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參數(shù)資料
| 型號： | MAX1198 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dual, 8-Bit, 100Msps, 3.3V, Low-Power ADC with Internal Reference and Parallel Outputs |
| 中文描述： | 雙路、8位、100Msps、3.3V、低功耗ADC，內(nèi)置電壓基準(zhǔn)及并行輸出 |
| 文件頁數(shù)： | 18/22頁 |
| 文件大?。?/td> | 557K |
| 代理商： | MAX1198 |
M
shifted with respect to the in-phase component. At the
receiver, the QAM signal is divided down into its I and
Q components, essentially representing the modulation
process reversed.
Figure 10 displays the demodulation
process performed in the analog domain, using the
dual matched 3.3V, 8-bit ADC MAX1198 and the
MAX2451 quadrature demodulator to recover and
digitize the I and Q baseband signals. Before being
digitized by the MAX1198, the mixed down-signal com-
ponents may be filtered by matched analog filters, such
as Nyquist or pulse-shaping filters, which 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 MAX1198 requires high-speed board layout design
techniques. Locate all bypass capacitors as close to
the device as possible, preferably on the same side as
the ADC, using surface-mount devices for minimum
inductance. Bypass V
DD
, REFP, REFN, and COM with
two parallel 0.1μF ceramic capacitors and a 2.2μF
bipolar capacitor to GND. Follow the same rules to
bypass the digital supply (OV
DD
) to OGND. Multilayer
boards with separated ground and power planes
produce the highest level of signal integrity. Consider
the use of a split ground plane arranged to match the
Dual, 8-Bit, 100Msps, 3.3V, Low-Power ADC
with Internal Reference and Parallel Outputs
18
______________________________________________________________________________________
1/4 MAX4252
MAX6066
1/4 MAX4252
1/4 MAX4252
1.47k
21.5k
21.5k
21.5k
21.5k
21.5k
47
3.3V
3.3V
11
2
2
3
4
1
1
REFOUT
REFP
REFN
REFIN
1
μ
F
10
μ
F
6V
MAX1198
N = 1
29
N.C.
N.C.
31
32
1
2
29
31
32
1
2
COM
REFOUT
NOTE: ONE FRONT-END REFERENCE CIRCUIT DESIGN MAY BE USED WITH UP TO 32 ADCs.
REFP
REFN
REFIN
MAX1198
N = 32
COM
2.0V AT 8mA
3
0.1
μ
F
0.1
μ
F
MAX4254 POWER-SUPPLY
BYPASSING. PLACE CAPACITOR
AS CLOSE AS POSSIBLE TO
THE OP AMP.
3.3V
1.47k
47
3.3V
1.5V
11
6
5
4
7
10
μ
F
6V
1.5V AT 0mA
1.47k
47
3.3V
11
9
10
4
8
10
μ
F
6V
0.1
μ
F
0.1
μ
F
0.1
μ
F
0.1
μ
F
0.1
μ
F
2.2
μ
F
10V
0.1
μ
F
0.1
μ
F
1.0V AT -8mA
330
μ
F
6V
330
μ
F
6V
330
μ
F
6V
2.0V
1.0V
Figure 9. External Unbuffered Reference Drive with MAX4252 and MAX6066
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1198E/D | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC DICE SALES DICE 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 |
| MAX1198ECM+D | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8-Bit 2Ch 100Msps 3.3V High Speed 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 |
| MAX1198ECM+TD | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8-Bit 2Ch 100Msps 3.3V High Speed 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 |
| MAX1198ECM-D | 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 |
| MAX1198ECM-TD | 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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