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| 型号： | AD8339ACPZ-RL |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 调制器/解调器 |
| 英文描述： | 0 MHz - 50 MHz RF/MICROWAVE I/Q DEMODULATOR |
| 封装： | 6 X 6 MM, ROHS COMPLIANT, MO-220-VJJD-2, LFCSP-40 |
| 文件页数： | 10/36页 |
| 文件大小： | 2970K |
| 代理商： | AD8339ACPZ-RL |
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AD8339
Rev. A | Page 18 of
36
THEORY OF OPERATION
0
65
87
-05
1
COMM 3
COMM 4
VPOS 7
VPOS 8
VPOS
28
4LON
25
VNEG
24
VNEG
23
VPOS
11
SDO
12
Q4OP
19
VNEG
20
RF4P
13
RF4N
14
COMM
15
VPOS
16
LODC
17
I4OP
18
RSTS
40
SDI
39
Q1OP
32
VNEG
31
RF1P
38
RF1N
37
COMM
36
VPOS
35
RSET
34
I1OP
33
AD8339
BIAS
SERIAL
INTERFACE
(SPI)
RF2N 1
RF2P 2
SCLK 5
RF3P 9
RF3N 10
Q3OP
21
I3OP
22
Q2OP
30
I2OP
29
VPOS
27
4LOP
26
CSB 6
CURRENT
MIRROR
V TO I
Φ
CURRENT
MIRROR
Φ
CURRENT
MIRROR
V TO I
Φ
CURRENT
MIRROR
Φ
0°
CURRENT
MIRROR
V TO I
Φ
CURRENT
MIRROR
Φ
CURRENT
MIRROR
V TO I
Φ
CURRENT
MIRROR
Φ
0°
90°
LOCAL OSCILLATOR DIVIDE BY 4
Figure 52. AD8339 Block Diagram
The AD8339 is a quad I/Q demodulator with a programmable
phase shifter for each channel. The primary application is
phased array beamforming in medical ultrasound. Other
potential applications include phased array radar and smart
antennas for mobile communications. The AD8339 can also be
used in applications that require multiple well-matched I/Q
demodulators. The AD8339 is architecturally very similar to its
predecessor, the AD8333. The major differences are
The addition of a serial (SPI) interface that allows daisy
chaining of multiple devices
Reduced power per channel
Figure 52 shows the block diagram and pinout of the AD8339.
The analog inputs include the four RF inputs, which accept signals
from the RF sources, and a local oscillator (applied to differential
input pins marked 4LOP and 4LON) common to all channels.
Each channel can be shifted up to 347.5° in 16 increments, or
22.5° per increment, via the SPI port. The AD8339 has two reset
inputs: RSET synchronizes the LO dividers when multiple
AD8339s are used in arrays; RSTS sets all the SPI port control
bits to 0. RSTS is used for testing or to disable the AD8339
without the need to program it via the SPI port.
The I and Q outputs are current-formatted and summed together
for beamforming applications. A transimpedance amplifier
using an AD8021 op amp is a nearly ideal method for summing
multiple channels and current-to-voltage conversion because
each of the AD8339 outputs is terminated by a virtual ground.
A further advantage of the transimpedance amplifier is the
simple implementation of high-pass filtering and the flexible
number of channels accommodated.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8339-EVALZ | 功能描述:BOARD EVAL AD8339 I/Q DEMOD RoHS:是 类别:RF/IF 和 RFID >> RF 评估和开发套件，板 系列:- 标准包装:1 系列:- 类型:GPS 接收器 频率:1575MHz 适用于相关产品:- 已供物品:模块 其它名称:SER3796 |
| AD834 | 制造商:AD 制造商全称:Analog Devices 功能描述:500 MHz Four-Quadrant Multiplier |
| AD834_12 | 制造商:AD 制造商全称:Analog Devices 功能描述:500 MHz Four-Quadrant Multiplier |
| AD8340 | 制造商:AD 制造商全称:Analog Devices 功能描述:400 MHz to 6 GHz Broadband Quadrature Modulator |
| AD8340ACPZ-REEL7 | 功能描述:IC MOD VECT 700-1000MHZ 24LFCSP RoHS:是 类别:RF/IF 和 RFID >> RF 调制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:调制器 LO 频率:700MHz ~ 2.3GHz RF 频率:700MHz ~ 2.3GHz P1dB:1dBm 底噪:-148dBm/Hz 输出功率:-1dBm 电流 - 电源:46mA 电源电压:2.7 V ~ 3.6 V 测试频率:1.75GHz 封装/外壳:28-WFQFN 裸露焊盘 包装:带卷 (TR) |
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