Z8F011ASH020EG2156 ZiLOG, Z8F011ASH020EG2156 Datasheet - Page 116

• Manufacturer Part Number: Z8F011ASH020EG2156
• Description: 8-bit Microcontrollers - MCU 1K FLASH 256B RAM 16B NVDS
• Manufacturer: ZiLOG

Specifications of Z8F011ASH020EG2156

• Rohs: yes
• Core: eZ8
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 20 MHz
• Program Memory Size: 1 KB
• Data Ram Size: 256 B
• On-chip Adc: No
• Package / Case: SOIC-20
• Mounting Style: SMD/SMT
• Interface Type: UART
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 17
• Number Of Timers: 2
• Program Memory Type: Flash
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 2.7 V

Analog-to-Digital Converter
PS025113-1212
Architecture
The Z8 Encore! MCU includes an eight-channel Successive Approximation Register
(SAR) Analog-to-Digital Converter (ADC). The ADC converts an analog input signal to a
10-bit binary number. The features of the SAR ADC include:
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•
•
•
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The ADC architecture, displayed in Figure 11, consists of an 8-input multiplexer, sample-
and-hold amplifier and 10-bit SAR ADC. The ADC digitizes the signal on a selected
channel and stores the digitized data in the ADC data registers. In an environment with
high electrical noise, an external RC filter must be added at the input pins to reduce high-
frequency noise.
where:
Example:
T
T
SCLK = System Clock
T
T
T
T
DIV = 16 (fixed to divide by 16 for F0830 Series products)
T
T
Eight analog input sources multiplexed with general purpose I/O ports
Fast conversion time, less than 11.9 µs
Programmable timing controls
Interrupt on conversion complete
Internal voltage reference generator
Ability to select external reference voltage
When configuring an ADC using external V
package
CONV
CONV
CONV
S
CON
CONV
CONV
H
= Sample time (SCLK * ADCST)
= Hold time (SCLK * ADCSST)
= Conversion time (13 * SCLK * 16)
= T
= T
= Total conversion time
= 1µs + 0.5µs + 13 * SCLK * DIV
= 1 µs + 0.5 µs + 13 * (1/20 MHz) * 16 = 11.9 µs
For an F0830 Series MCU running @ 20 MHz:
S/H
S
+ T
+ T
H
CON
+ 13 * SCLK * 16
REF
, PB5 is used as V
Z8 Encore!
Analog-to-Digital Converter
Product Specification
REF
®
in the 28-pin
F0830 Series
98