參數(shù)資料
型號: ST7285C
廠商: 意法半導(dǎo)體
英文描述: 8-BIT MCU FOR RDS WITH 48K ROM, 3K RAM, ADC, TWO TIMERS, TWO SPIs, I2C AND SCI INTERFACES
中文描述: 8位微控制器48,000鐵路發(fā)展策略光盤,3K內(nèi)存,ADC,兩個定時器,2個SPI,I2C和脊髓損傷接口
文件頁數(shù): 109/117頁
文件大?。?/td> 748K
代理商: ST7285C
109/117
ST72E85 ST72T85
2.3 DC ELECTRICAL CHARACTERISTICS
(T
A
= -40 to +85
°
C unless otherwise specified)
Note:
All voltages are referred to V
SS
unless otherwise specified.
Note
: At 85
°
C and V
DD
= 5.5V, code 255 is missing.
Note
*)
:
The 3rd harmonic (57KHz) must be less than -40dB with respect to the input signal plus gain
GENERAL
Symbol
Parameter
Conditions
Min
4.5
3.0
Typ.
Max
5.5
6.0
Unit
V
DD
Supply Voltage
RDS Filter operational
Without RDS filter capability
V
STANDARD I/O PORT PINS
Symbol
V
IL
Input Low Level Voltage
V
IH
Input High Level Voltage
Parameter
Conditions
Min
-
Typ
-
-
-
-
-
-
-
-
-
-
30
30
Max
0.3xV
DD
-
0.5
0.3
1.0
0.4
-
-
10
250
-
-
Unit
V
V
V
V
V
V
V
V
μ
A
KW
ns
ns
0.7xV
DD
-
-
-
-
3.1
3.4
-10
40
-
-
V
OL
Output Low Level Voltage
I=-5mA
I=-1.6mA
I=-5mA
I=-1.6mA
I=5mA
I=1.6mA
V
SS
<V
PIN
<V
DD
V
IN
=V
SS
C
l
=50pF
C
l
=50pF
V
OL
Output Low Level Voltage on pins
PH3, PH4, PH5
V
OH
Output High Level Voltage
I
L
Input Leakage Current
Pull-up Equivalent Resistance
Output H-L Fall Time
Output L-H Rise Time
I
RPU
T
ohl
T
olh
A/D CONVERTER
Symbol
Val
Terr
Tcon
Rva
Parameter
Conditions
Min
Typ
8
Max
Unit
bit
LSB
μ
s
K
Resolution
Total Error
Conversion Time
Analog Source Impedance
f
OSC
= 8 MHz
f
OSC
= 8 MHz
f
OSC
= 8 MHz
±
2
16
-
10
RDS FILTER
Symbol
f
C
BW
G
Parameter
Conditions
Min
56.5
2.5
18
Typ
57
3
20
22
80
50
160
Max
57.5
3.5
22
Unit
KHz
KHz
dB
Center Frequency
3dB Bandwidth
Gain
V
IN
: 3mV rms
@ 57 KHz
f =
±
4KHz
f = 38KHz
f = 67KHz
A
Attenuation
50
35
100
1
dB
R
I
R
L
S/N
V
IN
V
REF
Input Impedance of MPX
Load Impedance of FILOUT
Signal to Noise Ratio
MPX input signal
Reference
200
K
M
dB
V
IN
= 3mV
RMS
f = 19KHz, T3
40
dB
*)
40
250
V
DD
/2
170
600
mV
RMS
V
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