C8051F310-GQR Silicon Laboratories Inc, C8051F310-GQR Datasheet - Page 56
![no-image](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_sml.jpg)
C8051F310-GQR
Manufacturer Part Number
C8051F310-GQR
Description
IC 8051 MCU 16K FLASH 32LQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F31xr
Specifications of C8051F310-GQR
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
POR, PWM, Temp Sensor, WDT
Number Of I /o
29
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 21x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-LQFP
For Use With
336-1445 - ADAPTER PROGRAM TOOLSTICK F310336-1329 - KIT REF DESIGN SENSORLESS BLDC336-1253 - DEV KIT FOR C8051F310/F311
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F310-GQR
Manufacturer:
SILICON
Quantity:
3 300
Company:
Part Number:
C8051F310-GQR
Manufacturer:
SILICON41
Quantity:
120
Company:
Part Number:
C8051F310-GQR
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
Part Number:
C8051F310-GQR
Manufacturer:
SILICON LABS/芯科
Quantity:
20 000
C8051F310/1/2/3/4/5/6/7
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. 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 minimum 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 V
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).
56
TOTAL
is the sum of the AMUX0 resistance and any external source resistance.
Px.x
Px.x
RC
Differential Mode
MUX Select
MUX Select
Input
DD
= R
Equation 5.1. ADC0 Settling Time Requirements
with respect to GND, R
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. 1.7
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
C
SAMPLE
= 5pF