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參數(shù)資料
| 型號： | MAX19192ETI+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 13/22頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 8BIT DUAL 10MSPS 28-TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 60 |
| 位數(shù)： | 8 |
| 采樣率（每秒）： | 10M |
| 轉(zhuǎn)換器數(shù)目： | 2 |
| 功率耗散（最大）： | 1.67W |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 28-TQFN-EP（5x5） |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 4 個單端，單極；2 個差分，單極 |
MAX19192
Ultra-Low-Power, 10Msps, Dual 8-Bit ADC
20
______________________________________________________________________________________
Typical QAM Demodulation Application
Quadrature amplitude modulation (QAM) is frequently
used in digital communications. Typically found in
spread-spectrum-based systems, a QAM signal repre-
sents a carrier frequency modulated in both amplitude
and phase. At the transmitter, modulating the baseband
signal with quadrature outputs, a local oscillator fol-
lowed by subsequent upconversion can generate the
QAM signal. The result is an in-phase (I) and a quadra-
ture (Q) carrier component, where the Q component is
90° phase shifted with respect to the in-phase compo-
nent. At the receiver, the QAM signal is demodulated
into analog I and Q components. Figure 12 displays the
demodulation process performed in the analog domain
using the MAX19192 dual-matched, 3V, 8-bit ADC and
the MAX2451 quadrature demodulator to recover and
digitize the I and Q baseband signals. Before being dig-
itized by the MAX19192, the mixed-down signal compo-
nents can be filtered by matched analog filters, such as
Nyquist or pulse-shaping filters. The filters remove
unwanted images from the mixing process, thereby
enhancing the overall signal-to-noise (SNR) perfor-
mance and minimizing intersymbol interference.
Grounding, Bypassing,
and Board Layout
The MAX19192 requires high-speed board layout
design techniques. Refer to the MAX19192 evaluation
kit data sheet for a board layout reference. Locate all
bypass capacitors as close as possible to the device,
preferably on the same side as the ADC, using surface-
mount devices for minimum inductance. Bypass VDD to
GND with a 0.1F ceramic capacitor in parallel with a
2.2F bipolar capacitor. Bypass OVDD to OGND with a
0.1F ceramic capacitor in parallel with a 2.2F bipolar
capacitor. Bypass REFP, REFN, and COM each to
GND with a 0.33F ceramic capacitor.
Multilayer boards with separated ground and power
planes produce the highest level of signal integrity. Use
a split ground plane arranged to match the physical
location of the analog ground (GND) and the digital
output driver ground (OGND) on the ADC’s package.
Connect the MAX19192 exposed backside pad to
GND. Join the two ground planes at a single point so
that the noisy digital ground currents do not interfere
with the analog ground plane. The ideal location of this
connection can be determined experimentally at a
point along the gap between the two ground planes,
which produces optimum results. Make this connection
with a low-value, surface-mount resistor (1
Ω to 5Ω), a
ferrite bead, or a direct short. Alternatively, all ground
pins could share the same ground plane, if the ground
plane is sufficiently isolated from any noisy, digital sys-
tems ground plane (e.g., downstream output buffer or
DSP ground plane).
Route high-speed digital signal traces away from the
sensitive analog traces of either channel. Make sure to
isolate the analog input lines to each respective con-
verter to minimize channel-to-channel crosstalk. Keep
all signal lines short and free of 90
° turns.
0
°
90
°
÷8
DOWNCONVERTER
MAX2451
INA+
MAX19192
INA-
INB+
INB-
DSP
POST-
PROCESSING
A/B
Figure 12. Typical QAM Receiver Application
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX19192ETI/V+ | 制造商:Maxim Integrated Products 功能描述:ANALOG TO DIGITAL CONVERTER - Rail/Tube |
| MAX19192ETI/V+T | 制造商:Maxim Integrated Products 功能描述:ULTRA-LOW-POWER, 10MSPS, DUAL 8-BIT ADC - Tape and Reel |
| MAX19192ETI+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Integrated Circuits (ICs) Analog to Digital Converters - IC ADC 8BIT DUAL 10MSPS 28-TQFN RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX19192ETI+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Integrated Circuits (ICs) Analog to Digital Converters - IC ADC 8BIT DUAL 10MSPS 28-TQFN RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX191ACNG | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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