Rainbow Electronics MAX1403 - Manual (Page 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 DD = +2.7V to +3.6V, V REFIN+ = +1.25V, REFIN- = AGND, f CLKIN = 2.4576MHz, T A = T MIN to T MAX , unless
otherwise noted. Typical values are at T A = +25°C.)
BUFF = 0
BUFF = 1
Bipolar mode
REFIN and AIN for
BUFF = 0
BUFF = 1
Unipolar mode
REFIN and AIN for BUFF = 0
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
pF
34
AIN Input Capacitance
(Notes 12)
nA 10 AIN Input Current (Note 11)
nA 10
pA 40 DC Input Leakage Current
(Note 11)
V
V
AGND
V+
+ 200mV - 1.5
Absolute and Common-Mode
AIN Voltage Range
V
V AGND V+
- 30mV + 30mV
Absolute Input Voltage Range
V V AGND V+
Common-Mode Voltage Range
(Note 10)
dB 100 NMR
Normal Mode 60Hz Rejection
(Note 9)
dB 100 NMR
Normal Mode 50Hz Rejection
(Note 9)
150
150
-58.35 58.35
%FSR
-116.7 116.7
Offset DAC Range (Note 7)
dB
90
CMR Common-Mode Rejection
µV RMS 0
Additional Noise from Offset
DAC (Note 8)
%FSR
16.7
Offset DAC Resolution
8.35
%FSR -2.5 2.5 Offset DAC Full-Scale Error
%FSR 0 Offset DAC Zero-Scale Error
UNITS MIN TYP MAX SYMBOL PARAMETER
T A = +25°C
T A = T MIN to T MAX
38
45
60
BUFF = 1, all gains 30
Unipolar input range (U/ B bit = 1)
V
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.)