MAX2721 반도체 회로 부품 판매점
1.7GHz to 2.5GHz / Direct I/Q Modulator with VGA and PA Driver
|
|
 Maxim Integrated |
19-1606; Rev 0; 1/00
1.7GHz to 2.5GHz, Direct I/Q Modulator with
VGA and PA Driver
General Description
The MAX2720/MAX2721 are low-cost, high-performance,
direct I/Q modulators designed for use in wideband-
CDMA and wireless local-loop (WLL) systems. Their
direct-upconversion architecture reduces system cost,
component count, and board space compared to
devices with dual-conversion architectures.
The MAX2720/MAX2721 include an I/Q modulator, a
www.DataSheevta4rUia.cbomle gain amplifier (VGA), and a power amplifier
(PA) driver. The quadrature modulator accepts differential
baseband I/Q signals and directly modulates an RF
carrier in the 1.7GHz to 2.1GHz range (MAX2720) or
the 2.1GHz to 2.5GHz range (MAX2721). The VGA pro-
vides 35dB of output power control. The modulator’s
amplitude and phase balance yield 35dBc of sideband
suppression and 30dBc of carrier suppression. These
devices feature an LO frequency doubler that allows
the external LO source to operate at half-frequency or
full-frequency when disabled.
The MAX2720/MAX2721 operate from a single +2.7V to
+3.3V supply and require only 77mA (MAX2720) or
86mA (MAX2721) of supply current. An additional
20mA of supply current is saved by disabling the
stand-alone PA driver. A low-power shutdown mode
further reduces supply current to less than 0.1µA. The
device is packaged in the small 20-pin TSSOP-EP with
exposed paddle to improve RF performance.
Features
o RF Frequency Range
1.7GHz to 2.1GHz (MAX2720)
2.1GHz to 2.5GHz (MAX2721)
o Integrated I/Q Modulator, LO Doubler, VGA, and
PA Driver
o 35dB VGA Gain Control Range
o 35dBc Sideband Suppression
o 30dBc Carrier Suppression
o Low Supply Current
77mA (MAX2720), 86mA (MAX2721)
20mA Reduction with PA Driver Disabled
o 0.1µA Supply Current in Shutdown Mode
o +2.7V to +3.3V Single-Supply Operation
PART
MAX2720EUP
MAX2721EUP
*Exposed paddle.
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 TSSOP-EP*
20 TSSOP-EP*
Applications
Wireless Local Loop (WLL)
Wideband CDMA Systems
LMDS/MMDS
2.4GHz Broadband ISM Radios
DCS/PCS Base Stations
Pin Configuration appears at end of data sheet.
Functional Diagram
MAX2720/MAX2721
GND 1
DROUT 2
SHDN 3
VCC 4
GND 5
VCC 6
I- 7
I+ 8
VCC 9
GND 10
PA DRIVER
VGA
Σ
90°
0°
BIAS
x2
LO DOUBLER
20 DRIN
19 GND
18 PC
17 MODOUT
16 ENX2
15 VCC
14 Q-
13 Q+
12 VCC
11 LO
________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1.7GHz to 2.5GHz, Direct I/Q Modulator with
VGA and PA Driver
ABSOLUTE MAXIMUM RATINGS
VCC to GND ..............................................................-0.3V to +6V
ENX2, SHDN, PC, I+, I-, Q+, Q-, LO,
DRIN to GND ........................................-0.3V to (VCC + 0.3V)
ENX2, SHDN Continuous Current.....................................±10mA
PC Continuous Current.....................................................±10mA
I+ to I-, Q+ to Q- ....................................................................±2V
MODOUT, DROUT to GND Short-Circuit Duration .................10s
Continuous Power Dissipation (TA = +70°C)
20-Pin TSSOP-EP (derate 21.7mW/°C above +70°C) ......1.74W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................ -65°C to +150°C
Lead Temperature (soldering 10s) ................................. +300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
www.DataSheeotp4eUra.ctioonmof 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.
DC ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +3.3V; SHDN = VCC; ENX2 = GND; VPC = 0.5V; no input AC signals applied to I+, I-, Q+, Q-, LO, DRIN. MODOUT
and DROUT = VCC, TA = -40°C to +85°C. Typical values are at VCC. = +3V, TA = +25°C, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Supply Voltage
2.7 3.3 V
Supply Current
MAX2720
MAX2721
77 119
mA
86 129
Supply Current with PA Driver
Disabled
MAX2720, DRIN = GND
MAX2721, DRIN = GND
59 86
mA
67 96
Shutdown Supply Current
SHDN = GND
0.1 10
µA
Logic Input High Voltage
2.0 V
Logic Input Low Voltage
0.5 V
Logic Input Bias Current
-1 1 µA
PC Input Bias Current
0.5V < VPC < 2.5V
0.5V < VPC < 2.5V, SHDN = GND
-5
2.5
5
µA
AC ELECTRICAL CHARACTERISTICS
(MAX2720/MAX2721 EV Kit, VCC = +3.0V, SHDN = VCC, ENX2 = GND, VPC = 2.5V, input I/Q signals driven in quadrature, from a
1kΩ source impedance, single-ended, fI+ = fQ+ = 500kHz, VI+ = VQ+ = 200mVp-p, PLO = -13dBm, fLO = 950MHz (MAX2720), fLO =
1157.5MHz (MAX2721), PDRIN = -12dBm, fDRIN = 1900MHz (MAX2720), fDRIN = 2315MHz (MAX2721), MODOUT and DROUT ports
are matched to a 50Ω load, TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
I/Q BASEBAND INPUTS
I/Q Input -1dB Bandwidth (Note 2)
I/Q Input -3dB Bandwidth (Note 2)
I/Q Differential Input Level
I/Q Gain Imbalance
I/Q Phase Imbalance
I/Q Input Resistance
I/Q Input Resistance Mismatch
I/Q Input Capacitance
Group Delay Ripple
Group Delay Mismatch
CONDITIONS
fI = fQ < BW-3dB, 0.5V < VPC < 2.5V
fI = fQ < BW-3dB, 0.5V < VPC < 2.5V
fI = fQ < BW-1dB
fI = fQ < BW-1dB
fI = fQ < BW-1dB
100kHz < fI+ = fQ+ < 2MHz
100kHz < fI = fQ < 2MHz
MIN TYP MAX UNITS
14 20
MHz
40 MHz
200 630 mVp-p
±0.2
dB
±1.0
degrees
1.6 2.0
kΩ
18 Ω
5 pF
1 ns
1 ns
2 _______________________________________________________________________________________
|
PDF 파일 내의 페이지 : 총 24 페이지
제조업체: Maxim Integrated
( maxim )
MAX2721 driver
데이터시트 다운로드 :
[ MAX2721.PDF ]
[ MAX2721 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
관련 데이터시트
MAX2720
1.7GHz to 2.5GHz / Direct I/Q Modulator with VGA and PA Driver - Maxim Integrated
MAX2721
1.7GHz to 2.5GHz / Direct I/Q Modulator with VGA and PA Driver - Maxim Integrated