MAX3510EEP-T Maxim Integrated Products, MAX3510EEP-T Datasheet

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MAX3510EEP-T

Manufacturer Part Number
MAX3510EEP-T
Description
Manufacturer
Maxim Integrated Products
Datasheet

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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).
19-1398; Rev 4; 5/07
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Cable Modems
CATV Set-Top Boxes
________________________________________________________________ Maxim Integrated Products
INPUT
+
General Description
+5V
0.1µF
ANTI-ALIAS
FILTER
Telephony-Over-Cable
CATV Status Monitors
CONTROL
LOGIC
Applications
0.001µF
0.001µF
12
18
5
6
2
4
3
7
1
SHDN
VIN-
V
GND1
GND
GND
TXEN
VIN+
GND
CC
1
MAX3510
Upstream CATV Amplifier
♦ Ultra-Low Power-Up/Down Transients,
♦ Single +5V Supply
♦ Output Level Ranges from <8dBmV to 64dBmV
♦ Gain Programmable in 1dB Steps
♦ Low Transmit Output Noise Floor: -47dBmV
♦ Low Transmit-Disable Output Noise: -70dBmV
♦ Two Power-Down Modes
Pin Configuration appears at end of data sheet.
+Denotes lead-free package.
MAX3510EEP
MAX3510EEP+
7mV Typical at 59dBmV Output
(160kHz BW)
VOUT+
CEXT1
VOUT-
CEXT2
PART
GND2
SCLK
V
GND
N.C.
SDA
CC
CS
2
20
16
13
10
9
8
19
17
15
14
11
0.0033µF
Typical Operating Circuit
0.1µF
+5V
CONTROL
LOGIC
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
0.1µF
Ordering Information
+5V
0.1µF
2:1
OUTPUT
PIN-PACKAGE
20 QSOP
20 QSOP
Features
1

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MAX3510EEP-T Summary of contents

Page 1

... Output Level Ranges from <8dBmV to 64dBmV ♦ Gain Programmable in 1dB Steps ♦ Low Transmit Output Noise Floor: -47dBmV (160kHz BW) ♦ Low Transmit-Disable Output Noise: -70dBmV ♦ Two Power-Down Modes PART MAX3510EEP MAX3510EEP+ +Denotes lead-free package. Applications Pin Configuration appears at end of data sheet. 12 SHDN GND2 18 ...

Page 2

Upstream CATV Amplifier ABSOLUTE MAXIMUM RATINGS 2), VOUT+, VOUT- ................... -0.5V to +10. Input Voltage Levels (all inputs), CEXT1, CEXT2.........................................-0. Continuous Input Voltage (VIN+, VIN-) ...............................2V Continuous Current (VOUT+, VOUT-).................................80mA Stresses ...

Page 3

AC ELECTRICAL CHARACTERISTICS (continued) = +4.75V to +5.25V, TXEN = SHDN = high former -40°C to +85°C, unless otherwise noted. Typical parameters are PARAMETER SYMBOL Transmit Mode Noise (Note ...

Page 4

Upstream CATV Amplifier TIMING CHARACTERISTICS = +4.75V to +5.25V, TXEN = SHDN = high PARAMETER SYMBOL CS to SCK Rise Setup Time t SENS CS to SCK Rise Hold Time t SENH SDA to ...

Page 5

TXEN = SHDN = high +5V otherwise noted.) VOLTAGE GAIN vs. GAIN-CONTROL WORD 40MHz 5MHz 60MHz ...

Page 6

Upstream CATV Amplifier Table 1. Reflection Coefficients (75Ω reference) FREQUENCY TRANSMIT MODE MHz REAL S11 1 0.937 2 0.937 5 0.936 10 0.932 20 0.932 30 0.932 40 0.927 60 0.922 80 0.913 120 0.889 160 0.850 200 0.753 PIN ...

Page 7

SHDN PGA BIAS VIN+ VIN- Figure 1. Functional Diagram Detailed Description The following sections describe the blocks shown in the functional diagram (Figure 1). Programmable-Gain Amplifier The programmable-gain amplifier (PGA) consists of the variable-gain amplifier (VGA) and ...

Page 8

Upstream CATV Amplifier Ramp Generator The ramp generator circuit is a simple RC charging cir- cuit, which is used to control power-up and power-down of the output power amplifier made up of CEXT1 and an internal 2kΩ resistor. ...

Page 9

Table 3. Chip-State Control Bits SHDN TXEN ...

Page 10

Upstream CATV Amplifier VIN+ 2kΩ 1.1pF VIN- Figure 3. Equivalent Input Circuit The model for the MAX3510 input impedance is shown in Figure 3. A well-designed printed circuit board is an essential part circuit. For best performance ...

Page 11

Pin Configuration TOP VIEW GND GND 3 18 GND1 4 17 MAX3510 VIN VIN GND SDA 9 12 SCLK 10 11 QSOP ______________________________________________________________________________________ Upstream ...

Page 12

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products Package Information ...

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