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PDF MAX2232 Data sheet ( Hoja de datos )
| Número de pieza | MAX2232 | |
| Descripción | 900MHz ISM-Band / 250mW Power Amplifiers with Analog or Digital Gain Control | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX2232 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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19-1470; Rev 0; 4/99
900MHz ISM-Band, 250mW Power Amplifiers
with Analog or Digital Gain Control
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 3-
cell 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 out-
put 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 emis-
sions 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-sav-
ing, thermally enhanced 16-pin power-QSOP (PQSOP)
package.
Applications
900MHz ISM Band
Digital Cordless Phones
Wireless Data
FM Analog Transmitters
868MHz European ISM Band
Functional Diagram appears at end of data sheet.
Features
o 800MHz to 1000MHz Frequency Range
o 250mW (+24dBm) Output Power at 915MHz from
+3.6V Supply
o +2.7V to +5.5V Single-Supply Operation
o 44% Power-Added Efficiency
o 24dB Power Gain
o 24dB Analog Gain-Control Range (MAX2232)
o Three Levels of Digitally Programmed Power Gain
in 10dB Steps (MAX2233)
o Programmable RF Power Envelope Ramping
(MAX2232)
o Thermal Shutdown
o Programmable Thermal Shutdown Timeout Period
o 0.2µA Low-Power Shutdown Mode
o Low ∆VWSR in Standby and Shutdown Modes
PART
MAX2232EEE
MAX2233EEE
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 PQSOP
16 PQSOP
Pin Configuration
TOP VIEW
RFIN 1
GND 2
SHDN (D1) 3
CTRL (D0) 4
GND 5
GND 6
GND 7
RFOUT 8
MAX2232
MAX2233
16 VCC
15 GND
14 RAMP+ (N.C.)
13 RAMP- (N.C.)
12 VCC
11 VCC
10 TSET
9 N.C.
PQSOP
GROUND OF OUTPUT STAGE CONNECTED TO PACKAGE SLUG.
( ) ARE FOR MAX2233.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1 page  
900MHz ISM-Band, 250mW Power Amplifiers
with Analog or Digital Gain Control
Pin Description
PIN
MAX2232 MAX2233
11
22
NAME
RFIN
GND
3 — SHDN
— 3 D1
4 — CTRL
— 4 D0
5, 6 5, 6 GND
7 7 GND
8 8 RFOUT
9
9, 13, 14
N.C.
10 10 TSET
11 11 VCC
12 12 VCC
13 — RAMP-
14 — RAMP+
15
16
SLUG
15
16
SLUG
GND
VCC
GND
FUNCTION
RF Input Port. Requires external matching network and blocking capacitor.
Input Stage Ground. Connect directly to low-inductance ground plane. If vias are used,
separate them from other GND pin vias.
Shutdown Control Input. Drive SHDN low to place the device in shutdown mode. Drive high
for normal operation.
Digital Gain/Shutdown Control Input. MSB of the 2-bit digital output power control. D0 and
D1 set the output power to one of three discrete levels. To place the device in shutdown,
drive D0 and D1 low (Table 2).
Analog Gain-Control Input. Apply a voltage between 0.6V and 2.2V to vary the gain of the
PA. Drive CTRL below 0.4V to place the device in standby mode. Drive CTRL above 2.2V to
place the device in peak output power mode.
Digital Gain/Shutdown Control Input. LSB of the 2-bit digital output power control. D0 and
D1 set the output power to one of three discrete levels. To place the device in shutdown,
drive D0 and D1 low (Table 2).
Second Stage Ground. Connect directly to low-inductance ground plane. If vias are used,
separate them from other GND pin vias.
Output Stage Ground. Connect directly to low-inductance ground plane. If vias are used,
separate them from other GND pin vias.
Open-Collector, RF Output Port. Connect output matching network to this pin.
No Connection. Do not make a connection to this pin.
Thermal Shutdown Timeout Capacitor Terminal. Connect a capacitor from TSET to ground
to limit thermal cycling.
Second Stage Supply Voltage. Bypass with appropriate capacitors to GND.
Input Stage Supply Voltage. Bypass with appropriate capacitors to GND.
Negative Terminal of Output Power Ramp Capacitor. Connect capacitor, CRAMP, between
RAMP+ and RAMP- to control the rise and fall time of the output power ramp.
Positive Terminal of Output Power Ramp Capacitor. Connect capacitor, CRAMP, between
RAMP+ and RAMP- to control the rise and fall time of the output power ramp.
Bias Circuitry Ground. Connect directly to low-inductance ground plane. If vias are used,
separate them from other GND pin vias.
Bias Circuitry Supply Voltage. Bypass with appropriate capacitors to GND.
Output Stage Ground. Provides additional thermal conduction, as well as a low-inductance
path to ground. Connect directly to low-inductance ground plane.
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MAX2232.PDF ] | |
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