參數(shù)資料
型號(hào)： AD9865-EB
廠商： Analog Devices, Inc.
英文描述： Broadband Modem Mixed-Signal Front End
中文描述： 寬帶調(diào)制解調(diào)器混合信號(hào)前端
文件頁(yè)數(shù)： 32/48頁(yè)
文件大?。?/td> 1672K
代理商： AD9865-EB
AD9865
currents. The gain of the secondary path, G, and the TxDAC’s
standing current, I, can be set using the following equation:
Rev. A | Page 32 of 48
IOUT
PK
+ 3 mA =
G
×
I
(6)
The voltage output driver exhibits a high output impedance if
the bias currents for the npn transistors are removed. This
feature is advantageous in half-duplex applications (for
example, power lines) in which the Tx output driver must go
into a high impedance state while in Rx mode. If the AD9865 is
configured for the half-duplex mode (MODE = 0), the IAMP,
TxDAC, and interpolation filter are automatically powered
down after a Tx burst (via TXEN), thus placing the Tx driver
into a high impedance state while reducing its power
consumption.
IAMP CURRENT CONSUMPTION CONSIDERATIONS
The Tx path’s analog current consumption is an important
consideration when determining its contribution to the overall
on-chip power dissipation. This is especially the case in full-
duplex applications, where the power dissipation can exceed the
maximum limit of 1.66 W, if the IAMP’s IOUT
PK
is set to high.
The analog current consumption includes the TxDAC’s analog
supply (Pin 43) along with the standing current from the IAMP’s
outputs. Equation 2 and Equation 5 can be used to calculate the
power dissipated in the IAMP for the current and voltage mode
configuration. Figure 66 shows the current consumption for the
TxDAC and IAMP as a function of the TxDAC’s standing current,
I, when only the IOUTN outputs are used. Figure 67 shows the
current consumption for the TxDAC and IAMP as a function of
the TxDAC’s standing current, I, when the IOUTN and IOUTG
outputs are used. Both figures are with the default current mirror
gain settings of N = 4 and G = 12.
0
I (mA)
I
S
1
2
3
4
5
6
7
8
9
10
11
12
13
100
10
20
30
40
50
60
70
80
90
IAMPN OUTPUT
TxDACs AVDD
Figure 66. Current Consumption of TxDAC and IAMP in Current-Mode
Operation with IOUTN Only (Default IAMP Settings)
0
I (mA)
I
S
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
100
110
120
130
140
150
10
20
30
40
50
60
70
80
90
IOUTN OUTPUT
IOUTG OUTPUT
TxDAC AVDD
Figure 67. Current Consumption of TxDAC and IAMP in Current-Mode
Operation with IOUTN Only (Default IAMP Settings)
相關(guān)PDF資料
PDF描述
AD9865BCP Broadband Modem Mixed-Signal Front End
AD9865BCPRL Broadband Modem Mixed-Signal Front End
AD9865BCPZ1 Broadband Modem Mixed-Signal Front End
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AD9865CHIPS Broadband Modem Mixed-Signal Front End
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD9866 制造商:AD 制造商全稱:Analog Devices 功能描述:Broadband Modem Mixed-Signal Front End
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AD9866BCPRL 制造商:Analog Devices 功能描述:Mixed Signal Front End 64-Pin LFCSP EP T/R
AD9866BCPZ 功能描述:IC PROCESSOR FRONT END 64LFCSP RoHS:是 類別:RF/IF 和 RFID >> RF 前端 (LNA + PA) 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:250 系列:- RF 型:GPS 頻率:1575.42MHz 特點(diǎn):- 封裝/外殼:48-TQFP 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFP 裸露焊盤（7x7） 包裝:托盤
AD9866BCPZRL 功能描述:IC PROCESSOR FRONT END 64LFCSP RoHS:是 類別:RF/IF 和 RFID >> RF 前端 (LNA + PA) 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:250 系列:- RF 型:GPS 頻率:1575.42MHz 特點(diǎn):- 封裝/外殼:48-TQFP 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFP 裸露焊盤（7x7） 包裝:托盤
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