FM3 MB9B500 Series - Microcontrollers - Fujitsu

12bit A/D Converter
This chapter shows the electrical characteristics for the A/D converter.
MB9B500 Series
1. Electrical characteristics for the A/D converter.
(Vcc = AVcc = 2.7V to 5.5V, Vss = AVss = 0V Ta = - 40C to + 85C)
Parameter
Pin
name Min
Value
Typ Max
Unit Remarks
Resolution - - - 12 bit
Linearity error - - 4.5 - + 4.5 LSB
Differential linearity
error
- -2.5 - + 2.5 LSB
Zero transition voltage
AN0
to AN15
- 20 - + 20 mV
AVRH = 2.7V to 5.5V
Full transition voltage
AN0
to AN15
- 20 - + 20 mV
Conversion time - 1.0 (*1) - - μs AVcc 4.5V
Sampling time Ts
*2
*2
-
-
-
-
ns
AVcc 4.5V
AVcc < 4.5V
Compare clock cycle *3 Tcck
55.5
166.7
- 10000 ns
AVcc 4.5V
AVcc < 4.5V
State transition time to
operation permission
Tstt 2.5 - - μs
Power supply current
(analog + digital)
AVCC
-
-
2.3
0.1
3.6
2
mA
μA
A/D 1unit operation
When XSTB is 0 (3unit)
Reference power supply
current
(between AVRH to
AVSS)
AVRH
-
-
2.2
0.03
3.0
0.6
mA
μA
A/D 1unit operation
AVRH=5.5V
When XSTB is 0 (3unit)
Analog input capacity Cin - - 14.5 pF
Analog input resistance Rin - -
0.93
2.04
kΩ
AVcc 4.5V
AVcc < 4.5V
Interchannel disparity - - - 4 LSB
Analog port input
current
AN0
to AN15
- - 5 μA
Analog input voltage
AN0
to AN15
AVSS - AVRH V
Reference voltage AVRH AVSS - AVCC V
*1: Conversion time is the value of sampling time(Ts) + compare time(Tc).
The condition of the minimum conversion time is when HCLK=72MHz, the value of sampling time: 0.222μs,
the value of sampling time: 778ns (AVcc 4.5V)
Ensure that it satisfies the value of sampling time(Ts) and compare clock cycle (Tcck).
For setting of sampling time and compare clock cycle, see chapter "12-bit A/D Converter" in "Peripheral
Manual"
*2: A necessary sampling time changes by external impedance.
Ensure that it set the sampling time to satisfy (Equation 1)
*3: Compare time (Tc) is the value of (Equation 2)
DS706-00010-1v0-E
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