MAX148_10 datasheet(2/23 Pages) MAXIM

2 / 23 page

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

Serial 10-Bit ADCs

2 ______________________________________________________________________________________

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 = +70NC)

Plastic DIP (derate 11.11mW/NC above +70NC)..........889mW

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

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

Operating Temperature Ranges

MAX148_C_P/MAX149_C_P .............................. 0NC to +70NC

MAX148_E_P/MAX149_E_P ............................ -40NC to +85NC

MAX148_MJP/MAX149_MJP ........................ -55NC to +125NC

MAX149BMAP............................................... -55NC to +125NC

Storage Temperature Range............................ -60NC to +150NC

Lead Temperature (soldering, 10s) ................................+300NC

ELECTRICAL CHARACTERISTICS

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

MAX149—4.7FF capacitor at VREF pin; MAX148—external reference, VREF = 2.500V applied to VREF pin; TA = TMIN to TMAX, unless

otherwise noted.)

ABSOLUTE MAXIMUM RATINGS

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DC ACCURACY (Note 1)

Resolution

Bits

Relative Accuracy (Note 2)

INL

MAX14_A

±0.5

LSB

MAX14_B

±1.0

Differential Nonlinearity

DNL

No missing codes over temperature

±1

LSB

Offset Error

MAX14_A

±0.15

±1

LSB

MAX14_B

±0.15

±2

Gain Error (Note 3)

MAX14_A

±1

LSB

MAX14_B

±2

Gain Temperature Coefficient

±0.25

ppm/

°C

Channel-to-Channel Offset

Matching

±0.05

LSB

DYNAMIC SPECIFICATIONS (10kHz Sine-Wave Input, 0 to 2.500VP-P, 133ksps, 2.0MHz External Clock, Bipolar Input Mode)

Signal-to-Noise + Distortion

Noise

SINAD

Total Harmonic Distortion

THD

Up to the 5th harmonic

-70

Spurious-Free Dynamic Range

SFDR

Channel-to-Channel Crosstalk

65kHz, 2.500VP-P (Note 4)

-75

Small-Signal Bandwidth

-3dB rolloff

2.25

MHz

Full-Power Bandwidth

1.0

MHz

CONVERSION RATE

Conversion Time (Note 5)

tCONV

Internal clock, SHDN = unconnected

5.5

7.5

μs

Internal clock, SHDN = VDD

External clock = 2MHz, 12 clocks/

conversion

Track/Hold Acquisition Time

tACQ

1.5

μs

Aperture Delay

Aperture Jitter

< 50

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