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| 型号： | MAX2032ETP+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 16/19页 |
| 文件大小： | 0K |
| 描述： | IC MIXER UP/DOWN CONVER 20TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| RF 型： | GSM，EDGE，CDMA |
| 频率： | 650MHz ~ 1GHz |
| 混频器数目： | 1 |
| 噪音数据： | 7dB |
| 次要属性： | 升/降频器 |
| 电流 - 电源： | 85mA |
| 电源电压： | 4.75 V ~ 5.25 V |
| 包装： | 管件 |
| 封装/外壳： | 20-WQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（5x5） |
High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch
Pin Description
PIN
1, 6, 8, 14
2
3
4, 5, 10, 12,
13, 16, 17, 20
NAME
V CC
RF
TAP
GND
FUNCTION
Power-Supply Connection. Bypass each V CC pin to GND with capacitors as shown in the Typical
Application Circuit .
Single-Ended 50 ? RF Input/Output. This port is internally matched and DC shorted to GND through a balun.
Center Tap of the Internal RF Balun. Connect to ground.
Ground
7
LOBIAS Bias Resistor for Internal LO Buffer. Connect a 523 ? ±1% resistor from LOBIAS to the power supply.
9
11
15
18, 19
—
LOSEL
LO1
LO2
IF-, IF+
EP
Local Oscillator Select. Logic-control input for selecting LO1 or LO2.
Local Oscillator Input 1. Drive LOSEL low to select LO1.
Local Oscillator Input 2. Drive LOSEL high to select LO2.
Differential IF Input/Outputs
Exposed Pad. Internally connected to GND. Solder this exposed pad to a PCB pad that uses multiple
ground vias to provide heat transfer out of the device into the PCB ground planes. These multiple ground
vias are also required to achieve the noted RF performance.
Detailed Description
The MAX2032 can operate either as a downconverter or
an upconverter mixer that provides approximately 7dB of
conversion loss with a typical 7dB noise figure. IIP3 is
+33dBm and +31dBm for downconversion and upcon-
version modes, respectively. The integrated baluns and
matching circuitry allow for 50 ? single-ended interfaces
to the RF port and the two LO ports. The RF port can be
used as an input for downconversion or an output for
upconversion. A single-pole, double-throw (SPDT) switch
provides 50ns switching time between the two LO inputs
with 49dB of LO-to-LO isolation. Furthermore, the inte-
grated LO buffer provides a high drive level to the mixer
core, reducing the LO drive required at the MAX2032’s
inputs to a -3dBm to +3dBm range. The IF port incorpo-
rates a differential output for downconversion, which is
ideal for providing enhanced IIP2 performance. For
upconversion, the IF port is a differential input.
Specifications are guaranteed over broad frequency
ranges to allow for use in cellular band WCDMA,
cdmaOne?, cdma2000, and GSM 850/GSM 900 2.5G
EDGE base stations. The MAX2032 is specified to oper-
ate over a 650MHz to 1000MHz RF frequency range, a
650MHz to 1250MHz LO frequency range, and a DC to
250MHz IF frequency range. Operation beyond these
ranges is possible; see the Typical Operating Charac-
teristics for additional details.
The MAX2032 is optimized for high-side LO injection archi-
tectures. However, the device can operate in low-side LO
cdmaOne is a trademark of CDMA Development Group.
injection applications with an extended LO range, but
performance degrades as f LO decreases. See the Typical
Operating Characteristics for measurements taken with
f LO below 960MHz. For a pin-compatible device that has
been optimized for LO frequencies below 960MHz, refer
to the MAX2029.
RF Port and Balun
For using the MAX2032 as a downconverter, the RF
input is internally matched to 50 ? , requiring no external
matching components. A DC-blocking capacitor is
required because the input is internally DC shorted to
ground through the on-chip balun. For upconverter
operation, the RF port is a single-ended output similarly
matched to 50 ? .
LO Inputs, Buffer, and Balun
The MAX2032 is optimized for high-side LO injection
architectures with a 650MHz to 1250MHz LO frequency
range. For a device with a 570MHz to 900MHz LO fre-
quency range, refer to the MAX2029. As an added fea-
ture, the MAX2032 includes an internal LO SPDT switch
that can be used for frequency-hopping applications.
The switch selects one of the two single-ended LO
ports, allowing the external oscillator to settle on a par-
ticular frequency before it is switched in. LO switching
time is typically less than 50ns, which is more than ade-
quate for nearly all GSM applications. If frequency hop-
ping is not employed, set the switch to either of the LO
inputs. The switch is controlled by a digital input
(LOSEL): logic-high selects LO2, logic-low selects LO1.
16
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