MAX11043
4-Channel, 16-Bit, Simultaneous-Sampling ADCs
with PGA, Filter, and 8-/12-Bit Dual-Stage DAC
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
((V
AVDD
= +3.0V to +3.6V, V
DVDD
= +3.0V, C
DVREG
= 10µF, V
AGND
= V
DGND
= 0, common-mode input voltage = AVDD/2, V
REFBP
=
V
REFA
= V
REFB
= V
REFC
= V
REFD
= +2.5V (external reference), V
REFDAC
= V
REFDACH
= +1.25V (external reference), V
REFDACL
= 0,
C
REFBP
= C
REFA
= C
REFB
= C
REFC
= C
REFD
= C
REFDAC
= 1µF, f
SCLK
= 38.4MHz, f
EXCLK
= 38.4MHz (external clock applied to
OSCIN), clock divider set to 4, SHDN = DACSTEP = UP/DWN = DGND, CONVRUN = DVDD, all analog inputs driven directly through
a series 150Ω/330pF anti-alias filter, PGA gain = 1. Default filters and gain settings. T
A
= T
MIN
to T
MAX
, unless otherwise noted (Note 1).
Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Channel-to-Channel Isolation
Unused channels are shorted and
unconnected
80 104 dB
Channel Phase Matching
Between all channels, including complete
analog signal path
-0.12 +0.12 Degrees
DYNAMIC PERFORMANCE (All Modes)
All 4 channels 400
Conversion Rate
2 channels only 800
ksps
Minimum Throughput 5 ksps
Power-Supply Rejection Ratio DCPSRR 50 dB
ANALOG INPUTS (AINAP/AINAN, AINBP/AINBN, AINCP/AINCN, AINDP/AINDN)
Absolute Voltage Any Input (Note 4) 0 AVDD V
DIFF = 1 25
Direct input to ADC,
gain = 1
DIFF = 0 100
Direct input to ADC, gain = 2 7
Direct input to ADC, gain = 4 or 8 7
Input Impedance (Note 5)
PGA gain = 16 5.5
kΩ
Input Capacitance EQ mode only 50 pF
EQ FILTER (Analog and Digital)
Unity-Gain Frequency Default 5 kHz
Lower Transition Frequency Default, from 40dB/decade to 0dB/decade 190 kHz
Upper Transition Frequency Default, from 0dB/decade to -80dB/decade 205 kHz
LP FILTER
-3dB Corner Frequency Default 205 kHz
REFERENCE INPUT
REF_ Input Voltage Range V
REF_
2 2.5 2.8 V
Input Current 150 µA
REFBP Input Voltage Range V
REFBP
2 2.5 2.8 V
Input Current 700 µA
REFDAC Input Voltage Range V
REFDAC
1 1.25 1.4 V
Input Resistance 17 kΩ
(16 Seiten)
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