CS5516-ASZ Cirrus Logic Inc, CS5516-ASZ Datasheet - Page 21

• Manufacturer Part Number: CS5516-ASZ
• Description: IC ADC 16BIT BRIDGE TRAS 24-SOIC
• Manufacturer: Cirrus Logic Inc

Specifications of CS5516-ASZ

• Number Of Bits: 16
• Sampling Rate (per Second): 60
• Data Interface: Serial
• Number Of Converters: 2
• Power Dissipation (max): 37.5mW
• Voltage Supply Source: Analog and Digital, Dual ±
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (0.300", 7.50mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 598-1101-5

SID pin is not being written. When reading
SOD, SCLK cannot be continuous but must
burst one clock cycle per bit.
The continuous read conversion data mode is
also functional in the 3-wire interface mode. Is-
sue one 88(H) command word to the converter.
Then wait for SOD to go low. Issue 8 SCLKs to
clear the data ready function. The MSB data bit
will then appear on the SOD pin. Issue 24
SCLKs to read the conversion word. At the fall-
ing edge of the 24th SCLK SOD will return
high. SOD will go low at the next DRDY falling
time to indicate a new conversion word. Eight
SCLKs must again be issued to clear the data
ready function before clocking out the data con-
version word. The SOD pin will continue to
toggle low each time a word is available even if
the conversion data is not read. To terminate the
continuous conversion mode, input an 8-bit com-
mand word immediately after reading a
conversion word.
The user should perform all data reads and com-
mand writes within 51,000 XIN clock cycles
after SOD falls to avoid ambiguity as to who
controls the serial port.
DS74F1
DS74F2
DRDY
SCLK
SOD
SID
CS
Figure 5. Continuous Read Conversion Data Mode (4 or 5 Wire)
8 SCLKs
8 Data Bits
Clock Cycles
81,920 XIN
24 SCLKs
Port Access Period
XIN Clock Cycles
24 Data Bits
Valid 51,000
Serial Port Initialization
If for any reason the off-chip microcontroller
fails to know whether the serial port of the
CS5516/20 is in data mode or command mode,
the following initialization procedure can be is-
sued to the port to force the CS5516/20 into the
command mode. Write 128 or more 1’s to the
SID pin. Then issue a single 0 to the SID pin.
The port will then be initialized into the com-
mand mode and will be waiting for an 8-bit
command word.
Bridge Excitation Options
The CS5516/CS5520 A/D converters are opti-
mized for Wheatstone bridge applications. The
converters support either dc or ac (switched dc)
bridge excitation.
DC Bridge Excitation
The CS5516/CS5520 can be configured for dc
bridge excitation in either of two ways. The
EXC bit of the configuration register can be set
for either internal or for external excitation. If
set to internally-controlled mode (EXC = 0), the
F1 and F0 bits must be set to logic 0s. In this
condition, the bridge can be excited from a dc
supply with a resistor divider to develop the ap-
propriate reference voltage for the VREF+ and
VREF- pins. Note that the bridge excitation
24 SCLKs
24 Data Bits
CS5516, CS5520
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