PIC16LF723A-I/ML Microchip Technology, PIC16LF723A-I/ML Datasheet - Page 94

• Manufacturer Part Number: PIC16LF723A-I/ML
• Description: MCU PIC 3.5K FLASH XLP 28-QFN
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16LF723A-I/ML

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Number Of I /o: 25
• Program Memory Type: FLASH
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 11x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• Controller Family/series: PIC16LF
• No. Of I/o's: 25
• Ram Memory Size: 192Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

PIC16F/LF722A/723A
9.3
For the ADC to meet its specified accuracy, the charge
holding capacitor (C
charge to the input channel voltage level. The Analog
Input model is shown in Figure 9-3. The source imped-
ance (R
impedance directly affect the time required to charge
the capacitor C
impedance varies over the device voltage (V
to Figure 9-3. The maximum recommended imped-
ance for analog sources is 10 k. As the source
EQUATION 9-1:
DS41417A-page 94
The value for T
Solving for T
Therefore:
Note 1: The reference voltage (V
Assumptions:
V
V
V
Note: Where n = number of bits of the ADC.
S
2: The charge holding capacitor (C
3: The maximum recommended impedance for analog sources is 10 k. This is required to meet the pin
A/D Acquisition Requirements
) and the internal sampling switch (R
AP P LI ED
AP P LI ED
AP P LI ED
leakage specification.
T
ACQ
T
C
ACQ
T
:
HOLD
C
C








=
Temperature
can be approximated with the following equations:
=
=
=
=
1
1 e
1 e
HOLD
=
=
=
. The sampling switch (R
ACQUISITION TIME EXAMPLE
2µs
4.42µs
–
–
–
1.12
–
–
Amplifier Settling Time
T
2µs
C
10pF 1k
--------------------------

AMP
) must be allowed to fully
2
–
--------- -
–
-------- -
HOLD
RC
RC
+
µs
T
Tc
n
+
C
1.12µs
+







+
1
T
1

C
 1
=
R
=
T

+
IC
C
–
=
V
V
+
+
+

REF
+

A PP LIE D


CHOLD
7k
50°C and external impedance of 10k
Temperature - 25°C
T

R

) has no effect on the equation, since it cancels itself out.
COFF

50°C- 25°C
=
SS
+
+
HOLD
DD
V
10k
CHOLD
R
), refer


S
1
+
 ln(1/511)
) is not discharged after each conversion.

SS
SS
–
Hold Capacitor Charging Time

)
)
 0.05µs/°C
--------------------------

ln(0.001957)

2
n
+
 0.05µs/°C
1
1

 1
impedance is decreased, the acquisition time may be
decreased. After the analog input channel is selected
(or changed), an A/D acquisition must be done before
the conversion can be started. To calculate the mini-
mum acquisition time, Equation 9-1 may be used. This
equation assumes that 1/2 LSb error is used (256 steps
for the ADC). The 1/2 LSb error is the maximum error
allowed for the ADC to meet its specified resolution.
–




;[1] V
;[2] V
;combining [1] and [2]



CHOLD
CHOLD
5.0V V
+
charged to within 1/2 lsb
charge response to V
DD
Temperature Coefficient
 2010 Microchip Technology Inc.
APPLIED