Maxim MAX2233EEE, MAX2232EEE Datasheet

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General Description

The MAX2232/MAX2233 low-voltage, silicon RF power
amplifiers (PAs) are designed for use in the 900MHz
ISM band. They operate from a single +2.7V to +5.5V
supply, allowing them to be powered directly from a 3­cell NiCd or a 1-cell Lithium-Ion battery. The devices
typically deliver 250mW (+24dBm) of output power at
915MHz from a single +3.6V supply, or 150mW
(+22dBm) from a single +2.7V supply. At +24dBm out­put power, power-added efficiency (PAE) is 44%.

The MAX2232/MAX2233 provide 24dB of gain, which is
adjustable over a continuous 24dB span via the analog
gain-control pin of the MAX2232 or in two 10dB steps
via the 2-bit programmable gain-control DAC of the
MAX2233. An external capacitor sets the RF output
power envelope ramp time, reducing spurious emis­sions during power-up and power-down by providing a
gradual change in output power (MAX2232).

The MAX2232/MAX2233 feature a low-power shutdown
mode, which typically draws less than 1µA of supply
current, saving power during “idle slots” in time-division
multiple-access (TDMA) systems. The ∆VSWR of the RF
input in shutdown mode relative to normal operation is

1.2:1. The devices also feature a thermal shutdown
function, enabling the PA to protect itself from excessive
temperature conditions that could damage the IC. A
capacitor to ground limits thermal cycling by setting a
thermal shutdown timeout period.

The MAX2232/MAX2233 are available in a space-sav­ing, thermally enhanced 16-pin power-QSOP (PQSOP)
package.

Applications

900MHz ISM Band
Digital Cordless Phones
Wireless Data
FM Analog Transmitters
868MHz European ISM Band

Features

♦ 800MHz to 1000MHz Frequency Range
♦ 250mW (+24dBm) Output Power at 915MHz from

+3.6V Supply

♦ +2.7V to +5.5V Single-Supply Operation
♦ 44% Power-Added Efficiency
♦ 24dB Power Gain
♦ 24dB Analog Gain-Control Range (MAX2232)
♦ Three Levels of Digitally Programmed Power Gain

in 10dB Steps (MAX2233)

♦ Programmable RF Power Envelope Ramping

(MAX2232)

♦ Thermal Shutdown
♦ Programmable Thermal Shutdown Timeout Period
♦ 0.2µA Low-Power Shutdown Mode
♦ Low ∆VWSR in Standby and Shutdown Modes

MAX2232/MAX2233

900MHz ISM-Band, 250mW Power Amplifiers

with Analog or Digital Gain Control

________________________________________________________________

Maxim Integrated Products

1

16
15
14
13
12
11
10

9

1
2
3
4
5
6
7
8

RFIN V

CC

GND
RAMP+ (N.C.)
RAMP- (N.C.)
V

CC

V

CC

TSET
N.C.

TOP VIEW

MAX2232
MAX2233

PQSOP

GND

SHDN (D1)

GND

CTRL (D0)

GND

GND

RFOUT

GROUND OF OUTPUT STAGE CONNECTED TO PACKAGE SLUG.
( ) ARE FOR MAX2233.

19-1470; Rev 0; 4/99

PART

MAX2232EEE
MAX2233EEE

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

16 PQSOP
16 PQSOP

Pin Configuration

Ordering Information

Functional Diagram appears at end of data sheet.

MAX2232/MAX2233

900MHz ISM-Band, 250mW Power Amplifiers
with Analog or Digital Gain Control

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(V

CC

= +2.7V to +5.5V, V

CTRL

= +2.2V, V

SHDN

= VD0= VD1= +2V, TA= -40°C to +85°C. No input signal applied, unless otherwise

noted. Typical values are at V

CC

= +3.6V and TA= +25°C.)

AC ELECTRICAL CHARACTERISTICS

(MAX2232/MAX2233 Evaluation Kit, VCC= +3.6V, V

CTRL

= +2.2V, SHDN = VCC(MAX2232), D0 = D1 = VCC(MAX2233),

P

RFIN

= 0dBm, ƒ

RFIN

= 915MHz, TA= +25°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.

VCCto GND...........................................................-0.3V to +6.5V

SHDN, CTRL, D0, D1 to GND ....................-0.3V to (V

CC

+0.3V)

I

RFIN

....................................................................................10mA

RFIN Power (50Ω AC-coupled source)..........................+10dBm

Output Load VSWR. ................................................................6:1

Continuous Power Dissipation (T

A

= +70°C)

16-Pin PQSOP (derate 80mW/°C above +70°C) ................3W

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

Storage Temperature Range.............................-65°C to +150°C

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

V

CTRL

≤ 0.4V (MAX2232)

V

SHDN

= 0.6V,

VD0= VD1= 0.6V

V

CTRL

= GND

V

SHDN

= GND (MAX2232),

VD0= VD1= GND (MAX2233)

V

SHDN

= 2.0V (MAX2232),

VD0= VD1= 2.0V (MAX2233)

