Maxim MAX3532EAX Datasheet

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________________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 operat­ing 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 out­put 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 shut­down 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 Telephony over Cable
CATV Set-Top Box

____________________________Features

♦ Single +5V Supply
♦ Output Level Ranges from Less than 8dBmV

to 62dBmV, in 1dB Steps

♦ Gain Programmable in 1dB Steps
♦ 350mW Typical Power Dissipation
♦ Transmit-Disable Mode
♦ Two Shutdown Modes

MAX3532

†

Upstream CATV Driver Amplifier

________________________________________________________________

Maxim Integrated Products

1

36
35
34
33
32
31
30
29
28
27
26
25
24
23

1
2
3
4
5
6
7
8

9
10
11
12
13
14

SHDN
TXEN
VOUT­VOUT+
GND
V

EE

2

GND

V

CC

2

V

CC

VIN+
VIN­V

EE

GND
GND

V

CC

1

GND

GND

V

EE

1

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

SSOP

TOP VIEW

MAX3532

22
21
20
19

15
16
17
18 SDA

GND
GND
SCLK

CS

GND

GND

GND

___________________Pin Configuration

MAX3532

VOUT-

CONTROL

LOGIC

INPUT

V

CC

VEE2

VOUT+

V

CC

2

V

CC

V

EE

SCLK

SDA

CS

34

31

33

30
29

26
20
19

18

SHDN OUTPUT

TXEN

0.001µF

0.001µF

0.1µF

0.1µF

8.0Ω

8.0Ω

1:2

0.1µF

VIN+

GND

VIN-

V

CC

1

V

EE

1

V

CC

V

CC

CONTROL
LOGIC

36

35

28

1–10, 12, 13, 15–17,

21–25, 32

27

14

11

__________Typical Operating Circuit

19-1331; Rev 1; 6/98

PART

MAX3532EAX -40°C to +85°C

TEMP. RANGE PIN-PACKAGE

36 SSOP

EVALUATION KIT

AVAILABLE

_______________Ordering Information

†

Protected under U.S. Patent 5,748,027

MAX3532

†

Upstream CATV Driver Amplifier

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC= +4.75V to +5.25V, no RF applied, TA= -40°C to +85°C, unless otherwise noted.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

VCC........................................................................-0.5V to +7.0V

Input Voltage Levels (all inputs).................-0.3V to (V

CC

+ 0.3V)

Continuous RMS Input Voltage (VIN+, VIN-)..................60dBmV

Continuous Current (VOUT+, VOUT-)...............................100mA

Continuous Power Dissipation (T

A

= +70°C)

36-Pin SSOP (denote at 11mW/°C above +70°C) ........900mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range.............................-65°C to +165°C

Lead Temperature (soldering, 10sec).............................+300°C

TXEN = X, SHDN = 1, D7 and D6 = 00

TXEN = 1, SHDN = 1, D7 and D6 = 1X or 01

CS, SDA, SCLK, TXEN, SHDN

TXEN = X, SHDN = 0, D7 and D6 = XX

CS, SDA, SCLK, TXEN, SHDN
CS, SDA, SCLK, TXEN, SHDN
CS, SDA, SCLK, TXEN, SHDN

CONDITIONS

mA1.5 2I

CC

Software Shutdown Current

mA RMS75 95I

CC

V4.75 5.25V

CC

Supply Voltage
Supply Current

µA-100I

IL

Digital Input Low Current

µA0.1 10I

CC

Shutdown Current

V2.4V

IH

Digital Input High Voltage

V0.8V

IL

Digital Input Low Voltage

µA100I

IH

Digital Input High Current

UNITSMIN TYP MAXSYMBOLPARAMETER

D7 and D6 = 11, BW = 160kHz,
V

OUT

= 46dBmV to 62dBmV, f = 5MHz to 42MHz

VIN= 36dBmV to 40dBmV, AV= 22dB

VIN= 36dBmV to 40dBmV, AV= 22dB

fIN= 20MHz, V

OUT

= 58dBmV

fIN= 20MHz, V

OUT

= 52dBmV

Two input tones at 40MHz and 40.25MHz, both at
30dBmV; V

OUT

= 52dBmV per tone

TXEN = 0, fIN= 42MHz, V

OUT

= 58dBmV

CONDITIONS

dBc-80 -79

Output Noise
(High-Power Mode) (Note 1)

