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參數(shù)資料
| 型號： | ADM3078EYRZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 7/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX RS-485 3V HD 8SOIC |
| 標準包裝： | 98 |
| 類型： | 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 1/1 |
| 規(guī)程： | RS422，RS485 |
| 電源電壓： | 3 V ~ 3.6 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SO |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 790 (CN2011-ZH PDF) |
ADM3070E/ADM3071E/ADM3072E/ADM3073E/ADM3074E/ADM3075E/ADM3076E/ADM3077E/ADM3078E
Rev. E | Page 15 of 20
CIRCUIT DESCRIPTION
The ADM307xE series are high speed transceivers for RS485
and RS-422 communications. Each device contains one driver
and one receiver. All devices feature fail-safe circuitry, which
guarantees a logic high receiver output when the receiver inputs
are open or shorted or when they are connected to a terminated
transmission line with all drivers disabled (see the Receiver Fail-
Safe section). The ADM307xE also feature a hot-swap capability,
allowing line insertion without erroneous data transfer (see the
Hot-Swap Capability section). The ADM3070E/ADM3071E/
ADM3072E feature reduced slew rate drivers that minimize
EMI and reduce reflections caused by improperly terminated
cables, allowing for error-free data transmission at rates up to
250 kbps.
The ADM3073E/ADM3074E/ADM3075E also offer slew rate
limits, allowing transmit speeds up to 500 kbps. The ADM3076E/
ADM3077E/ADM3078E driver slew rates are not limited, making
possible transmit speeds of up to 16 Mbps. The ADM3072E/
ADM3075E/ADM3078E are half-duplex transceivers; the
ADM3070E/ADM3071E/ADM3073E/ADM3074E/ADM3076E/
ADM3077E are each full-duplex transceivers. All devices operate
from a single 3.3 V supply. Drivers are output short-circuit
current limited, and thermal shutdown circuitry protects
drivers against excessive power dissipation. When activated,
the thermal shutdown circuitry places the driver outputs into
a high impedance state.
FUNCTION TABLES
ADM3070E/ADM3073E/ADM3076E
Table 8. Transmitting Truth Table
Transmitting Inputs
Transmitting Outputs
RE
DE
DI
Y
Z
1
0
1
0
1
0
High-Z2
1
0
Shutdown
1 X = don't care.
2 High-Z = high impedance.
Table 9. Receiving Truth Table
Receiving Inputs
Receiving Outputs
RE
DE
A B
RO
0
≥ 50 mV
1
0
≤ 200 mV
0
Open/shorted
1
High-Z2
1
0
Shutdown
1 X = don't care.
2 High-Z = high impedance.
ADM3071E/ADM3074E/ADM3077E
Table 10. Transmitting Truth Table
Transmitting Input
Transmitting Outputs
DI
Y
Z
1
0
1
Table 11. Receiving Truth Table
Receiving Input
Receiving Output
A B
RO
≥ 50 mV
1
≤ 200 mV
0
Open/shorted
1
ADM3072E/ADM3075E/ADM3078E
Table 12. Transmitting Truth Table
Transmitting Inputs
Transmitting Outputs
RE
DE
DI
A, Y
B, Z
1
0
1
0
1
0
High-Z2
1
0
Shutdown
1 X = don't care.
2 High-Z = high impedance.
Table 13. Receiving Truth Table
Receiving Inputs
Receiving Output
RE
DE
A B
RO
0
≥ 50 mV
1
0
≤ 200 mV
0
Open/shorted
1
High-Z2
1
0
Shutdown
1 X = don't care.
2 High-Z = high impedance.
RECEIVER FAIL-SAFE
The ADM307xE family guarantees a logic high receiver output
when the receiver inputs are shorted, open, or connected to a
terminated transmission line with all drivers disabled. This is
done by setting the receiver input threshold between 50 mV
and 200 mV. If the differential receiver input voltage (A B)
is greater than or equal to 50 mV, RO is logic high. If A B
is less than or equal to 200 mV, RO is logic low. In the case
of a terminated bus with all transmitters disabled, the receiver
differential input voltage is pulled to 0 V by the termination.
With the receiver thresholds of the ADM307xE family, this
results in a logic high with a 50 mV minimum noise margin.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADM3078EYRZ-REEL7 | 功能描述:TXRX 3V 15KV 500KBPS ESD 8-SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 標準包裝:121 系列:- 類型:收發(fā)器 驅(qū)動器/接收器數(shù):1/1 規(guī)程:RS422，RS485 電源電壓:3 V ~ 3.6 V 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-DFN（3x3） 包裝:管件 |
| ADM307EARZ | 制造商:AD 制造商全稱:Analog Devices 功能描述:3.3 V, 【15 kV ESD-Protected, Half- and Full-Duplex, RS-485/RS-422 Transceivers |
| ADM307EARZ-REEL7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:3.3 V, 【15 kV ESD-Protected, Half- and Full-Duplex, RS-485/RS-422 Transceivers |
| ADM307EYRZ | 制造商:AD 制造商全稱:Analog Devices 功能描述:3.3 V, 【15 kV ESD-Protected, Half- and Full-Duplex, RS-485/RS-422 Transceivers |
| ADM307EYRZ-REEL7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:3.3 V, 【15 kV ESD-Protected, Half- and Full-Duplex, RS-485/RS-422 Transceivers |
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