LDMOS RF Power-Amplifier Bias

Controller

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21

Temp Value

<R><NA><0000h> The signed 2’s complement direct-to-temperature measurement.

VD Value

ID1 Value

ID2 Value

Status

Hi Alarm

<R><NA><00h> High-Alarm Status bits.

a) Temp Hi

High-alarm status for temperature measurement.

c) VD Hi

d) ID1 Hi

e) ID2 HI

Lo Alarm

<R><NA><40h> Low-Alarm Status bits.

a) Temp Lo

Low-alarm status for temperature measurement.

the value is above the low threshold.

c) VD Lo

d) ID1 Lo

e) ID2 Lo

I/O Status

<R><NA><see below> Status of the FAULT pin.

a) Fault

Logical value of the FAULT pin. Fault is logic HIGH during power-on.

b) Mint

Maskable Interrupt. FAULT is an open-drain output. In case FAULT was pulled low

externally or was missing the external pullup resistor, this bit reflects the logical value

the DS1870 is trying to output on the FAULT pin. If any ‘Hi Alarm’ or ‘Lo Alarm’ is

active and its corresponding ‘Fault Ena’ bit is enabled, or ‘RDBY’ is a 1, then this bit is

active high. Otherwise, this bit is a zero.

c) Rdyb

A2D Status

<R/W><V><00h> Status of completed conversions. At power-on, these bits are cleared and are

set as each conversion is completed. These bits can be cleared so that completion

of new conversions may be verified.

a) Temp Rdy

Temperature conversion is ready.

c) VD Rdy

d) ID1 Rdy

e) ID2 Rdy