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参数资料
| 型号： | AD8347ARU-REEL |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 衰减器 |
| 英文描述： | 0.8 GHz-2.7 GHz Direct Conversion Quadrature Demodulator |
| 中文描述： | 800 MHz - 2700 MHz RF/MICROWAVE QUADRAPHASE DEMODULATOR |
| 封装： | MO-153AE, RU-28, TSSOP-28 |
| 文件页数： | 5/20页 |
| 文件大小： | 750K |
| 代理商： | AD8347ARU-REEL |
REV. 0
–5–
AD8347
PIN FUNCTION DESCRIPTIONS
Pin
No.
Equiv.
Cir.
Mnemonic
Description
1, 28
LOIN, LOIP
A
LO Input. For optimum performance, these inputs should be driven differentially. Typical input
drive level is equal to –8 dBm. To improve the match to a 50
source, connect a 200
shunt
resistor between LOIP and LOIN. A single-ended drive is also possible but this will slightly
increase LO leakage.
Positive Supply for LO Section. This pin should be decoupled with 0.1
μ
F and 100 pF capacitors.
I Channel Differential Baseband Output. Typical output swing is equal to 760 mV p-p differential
in AGC mode
. The common mode level on these pins is programmed by the voltage on VCMO.
Baseband Amplifier Common-Mode Voltage. The voltage applied to this pin sets the output
common-mode level of the baseband amplifiers. This pin can either be connected to VREF
(Pin 14) or to a reference voltage from another device (typically an ADC).
I Channel Baseband Amplifier Input. This pin, which has a high input impedance, should be
biased to VREF (approximately 1 V). If IAIN is connected directly to IMXO, biasing will be
provided by IMXO. If an ac-coupled filter is placed between IMXO and IAIN, this pin can be
biased from VREF through a 1 k
resistor. The gain from IAIN to the differential outputs
IOPN/IOPP is 30 dB.
Ground for Biasing and Baseband Sections
I & Q Channel Baseband Mixer/VGA Outputs. These are low impedance outputs whose bias
levels are equal to VREF. IMXO and QMXO are typically connected to IAIN and QAIN
respectively, either directly or through filters. These outputs have a maximum current limit of
about 1.5 mA. This allows for a 600 mV p-p swing into a 200
load. This corresponds to an
input level of –40 dBm @ max gain of 39.5 dB. At lower output levels, IMXO and QMXO, can
drive a lower load resistance, subject to the same current limit.
RF Section Ground
RF Input. RFIN must be ac-coupled to ground. The RF input signal should be ac-coupled into
RFIP. For a broadband 50
input impedance, connect a 200
resistor from the signal side of
RFIP’s coupling capacitor to ground. Please note that RFIN and RFIP are not interchangeable
differential inputs. RFIN is the ground reference for the input system.
Positive Supply for RF Section. This pin should be decoupled with 0.1
μ
F and 100 pF capacitors.
I Channel and Q Channel Offset Nulling Inputs. To null the dc-offset on the I Channel and
Q Channel Mixer Outputs (IMXO, QMXO), connect a 0.1
μ
F capacitor from these pins to
ground. Alternately, a forced voltage of approximately 1 V on these pins will disable the offset
compensation circuit.
Reference Voltage Output. This output voltage (1 V) is the main bias level for the device and
can be used to externally bias the inputs and outputs of the baseband amplifiers.
Chip Enable Input. Active high.
Gain Control Input. The voltage on this pin controls the gain on the RF and baseband VGAs.
The gain control is applied in parallel to all VGAs. The gain control voltage range is from 0.2 V
to 1.2 V and corresponds to a gain range from +39.5 dB to –30 dB. This is the gain to the output
of the baseband VGAs (i.e., QMXO and IMXO). There is an additional 30 dB of gain in the
baseband amplifiers. Note that the gain control function has a negative sense (i.e., increasing
control voltage decreases gain). In AGC mode, this pin is connected directly to VAGC.
Detector Inputs. These pin are the inputs to the on-board detector. VDT2 and VDT1, which
have high input impedances, are normally connected to IMXO and QMXO respectively.
AGC Output. This pin provides the output voltage from the on-board detector. In AGC mode,
this pin is connected directly to VGIN.
Positive Supply for Biasing and Baseband Sections. This pin should be decoupled with 0.1
μ
F
and 100 pF capacitors.
Q Channel Baseband Amplifier Input. This pin, which has a high input impedance, should be
biased to VREF (approximately 1 V). If QAIN is connected directly to QMXO, biasing will be
provided by QMXO. If an ac-coupled filter is placed between QMXO and QAIN, this pin can
be biased from VREF through a 1 k
resistor. The gain from QAIN to the differential outputs
QOPN/QOPP is 30 dB.
Q Channel Differential Baseband Output. Typical output swing is equal to 1 V p-p differential.
The common-mode level on these pins is programmed by the voltage on VCMO.
LO Section Ground
2
3, 4
VPS1
IOPN, IOPP
B
5
VCMO
C
6
IAIN
D
7, 23
8, 22
COM3
IMXO, QMXO
B
9
10, 11
COM2
RFIN, RFIP
E
12
13, 16
VPS2
IOFS, QOFS
F
14
VREF
G
15
17
ENBL
VGIN
H
C
18, 20
VDT2, VDT1
D
19
VAGC
I
21
VPS3
24
QAIN
D
25, 26
QOPP, QOPN
B
27
COM1
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| AD8347ARU-REEL7 | 功能描述:IC QUADRATURE DEMOD 28-TSSOP RoHS:否 类别:RF/IF 和 RFID >> RF 解调器 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:解调器 LO 频率:- RF 频率:70MHz ~ 300MHz P1dB:-9dBm 增益:- 噪音数据:6.36dB 电流 - 电源:41.5mA 电源电压:2.7 V 封装/外壳:28-WFQFN 裸露焊盘 供应商设备封装:28-TQFN-EP（5x5） 包装:带卷 (TR) |
| AD8347ARUZ | 功能描述:IC QUADRATURE DEMOD 28-TSSOP RoHS:是 类别:RF/IF 和 RFID >> RF 解调器 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:解调器 LO 频率:- RF 频率:70MHz ~ 300MHz P1dB:-9dBm 增益:- 噪音数据:6.36dB 电流 - 电源:41.5mA 电源电压:2.7 V 封装/外壳:28-WFQFN 裸露焊盘 供应商设备封装:28-TQFN-EP（5x5） 包装:带卷 (TR) |
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| AD8347ARUZ-REEL7 | 功能描述:IC QUADRATURE DEMOD 28-TSSOP TR RoHS:是 类别:RF/IF 和 RFID >> RF 解调器 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:解调器 LO 频率:- RF 频率:70MHz ~ 300MHz P1dB:-9dBm 增益:- 噪音数据:6.36dB 电流 - 电源:41.5mA 电源电压:2.7 V 封装/外壳:28-WFQFN 裸露焊盘 供应商设备封装:28-TQFN-EP（5x5） 包装:带卷 (TR) |
| AD8347-EVAL | 制造商:Analog Devices 功能描述:EVALUATION BOARD ((NS)) |
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