Pin description – Rainbow Electronics MAX11043 User Manual
Page 10
MAX11043
4-Channel, 16-Bit, Simultaneous-Sampling ADCs
with PGA, Filter, and 8-/12-Bit Dual-Stage DAC
10
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Pin Description
PIN
NAME
FUNCTION
1
AINBN
Channel B Analog Negative Input
2
REFA
Channel A Reference Bypass. Bypass REFA with a nominal 1µF capacitor to AGND.
3
AINAN
Channel A Analog Negative Input
4
AINAP
Channel A Analog Positive Input
5, 26
AVDD
Analog Supply. Bypass each AVDD with a nominal 1µF capacitor to AGND.
6, 24, 33
AGND
Analog Ground. Connect AGND inputs together.
7, 23
DGND
Digital Ground. Connect DGND inputs together.
8, 22
DVDD
Digital Supply. Bypass each DVDD with a nominal 1µF capacitor to DGND.
9
DVREG
Regulated Digital Core Supply. Bypass DVREG to DGND with a 10µF capacitor.
10
UP/
DWN
DAC Step Direction Select. Drive high to step up, drive low to step down when DACSTEP is toggled.
11
DACSTEP
DAC Step Input. Drive high to move the DAC output in the direction of UP/
DWN on the next rising
edge of the system clock.
12
CONVRUN
Convert Run. Drive high to start continuous conversions on all 4 channels. The device is idle when
CONVRUN is low.
13
CS
Active-Low Serial-Interface Chip Select
14
DOUT
Serial-Interface Data Out. Data transitions on the rising edge of SCLK.
15
DIN
Serial-Interface Data In. Data is sampled on the rising edge of SCLK.
16
SCLK
Serial-Interface Clock
17, 35
I.C.
Internally Connected. Connect to either AGND or DGND.
18
EOC
Active-Low End-of-Conversion Indicator.
EOC asserts low to indicate that new data is ready.
19
OSCIN
Crystal Oscillator/External Clock Input
20
OSCOUT
Crystal-Oscillator Output. Leave unconnected when using external clock.
21
SHDN
Active-High Shutdown Input. Drive high to shut down the MAX11043.
25
AOUT
Buffered 12-Bit Fine DAC Output
27
REFDACL
Fine DAC Low Reference Bypass. Bypass REFDACL with a nominal 1µF capacitor to AGND.
28
REFDACH
Fine DAC High Reference Bypass. Bypass REFDACH with a nominal 1µF capacitor to AGND.
29
REFDAC
Coarse DAC Reference Bypass. Bypass REFDAC with a nominal 1µF capacitor to AGND.
30
REFD
Channel D Reference Bypass. Bypass REFD with a nominal 1µF capacitor to AGND.
31
AINDN
Channel D Analog Negative Input
32
AINDP
Channel D Analog Positive Input
34
REFBP
Main Reference Bypass. Bypass REFBP with a nominal 1µF capacitor to AGND.
36
AINCN
Channel C Analog Negative Input
37
AINCP
Channel C Analog Positive Input
38
REFC
Channel C Reference Bypass. Bypass REFC with a nominal 1µF capacitor to AGND.
39
REFB
Channel B Reference Bypass. Bypass REFB with a nominal 1µF capacitor to AGND.
40
AINBP
Channel B Analog Positive Input
—
EP
Exposed Pad. Connect EP to a ground plane on the PCB to enhance thermal dissipation. Internally
connected to AGND. Not intended as an electrical connection point.