degrees1AMPMAM to PM

dB0.1AMAMAM to AM

dBc

-46 -40

HD2

-59 -55

Second Harmonic Distortion
(Note 1)

dBc-43 -37.5IMR3

Two-Tone Third-Order
Distortion (Note 1)

dB36Isolation in Standby Mode

dB1Output Step Size

dB

-32 -28

A

V

Voltage Gain

24 26

Vp-p3.6V

TXOUT

Output Signal Swing

UNITSMIN TYP MAXSYMBOLPARAMETER

AC ELECTRICAL CHARACTERISTICS

(VCC= +5V, VIN= 36dBmV, SHDN = TXEN = 1, fIN= 20MHz, Z

LOAD

= 75Ω through a 1:2 transformer with two precision 8.0Ω back-

termination resistors, T

A

= -40°C to +85°C, unless otherwise noted. Typical values are measured at TA= +25°C.)

fIN= 14MHz, V

OUT

= 58dBmV

fIN= 14MHz, V

OUT

= 52dBmV

dBc

-57 -48

HD3

-67 -58

Third Harmonic Distortion
(Note 1)

High power, D7–D0 = 11111101
Low noise, D7–D0 = 1001000

Output Noise
(Standby Mode) (Note 1)

MAX3532

†

Upstream CATV Driver Amplifier

_______________________________________________________________________________________ 3

Note 1: Guaranteed by design and characterization.

AC ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5V, VIN= 36dBmV, SHDN = TXEN = 1, fIN= 20MHz, Z

LOAD

= 75Ω through a 1:2 transformer with two precision 8.0Ω back-

termination resistors, T

A

= -40°C to +85°C, unless otherwise noted. Typical values are measured at TA= +25°C.)

SCLK Pulse Width High t

SCLKH

50

SCLK Pulse Width Low t

SCLKL

ns(Note 1)

50 ns(Note 1)

SDA to SCLK Setup Time t

SDAS

20

SDA to SCLK Hold Time t

SDAH

ns(Note 1)

20 ns(Note 1)

PARAMETER SYMBOL MIN TYP MAX UNITS

Output Noise
(Low-Power Mode)
(Note 1)

-75 -73 dBc

Output Return Loss (Note 1) 12 dB
TXEN Transient Duration 3 7 µs
TXEN Transient Step Size 25 100 mV

Power-Enable Transient
Duration (Note 1)

1 2.5 5 µs

CS to SCLK Setup Time

t

CSS

20

CONDITIONS

TXEN rise/fall time < 100ns, TA= +25°C (Note 1)

ns

TA= +25°C, AV= 22dB (Note 1)

D7 and D6 = 10, V

OUT

> 27dBmV,

BW = 160kHz, f = 5MHz to 42MHz

fIN= 5MHz to 42MHz

TA= +25°C

(Note 1)

CS to SCLK Hold Time

t

CSH

20 ns(Note 1)

Output Noise
(Standby Mode) (Note 1)

-47 -45 dBmV

TXEN = 0, BW = 160kHz,
f = 5MHz to 42MHz

-47 -45 dBmV

D7 and D6 = 10, V

OUT

≤ 27dBmV,

BW = 160kHz, f = 5MHz to 42MHz

SERIAL INTERFACE

__________________________________________Typical Operating Characteristics

(VCC= 5.0V, VIN= 36dBmV, fIN= 20MHz, SHDN = TXEN = 1, Z

LOAD

= 75Ω through a 1:2 transformer with two precision 8.0Ω back-

termination resistors, T

A

= +25°C, unless otherwise noted.)

60

65

75

70

80

85

-40 0-20 25 50 85

SUPPLY CURRENT vs. TEMPERATURE

MAX3532toc01

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

VCC = 5.25V

VCC = 4.75V

VCC = 5.0V

60

70

65

80

75

85

90

4.75 5 5.25

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX3532toc02

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

TA = +85°C

TA = +25°C
TA = 0°C

TA = -40°C

60

65

95

75
70

80

85

90

100

12 21 26 3116 36 41 5550 5945 64

SUPPLY CURRENT vs. OUTPUT LEVEL

MAX3532toc03

OUTPUT LEVEL (dBmV)

SUPPLY CURRENT (mA)