MAX148 datasheet(2/24 Pages) MAXIM

2 / 24 page

+2.7V to +5.25V, Low-Power, 8-Channel,

Serial 10-Bit ADCs

_______________________________________________________________________________________

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);

MAX149—4.7µF capacitor at VREF pin; MAX148—external reference, VREF = 2.500 V 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–CH7, COM to AGND, DGND ............ -0.3V to (VDD + 0.3V)

VREF, REFADJ 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 11.11mW/°C above +70°C) ......... 889mW

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

CERDIP (derate 11.11mW/°C above +70°C) .............. 889mW

Operating Temperature Ranges

MAX148_C_P/MAX149_C_P .............................. 0°C to +70°C

MAX148_E_P/MAX149_E_P............................ -40°C to +85°C

MAX148_MJP/MAX149_MJP ........................ -55°C to +125°C

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

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

µs

1.5

tACQ

Differential Nonlinearity

Track/Hold Acquisition Time

Aperture Delay

µs

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

<50

Bits

Resolution

Gain Error (Note 3)

±1

Aperture Jitter

Offset Error

LSB

±1.0

INL

Relative Accuracy (Note 2)

LSB

±1

DNL

±0.15

±1

LSB

±0.15

±2

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

External clock = 2MHz, 12 clocks/conversion

Internal clock, SHDN = VDD

Internal clock, SHDN = FLOAT

MAX14_A

-3dB rolloff

65kHz, 2.500Vp-p (Note 4)

Up to the 5th harmonic

MAX14_A

MAX14_B

No missing codes over temperature

MAX14_A

MAX14_B

CONDITIONS

LSB

±2

MAX14_B

DC ACCURACY (Note 1)

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

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