MAX3532 データシートの表示（PDF） - Maxim Integrated

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MAX3532

Upstream CATV Driver Amplifier

Maxim Integrated 

Upstream CATV Driver Amplifier

______________________________________________________________Pin Description

PIN

1–10, 12, 13,

15, 16, 17,

21–25, 32

11

14

18

19

20

26

27

28

29

30

31

33

34

35

36

NAME

GND

VEE1

VCC1

CS

SDA

SCLK

VEE

VIN-

VIN+

VCC

VCC2

VEE2

VOUT+

VOUT-

TXEN

SHDN

FUNCTION

Ground Pins

Serial Data Interface Ground. As with all grounds, maintain the shortest possible

(low-inductance) connections to the ground plane.

Serial Data Interface +5V Supply. Bypass this pin with a 0.1µF decoupling capacitor as close to the

part as possible.

Serial-Interface Enable. TTL-compatible input. See Serial Interface section.

Serial-Interface Data. TTL-compatible input. See Serial Interface section.

Serial-Interface Clock. TTL-compatible input. See Serial Interface section.

Programmable Gain Amplifier (PGA) Ground. As with all grounds, maintain the shortest possible

(low-inductance) connection to the ground plane.

Negative Input. When not used, this port must be AC coupled to ground. Along with VIN+, this port

forms a high-impedance differential input to the PGA. Driving this port differentially will increase the

rejection of second-order distortion.

Positive Input. Along with VIN-, this port forms a high-impedance differential input to the PGA. Driving

this port differentially will increase the rejection of second-order distortion. AC couple to this pin.

PGA +5V Supply. Bypass this pin with a decoupling capacitor as close to the part as possible.

Power Amplifier +5V Supply. Bypass this pin with a decoupling capacitor as close to the part as

possible.

Power Amplifier Ground. As with all grounds, connections maintain the shortest possible (low-induc-

tance) length to the ground plane.

Positive Output. Along with VOUT-, this pin forms a low-impedance output. Typically this port drives

a 1:2 transformer through 8Ω series resistors.

Negative Output. Along with VOUT+, this pin forms a low-impedance output. Typically this port

drives a 1:2 transformer through 8Ω series resistors.

Transmit Amplifier Enable. Setting this pin low places the transmitter in a high-isolation state (transmit

disable mode). In this mode, however, significant common-mode voltage swings exist. It is, there-

fore, important to maintain good balance of the differential output through to the transformer primary.

Shutdown. When this pin is set low, all functions (including the serial interface) are disabled, leaving

only leakage currents to flow.

_______________________________________________________________________________________ 5

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