PIC14000T-04/SS Microchip Technology, PIC14000T-04/SS Datasheet - Page 66

• Manufacturer Part Number: PIC14000T-04/SS
• Description: IC MCU OTP 4KX14 A/D 28SSOP
• Manufacturer: Microchip Technology
• Series: PIC® 14r

Specifications of PIC14000T-04/SS

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: I²C
• Peripherals: POR, Temp Sensor, WDT
• Number Of I /o: 20
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: OTP
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 6 V
• Data Converters: Slope A/D
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SSOP
• Processor Series: PIC14000
• Core: PIC
• Data Bus Width: 8 bit
• 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: + 70 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ICE2000
• Minimum Operating Temperature: 0 C
• On-chip Adc: 14 bit
• For Use With: 309-1025 - ADAPTER 28-SSOP TO 28-DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

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