IPS2550 Datasheet

© 2022 Renesas Electronics Corporation

39

June 20, 2022

When the AGC is enabled, the normal operating range is:

▪

VDD/2 ±1.5V = 1.0 to 4.0V for 5V mode

▪

VDD/2 ±900mV = 0.75 to 2.55V for 3.3V mode or 5V mode (default)

When the AGC is disabled, the operating output voltage range is not limited and defined by the input voltage multiplied by the total gain in the

signal path. Note that the gain has to be set correctly otherwise the output voltage moves into the diagnostic ranges.

The limits for the diagnostic ranges are defined by the user. Typical diagnostic ranges are:

▪

Diagnostic low ≤ 3 to 5% VDD

▪

Diagnostic high ≥ 95 to 97%VDD.

For the IPS2550, the output voltage in diagnostic mode depends on the error condition and the value of the external pull-up or pull-down

resistors, see section 18.2.1.2 details.

The IPS2550 provides the following options for diagnostics indication through the analog outputs:

▪

Diagnostics indication on output pins disabled

▪

Diagnostics only on SIN_SCL and COS_SDA pins

▪

Diagnostics only on SINN and COSN pins

▪

Diagnostics on all four analog output pins

Each individually checked error can be enabled or disabled for diagnostics indication.

If diagnostic is enabled and an error occurs, the selected outputs are switched off. By connecting external pull-up or pull-down resistors, the

output voltage is either pulled towards VDD into the Diagnostic high range or pulled towards GND into the Diagnostic low range, see Figure 24.

Figure 24. Selection of Diagnostic Range

VDD

GND

VDD

GND

VDD

Pull-Up

resistor on

Receiver end

Diagnostic

High

VDD

GND

VDD

GND

VDD

Pull-Down

resistor on

Receiver end

Diagnostic

Low

Output

switched off

in error case

Output

switched off

in error case

Note that during programming through the analog outputs using the I2C interface, the SIN_SCL and COS_SDA pins need to be connected to

external pull-up resistors. If the Sensor module includes on-board pull-down resistors, the external pull-up resistors for programming must be

selected properly to provide adequate high levels that does not exceed the load current on the outputs. Therefore, if the IPS2550 is to be

programmed on module level, for example for end-of-line calibration, the use of pull-up resistors for diagnostics indication is recommended.