PIC16LF876-04I/SO Microchip Technology, PIC16LF876-04I/SO Datasheet - Page 116

• Manufacturer Part Number: PIC16LF876-04I/SO
• Description: IC MCU FLASH 8KX14 EE A/D 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16LF876-04I/SO

• Core Size: 8-Bit
• Program Memory Size: 14KB (8K x 14)
• Core Processor: PIC
• Speed: 4MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 368 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Controller Family/series: PIC16LF
• No. Of I/o's: 22
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 368Byte
• Cpu Speed: 4MHz
• No. Of Timers: 3
• Processor Series: PIC16LF
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 368 B
• Interface Type: MSSP, PSP, USART
• Maximum Clock Frequency: 4 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 1
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163022, DV164120
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 5 Channel
• Package: 28SOIC W
• Device Core: PIC
• Family Name: PIC16
• Maximum Speed: 4 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

PIC16F87X
11.1
For the A/D converter to meet its specified accuracy,
the charge holding capacitor (C
to fully charge to the input channel voltage level. The
analog input model is shown in Figure 11-2. The source
impedance (R
impedance directly affect the time required to charge
the capacitor C
impedance varies over the device voltage (V
Figure 11-2. The maximum recommended imped-
ance for analog sources is 10 k . As the impedance
is decreased, the acquisition time may be decreased.
EQUATION 11-1:
FIGURE 11-2:
DS30292C-page 114
T
T
T
ACQ
C
ACQ
Note 1: The reference voltage (V
A/D Acquisition Requirements
2: The charge holding capacitor (C
3: The maximum recommended impedance for analog sources is 10 k . This is required to meet the pin leak-
4: After a conversion has completed, a 2.0T
=
=
=
=
=
=
=
=
age specification.
During this time, the holding capacitor is not connected to the selected A/D input channel.
Amplifier Settling Time +
Hold Capacitor Charging Time +
Temperature Coefficient
T
2 s + T
C
- 120pF (1k + 7k + 10k ) In(0.0004885)
16.47 s
2 s + 16.47 s + [(50°C -25 C)(0.05 s/ C)
19.72 s
S
AMP
HOLD
) and the internal sampling switch (R
Legend C
HOLD
+ T
C
(R
VA
C
+ [(Temperature -25°C)(0.05 s/°C)]
. The sampling switch (R
ACQUISITION TIME
ANALOG INPUT MODEL
IC
+ T
V
I
R
SS
C
R
+ R
LEAKAGE
PIN
T
IC
HOLD
S
COFF
SS
ANx
+ R
C
5 pF
HOLD
PIN
= input capacitance
= threshold voltage
= leakage current at the pin due to
= interconnect resistance
= sampling switch
= sample/hold capacitance (from DAC)
S
) In(1/2047)
various junctions
) must be allowed
REF
) has no effect on the equation, since it cancels itself out.
HOLD
V
DD
DD
), see
V
V
) is not discharged after each conversion.
T
T
SS
SS
= 0.6V
= 0.6V
)
)
AD
delay must complete before acquisition can begin again.
I
± 500 nA
LEAKAGE
After the analog input channel is selected (changed),
this acquisition must be done before the conversion
can be started.
To
Equation 11-1 may be used. This equation assumes
that 1/2 LSb error is used (1024 steps for the A/D). The
1/2 LSb error is the maximum error allowed for the A/D
to meet its specified resolution.
To calculate the minimum acquisition time, T
the
(DS33023).
R
IC
calculate
PICmicro™
1k
V
SS R
DD
Sampling
Switch
6V
5V
4V
3V
2V
SS
the
Mid-Range
Sampling Switch
5 6 7 8 9 10 11
V
minimum
C
= DAC capacitance
= 120 pF
SS
(k )
HOLD
2001 Microchip Technology Inc.
Reference
acquisition
ACQ
Manual
, see
time,