cs5520-bp Cirrus Logic, Inc., cs5520-bp Datasheet - Page 28

• Manufacturer Part Number: cs5520-bp
• Description: 16/20-bit Bridge Transducer A/d Converters
• Manufacturer: Cirrus Logic, Inc.

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Digital Inputs
RST - Reset, PIN 13.
CS - Chip Select, PIN 14.
SCLK - Serial Data Clock, PIN 16.
SID - Serial Input Data, PIN 17.
SMODE - Serial Interface Mode, PIN 24.
Analog Inputs
AIN+ and AIN- - Analog Inputs, PINS 6, 7.
VREF+ and VREF- - Voltage Reference Inputs, PINS 9,10.
MDRV+ - Modulator Differential Voltage Reference, PIN 1.
MDRV- - Modulator Differential Voltage Reference, PIN 2.
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Reset pin initializes all calibration registers to a known condition and places the serial port into
the command mode.
An input which can be enabled by an external device to gain control over the serial port. When
this pin is high, SOD is in a high impedance state if SMODE = 0.
A clock signal at this pin determines the output rate of the data from the SOD pin and the input
data rate on the SID pin.
This pin is used for inputting command and configuration words or inputting calibration words.
Data is input at a rate determined by SCLK. SID is in a don’t care state when no data is being
clocked in.
Selects the operating mode of the serial port. When low the serial port operates in the 5 or 4
wire interface mode. When high the chip will enter the 3 wire interface mode.
The analog input signals from the transducer. These are true differential inputs.
These are the differential analog reference voltage inputs.
Positive terminal of the internal differential voltage reference which can be tied to the positive
supply (VA+) or ground (AGND).
This is the -3.75V modulator differential voltage reference output and can be used to generate
an analog reference. Note this is with reference to the MDRV+ pin.
CS5516, CS5520
DS74F2
DS74F1