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參數(shù)資料
| 型號(hào)： | MAX1449EHJ+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 9/21頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 10BIT 105MSPS 32-TQFP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 360 |
| 位數(shù)： | 10 |
| 采樣率（每秒）： | 105M |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-TQFP |
| 供應(yīng)商設(shè)備封裝： | 32-TQFP（5x5） |
| 包裝： | 托盤 |
| 輸入數(shù)目和類型： | 2 個(gè)單端，雙極；1 個(gè)差分，雙極 |
Unbuffered External Reference Drives
Multiple ADCs
Connecting each REFIN to analog ground disables the
internal reference of each device, allowing the internal
reference ladders to be driven directly by a set of external
reference sources. Followed by a 10Hz lowpass filter and
precision voltage-divider (Figure 11), the MAX6066 gen-
erates a DC level of 2.500V. The buffered outputs of this
divider are set to 2.0V, 1.5V, and 1.0V, with an accuracy
that depends on the tolerance of the divider resistors. The
three voltages are buffered by the MAX4252, which pro-
vides low noise and low DC offset. The individual voltage
followers are connected to 10Hz lowpass filters, which fil-
ter both the reference voltage and amplifier noise to a
level of 3nV/√Hz. The 2.0V and 1.0V reference voltages
set the differential full-scale range of the associated
ADCs at 2VP-P. The 2.0V and 1.0V buffers drive the
ADC’s internal ladder resistances between them. Note
that the common power supply for all active components
removes any concern regarding power-supply sequenc-
ing when powering up or down. With the outputs of the
MAX4252 matching better than 0.1%, the buffers and
subsequent lowpass filters can be replicated to support
as many as 32 ADCs. For applications that require more
than 32 matched ADCs, a voltage reference and divider
string common to all converters is highly recommended.
MAX1449
10-Bit, 105Msps, Single 3.3V, Low-Power
ADC with Internal Reference
______________________________________________________________________________________
17
REFOUT
29
N.C.
REFIN
31
REFP
32
REFN
1
COM
2
0.1F
330F
6V
330F
6V
330F
6V
10F
6V
11
4
3
2
3
1
2
1
MAX1449
N = 1
MAX6066
1/4 MAX4252
REFOUT
29
N.C.
REFIN
31
REFP
32
REFN
1
COM
2
0.1F
MAX1449
N = 32
47
2.0V AT 8mA
1.47k
21.5k
3.3V
1F
21.5k
NOTE: ONE FRONT-END REFERENCE CIRCUIT DESIGN MAY BE USED WITH UP TO 32 ADCs.
2.2F
10V
0.1F
3.3V
2.0V
10F
6V
11
4
5
6
7
1/4 MAX4252
47
1.5V AT 0mA
1.47k
3.3V
10F
6V
11
4
10
9
8
1/4 MAX4252
47
1.0V AT -8mA
1.47k
3.3V
MAX4254 POWER-SUPPLY BYPASSING.
PLACE CAPACITOR AS CLOSE AS
POSSIBLE TO THE OP AMP.
0.1F
1.5V
1.0V
Figure 11. Unbuffered External Reference Drives Up to 32 ADCs
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1449EHJ+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 105Msps 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 |
| MAX1449EHJ+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 105Msps 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 |
| MAX1449EHJ-T | 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 |
| MAX144ACPA | 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 |
| MAX144ACPA+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 2Ch 108ksps 5.25V 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 |
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