AD7150

Rev. 0 | Page 19 of 28

CONFIGURATION REGISTER

Address Pointer 0x0F

8 Bits, Read/Write, Factory Preset 0x19

Table 12. Configuration Register Bit Map

Bit

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Mnemonic

ThrFixed

ThrMD1

ThrMD0

EnCh1

EnCh2

MD2

MD1

MD0

Default

0

0

0

1

1

0

0

1

Table 13.Configuration Register Bit Descriptions

Bit

Mnemonic

Description

7

ThrFixed

ThrFixed = 1 sets the fixed threshold mode. The outputs reflect comparison of data and a fixed (constant) value

of the threshold registers.

ThrFixed = 0 sets the adaptive threshold mode. The outputs reflect comparison of data to the adaptive

thresholds. The adaptive threshold is set dynamically, based on the history of the previous data.

These bits set the output comparators mode.

Output Active When

ThrMD1

ThrMD0

Threshold Mode

Adaptive Threshold Mode

Fixed Threshold Mode

0

0

Negative

data < average – sensitivity

Data < Threshold

0

1

Positive

data > average + sensitivity

Data > Threshold

1

0

In-Window

data > average – sensitivity

AND

data < average + sensitivity

‒

6

5

ThrMD1

ThrMD0

1

1

Out-Window

data < average – sensitivity

OR

data > average + sensitivity

–

4

EnCh1

Enables conversion on Channel 1.

3

EnCh2

Enables conversion on Channel 2.

Converter mode of operation setup.

MD2

MD1

MD0

Mode

Description

0

0

0

Idle

Part is fully powered up but performing no conversion.

0

0

1

Continuous

Conversion

Part is repeatedly performing conversions on the enabled

channel(s). If two channels are enabled, the part is

sequentially switching between them.

0

1

0

Single Conversion

Part performs a single conversion on the enabled channel. If

two channels are enabled, the part performs two

conversions, one on each channel. After finishing the

conversion(s), the part goes to the idle mode.

0

1

1

Power-Down

Powers down the on-chip circuits, except the digital

interface.

2

1

0

MD2

MD1

MD0

1

X

X

Reserved

Do not use these modes.