ADM3311 データシートの表示（PDF） - Analog Devices
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ADM3311 Datasheet PDF : 16 Pages
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ADM3307E/ADM3310E/ADM3311E/ADM3312E/ADM3315E
Mnemonic
VCC
V+
V–
GND
C1+, C1–
C2+, C2–
C3+, C3–
TIN
TOUT
RIN
ROUT
EN
SD
PIN FUNCTION DESCRIPTIONS
Function
Power Supply Input 2.7 V to 3.6 V.
Internally Generated Positive Supply, 7.25 V (6.5 V nominal for ADM3310E, ADM3315E). Capacitor C4 is
connected between VCC and V+.
Internally Generated Positive Supply, –7.25 V (–6.5 V nominal for ADM3310E, ADM3315E). Capacitor C5 is
connected between GND and V–.
Ground Pin. Must be connected to 0 V.
External Capacitor 1 is connected between these pins. A 0.1 mF capacitor is recommended, but larger capacitors
up to 1 mF may be used.
External Capacitor 2 is connected between these pins. A 0.1 mF capacitor is recommended, but larger capacitors
up to 1 mF may be used.
External Capacitor 3 is connected between these pins. A 0.1 mF capacitor is recommended, but larger capacitors
up to 1 mF may be used.
Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels. An internal 400 kW pull-up resistor to
VCC is connected on each input.
Transmitter (Driver) Outputs. Typically ± 5.5 V (± 6.4 V for ADM3311E and ADM3312E)
Receiver Inputs. These inputs accept RS-232 signal levels. An internal 5 kW pull-down resistor (22 kW for ADM3315E)
to GND is connected on each of these inputs.
Receiver Outputs. These are TTL/CMOS levels.
Receiver Enable. A high level three-states all the receiver outputs.
Shutdown Control. A high level disables the charge pump and reduces the quiescent current to less than 1 mA.
All transmitters and most receivers are disabled. One receiver remains active in shutdown (two receivers active
in shutdown for the ADM3310E).
• ADM3307E ROUT3 active in shutdown
• ADM3310E ROUT4 and ROUT5 active in shutdown
• ADM3311E ROUT5 active in shutdown
• ADM3312E ROUT3 active in shutdown
• ADM3315E ROUT3 active in shutdown
Table I. ADM3307E Truth Table
SD EN
00
01
10
11
Status
Normal
Operation
Normal
Operation
Shutdown
Shutdown
TOUT1–5
Enabled
Enabled
Disabled
Disabled
ROUT1–2
Enabled
Disabled
Disabled
Disabled
ROUT3
Enabled
Disabled
Enabled
Disabled
Table II. ADM3310E Truth Table
SD EN Status
00
01
10
11
Normal
Operation
Receivers
Disabled
Shutdown
Shutdown
TOUT1–3
Enabled
Enabled
Disabled
Disabled
ROUT1–3
Enabled
Disabled
Disabled
Disabled
ROUT4–5
Enabled
Disabled
Enabled
Disabled
Table III. ADM3311 Truth Table
SD EN
00
01
10
11
Status
Normal
Operation
Receivers
Disabled
Shutdown
Shutdown
TOUT1–3
Enabled
Enabled
Disabled
Disabled
ROUT1–4
Enabled
Disabled
Disabled
Disabled
ROUT5
Enabled
Disabled
Enabled
Disabled
Table IV. ADM3312E/ADM3315E Truth Table
SD EN
00
01
10
11
Status
Normal
Operation
Normal
Operation
Shutdown
Shutdown
TOUT1–3
Enabled
Enabled
Disabled
Disabled
ROUT1–2
Enabled
Disabled
Disabled
Disabled
ROUT3
Enabled
Disabled
Enabled
Disabled
REV. G
–7–
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