Z8F042AHJ020SG Datasheet, PDF (254/282 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F082A Series
Product Specification
237
Table 139. Analog-to-Digital Converter Electrical Characteristics and Timing (Continued)
V_DD = 3.0 V to 3.6 V
T_A = 0°C to +70°C
(unless otherwise stated)
Symbol Parameter
Minimum Typical Maximum Units Conditions
Continuous Conversion
–
256
–
Sys- All measurements but
Time
tem temperature sensor
clock
cycles
512
Temperature sensor
measurement
Signal Input Bandwidth
–
10
kHz As defined by -3 dB
point
R_S
Analog Source
Impedance⁴
–
–
10
k In unbuffered mode
500
k In buffered modes
Zin
Input Impedance
–
150
k In unbuffered mode at
20 MHz⁵
10
–
M In buffered modes
Vin
Input Voltage Range
0
0.3
V_DD
V_DD–1.1
V Unbuffered Mode
V Buffered Modes
These values define
the range over which
the ADC performs
within spec; exceeding
these values does not
cause damage or insta-
bility; see DC Charac-
teristics for absolute
pin voltage limits.
Notes:
1. Analog source impedance affects the ADC offset voltage (because of pin leakage) and input settling time.
2. Devices are factory calibrated at V_DD = 3.3V and T_A = +30°C, so the ADC is maximally accurate under these
conditions.
3. LSBs are defined assuming 10-bit resolution.
4. This is the maximum recommended resistance seen by the ADC input pin.
5. The input impedance is inversely proportional to the system clock frequency.
PS022827-1212
P R E L I M I N A R Y On-Chip Peripheral AC and DC Electrical