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參數(shù)資料
| 型號(hào)： | AD5700BCPZ-RL7 |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 24/24頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC HART MODEM LP 24LFCSP |
| 標(biāo)準(zhǔn)包裝： | 1,500 |
| 系列： | * |
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Data Sheet
AD5700/AD5700-1
Rev. F | Page 9 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
Figure 3. Carrier Start Time
Figure 4. Carrier Stop/Decay Time
Figure 5. Carrier Detect On Timing
Figure 6. Carrier Detect Off Timing
Figure 7. Carrier Detect on When Switching from Transmit Mode to Receive
Mode in the Presence of a Constant Valid Carrier
Figure 8. Supply Currents vs. Supply Voltage—External Reference
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.3
0
0.3
0.6
0.9
1.2
1.5
1.8
2.1
TIME (ms)
HART
_O
UT
(
V
)
10435-
003
TXD
RTS
TA = 25°C; VCC = IOVCC = 3.3V; INT VREF
RTS AND TXD DC LEVELS HAVE BEEN ADJUSTED FOR
CLARITY. IN REALITY, BOTH OF THESE SIGNALS RANGE
FROM 0V TO 3.3V.
HART_OUT
t1
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–2.0
–1.5
–1.0
–0.5
0
0.5
1.0
TIME (ms)
HART
_O
UT
(
V
)
10435-
004
TXD
RTS
HART_OUT
TA = 25°C; VCC = IOVCC = 3.3V; INT VREF
RTS AND TXD DC LEVELS HAVE BEEN ADJUSTED FOR
CLARITY. IN REALITY, BOTH OF THESE SIGNALS RANGE
FROM 0V TO 3.3V.
t3
t2
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.5
0
0.5
1.0
1.5
2.0
2.5
TIME (ms)
HART
S
IG
NAL
(
V
)
10435-
005
RXD
CD
HART SIGNAL
TA = 25°C; VCC = IOVCC = 3.3V; INT VREF
CD AND RXD DC LEVELS HAVE BEEN ADJUSTED FOR
CLARITY. IN REALITY, BOTH OF THESE SIGNALS RANGE
FROM 0V TO 3.3V.
t4
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–5
–4
–3
–2
–1
0
1
TIME (ms)
HART
S
IG
NAL
(
V
)
10435-
006
RXD
CD
HART SIGNAL
TA = 25°C; VCC = IOVCC = 3.3V; INT VREF
CD AND RXD DC LEVELS HAVE BEEN ADJUSTED FOR
CLARITY. IN REALITY, BOTH OF THESE SIGNALS RANGE
FROM 0V TO 3.3V.
t5
1.50
1.25
1.00
0.75
0.50
0.25
0
–0.50
–0.25
–0.75
–1.00
–10
–7.5
–5.0
–2.5
0
2.5
TIME (ms)
HART
_O
UT
(
V
)
10435-
007
CD
HART_OUT
HART SIGNAL
RTS
TA = 25°C; VCC = IOVCC = 3.3V; INT VREF
RTS AND CD DC LEVELS HAVE BEEN ADJUSTED FOR
CLARITY. IN REALITY, BOTH OF THESE SIGNALS RANGE
FROM 0V TO 3.3V.
HART SIGNAL HAS ALSO
BEEN OFFSET BY –0.6V.
t6
100
90
80
70
60
50
40
30
20
10
0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
VCC = IOVCC (V)
S
UP
P
L
Y
CURRE
NT
(
A)
10435-
008
TA = 25°C
VCC = IOVCC = 2.7V TO 5.5V
DEV 1 EXT REF
DEMOD ICC AND IOICC
DEMOD IREF
MOD IREF
MOD ICC AND IOICC
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