參數(shù)資料
型號(hào)： 73M1966B-EVM
廠商： Maxim Integrated Products
文件頁數(shù)： 53/88頁
文件大小： 0K
描述： BOARD DEMO/MOTH 73M1966 20-TSSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1
系列： *
DS_1x66B_001
73M1866B/73M1966B Data Sheet
Rev. 1.6
57
8.8.1
Transmit and Receive Level Control
Refer to Section 8.5 for information about 73M1x66B levels.
8.8.1.1 Transmit Gain Scaling
The first gain stage in the transmit signal path is the digital gain whose value is controlled by writing to
Register 0x08 (TXDG). The second gain stages are the analog gains that are controlled by Register
0x14[7] (TXBST) and Register 0x14[6:5] (DAA). As a general rule to prevent clipping of the analog gain
stages, it is important to choose a value of the digital gain such that the transmit data after multiplied by
TXDG does not exceed +1.25 dBm. So for correct use of the gain controls the appropriate mix of digital
and analog settings must be used. Generally speaking, for best S/N performance, it is advisable to make
the digital words, after digital gain scaling, as large as possible without going over the +1.25 dBm limit.
Example:
If +2 dBm transmit level is desired for the case where the maximum input is 0 dBm:
Set analog gain to +3 dB (i.e. TXBST and DAA = 0) add attenuation of –1 dB by setting TXDG to
01101100 (-6 + 3.5 + 1 + 0.5 = -1); therefore, +3 - 1 = +2. Note in this case any digital gain could
cause clipping at high input levels in the analog circuitry.
Table 34 lists transmit level analog gain adjustment settings based upon the values of TXBST and DAA.
Table 34: Transmit Gain Control
TXBST
0x14[7]
DAA1
0x14[6]
DAA0
0x14[5]
Gain,
Nom. (dB)
0
+3.0
0
1
0.0
0
1
0
-4.0
0
1
-8.0
1
0
+6.0
1
0
1
+6.0
1
0
+2.0
1
-2.0
Table 35 shows a recommended gain settings for various transmit levels. With 0 dBm of Tx Data and
default setting of DAA1:0 = 01, Txbst=0, TXDG=00h, the transmit level is slightly off at –0.25 dBm.
TXDG=00000010 is required to achieve 0 dBm transmit level. For Tx level > 6 dBm, Tx Data is assumed
less than 0 dBm such that the product of Tx Data and TXDG is less than 1.25 dBm.
Table 35: Recommended Gain Setting
TX Level
Analog Gain
Digital Gain
Ana+Dig
dBm
TxBst DAA1 DAA0 dB
TXDG
dB
-26
0
1
-8
1100_0010
-17.75
-25.75
-25
0
1
-8
1100_1010
-16.75
-24.75
-24
0
1
-8
1101_0010
-15.75
-23.75
-23
0
1
-8
1101_1010
-14.75
-22.75
-22
0
1
-8
1110_0110
-13.75
-21.75
-21
0
1
-8
1110_1110
-12.75
-20.75
-20
0
1
-8
1000_0010
-11.75
-19.75
-19
0
1
-8
1000_1010
-10.75
-18.75
-18
0
1
-8
1001_0010
-9.75
-17.75
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參數(shù)描述
73M1966B-IM/F 制造商:Maxim Integrated Products 功能描述:
73M1966B-KEYCHN 功能描述:網(wǎng)絡(luò)開發(fā)工具 Keychain Eval Module RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評(píng)估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V
73M1AR0015F 功能描述:RES 0.0015 OHM 1% 1W 1206 制造商:cts resistor products 系列:73M1A 包裝:帶卷（TR） 零件狀態(tài):在售 電阻值:1.5 MOhms 容差:±1% 功率（W）:1W 成分:金屬薄膜 特性:電流檢測 溫度系數(shù):±100ppm/°C 工作溫度:-55°C ~ 155°C 封裝/外殼:1206（3216 公制） 供應(yīng)商器件封裝:1206 大小/尺寸:0.126" 長 x 0.063" 寬（3.20mm x 1.60mm） 高度 - 安裝（最大值）:0.035"（0.90mm） 端子數(shù):2 故障率:- 標(biāo)準(zhǔn)包裝:4,000
73M1AR001F 功能描述:RES 0.001 OHM 1% 1W 1206 制造商:cts resistor products 系列:73M1A 包裝:帶卷（TR） 零件狀態(tài):在售 電阻值:1 MOhms 容差:±1% 功率（W）:1W 成分:金屬薄膜 特性:電流檢測 溫度系數(shù):±100ppm/°C 工作溫度:-55°C ~ 155°C 封裝/外殼:1206（3216 公制） 供應(yīng)商器件封裝:1206 大小/尺寸:0.126" 長 x 0.063" 寬（3.20mm x 1.60mm） 高度 - 安裝（最大值）:0.035"（0.90mm） 端子數(shù):2 故障率:- 標(biāo)準(zhǔn)包裝:4,000
73M1AR0025F 功能描述:RES 0.0025 OHM 1% 1W 1206 制造商:cts resistor products 系列:73M1A 包裝:帶卷（TR） 零件狀態(tài):在售 電阻值:2.5 mOhms 容差:±1% 功率（W）:1W 成分:金屬薄膜 特性:電流檢測 溫度系數(shù):±100ppm/°C 工作溫度:-55°C ~ 155°C 封裝/外殼:1206（3216 公制） 供應(yīng)商器件封裝:1206 大小/尺寸:0.126" 長 x 0.063" 寬（3.20mm x 1.60mm） 高度 - 安裝（最大值）:0.035"（0.90mm） 端子數(shù):2 故障率:- 標(biāo)準(zhǔn)包裝:4,000
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