C8051F336-GMR Silicon Laboratories Inc, C8051F336-GMR Datasheet - Page 40

Microcontrollers (MCU) 16KB 10ADC 10DAC 768Ram MCU Lead Free

C8051F336-GMR

Manufacturer Part Number
C8051F336-GMR
Description
Microcontrollers (MCU) 16KB 10ADC 10DAC 768Ram MCU Lead Free
Manufacturer
Silicon Laboratories Inc
Datasheet

Specifications of C8051F336-GMR

Processor Series
C8051F3x
Core
8051
Data Bus Width
8 bit
Program Memory Type
Flash
Program Memory Size
16 KB
Data Ram Size
768 B
Interface Type
I2C, SPI, UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
17
Number Of Timers
4
Operating Supply Voltage
2.7 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
QFN-20
3rd Party Development Tools
KSK-SL-TOOLSTICK, PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F336DK
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit
On-chip Dac
10 bit
Package
20QFN
Device Core
8051
Family Name
C8051F336
Maximum Speed
25 MHz
Ram Size
768 Byte
Operating Temperature
-40 to 85 °C
Lead Free Status / Rohs Status
 Details

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0
C8051F336/7/8/9
7.2.3. Settling Time Requirements
A minimum tracking time is required before each conversion to ensure that an accurate conversion is per-
formed. This tracking time is determined by any series impedance, including the AMUX0 resistance, the
the ADC0 sampling capacitance, and the accuracy 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 many applica-
tions, these three SAR clocks will meet the minimum tracking time requirements.
Figure 7.3 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 7.1. When measuring the Temperature
Sensor output or V
teristics” on page 27
sampling capacitor values.
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).
40
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
MUX
with respect to GND, R
Equation 7.1. ADC0 Settling Time Requirements
for ADC0 minimum settling time requirements as well as the mux impedance and
* C
R
R
Figure 7.3. ADC0 Equivalent Input Circuits
SAMPLE
MUX
MUX
t
=
ln
C
C
SAMPLE
SAMPLE
------ -
SA
2
n
TOTAL
×
R
Rev.1.0
TOTAL
reduces to R
C
Px.x
SAMPLE
MUX
Single-Ended Mode
RC
MUX Select
Input
. See
= R
MUX
Section “6. Electrical Charac-
* C
R
SAMPLE
MUX
C
SAMPLE

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