ZAMC4100 datasheet(23/156 Pages) RENESAS

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ZAMC4100 Datasheet

January 26, 2016

1.3.2.

Analog-to-Digital Converter

Table 1.15 ADC Timing Parameters

Note: See Figure 1.1 for parameter definitions. All timing parameters below are calculated for the typical value of

the OSCH frequency.

Parameter

Symbol

Min.

Typ.

Max.

Unit

ADC maximum sample rate

1), 2)

SRMAX

250

Ksps

ADC continuous conversion phase

tCCNV

512

µs

ADC continuous conversion phase (external temperature mode)

tCCNV_TM

512

µs

ADC single conversion phase

tSCNV

522

µs

ADC single conversion phase (external temperature mode)

tSCNV_TM

µs

ADC settling time

tADC_STL

µs

ADC sampling time

tADC_SMP

509

µs

ADC sampling time (external temperature mode)

tADC_SMP_TM

µs

ADC conversion time

tADC_CNV

µs

ADC idle time

3), 6), 7)

tADC_IDLE

480

µs

The absolute maximum IDT target for ADC sample rate is 250ksps. IDT reserves the right to change the maximum ADC sample rate

if driven by further design considerations.

The maximum possible sample rate for external temperature conversion is SRMAX/8.

The ADC idle time is 0 for single external temperature conversion and continuous conversion at maximum SR.

Added to each single conversion and to the first conversion in continuous mode.

The parameter tADC_SMP is calculated using the formula:

(

)

CNV

ADC

MAX

SMP

ADC

−

, where n = [0:7] and n is the

decimal equivalent of the value configured in bit field ADCSR[2:0] in the ADCCONF register (see Table 3.37).

For external temperature measurement, the ADC sample time is fixed. Changing ADCSR[2:0] changes the ADC idle time.

The parameter tADC_IDLE is calculated using the formula:

(

)

CNV

ADC

SMP

ADC

MAX

IDLE

ADC

−

, where n = [3:7]

and n is the decimal equivalent of the value configured in bits ADCSR[2:0]. Important: For n = [0:2], tADC_IDLE = 0.

Figure 1.1 ADC Timing Parameters Definition

tADC_STL

tADC_CNV

tADC_SMP

tCCNV

tSCNV

tADC_STL

tADC_CNV

tADC_SMP_TM

All other ADC

conversions

Ext. temperature

ADC conversion

tADC_IDLE

tCCNV_TM

tSCNV_TM

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