MAX188 データシートの表示（PDF） - Maxim Integrated

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MAX188

Low-Power, 8-Channel, Serial 12-Bit ADCs

Maxim Integrated 

Low-Power, 8-Channel,

Serial 12-Bit ADCs

__________________________________________Typical Operating Characteristics

POWER-SUPPLY REJECTION

vs. TEMPERATURE

0.30

INTERNAL REFERENCE VOLTAGE

vs. TEMPERATURE

VDD = +5V ±5%

2.456

0.25

VSS = 0V or -5V

0.20

2.455

0.15

2.454

0.10

0.05

2.453

0.00

-0.05

-60 -40 -20 0 20 40 60 80 100 120 140

TEMPERATURE (°C)

2.452

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

CHANNEL-TO-CHANNEL OFFSET MATCHING

vs. TEMPERATURE

0.16

0.14

0.12

0.10

0.08

0.06

0.04

0.02

0

-60 -40 -20 0 20 40 60 80 100 120 140

TEMPERATURE (°C)

20

0

-20

-40

-60

-80

-100

-120

-140

0

MAX186/MAX188 FFT PLOT – 133kHz

ft = 10kHz

ft =fs1=0k1H3z3kHz

fs = 133kHz

TA = +25°C

33.25kHz

FREQUENCY

66.5kHz

_____________________________________________________________Pin Description

PIN

NAME

FUNCTION

1-8

CH0-CH7

Sampling Analog Inputs

9

VSS

Negative Supply Voltage. Tie to -5V ±5% or AGND

Three-Level Shutdown Input. Pulling SHDN low shuts the MAX186/MAX188 down to 10µA (max)

10

SHDN

supply current, otherwise the MAX186/MAX188 are fully operational. Pulling SHDN high puts the ref-

erence-buffer amplifier in internal compensation mode. Letting SHDN float puts the reference-buffer

amplifier in external compensation mode.

Reference Voltage for analog-to-digital conversion. Also, Output of the Reference Buffer Amplifier

11

VREF

(4.096V in the MAX186, 1.638 x REFADJ in the MAX188). Add a 4.7µF capacitor to ground when

using external compensation mode. Also functions as an input when used with a precision external

reference.

6 ________________________________________________________________________________________________

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