Справочник Пользователя для IBM EM78P259N/260N
EM78P259N/260N
8-Bit Microprocessor with OTP ROM
74
•
Product Specification (V1.2) 05.18.2007
(This specification is subject to change without further notice)
8.1 AD Converter Characteristics
Vdd=2.5V to 5.5V, Vss=0V, Ta=25°C
Symbol
Parameter
Condition
Min.
Typ.
Max.
Unit
V
AREF
2.5 – Vdd V
V
ASS
Analog reference voltage
V
AREF
- V
ASS
≥ 2.5V
Vss –
Vss V
VAI
Analog input voltage
–
V
ASS
– V
AREF
V
Ivdd 750
850
1000
uA
IAI1
Ivref
Analog supply current
Vdd=V
AREF
=5.0V, V
ASS
=0.0V
(V reference from Vdd)
–10 0 +10 uA
Ivdd 500
600
820
uA
IAI2
IVref
Analog supply current
Vdd=V
AREF
=5.0V, V
ASS
=0.0V
(V reference from VREF)
200 250 300 uA
IOP OP
current
Vdd=5.0V, OP used
Output voltage swing 0.2V to 4.8V
Output voltage swing 0.2V to 4.8V
450 550 650 uA
RN1 Resolution
VREFS=0, Internal VDD
VDD=5.0V, VSS = 0.0V
− 9 10
Bits
RN2 Resolution
VREFS=1, External VREF
VDD=VREF=5.0V, VSS = 0.0V
VDD=VREF=5.0V, VSS = 0.0V
− 11 12 Bits
LN1
Linearity error
Vdd = 2.5 to 5.5V Ta=25
°C
0
±4
±8
LSB
LN2
Linearity error
VDD= 2.5 to 5.5V Ta=25
°C
0
±2
±4
LSB
DNL
Differential nonlinear error
Vdd = 2.5 to 5.5V Ta=25
°C
0
±0.5
±0.9
LSB
FSE1 Full
scale
error
Vdd=V
AREF
=5.0V, V
ASS
=0.0V
±0
±4
±8
LSB
FSE2
Full scale error
VDD=VREF=5.0V, VSS = 0.0V
±0
±2
±4
LSB
OE Offset
error
Vdd=V
AREF
=5.0V, V
ASS
=0.0V
±0
±2
±4
LSB
ZAI
Recommended impedance of
analog voltage source
analog voltage source
– 0
8
10
K
Ω
TAD
ADC clock period
Vdd=V
AREF
=5.0V, V
ASS
=0.0V
4
–
–
μs
TCN AD
conversion
time
Vdd=V
AREF
=5.0V, V
ASS
=0.0V 15 – 15
TAD
ADIV
ADC OP input voltage range Vdd=V
AREF
=5.0V, V
ASS
=0.0V
0
–
V
AREF
V
0 0.2 0.3
ADOV
ADC OP output voltage swing
Vdd=V
AREF
=5.0V, V
ASS
=0.0V,RL=10KΩ
4.7 4.8 5
V
ADSR
ADC OP slew rate
Vdd=V
AREF
=5.0V, V
ASS
=0.0V
0.1
0.3
–
V/us
TAD
A/D clock period
VDD=VREF=5.0V, VSS = 0.0V
4
−
− µs
TCN A/D
conversion
time
VDD=VREF=5.0V, VSS = 0.0V
15
− 15
TAD
PSR Power
Supply
Rejection
Vdd=5.0V±0.5V
±0 – ±2 LSB
Note:
1. These parameters are hypothetical, have not been tested and are provided for design reference only.
2. There is no current consumption when ADC is off other than minor leakage current.
3. AD conversion result will not decrease when an increase of input voltage and no missing code will result.