MAX3532 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – Upstream CATV Driver Amplifier

19-1331; Rev 1; 6/98
EVAALVUAAILTAIOBNLEKIT
Upstream CATV Driver Amplifier
________________General Description
The MAX3532 is a programmable power amplifier for
use in upstream cable applications. The device outputs
up to 62dBmV (continuous wave) through a 1:2 (voltage
ratio) transformer when driven with 36dBmV at its input.
It features variable gain, which is controlled via a 3-wire
digital serial bus and available in 1dB steps. The operat-
ing frequency ranges from 5MHz to 42MHz.
The MAX3532 offers three operating modes: high power,
low noise, and transmit disable. High-power mode
achieves the highest output levels, while low-noise mode
achieves the lowest output noise when driving lower out-
put levels. Transmit disable mode places the device in a
high-isolation state with minimum output noise, for use
between bursts in TDMA systems.
Two power-down modes are also available. Software shut-
down mode permits power-down of all analog circuitry while
maintaining the programmed gain setting. Shutdown mode
disables all circuitry and reduces current consumption
below 10µA.
The MAX3532 comes in a 36-pin SSOP package screened
for the extended-industrial temperature range (-40°C to
+85°C).
________________________Applications
Cable Modems
CATV Set-Top Box
Telephony over Cable
__________Typical Operating Circuit
36
SHDN
CONTROL
LOGIC
35
TXEN
1–10, 12, 13, 15–17,
21–25, 32
GND
VOUT- ^{34 8.0Ω}
1:2
OUTPUT
VOUT+ ^{33 8.0Ω}
MAX3532 VEE2 ³¹
INPUT
0.001µF
28 _VIN+
27 _VIN-
0.001µF
V_CC
0.1µF
14 _VCC1
11 _VEE1
30
V_CC2
29
V_CC
26
V_EE
20
SCLK
19
SDA
18
CS
0.1µF
0.1µF
V_CC
V_CC
CONTROL
LOGIC
____________________________Features
o Single +5V Supply
o Output Level Ranges from Less than 8dBmV
to 62dBmV, in 1dB Steps
o Gain Programmable in 1dB Steps
o 350mW Typical Power Dissipation
o Transmit-Disable Mode
o Two Shutdown Modes
_______________Ordering Information
PART
MAX3532EAX
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
36 SSOP
___________________Pin Configuration
TOP VIEW
GND 1
GND 2
GND 3
GND 4
GND 5
GND 6
GND 7
GND 8
GND 9
GND 10
V_EE1 11
GND 12
GND 13
V_CC1 14
GND 15
GND 16
GND 17
CS 18
MAX3532
SSOP
36 SHDN
35 TXEN
34 VOUT-
33 VOUT+
32 GND
31 V_EE2
30 V_CC2
29 V_CC
28 VIN+
27 VIN-
26 V_EE
25 GND
24 GND
23 GND
22 GND
21 GND
20 SCLK
19 SDA
†_{Protected under U.S. Patent 5,748,027}
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