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參數(shù)資料
| 型號： | MAX19708ETM+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 11/37頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ANLG FRONT END 11MSPS 48-TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 43 |
| 位數(shù)： | 10 |
| 通道數(shù)： | 4 |
| 功率（瓦特）： | 36.9mW |
| 電壓 - 電源，模擬： | 3V |
| 電壓 - 電源，數(shù)字： | 3V |
| 封裝/外殼： | 48-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 48-TQFN-EP（7x7） |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1398 (CN2011-ZH PDF) |
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MAX19708
10-Bit, 11Msps, Ultra-Low-Power
Analog Front-End
______________________________________________________________________________________
19
quadrature upconverters and the MAX19708. Many RF
upconverters require a 0.9V to 1.4V common-mode bias.
The MAX19708 common-mode DC bias eliminates dis-
crete level-setting resistors and code-generated level
shifting while preserving the full dynamic range of each
Tx DAC. The Tx DAC differential analog outputs cannot
be used in single-ended mode because of the internally
generated common-mode DC level. Table 2 shows the
Tx path output voltage vs. input codes. Table 11 shows
the selection of DC common-mode levels. See Figure 5
for an illustration of the Tx DAC analog output levels.
The buffer amplifiers also feature a programmable full-
scale output level of ±410mV or ±500mV and indepen-
dent DC offset trim on each I/Q channel. Both features
are configured through the SPI interface. The DC offset
correction is used to optimize sideband and carrier sup-
pression in the Tx signal path (see Tables 8 and 10).
Tx DAC Timing
Figure 6 shows the relationship between the clock, input
data, and analog outputs. Data for the I channel (ID) is
latched on the falling edge of the clock signal, and Q-
channel (QD) data is latched on the rising edge of the
clock signal. Both I and Q outputs are simultaneously
updated on the next rising edge of the clock signal.
3-Wire Serial Interface and
Operation Modes
The 3-wire serial interface controls the MAX19708 oper-
ation modes as well as the three 12-bit aux-DACs and
the 10-bit aux-ADC. Upon power-up, program the
MAX19708 to operate in the desired mode. Use the 3-
wire serial interface to program the device for shutdown,
idle, standby, Rx, Tx, aux-DAC controls, or aux-ADC
conversion. A 16-bit data register sets the mode control
as shown in Table 3. The 16-bit word is composed of
A3–A0 control bits and D11–D0 data bits. Data is shifted
in MSB first (D11) and LSB last (A0). Tables 4, 5, and 6
show the MAX19708 operating modes and SPI com-
mands. The serial interface remains active in all modes.
SPI Register Description
Program the control bits, A3–A0, in the register as shown
in Table 3 to select the operating mode. Modify A3–A0
bits to select from ENABLE-16, Aux-DAC1, Aux-DAC2,
Aux-DAC3, IOFFSET, QOFFSET, Aux-ADC, ENABLE-8,
and COMSEL modes. ENABLE-16 is the default operat-
ing mode. This mode allows for shutdown, idle, and
standby states as well as switching between FAST,
SLOW, Rx and Tx modes. Table 4 shows the MAX19708
power-management modes. Table 5 shows the T/
R pin-
controlled external Tx-Rx switching modes. Table 6
shows the SPI-controlled Tx-Rx switching modes.
Figure 4. TD-SCDMA Filter Frequency Response
0.8
CHANNEL EDGE
4.32
IMAGE
1.27
fC
5.12
fCLK
FREQ (MHz)
NOT TO SCALE
-49.3dB
-15dB
-3dB
0dB
-55dB (min)
-57.1dB
OCCUPIED
CHANNEL
AMPLITUDE
TD-SCDMA
FILTER RESPONSE
DAC sin(x)/x
RESPONSE
Tx PATH:
SFDR = 73dBc
THD = -71dB
SNR = 56.5dB
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX19708ETM+ | 功能描述:ADC / DAC多通道 11Msps CODEC/AFE 1.8/2.7-3.3V RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX19708ETM+T | 功能描述:ADC / DAC多通道 11Msps CODEC/AFE 1.8/2.7-3.3V RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX19708ETM-T | 功能描述:ADC / DAC多通道 RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX19708EVCMOD2 | 功能描述:ADC / DAC多通道 Maxim Evaluation System RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX19708EVCMODU | 功能描述:ADC / DAC多通道 10-bit 11Msps Ultra-Low-Power Analog Front-End RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
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