MAX2232

SHDN (MAX2232), D0, D1 (MAX2233)
SHDN (MAX2232), D0, D1 (MAX2233)

MAX2232

V

CTRL

= 2.2V

CONDITIONS

1.5

mA20.3 25I

CC

Standby Supply Current

0.2 10

I

CC

V2.7 5.5V

CC

Supply Voltage Range
Shutdown Supply Current

µA

-1.5 1

CTRL Input Current

-1 1I

IL

µA

-1 10I

IH

Logic Input Current

V0.6V

CTRL

CTRL Input for Gain-Control
Mode

V2.0V

IH

Logic Input High

V0.6V

IL

Logic Input Low

V0.4V

CTRL

CTRL Input for Standby Mode

UNITS

MIN TYP MAX

SYMBOLPARAMETER

µA

7.5

VCC≤ 4.8V

4.8V < VCC≤ 5.5V

VCC= 4.8V

(Notes 1, 2)

D0 = GND, D1 = VCC(MAX2233 only)

VCC= 3.6V (Note 1)
VCC= 3.0V
VCC= 2.7V

TA= T

MIN

to T

MAX

(Note 1)

CONDITIONS

25.4

dB23.9G

P

MHz902 928ƒ

IN

Frequency Range
Power Gain

dBm15.8P

OUT

Output Power, Medium-Power
Mode

22.9 23.9 24.9
dBm

22.5

21.6

P

OUT

Output Power

dB1.9 3.2∆P

OUT

Output Power Variation Over
Temperature

UNITS

MIN TYP MAX

SYMBOLPARAMETER

MAX2232/MAX2233

900MHz ISM-Band, 250mW Power Amplifiers

with Analog or Digital Gain Control

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS (continued)

(MAX2232/MAX2233 Evaluation Kit, VCC= +3.6V, V

CTRL

= +2.2V, SHDN = VCC(MAX2232), D0 = D1 = VCC(MAX2233),

P

RFIN

= 0dBm, ƒ

RFIN

= 915MHz, TA= +25°C, unless otherwise noted.)

Note 1: Guaranteed by design.
Note 2: Operation outside this range is possible, but not characterized.
Note 3: Gain is monotonic with V

CTRL

.

Note 4: Input VSWR relative to input impedance in operating mode.
Note 5: Harmonics measured on evaluation kit, which provides some harmonic attenuation in addition to the rejection provided by

the IC. The combined suppression is specified.

Note 6: Time measured from SHDN (MAX2232) low-to-high transition to when output power is within 1dB of final value. Includes

effects of 1% tolerance capacitor.

Note 7: Time measured from SHDN (MAX2232) high-to-low transition to when output power is -20dB of final value. Includes effects

of 1% tolerance capacitors.

Note 8: Time from die temperature dropping below Thermal Shutdown Temperature, T

TH

, to when the device turns itself back on.

C

RAMP

= 0.22µF (Notes 1, 6) (MAX2232 only)

(Note 5)

Any load phase angle, P

RFIN

= +5dBm,

TA= T

MIN

to T

MAX

VCC= +2.7V to +5.5V,
6:1 VSWR at any phase angle,
P

RFIN

= +5dBm

CTRL = GND (MAX2232 only)

SHDN = D0 = D1 = GND

MAX2232 only

0.6V < V

CTRL

< 2.2V (MAX2232 only)

Z

SOURCE

= 50Ω (Note 1)

D0 = VCC, D1 = GND (MAX2233 only)

D0 = VCC, D1 = GND (MAX2233 only)

D0 = GND, D1 = VCC(MAX2233 only)

CTRL adjusted to give P

RFOUT

= +21dBm

(MAX2232 only)

CONDITIONS

ms0.9Autoramping Rise Time

dBc29Harmonic Suppression

6:1

Maximum Output Load VSWR
Without Damage (Note1)

dBc-60

Maximum Nonharmonic
Spurious Output Due to Load
Mismatch

dB

38

52

Off-Isolation

1.2:1∆VSWR

Input VSWR Change, Standby
Mode (Notes 1, 4)

1.4:1∆VSWR

Input VSWR Change, Shutdown
Mode (Notes 1, 4)

1.5:1VSWRInput VSWR

mA44.0I

CC

Supply Current, Low-Power
Mode

mA78.5I

CC

Supply Current, Medium-Power
Mode

%29PAE

Power-Added Efficiency at
+21dBm Output Power

%44PAEPower-Added Efficiency

dB23.6∆G

P

Gain-Control Range (Note 3)

dBm6.5P

OUT

Output Power, Low-Power Mode

UNITSMIN TYP MAXSYMBOLPARAMETER

P

RFIN

= 0dBm, VCC= +3.6V

RAMP+ = RAMP- = unconnected (Note 6)

C

RAMP

= 0.22µF (Notes 1, 7) (MAX2232 only)

C

TSET

= 0.22µF (Note 8)

°C145T

TH

Thermal Shutdown Temperature

µs0.4

ms3.2Autoramping Fall Time

Output Power Rise Time

ms900t

TH

Thermal Shutdown Timeout
Period