MAX1400(1999) データシートの表示（PDF） - Maxim Integrated

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MAX1400
(Rev.:1999)

+5V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC

Maxim Integrated 

+5V, 18-Bit, Low-Power, Multichannel,

Oversampling (Sigma-Delta) ADC

ELECTRICAL CHARACTERISTICS (continued)

(V+ = +5V ±5%, VDD = +2.7V to +5.25V, VREFIN+ = +2.50V, REFIN- = AGND, fCLKIN = 2.4576MHz, TA = TMIN to TMAX, unless other-

wise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

OFFSET DAC

Offset DAC Range (Note 6)

Unipolar mode

Bipolar mode

-116.7

-58.35

116.7

%FSR

58.35

Offset DAC Resolution

Unipolar mode

Bipolar mode

16.7

%FSR

8.35

Offset DAC Full-Scale Error

Input referred

-2.5

2.5 %FSR

Offset DAC Zero-Scale Error

0

%FSR

Additional Noise from Offset

DAC (Note 7)

DAC code = 0000

0

µVRMS

ANALOG INPUTS/REFERENCE INPUTS (Specifications for AIN and REFIN, unless otherwise noted.)

At DC

90

For filter notch 50Hz, ±0.02 · fNOTCH,

150

Common-Mode Rejection

CMR MF1 = 0, MF0 = 0, fCLKIN = 2.4576MHz (Note 8)

dB

Normal Mode 50Hz Rejection

(Note 8)

Normal Mode 60Hz Rejection

(Note 8)

Common-Mode Voltage Range

(Note 9)

NMR

NMR

For filter notch 60Hz, ±0.02 · fNOTCH,

150

MF1 = 0, MF0 = 0, fCLKIN = 2.4576MHz (Note 8)

For filter notch 50Hz, ±0.02 · fNOTCH,

100

MF1 = 0, MF0 = 0, fCLKIN = 2.4576MHz

For filter notch 60Hz, ±0.02 · fNOTCH,

100

MF1 = 0, MF0 = 0, fCLKIN = 2.4576MHz

REFIN and AIN for BUFF = 0

VAGND

dB

dB

V+

V

Absolute Voltage Range Input

REFIN and AIN for BUFF = 0

VAGND

- 30mV

V+

+ 30mV

V

Absolute and Common-Mode

AIN Voltage Range

BUFF = 1

VAGND

+ 200mV

V+

- 1.5

V

DC Input Leakage Current

(Note 10)

AIN Input Current (Note 10)

REFIN and AIN for

BUFF = 0

BUFF = 1

TA = +25°C

TA = TMIN to TMAX

40

pA

10

nA

10

nA

Gain = 1

34

AIN Input Capacitance

(Note 11)

BUFF = 0

Gain = 2

Gain = 4

38

45

pF

Gain = 8, 16, 32, 64, 128

60

BUFF = 1, all gains

30

AIN Differential Voltage Range

(Note 12)

Unipolar input range (U/B bit = 1)

Bipolar input range (U/B bit = 0)

0 to VREF /

gain

V

±VREF /

gain

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