MAX3510 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Upstream CATV Amplifier

19-1398; Rev 2; 8/99
EVFAOLLULAOTWIOSNDKAITTAMSAHNEUEATL
Upstream CATV Amplifier
General Description
The MAX3510 is a programmable power amplifier for
use in CATV upstream applications. The device outputs
up to 64dBmV (continuous wave) through a 2:1 (voltage
ratio) transformer. It features variable gain controlled by
a 3-wire digital serial bus. Gain control is available in
1dB steps. The device operates over a frequency
range of 5MHz to 65MHz.
The MAX3510 offers a transmit-disable mode, which
places the device in a high-isolation state for use
between bursts in TDMA systems. In this mode the out-
put stage is shut off, minimizing output noise. When
entering and leaving transmit-disable mode, transients
are kept to 7mV nominal at full gain. In addition, supply
current is reduced to 25mA.
Two power-down modes are available. Software-shutdown
mode permits power-down of all analog circuitry while
maintaining the programmed gain setting. Shutdown
mode disables all circuitry and reduces current consump-
tion to less than 10µA.
The MAX3510 is available in a 20-pin QSOP package
for the extended-industrial temperature range (-40°C to
+85°C).
Applications
Cable Modems
Telephony over Cable
CATV Set-Top Box
CATV Status Monitor
Features
o Ultra-Low Power-Up/Down Transients,
7mV Typical at 59dBmV Output
o Single +5V Supply
o Output Level Ranges from <8dBmV to 64dBmV
o Gain Programmable in 1dB Steps
o Low Transmit Output Noise Floor: -47dBmV
(160kHz BW)
o Low Transmit-Disable Output Noise: -70dBmV
o Two Power-Down Modes
PART
MAX3510EEP
Ordering Information
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
20 QSOP
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
CONTROL
LOGIC
12
SHDN
18
TXEN
0.001µF
+
5
VIN+
ANTI-ALIAS
INPUT
FILTER
–
+5V
0.1µF
6
VIN-
0.001µF _{2 VCC1}
4 _GND1
3 _GND
7 _GND
1 _GND
MAX3510
20
GND2
19
0.1µF
V_CC2
+5V
17
CEXT1
0.0033µF
VOUT+ ¹⁶
2:1
15
VOUT-
14
CEXT2
N.C. 13
11
GND
10
SCLK
9
SDA
8
CS
+5V
0.1µF
0.1µF
CONTROL
LOGIC
OUTPUT
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone].