C8051F320DK Silicon Laboratories Inc, C8051F320DK Datasheet - Page 45
![DEV KIT FOR C8051F320/F321](/photos/9/20/92068/c8051f320dk_sml.jpg)
C8051F320DK
Manufacturer Part Number
C8051F320DK
Description
DEV KIT FOR C8051F320/F321
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F320DK
Contents
Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
Processor To Be Evaluated
C8051F320/F321
Interface Type
USB
Silicon Manufacturer
Silicon Labs
Core Architecture
8051
Silicon Core Number
C8051F320
Silicon Family Name
C8051F32x
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
Silicon Laboratories C8051F320, C8051F321
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1260
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F320DK
Manufacturer:
SiliconL
Quantity:
4
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5.3.3. Settling Time Requirements
When the ADC0 input configuration is changed (i.e., a different AMUX0 selection is made), a minimum
tracking time is required before an accurate conversion can be performed. This tracking time is determined
by the AMUX0 resistance, the ADC0 sampling capacitance, any external source resistance, and the accu-
racy required for the conversion. Note that in low-power tracking mode, three SAR clocks are used for
tracking at the start of every conversion. For most applications, these three SAR clocks will meet the mini-
mum tracking time requirements.
Figure 5.5 shows the equivalent ADC0 input circuits for both Differential and Single-ended modes. Notice
that the equivalent time constant for both input circuits is the same. The required ADC0 settling time for a
given settling accuracy (SA) may be approximated by Equation 5.1. When measuring the Temperature
Sensor output or VDD with respect to GND, R
settling time requirements.
Where:
SA is the settling accuracy, given as a fraction of an LSB (for example, 0.25 to settle within 1/4 LSB)
t is the required settling time in seconds
R
n is the ADC resolution in bits (10).
TOTAL
is the sum of the AMUX0 resistance and any external source resistance.
Px.x
Px.x
RC
Differential Mode
MUX Select
Input
Select
MUX
= R
Equation 5.1. ADC0 Settling Time Requirements
MUX
R
R
Figure 5.5. ADC0 Equivalent Input Circuits
* C
MUX
MUX
SAMPLE
= 5k
= 5k
t
=
C
C
ln
SAMPLE
SAMPLE
------ -
SA
2
= 5pF
= 5pF
n
TOTAL
Rev. 1.4
R
TOTAL
reduces to R
C
Px.x
SAMPLE
Single-Ended Mode
RC
MUX
MUX Select
Input
= R
. See Table 5.1 for ADC0 minimum
MUX
R
* C
MUX
SAMPLE
= 5k
C8051F320/1
C
SAMPLE
= 5pF
45
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