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ST7285C Datasheet(HTML) 88 Page - STMicroelectronics

Part No. ST7285C
Description  8-BIT MCU FOR RDS WITH 48K ROM, 3K RAM, ADC, TWO TIMERS, TWO SPIs, I2C AND SCI INTERFACES
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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ST7285C Datasheet(HTML) 88 Page - STMicroelectronics

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ST7285C
6.3 DC ELECTRICAL CHARACTERISTICS
(TA = -40 to +85
°C unless otherwise specified)
Note: All voltages are referred to VSS unless otherwise specified.
Note:At85
°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
STANDARD I/O PORT PINS
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIL
Input Low Level Voltage
-
-
0.3xV
DD
V
VIH
Input High Level Voltage
0.7xV
DD
--
V
VOL
Output Low Level Voltage
I=-5mA
-
-
0.5
V
I=-1.6mA
-
-
0.3
V
VOL
Output Low Level Voltage on pins
PH3, PH4, PH5
I=-5mA
-
-
1.0
V
I=-1.6mA
-
-
0.4
V
VOH
Output High Level Voltage
I=5mA
3.1
-
-
V
I=1.6mA
3.4
-
-
V
IL
Input Leakage Current
VSS<VPIN<VDD
-10
-
10
µA
IRPU
Pull-up Equivalent Resistance
VIN=VSS
40
-
250
KW
Tohl
Output H-L Fall Time
Cl=50pF
-
30
-
ns
Tolh
Output L-H Rise Time
Cl=50pF
-
30
-
ns
GENERAL
Symbol
Parameter
Condition s
Min
Typ.
Max
Unit
VDD
Supply Voltage
RDS Filter operational
4.5
5.5
V
Without RDS filter capability
3.0
6.0
A/D CONVERTER
Symbol
Parameter
Condit ions
Min
Typ
Max
Unit
Val
Resolution
f
OSC = 8 MHz
8
bit
Terr
Total Error
f
OSC =8 MHz
± 2
LSB
Tcon
Conversion Time
f
OSC =8 MHz
16
µs
Rva
Analog Source Impedance
-
10
K
RDS FILTER
Symbol
Parameter
Condit ions
Min
Typ
Max
Unit
fC
Center Frequency
56.5
57
57.5
KHz
BW
3dB Bandwidth
VIN: 3mV rms
2.5
3
3.5
KHz
G
Gain
@ 57 KHz
18
20
22
dB
A
Attenuation
∆f= ±4KHz
f = 38KHz
f = 67KHz
50
35
22
80
50
dB
RI
Input Impedance of MPX
100
160
200
K
RL
Load Impedance of FILOUT
1
M
S/N
Signal to Noise Ratio
VIN = 3mVRMS
40
dB
VIN
MPX input signal
f = 19KHz, T3
≤ 40 dB *)
170
250
600
mVRMS
VREF
Reference
VDD/2
V


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