Philips CEM2100/00, Руководство по обслуживанию

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Page 272
22. Electrical Characteristics
22.1 Absolute Maximum Ratings
T
5CL8
22.4 AD Characteristics
Note 1: The total error includes all errors except a quanitization error, and is defined as a maximum deviation from the ideal con-
version line.
Note 2: Conversion time is defferent in recommended value by power supply voltage.
Note 3: The voltage to be input on the AIN input pin must not exceed the range between V
AREF
and V
SS
. If a voltage outside this
range is input, conversion values will become unstable and conversion values of other channels will also be affected.
Note 4: Analog reference voltage range:
∆
V
AREF
= V
AREF
- V
SS
Note 5: When AD converter is not used, fix the AVDD and VAREF pin on the V
DD
level.
(V
SS
= 0.0 V, 4.5 V
≤
V
DD
≤
5.5 V, Topr = -40 to 85
°
C)
Paramete Symbol Condition Min Typ. Max Unit
Analog reference voltage
V
AREF
A
VDD
- 1.0
–
A
VDD
V
Power supply voltage of analog control
circuit
A
VDD
V
DD
Analog reference voltage range (Note 4)
∆
V
AREF
3.5 – –
Analog input voltage
V
AIN
V
SS
–
V
AREF
Power supply current of analog refer-
ence voltage
I
REF
V
DD
= A
VDD
= V
AREF
= 5.5 V
V
SS
= 0.0 V
– 0.6 1.0 mA
Non linearity error
V
DD
= A
VDD
= 5.0 V,
V
SS
= 0.0 V
V
AREF
= 5.0 V
– – ±2
LSB
Zero point error – – ±2
Full scale error – – ±2
Total error – – ±2
(V
SS
= 0 V, 2.7 V
≤
V
DD
<
4.5 V, Topr = -40 to 85
°
C)
Parameter Symbol Condition Min Typ. Max Unit
Analog reference voltage
V
AREF
A
VDD
- 1.0
–
A
VDD
V
Power supply voltage of analog control
circuit
A
VDD
V
DD
Analog reference voltage range (Note 4)
∆
V
AREF
2.5 – –
Analog input voltage
V
AIN
V
SS
–
V
AREF
Power supply current of analog refer-
ence voltage
I
REF
V
DD
= A
VDD
= V
AREF
= 4.5 V
V
SS
= 0.0 V
– 0.5 0.8 mA
Non linearity error
V
DD
= A
VDD
= 2.7 V
V
SS
= 0.0 V
V
AREF
= 2.7 V
– – ±2
LSB
Zero point error – – ±2
Full scale error – – ±2
Total error – – ±2