- 您現在的位置：買賣IC網 > PDF目錄373944 > AD8348-EVAL (Analog Devices, Inc.) 50-1000 MHz Quadrature Demodulator PDF資料下載
參數資料
| 型號： | AD8348-EVAL |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 50-1000 MHz Quadrature Demodulator |
| 中文描述： | 50-1000兆赫正交解調器 |
| 文件頁數： | 6/13頁 |
| 文件大小： | 778K |
| 代理商： | AD8348-EVAL |
PRELIMINARY TECHNICAL DATA
Rev. PrF 2/11/03
- 6 -
PIN FUNCTION DESCRIPTIONS
Pin
1,28
Name
LOIP,LOIN
Description
Equiv.
Cir.
LO Input. For optimum performance, these inputs should be driven differentially. Typical input drive level is
equal to –10 dBm. To obtain a broadband 50
input impedance, connect a 60.4
shunt resistor between LOIP
and LOIN.
Positive Supply for LO, IF, and Biasing & Baseband sections respectively. Each of these pins should be
decoupled with 0.1 uF and 100 pF capacitors.
I- and Q-channel differential baseband outputs. Typical output swing is equal to 2Vpp differential. The DC
common-mode voltage level on these pins is set by the voltage on VCMO.
Baseband DC common-mode voltage. The voltage applied to this pin sets the DC common-mode levels for all
the baseband outputs and inputs (IMXO, QMXO, IOPP, IOPN, QOPP, QOPN, IAIN and QAIN). This pin can
either be connected to VREF or to a reference voltage from another device, such as an ADC).
I-channel baseband amplifier input. The single-ended signal on this pin is referenced to VCMO and should have
a DC bias equal to the DC voltage on the VCMO pin. If IAIN is DC-coupled 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 20 dB.
Ground for Biasing and Baseband sections.
I- and Q-channel mixer baseband outputs. These are low impedance (40 Ohms) outputs whose bias level is set by
the voltage on the VCMO pin. These pins are typically connected to IAIN and QAIN respectively, either
directly or through a filter. These outputs can drive a maximum current of 2.5 mA
IF Section Ground
IF Input. IFIN should be AC-coupled to ground. The single-ended IF input signal should be AC-coupled into
IFIP. The nominal differential impedance of these pins is 200 Ohms. For a broadband 50
input impedance, a
minimum loss L-pad should be used. R
series
=174 Ohms, R
shunt
=57.6 Ohms.
I- and Q-channel offset nulling inputs. DC offsets on the I-channel mixer output (IMXO) can be nulled by
connecting a 0.1 uF capacitor from IOFS to ground. Driving IOFS with a fixed voltage (typically from a DAC)
can extended the operating frequency range to include DC by nulling out the offset at the baseband outputs.
Reference Voltage Output. This output voltage (1V) 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. Threshold is equal to +Vs/2.
Gain Control Input. The voltage on this pin controls the gain on the RF VGA. The gain control voltage range is
from 0.2 V to 1.2 V and corresponds to a conversion gain range from +25 dB to –18 dB. This is the gain to the
output of the mixers (i.e. QMXO and IMXO). There is an additional 20 dB of gain in the final baseband
amplifiers (IAIN to IOPP/IOPN and QAIN to QOPP/QOPN). Note that the gain control function has a negative
sense (i.e. increasing voltage decreases gain).
Auxiliary mixer inputs. If ENVG is low then the IFIP, IFIN inputs are disabled and MXIP, MXIN are enabled,
allowing the VGA to be bypassed. This is a fully differential input which should be AC coupled to the signal
source.
Q-channel baseband amplifier input. The single-ended signal on this pin is referenced to VCMO and should have
a DC bias equal to the DC voltage on the VCMO pin. If QAIN is DC-coupled 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 20 dB.
Active high VGA enable. When ENVG is high, IFIP, IFIN inputs are enabled and MXIP, MXIN inputs are
disabled. When ENVG is low, MXIP, MXIN inputs are enabled and IFIP, IFIN inputs are disabled.
LO Section Ground
2, 12,
20
3,4,
25, 26
5
VPS1, VPS2,
VPS3
IOPN,IOPP,
QOPP, QOPN
VCMO
6
IAIN
7,22
8,21
COM3
IMXO,
QMXO
9
COM2
IFIN,IFIP
10,
11
13, 16
IOFS, QOFS
14
VREF
15
17
ENBL
VGIN
18,
19
MXIP, MXIN
23
QAIN
24
ENVG
27
COM1
AD8348
相關PDF資料 |
PDF描述 |
|---|---|
| AD8348XXX | 50-1000 MHz Quadrature Demodulator |
| AD8349 | 700 MHz to 2700 MHz Quadrature Modulator |
| AD8349ARE | 700 MHz to 2700 MHz Quadrature Modulator |
| AD8349ARE-REEL7 | 700 MHz to 2700 MHz Quadrature Modulator |
| AD8350 | Low Distortion 1.0 GHz Differential Amplifier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8348-EVALZ | 功能描述:BOARD EVAL FOR AD8348 RoHS:是 類別:編程器，開發系統 >> 評估演示板和套件 系列:* 標準包裝:1 系列:PSoC® 主要目的:電源管理，熱管理 嵌入式:- 已用 IC / 零件:- 主要屬性:- 次要屬性:- 已供物品:板，CD，電源 |
| AD8348XRU | 制造商:Analog Devices 功能描述:QUADRATURE MODULATOR X-GRADE - Rail/Tube |
| AD8348XXX | 制造商:AD 制造商全稱:Analog Devices 功能描述:50-1000 MHz Quadrature Demodulator |
| AD8349 | 制造商:AD 制造商全稱:Analog Devices 功能描述:400 MHz to 6 GHz Broadband Quadrature Modulator |
| AD8349ARE | 制造商:Analog Devices 功能描述:Quadrature Mod 160MHz 16-Pin TSSOP EP Tube 制造商:Rochester Electronics LLC 功能描述:DIRECT QUADRATURE MODULATOR - Bulk 制造商:Analog Devices 功能描述:IC MODULATOR QUADRATURE |
發布緊急采購，3分鐘左右您將得到回復。