Rainbow-electronics MAX1109 Manual de usuario descargar pdf (Pagina 5)

MAX1108/MAX1109

Single-Supply, Low-Power,

2-Channel, Serial 8-Bit ADCs

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS—MAX1109 (continued)

= +4.5V to +5.5V; unipolar input mode; COM = GND, f

SCLK

= 500kHz, external clock (50% duty cycle); 10 clocks/conversion

cycle (50ksps); 1µF capacitor at REF, external +4.096V reference at REF; T

= T

MIN

to T

MAX

; unless otherwise noted. Typical values

are at T

= +25°C.)

ps<50Aperture Jitter

ns10Aperture Delay

kHz400Internal Clock Frequency

0 to 0.5mA (Note 7) ppm/°C±50REF Tempco

CONDITIONS

REFSC

REF Short-Circuit Current

mV2.5Load Regulation

kHz50 500

V3.936 4.096 4.256V

REF

Output Voltage

+4.096V at REF, full scale,

500kHz external clock

µA1 20Input Current

1.0 V

+ 0.05Input Voltage Range

µF1Capacitive Bypass at REF

UNITSMIN TYP MAXSYMBOLPARAMETER

External clock, 2MHz

dBSINADSignal-to-Noise Plus Distortion 49

µs1t

ACQ

Track/Hold Acquisition Time

External clock, 500kHz, 10 sclks/conv

Internal clock

µs

CONV

Conversion Time (Note 5)

SFDRSpurious Free Dynamic Range dB

THD

Total Harmonic Distortion

(up to the 5th harmonic)

-70

Full-Power Bandwidth MHz

Unipolar input, V

COM

= 0 0 V

REF

-3dB rolloff MHz

0.8

-3dB

Small-Signal Bandwidth 1.5

CH_

Input Voltage Range (Note 4) V

Multiplexer Leakage Current µA

On/off-leakage current,

= 0 or V

±0.01 ±1

pFC

Input Capacitance 18

Bipolar input, V

COM

or V

CH1

= V

REF

/ 2,

referenced to COM or CH1

±V

REF

/ 2

MHz2

External Clock Frequency Range

DYNAMIC PERFORMANCE (10kHz sine-wave input, 4.096Vp-p, 50ksps, 500kHz external clock)

ANALOG INPUTS

TRACK/HOLD

EXTERNAL REFERENCE

INTERNAL REFERENCE

For data transfer only

1 2 3 4 5 6 7 8 9 10 ... 19 20

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Rainbow-electronics MAX1109 Manual de usuario Pagina 5

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