Rainbow-electronics MAX1403 Uživatelský manuál stáhnout pdf (Strana 3)

MAX1403

+3V, 18-Bit, Low-Power, Multichannel,

Oversampling (Sigma-Delta) ADC

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ELECTRICAL CHARACTERISTICS (continued)

(V+ = +2.7V to +3.6V, V

= +2.7V to +3.6V, V

REFIN+

= +1.25V, REFIN- = AGND, f

CLKIN

= 2.4576MHz, T

= T

MIN

to T

MAX

, unless

otherwise noted. Typical values are at T

= +25°C.)

BUFF = 0

BUFF = 1

Bipolar mode

REFIN and AIN for

BUFF = 0

BUFF = 1

Unipolar mode

REFIN and AIN for BUFF = 0

For filter notch 60Hz, ±0.02 · f

NOTCH

MF1 = 0, MF0 = 0, f

CLKIN

= 2.4576MHz

For filter notch 50Hz, ±0.02 · f

NOTCH

MF1 = 0, MF0 = 0, f

CLKIN

= 2.4576MHz

At DC

For filter notch 60Hz, ±0.02 · f

NOTCH

MF1 = 0, MF0 = 0, f

CLKIN

= 2.4576MHz (Note 9)

DAC code = 0000

Unipolar mode

Bipolar mode

Input referred

For filter notch 50Hz, ±0.02 · f

NOTCH

MF1 = 0, MF0 = 0, f

CLKIN

= 2.4576MHz (Note 9)

CONDITIONS

AIN Input Capacitance

(Notes 12)

nA10AIN Input Current (Note 11)

nA10

pA40

DC Input Leakage Current

(Note 11)

AGND

V+

+ 200mV - 1.5

Absolute and Common-Mode

AIN Voltage Range

AGND

V+

- 30mV + 30mV

Absolute Input Voltage Range

AGND

V+

Common-Mode Voltage Range

(Note 10)

dB100NMR

Normal Mode 60Hz Rejection

(Note 9)

dB100NMR

Normal Mode 50Hz Rejection

(Note 9)

150

-58.35 58.35

%FSR

-116.7 116.7

Offset DAC Range (Note 7)

CMRCommon-Mode Rejection

µV

RMS

Additional Noise from Offset

DAC (Note 8)

%FSR

16.7

Offset DAC Resolution

8.35

%FSR-2.5 2.5Offset DAC Full-Scale Error

%FSR0Offset DAC Zero-Scale Error

UNITSMIN TYP MAXSYMBOLPARAMETER

= +25°C

= T

MIN

to T

MAX

BUFF = 1, all gains 30

Unipolar input range (U/B bit = 1)

0 to V

REF

/ gain

AIN Differential Voltage Range

(Note 13)

Bipolar input range (U/B bit = 0)

±V

REF

/ gain

Gain = 1

Gain = 2

Gain = 4

Gain = 8, 16, 32, 64, 128

OFFSET DAC

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

1 2 3 4 5 6 7 8 ... 35 36

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