ZAMC4100 Datasheet, PDF (23/155 Pages) Integrated Device Technology – Actuator and Motor Controller

ZAMC4100 Datasheet
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
ADC maximum sample rate ^{1), 2)}
Symbol
SRMAX
Min.
-
Typ.
250
Max.
-
Unit
Ksps
ADC continuous conversion phase
tCCNV
4
-
512
µs
ADC continuous conversion phase (external temperature mode)
tCCNV_TM
32
-
512
µs
ADC single conversion phase
tSCNV
14
-
522
µs
ADC single conversion phase (external temperature mode) ³⁾
tSCNV_TM
-
42
-
µs
ADC settling time ⁴⁾
tADC_STL
-
10
-
µs
ADC sampling time ⁵⁾
tADC_SMP
1
-
509
µs
ADC sampling time (external temperature mode) ⁶⁾
tADC_SMP_TM
-
29
-
µs
ADC conversion time
ADC idle time ^{3), 6), 7)}
tADC_CNV
tADC_IDLE
-
3
-
µs
0
-
480
µs
1) 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.
2) The maximum possible sample rate for external temperature conversion is SRMAX/8.
3) The ADC idle time is 0 for single external temperature conversion and continuous conversion at maximum SR.
4) Added to each single conversion and to the first conversion in continuous mode.
( ) ^{5) The parameter t}ADC_SMP ^{is calculated using the formula:} t _{ADC _SMP} = 2ⁿ SR_MAX − t _{ADC _CNV} ^{, 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).
6) For external temperature measurement, the ADC sample time is fixed. Changing ADCSR[2:0] changes the ADC idle time.
( ) ^{7) The parameter t}ADC_IDLE ^{is calculated using the formula:} t _{ADC _IDLE} = 2ⁿ SR_MAX − t _{ADC _SMP _TM} − t _{ADC _CNV} ^{, 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
All other ADC
conversions
tADC_STL
tCCNV
tSCNV
tADC_SMP
tADC_CNV
Ext. temperature
ADC conversion
tADC_STL
tCCNV_TM
tSCNV_TM
tADC_IDLE
tADC_SMP_TM
tADC_CNV
© 2016 Integrated Device Technology, Inc.
23
January 26, 2016