AMC7891 datasheet(24/43 Pages) TI2

Part #	AMC7891

Description	Analog Monitor and Control Circuit with 10-Bit, Multi-Channel ADC and Four DACs, Temperature Sensor, and 12 GPIOs

PDF	43 Pages

Scroll/Zoom	100%

Manufacturer	TI2 [Texas Instruments]

Direct Link	https://www.ti.com

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24 / 43 page

Start

(Reset)

Wait for

ADC Trigger

First Conversion

New Trigger

adc_mode

Changed?

Input Channel

Rewritten?

Is this the last conversion?

Convert next channel

Yes

Stop current conversion

Direct Mode

Yes

AMC7891

SBAS518A

– AUGUST 2011 – REVISED DECEMBER 2011

www.ti.com

CONVERSION MODES

Two types of ADC conversions are available: direct-mode and auto-mode. adc_mode bit (AMC_config register,

bit 13) sets the conversion mode. The default conversion mode is auto-mode (adc_mode = '1').

In direct-mode conversion, each analog channel within the specified group in register ADC_enable is converted a

single time. After the last channel is converted, the ADC goes into an idle state and waits for a new trigger.

Auto-mode conversion, on the other hand, is a continuous operation. In auto-mode, each analog channel within

the specified group is converted sequentially and repeatedly.

The flow chart of the ADC conversion sequence in Figure 27 shows the conversion process.

Figure 27. ADC Conversion Sequence

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AMC7891 Datasheet(PDF) 24 Page - Texas Instruments