ATA6662 Ver la hoja de datos (PDF) - Atmel Corporation
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ATA6662 Datasheet PDF : 18 Pages
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6. Electrical Characteristics (Continued)
5V < VS < 27V, Tj = –40°C to +150°C
No. Parameters
Test Conditions
Pin Symbol Min. Typ. Max. Unit
8 LIN Bus Receiver
8.1 Center of receiver threshold
8.2 Receiver dominant state
8.3 Receiver recessive state
8.4 Receiver input hysteresis
8.5
Pre-wake detection LIN
High-level input voltage
VBUS_CNT =
(Vth_dom + Vth_rec) / 2
VEN = 5V
VEN = 5V
VHYS = Vth_rec – Vth_dom
6
VBUS_CNT
0.475 ×
VS
0.5 ×
VS
0.525
× VS
V
6
VBUSdom
–27
0.4 ×
VS
V
6
VBUSrec
0.6 ×
VS
40
V
6
VBUShys
0.028 × 0.1 × 0.175
VS
VS × VS
V
6
VLINH
VS –
2V
VS +
0.3V
V
8.6
Pre-wake detection LIN
Low-level input voltage
Switches the LIN receiver on 6
VLINL
–27V
VS –
3.3V
V
9 Internal Timers
9.1
Dominant time for wake-up via
LIN bus
VLIN = 0V
6
tBUS
30
90 150 µs
9.2
Time of low pulse for wake-up
via pin WAKE
VWAKE = 0V
3
tWAKE
7
35
50
µs
Time delay for mode change
9.3 from Fail-safe Mode to Normal VEN = 5V
Mode via pin EN
2
tnorm
2
7
15 µs
Time delay for mode change
9.4 from Normal Mode into Sleep
Mode via pin EN
VEN = 0V
2
tsleep
2
7
12 µs
9.5 TXD dominant time out time
VTXD = 0V
9.6
Power-up delay between VS = 5V
until INH switches to high
VVS = 5V
4
tdom
tVS
6
9
20 ms
200 µs
LIN Bus Driver AC Parameter with Different Bus Loads
10 Load 1 (small): 1 nF, 1 kΩ ; Load 2 (large): 10 nF, 500Ω ; RRXD = 5 kΩ ; CRXD = 20 pF;
Load 3 (medium): 6.8 nF, 660Ω characterized on samples; 10.1 and 10.2 specifies the timing parameters for proper
operation at 20 Kbit/s, 10.3 and 10.4 at 10.4 Kbit/s.
10.1 Duty cycle 1
THRec(max) = 0.744 × VS
THDom(max) = 0.581 × VS
VS = 7.0V to 18V
6
D1
0.396
tBit = 50 µs
D1 = tbus_rec(min) / (2 × tBit)
10.2 Duty cycle 2
THRec(min) = 0.422 × VS
THDom(min) = 0.284 × VS
VS = 7.0V to 18V
6
D2
tBit = 50 µs
D2 = tbus_rec(max) / (2 × tBit)
0.581
10.3 Duty cycle 3
THRec(max) = 0.778 × VS
THDom(max) = 0.616 × VS
VS = 7.0V to 18V
6
D3
0.417
tBit = 96 µs
D3 = tbus_rec(min) / (2 × tBit)
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Type*
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
12 ATA6662
4916O–AUTO–05/10
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