PIC14000-04I/SS Microchip Technology, PIC14000-04I/SS Datasheet - Page 66

• Manufacturer Part Number: PIC14000-04I/SS
• Description: IC, 8BIT MCU, PIC14, 4MHZ, SSOP-28
• Manufacturer: Microchip Technology

Specifications of PIC14000-04I/SS

• Controller Family/series: PIC14
• No. Of I/o's: 22
• Ram Memory Size: 192Byte
• Cpu Speed: 4MHz
• No. Of Timers: 2
• Interface: I2C
• Digital Ic Case Style: SSOP
• Core Size: 8 Bit
• Program Memory Size: 4096 X 14
• Embedded Interface Type: I2C
• Rohs Compliant: Yes
• Processor Series: PIC14000
• Core: PIC
• Data Bus Width: 8 bit
• Program Memory Type: EPROM
• Data Ram Size: 192 B
• Interface Type: SPI, UART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 1
• Operating Supply Voltage: 2.7 V to 6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SSOP-28
• Development Tools By Supplier: ICE2000
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 14 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC14000
FIGURE 9-1:
9.3
The slope reference voltage divider circuit, consisting
of a buffer amplifier and resistor divider, is connected to
the internal bandgap reference producing two other
voltage references called SREFHI and SREFLO (see
Figure 9-2). SREFHI is nominally the same as the
bandgap voltage, 1.2V, and SREFLO is nominally
0.13V. These reference voltages are available on two
of the analog multiplexer channels. The A/D module
and firmware can measure the SREFHI and SREFLO
voltages, and in conjunction with the K
ibration data correct for the A/D's offset and slope
errors. See AN624 for further details.
DS40122B-page 66
ADZERO
(ADCON<0>)
LSOFF
(SLPCON<4>)
Slope Reference Voltage Divider
Input Protection
Diodes
RA1/AN1
RD5/AN5
LEVEL-SHIFT NETWORKS
V
DD
REF
*
and K
*These switches are a matched pair
(SLPCON<4>)
LSOFF
BG
cal-
Preliminary
*
(nominal)
100 k
9.4
The internal temperature sensor is connected to the
channel 7 input of the A/D converter. The sensor volt-
age is 1.05V nominal at 25 C and its temperature coef-
ficient is approximately 3.7mV/ C. The sensor voltage
at 25 C and the temperature coefficient values are
stored in the calibration space EPROM (See
Table 4-2). To enable the temperature sensor, the
TEMPOFF bit (SLPCON<1>) must be cleared.
V
DD
Internal Temperature Sensor
5 A (nominal)
1996 Microchip Technology Inc.
To A/D mux,
programmable
reference
comparators
External
Capacitor
(Optional)
SUM
RA1/AN1 only