MAX188DCWP Maxim Integrated, MAX188DCWP Datasheet - Page 23
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MAX188DCWP
Manufacturer Part Number
MAX188DCWP
Description
Analog to Digital Converters - ADC Integrated Circuits (ICs)
Manufacturer
Maxim Integrated
Datasheet
1.MAX186CEWP-T.pdf
(24 pages)
Specifications of MAX188DCWP
Number Of Channels
8/4
Architecture
SAR
Conversion Rate
133 KSPs
Resolution
12 bit
Input Type
Single-Ended/Differential
Snr
Yes
Interface Type
4-Wire (SPI, Microwire, QSPI, TMS320)
Operating Supply Voltage
+/- 5 V, + 5 V
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Package / Case
SO-20
Maximum Power Dissipation
800 mW
Minimum Operating Temperature
0 C
Number Of Converters
1
Factory Pack Quantity
36
Voltage Reference
Internal 4.096 V or External
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX188DCWP
Manufacturer:
MAXIM/美信
Quantity:
20 000
Company:
Part Number:
MAX188DCWP+
Manufacturer:
Maxim Integrated Products
Quantity:
135
Figure 22 shows an application circuit to interface the
MAX186/MAX188 to the TMS320 in external clock
mode. The timing diagram for this interface circuit is
shown in Figure 23.
Use the following steps to initiate a conversion in the
MAX186/MAX188 and to read the results:
1) The TMS320 should be configured with CLKX (trans-
2) The MAX186/MAX188 CS is driven low by the XF_
3) An 8-bit word (1XXXXX11) should be written to the
4) The SSTRB output of the MAX186/MAX188 is moni-
Figure 21. QSPI Assembly-Code Timing
mit clock) as an active-high output clock and CLKR
(TMS320 receive clock) as an active-high input clock.
CLKX and CLKR of the TMS320 are tied together with
the SCLK input of the MAX186/MAX188.
I/O port of the TMS320 to enable data to be clocked
into DIN of the MAX186/MAX188.
MAX186/MAX188 to initiate a conversion and place
the device into external clock mode. Refer to Table
2 to select the proper XXXXX bit values for your spe-
cific application.
tored via the FSR input of the TMS320. A falling
edge on the SSTRB output indicates that the conver-
sion is in progress and data is ready to be received
from the MAX186/MAX188.
______________________________________________________________________________________
TMS320C3x to MAX186 Interface
Figure 22. MAX186/MAX188 to TMS320 Serial Interface
5) The TMS320 reads in one data bit on each of the
6) Pull CS high to disable the MAX186/MAX188 until
Low-Power, 8-Channel,
next 16 rising edges of SCLK. These data bits rep-
resent the 12-bit conversion result followed by four
trailing bits, which should be ignored.
the next conversion is initiated.
TMS320C3x
Serial 12-Bit ADCs
CLKR
CLKX
FSR
DR
DX
XF
CS
SCLK
DIN
DOUT
SSTRB
MAX186
MAX188
CS
SCLK
SSTRB
DIN
23