33784 Datasheet, PDF (8/30 Pages) Freescale Semiconductor, Inc – DSI 2.02 Sensor Interface

ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 4. Dynamic Electrical Characteristics
Characteristics noted under conditions -0.3V ≤ V_BUSIN or V_BUSOUT ≤ 30V, 6.0V ≤ V_{H_CAP} ≤ 30V, - 40°C ≤ T_A ≤ 125°C,
AGND = 0V, unless otherwise noted. Typical values noted reflect the approximate parameter means at T_A = 25°C under nominal
conditions, unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
Internal Oscillator Frequency
f_OSC
9.0
Internal Oscillator Duty Cycle
DC_OSC
45
Initialization to Bus Switches Close
t_BS
–
Communication Data Rate
Loss of Signal Reset Time⁽⁹⁾
Maximum Time for BUSIN to Be Below Frame Threshold
D_RATE
100
t_TO
2.0
ADC Code Conversion Time⁽¹⁰⁾
t_ADC
–
BUSIN Response Current Slew Rate
1.0mA to 9.0mA Transition Rise
9.0mA to 1.0mA Transition Fall
t _{ITR_R}
–
t _{ITR_F}
–
BUSIN Timing to Response Current
BUSIN Negative Voltage Transition = 3.0V to I_RSP = 7.0mA Rise
T_A = -40°C
T_A = +25°C
T_A =+125°C
BUSIN Negative Voltage Transition = 3.0V to I_RSP = 5.0mA Fall
t_{RSP_R}
–
–
–
t_{RSP_F}
–
Bus Signal Duty Cycle⁽⁹⁾
Logic [0] (~ 1/3 + 20%)
Logic [1] (~ 2/3 + 20%)
I/O Transition Time (C_Load = 50pF)⁽⁹⁾
I/O Delay from Input State Change to Status Register Valid⁽⁹⁾
DC_L
25
DC_H
54
t_TRIO
–
t_INDLYIO
–
I/O Delay from DBUS Command to I/O Output State Change
Delay from I/O1 Rising Edge to ADC Value = 3F8⁽⁹⁾
t_OUTDLYIO
–
t_ADCDIS
–
HCAP t_POR Mask
ON (rising edge)
OFF (falling edge)
t_PORMASKHCAP 2.0
(ON)
t_{PORMASKHCAP 1.0}
(OFF)
REGOUT t_POR Mask
ON (rising edge)
OFF (falling edge)
t_PORMASKREG
2.0
OUT(ON)
t_PORMASKREG
1.0
OUT(OFF)
Notes
9. Assured by design.
10. Assured by design. Conversion is started and completed during idle time.
10.0
50
–
–
–
–
–
–
–
–
–
–
33
67
–
–
11.5
–
5.0
3.5
5.0
3.5
11.0
MHz
55
%
50
μs
200
kbps
4.0
ms
20
μs
mA /μs
8.0
8.0
μs
2.5
2.5
3.0
2.5
%
40
80
100
ns
300
ns
15
μs
300
ns
μs
9.0
8.0
μs
9.0
8.0
33784
8
Analog Integrated Circuit Device Data
Freescale Semiconductor