6.4 Device Functional Modes

The AMC0136 operates in one of the following states:

• OFF-state: The low-side of the device (DVDD) is below the DVDDUV threshold. The device is not responsive.

DOUT is Hi-Z state. Internally, DOUT and CLKIN are clamped to DVDD and DGND by ESD protection

diodes.

• Missing high-side supply: The low-side of the device (DVDD) is supplied and within Recommended Operating

Conditions . The high-side supply (AVDD) is below the AVDDUV threshold. The device outputs a constant

bitstream of logic 0's, as described in the section.

• Analog input overrange (positive fullscale input): AVDD and DVDD are within recommended operating

conditions but the analog input voltage VIN = (V INP – V SNSN ) is above the maximum clipping voltage

(VClipping, MAX). The device outputs a logic 0 every 128 clock cycles, as described in the Output Behavior in

Case of a Full-Scale Input section.

• Analog input underrange (negative fullscale input): AVDD and DVDD are within recommended operating

conditions but the analog input voltage VIN = (V INP – V SNSN ) is below the minimum clipping voltage

(VClipping, MIN). The device outputs a logic 1 every 128 clock cycles, as described in the Output Behavior in

Case of a Full-Scale Input section.

• Normal operation: AVDD, DVDD, and VIN are within the recommended operating conditions. The device

outputs a digital bitstream, as explained in the Digital Output section.

Table 6-1 lists the operational modes.

Table 6-1. Device Operational Modes

OPERATINAL

MODE

AVDD

DVDD

VIN

DEVICE

RESPONSE

OFF

Don't care

VDVDD < DVDDUV

Don't care

DOUT is Hi-Z state. Internally, DOUT and CLKIN

are clamped to DVDD and DGND by ESD

protection diodes.

Missing high-side

supply

VAVDD < AVDDUV

Valid(1)

Don't care

The device outputs a constant bitstream of logic

0's, as described in the section.

Input overrange

Valid(1)

Valid(1)

VIN > VClipping, MAX

The device outputs a logic 0 every 128 clock

cycles, as described in the Output Behavior in

Case of a Full-Scale Input section.

Input underrange

Valid(1)

Valid(1)

VIN < VClipping, MIN

The device outputs a logic 1 every 128 clock

cycles, as described in the Output Behavior in

Case of a Full-Scale Input section.

Normal operation

Valid(1)

Valid(1)

Valid(1)

Normal operation

(1)

"Valid" denotes within the recommended operating conditions.

AMC0136

SBASAZ0A – AUGUST 2024 – REVISED DECEMBER 2024

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