MAX11040K Maxim Integrated Products, MAX11040K Datasheet - Page 21

• Manufacturer Part Number: MAX11040K
• Description: (MAX11040K / MAX11060) Sigma-Delta ADCs
• Manufacturer: Maxim Integrated Products

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Table 7. Data Register (MAX11060) (continued)
The Data Rate Control register controls the output data
period, which corresponds to the output data rate of
the ADC. The data period is controlled by both a
coarse (FSAMPC[2:0]) and a fine (FSAMPF[10:0])
adjustment (see Table 8).
The final data rate is derived by dividing the XIN clock
frequency by a divider value. The divider value is a
function of FSAMPC[2:0] and FSAMPF[10:0]:
Figure 11. 192-Bit Data Read Operation Diagram for Two Cascaded Devices
(CASCIN0 = 0)
(DRDYIN0 = 0)
[31:29]
[28:26]
[25:24]
[23:8]
[7:5]
[4:2]
[1:0]
BIT
CASCOUT0
CASCOUT1
DRDYOUT0
DRDYOUT1
DOUT
SCLK
DIN
CS
Data Rate = f
CH3DATA[15:0]
24-/16-Bit, 4-Channel, Simultaneous-Sampling,
______________________________________________________________________________________
IC[2:0]
IC[2:0]
NAME
000
000
10
11
DEVICE 0 DATA READY
CHANNEL 0
24 CYCLES
DEVICE 0 AND DEVICE 1 DATA READY
DEVICE 0
XINCLOCK
Data Rate Control Register
Channel 2 address tag = 10
Channel 3 16-bit conversion result (two’s complement)
Channel 3 address tag = 11
—
Device address tag. IC[2:0] starts with 000 for the device nearest the master.
—
Device address tag. IC[2:0] starts with 000 for the device nearest the master.
CHANNEL 1
24 CYCLES
DEVICE 0
/Divider
DEVICE 1 TAKES OVER SPI BUS
CHANNEL 2
24 CYCLES
DEVICE 0
Cascadable, Sigma-Delta ADCs
24 CYCLES
CHANNEL 3
DEVICE 0
Note: Fractional results for the divider are rounded
down to the nearest integer. Coarse cycle factor and
fine cycle factor come from Table 8. The effect of
FSAMPF[10:0] in the formula has limitations as noted in
the table.
Examples of output data rate vs. FSAMPC[2:0] and
FSAMPF[10:0] are shown in Table 9. Table 10 shows
typical device performance for various data rate settings.
Divider = Coarse Cycle Factor x 384 + Fine Cycle
CHANNEL 0
24 CYCLES
DESCRIPTION
DEVICE 1
Factor x FSAMPF[10:0]
24 CYCLES
CHANNEL 1
DEVICE 1
24 CYCLES
CHANNEL 2
DEVICE 1
24 CYCLES
CHANNEL 3
DEVICE 1
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