MAX1204AEPP Maxim Integrated, MAX1204AEPP Datasheet - Page 21

• Manufacturer Part Number: MAX1204AEPP
• Description: Analog to Digital Converters - ADC Integrated Circuits (ICs)
• Manufacturer: Maxim Integrated

Specifications of MAX1204AEPP

• Number Of Channels: 8/4
• Architecture: SAR
• Conversion Rate: 133 KSPs
• Resolution: 10 bit
• Input Type: Single-Ended/Differential
• Snr: 66 dB
• Interface Type: 4-Wire (SPI, Microwire, TMS320)
• Operating Supply Voltage: 4.75 V to 5.25 V
• Maximum Operating Temperature: + 85 C
• Package / Case: PDIP N
• Maximum Power Dissipation: 640 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Factory Pack Quantity: 18
• Voltage Reference: 4.096 V

Figure 19 shows an application circuit to interface the
MAX1204 to the TMS320 in external clock mode. Figure
20 is the timing diagram for this interface circuit.
Use the following steps to initiate a conversion in the
MAX1204 and to read the results.
1) The TMS320 should be configured with CLKX (trans-
2) The MAX1204’s CS is driven low by the TMS320’s
3) Write an 8-bit word (1XXXXX11) to the MAX1204 to
4) The MAX1204’s SSTRB output is monitored via the
5) The TMS320 reads in one data bit on each of the
6) Pull CS high to disable the MAX1204 until the next
Figure 20. TMS320 Serial-Interface Timing Diagram
Maxim Integrated
mit clock) as an active-high output clock and CLKR
(TMS320 receive clock) as an active-high input clock.
The TMS320’s CLKX and CLKR are tied together with
the MAX1204’s SCLK input.
XF_ I/O port to enable data to be clocked into the
MAX1204’s DIN.
initiate a conversion and place the device into exter-
nal clock mode. Refer to Table 2 to select the proper
XXXXX bit values for your specific application.
TMS320’s FSR input. A falling edge on the SSTRB
output indicates that the conversion is in progress
and data is ready to be received from the MAX1204.
next 16 rising edges of SCLK. These data bits repre-
sent the 10-bit conversion result followed by two
sub-bits and four trailing bits, which should be
ignored.
conversion is initiated.
SSTRB
DOUT
SCLK
DIN
CS
START
TMS320CL3x to MAX1204 Interface
SEL2
SEL1
SEL0
5V, 8-Channel, Serial, 10-Bit ADC
UNI/BIP SGL/DIF
PD1
with 3V Digital Interface
Figure 19. MAX1204 to TMS320 Serial Interface
PD0
TMS320LC3x
MSB
CLKX
CLKR
FSR
DX
DR
XF
LSB
MAX1204
CS
SCLK
DIN
DOUT
SSTRB
MAX1204
HIGH
IMPEDANCE
HIGH
IMPEDANCE
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