Rainbow-electronics MAX1109 Bedienungsanleitung PDF herunterladen (Seite 9)

MAX1108/MAX1109

Single-Supply, Low-Power,

2-Channel, Serial 8-Bit ADCs

_______________________________________________________________________________________

0.5

-0.5

0 300

INTEGRAL NONLINEARITY

vs. CODE

-0.1

-0.3

-0.4

-0.2

0.4

0.3

MAX1108/09-13

DIGITAL CODE

INL (LSB)

50 100 150 200 250

0.1

0.2

-100

0 30

FFT PLOT

-60

-80

MAX1108/09-14

FREQUENCY (kHz)

AMPLITUDE (dB)

5 10 15 20 25

-20

-40

CH_

= 9997Hz, 2Vp-p

SAMPLE

= 53.25kHz

21.0

18.0

0 6

CONVERSION TIME vs. SUPPLY VOLTAGE

19.0

18.5

20.5

MAX1108/09-15

SUPPLY VOLTAGE (V)

CONVERSION TIME(µs)

1 2 3 4 5

20.0

19.5

INTERNAL CONVERSION MODE

Typical Operating Characteristics (continued)

= +3.0V (MAX1108), V

= +5.0V (MAX1109); external conversion mode; f

SCLK

= 500kHz; 50ksps; external reference; 1µF at

REF; T

= +25°C; unless otherwise noted.)

Pin Description

Sampling Analog InputsCH0, CH12, 3

Reference voltage for analog-to-digital conversion (internal or external reference). Reference input for

external reference. Bypass internal reference with 1µF capacitor to GND.

REF5

GroundGND4

Active-Low Chip Select. Data is not clocked into DIN unless CS is low. When CS is high, DOUT is high

impedance.

Serial Data Output. Data is clocked out on the falling edge of SCLK. High impedance when CS is high.

DOUT9

Serial Data Input. Data is clocked in at the rising edge of SCLK.DIN8

Common reference for analog inputs. Sets zero-code voltage in single-ended mode. Must be stable to

±0.5LSB during conversion.

COM6

Serial Clock Input. Clocks data in and out of serial interface. In external clock mode, SCLK also sets the

conversion speed.

SCLK10

Positive Supply VoltageV

FUNCTIONNAME

-40 100

CONVERSION TIME vs. TEMPERATURE

MAX1108/09-16

TEMPERATURE (°C)

CONVERSION TIME (µs)

-20 0 20 40 60 80

INTERNAL CONVERSION MODE

= 3V

= 5V

1.0010

0.9980

-40 100

NORMALIZED REFERENCE VOLTAGE

vs. TEMPERATURE

0.9990

0.9985

1.0005

MAX1108/09-17

TEMPERATURE (°C)

REFERENCE VOLTAGE (V)

-20 0 20 40 60 80

1.0000

0.9995

-100

0 25

CHANNEL-TO-CHANNEL

CROSSTALK vs. FREQUENCY

-70

-80

-90

-10

-20

MAX1108/09-18

FREQUENCY (kHz)

CROSSTALK (dB)

5 10 15 20

-30

-40

-50

-60

CH_OFF

= V

REFp-p

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 19 20

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