C8051F021-GQ Silicon Laboratories Inc, C8051F021-GQ Datasheet - Page 62

IC 8051 MCU 64K FLASH 64TQFP

C8051F021-GQ

Manufacturer Part Number
C8051F021-GQ
Description
IC 8051 MCU 64K FLASH 64TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F02xr
Datasheets

Specifications of C8051F021-GQ

Program Memory Type
FLASH
Program Memory Size
64KB (64K x 8)
Package / Case
64-TQFP, 64-VQFP
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
32
Ram Size
4.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x8b, 8x12b; D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
C8051F0x
Core
8051
Data Bus Width
8 bit
Data Ram Size
4.25 KB
Interface Type
I2C/SMBus/SPI/UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
32
Number Of Timers
4
Operating Supply Voltage
2.7 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F020DK
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 8-bit or 8-ch x 12-bit
On-chip Dac
2-ch x 12-bit
No. Of I/o's
32
Ram Memory Size
4352Byte
Cpu Speed
25MHz
No. Of Timers
5
No. Of Pwm Channels
5
Rohs Compliant
Yes
Data Rom Size
64 KB
A/d Bit Size
12 bit
A/d Channels Available
8
Height
1.05 mm
Length
10 mm
Supply Voltage (max)
3.6 V
Supply Voltage (min)
2.7 V
Width
10 mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
336-1200 - DEV KIT FOR F020/F021/F022/F023
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1201

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
C8051F021-GQ
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
Part Number:
C8051F021-GQ
Manufacturer:
SILICON
Quantity:
1 400
Price:
1.00 USD
Part Number:
C8051F021-GQR
Manufacturer:
SiliconL
Quantity:
2 000
Part Number:
C8051F021-GQR
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
Part Number:
C8051F021-GQR
Manufacturer:
SILICON
Quantity:
22
Price:
1.00 USD
C8051F022/3
6.2.3. Settling Time Requirements
When the ADC0 input configuration is changed (i.e., a different MUX or PGA selection is made), a minimum settling
(or tracking) time is required before an accurate conversion can be performed. This settling time is determined by the
ADC0 MUX resistance, the ADC0 sampling capacitance, any external source resistance, and the accuracy required
for the conversion. Figure 6.4 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 settling time for a
given settling accuracy (SA) may be approximated by Equation 6.1. When measuring the Temperature Sensor output,
R
every conversion. For most applications, these three SAR clocks will meet the settling time requirements. See
Table 6.1 on page 74 for minimum settling/tracking 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).
62
TOTAL
TOTAL
AIN0.x
AIN0.y
reduces to R
is the sum of the ADC0 MUX resistance and any external source resistance.
RC
Differential Mode
MUX Select
MUX Select
Input
= R
MUX
MUX
R
R
* C
. Note that in low-power tracking mode, three SAR clocks are used for tracking at the start of
MUX
MUX
SAMPLE
Equation 6.1. ADC0 Settling Time Requirements
= 5k
= 5k
Figure 6.4. ADC0 Equivalent Input Circuits
t
C
C
SAMPLE
SAMPLE
=
ln
= 10pF
= 10pF
------ -
SA
2
n
Rev. 1.4
R
TOTAL
AIN0.x
C
SAMPLE
Single-Ended Mode
RC
MUX Select
Input
= R
MUX
R
* C
MUX
SAMPLE
= 5k
C
SAMPLE
= 10pF

Related parts for C8051F021-GQ