gain Error (Note 3)

±2

MAX124_B

DC ACCURACY (Note 1)

DYNAMIC SPECIFICATIONS (10kHz sine-wave input, 0V to 2.500Vp-p, 133ksps, 2.0MHz external clock, bipolar input mode)

CONVERSION RATE

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