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參數(shù)資料
| 型號： | MAX1448EHJ+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 9/21頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 10BIT 80MSPS 32-TQFP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 360 |
| 位數(shù)： | 10 |
| 采樣率（每秒）： | 80M |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉換器數(shù)目： | 1 |
| 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： | 32-TQFP |
| 供應商設備封裝： | 32-TQFP（5x5） |
| 包裝： | 托盤 |
| 輸入數(shù)目和類型： | 2 個單端，雙極；1 個差分，雙極 |
MAX1448
10-Bit, 80Msps, Single 3.0V, Low-Power
ADC with Internal Reference
______________________________________________________________________________________
17
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 exter-
nal reference sources. Followed by a 10Hz lowpass fil-
ter and precision voltage-divider (Figure 11), the
MAX6066 generates 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 provides low noise and low DC offset.
The individual voltage followers are connected to 10Hz
lowpass filters, which filter 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 sequencing 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.
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
MAX1448
N = 1
MAX6066
1/4 MAX4252
REFOUT
29
N.C.
REFIN
31
REFP
32
REFN
1
COM
2
0.1F
MAX1448
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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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1448EHJ+ | 功能描述:模數(shù)轉換器 - ADC 10-Bit 80Msps 3V High Speed ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1448EHJ+T | 功能描述:模數(shù)轉換器 - ADC 10-Bit 80Msps 3V High Speed ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1448EHJ-T | 功能描述:模數(shù)轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1448EVKIT | 功能描述:數(shù)據(jù)轉換 IC 開發(fā)工具 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| MAX1449EHJ | 功能描述:模數(shù)轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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