Rainbow-electronics MAX1400 User Manual download pdf (Page 3)

MAX1400

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

Oversampling (Sigma-Delta) ADC

________________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(V+ = +5V ±5%, V

= +2.7V to +5.25V, V

REFIN+

= +2.50V, REFIN- = AGND, f

CLKIN

= 2.4576MHz, T

= T

MIN

to T

MAX

, unless other-

wise noted. Typical values are at T

= +25°C.)

Unipolar mode

CONDITIONS

-116.7 116.7

Bipolar mode

UNITSMIN TYP MAXSYMBOLPARAMETER

%FSR

-58.35 58.35

Offset DAC Range (Note 6)

Input referred %FSR-2.5 2.5Offset DAC Full-Scale Error

For filter notch 50Hz, ±0.02 · f

NOTCH

MF1 = 0, MF0 = 0, f

CLKIN

= 2.4576MHz (Note 8)

DAC code = 0000

For filter notch 50Hz, ±0.02 · f

NOTCH

MF1 = 0, MF0 = 0, f

CLKIN

= 2.4576MHz

150

dB100NMR

Normal Mode 50Hz Rejection

(Note 8)

At DC

µV

RMS

Additional Noise from Offset

DAC (Note 7)

REFIN and AIN for BUFF = 0 VV

AGND

V+

Common-Mode Voltage Range

(Note 9)

BUFF = 1

BUFF = 1 10AIN Input Current (Note 10) nA

AGND

V+

+ 200mV - 1.5

Absolute and Common-Mode

AIN Voltage Range

pA40

DC Input Leakage Current

(Note 10)

Unipolar mode 16.7

Bipolar mode

%FSR

8.35

Offset DAC Resolution

For filter notch 60Hz, ±0.02 · f

NOTCH

MF1 = 0, MF0 = 0, f

CLKIN

= 2.4576MHz (Note 8)

150

CMRCommon-Mode Rejection

For filter notch 60Hz, ±0.02 · f

NOTCH

MF1 = 0, MF0 = 0, f

CLKIN

= 2.4576MHz

dB100NMR

Normal Mode 60Hz Rejection

(Note 8)

REFIN and AIN for BUFF = 0 V

AGND

V+

- 30mV + 30mV

Absolute Voltage Range Input

REFIN and AIN for

BUFF = 0

= +25°C

= T

MIN

to T

MAX

10 nA

BUFF = 0

BUFF = 1, all gains 30

AIN Input Capacitance

(Note 11)

Bipolar input range (U/B bit = 0)

±V

REF

gain

AIN Differential Voltage Range

(Note 12)

Gain = 1

Gain = 2

Gain = 4

Gain = 8, 16, 32, 64, 128

Unipolar input range (U/B bit = 1)

0 to V

REF

gain

%FSR0Offset DAC Zero-Scale Error

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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Rainbow-electronics MAX1400 User Manual Page 3

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