MCF52236AF50 Freescale Semiconductor, MCF52236AF50 Datasheet - Page 41

• Manufacturer Part Number: MCF52236AF50
• Description: IC MCU 32BIT 256K FLASH 80-LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF5223xr

Specifications of MCF52236AF50

• Core Processor: Coldfire V2
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: Ethernet, I²C, SPI, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 56
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x12b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 80-LQFP
• Processor Series: MCF522x
• Core: ColdFire V2
• Data Bus Width: 32 bit
• Data Ram Size: 32 KB
• Interface Type: I2C, QSPI, UART
• Maximum Clock Frequency: 50 MHz
• Number Of Programmable I/os: 56
• Number Of Timers: 10
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JLINK-CF-BDM26, EWCF
• Development Tools By Supplier: M52235EVB, M52233DEMO
• Minimum Operating Temperature: 0 C
• On-chip Adc: 12 bit, 8 Channel
• A/d Bit Size: 12 bit
• A/d Channels Available: 8
• Height: 1.5 mm
• Length: 14 mm
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 3 V
• Width: 14 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

2.9.1
Figure 10-17 shows the ADC input circuit during sample and hold. S1 and S2 are always open/closed at the same time that S3
is closed/open. When S1/S2 are closed and S3 is open, one input of the sample and hold circuit moves to (V
while the other charges to the analog input voltage. When the switches are flipped, the charge on C1 and C2 are averaged via
S3, with the result that a single-ended analog input is switched to a differential voltage centered about (V
switches switch on every cycle of the ADC clock (open one-half ADC clock, closed one-half ADC clock). There are additional
capacitances associated with the analog input pad, routing, etc., but these do not filter into the S/H output voltage, as S1 provides
isolation during the charge-sharing phase. One aspect of this circuit is that there is an ongoing input current, which is a function
of the analog input voltage, V
Freescale Semiconductor
1
2
3
4
5
6
7
V
V
All measurements were made at V
INL measured from V
LSB = Least Significant Bit
INL measured from V
Includes power-up of ADC and V
ADC clock cycles
The current that can be injected or sourced from an unselected ADC signal input without impacting the performance of the
ADC
I
SINAD
ENOB
Name
SFDR
E
t
VREFH
OFFSET
OFFSET
f
C
SNR
THD
ADPU
t
t
t
R
ADIC
I
REC
ADC
ADS
X
GAIN
ADI
ADI
AD
IN
ADC internal clock
Conversion range
ADC power-up time
Recovery from auto standby
Conversion time
Sample time
Input capacitance
Input impedance
Input injection current
V
Offset voltage internal reference
Gain error (transfer path)
Offset voltage external reference
Signal-to-noise ratio
Total harmonic distortion
Spurious free dynamic range
Signal-to-noise plus distortion
Effective number OF bits
Equivalent Circuit for ADC Inputs
REFH
current
IN
IN
= V
= 0.1V
REF
REFL
,
MCF52235 ColdFire Microcontroller Data Sheet, Rev. 10
Characteristic
5
REFH
and the ADC clock frequency.
7
to V
REF
, per pin
DD
to V
Table 35. ADC Parameters
IN
= 3.3V, V
= V
IN
REFH
= 0.9V
REFH
REFH
= 3.3V, and V
REFL
1
V
(continued)
Min
0.1
REFL
.99
9.1
= ground
—
—
—
—
—
—
—
—
—
—
—
—
—
—
See
See
62 to 66
Typical
Figure 12
Figure 12
10.6
11
–75
3
75
65
—
—
—
6
0
6
1
0
1
Electrical Characteristics
V
Max
1.01
15
REFH
5.0
13
—
—
—
—
—
—
—
—
—
—
—
1
3
REFH
REFH
-V
t
REFL
t
-V
AIC
t
t
AIC
AIC
AIC
REFL
MHz
Unit
Bits
mA
mA
mV
mV
cycles
pF
dB
dB
dB
dB
—
cycles
cycles
cycles
W
)/2. The
V
)/2,
6
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