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參數(shù)資料
| 型號： | MAX1446EHJ+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 6/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 10BIT 60MSPS 32-TQFP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 位數(shù)： | 10 |
| 采樣率（每秒）： | 60M |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)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(yīng)商設(shè)備封裝： | 32-TQFP（5x5） |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 2 個單端，雙極；1 個差分，雙極 |
MAX1446
10-Bit, 60Msps, 3.0V, Low-Power
ADC with Internal Reference
14
______________________________________________________________________________________
samples at the falling edge of the input clock. Output
data is valid on the rising edge of the input clock. The
output data has an internal latency of 5.5 clock cycles.
Figure 6 also shows the relationship between the input
clock parameters and the valid output data.
Applications Information
Figure 7 shows a typical application circuit containing a
single-ended to differential converter. The internal refer-
ence provides a VDD/2 output voltage for level shifting
purposes. The input is buffered and then split to a volt-
age follower and inverter. A lowpass filter follows the op
amps to suppress some of the wideband noise associ-
ated with high-speed op amps. The user may select the
RISO and CIN values to optimize the filter performance
to suit a particular application. For the application in
Figure 7, an RISO of 50Ω is placed before the capaci-
tive load to prevent ringing and oscillation. The 22pF
CIN capacitor acts as a small bypassing capacitor.
Using Transformer Coupling
An RF transformer (Figure 8) provides an excellent
solution for converting a single-ended source signal to
a fully differential signal, required by the MAX1446 for
optimum performance. Connecting the transformer’s
center tap to COM provides a VDD/2 DC level shift to
the input. Although a 1:1 transformer is shown, a step-
up transformer may be selected to reduce the drive
requirements. A reduced signal swing from the input
driver, such as an op amp, may also improve the over-
all distortion.
In general, the MAX1446 provides better SFDR and
THD with fully differential input signals than single-
ended drive, especially for very high input frequencies.
In differential input mode, even-order harmonics are
lower since both inputs (IN+, IN-) are balanced, and
each of the inputs only requires half the signal swing
compared to single-ended mode.
Single-Ended AC-Coupled
Input Signal
Figure 9 shows an AC-coupled, single-ended applica-
tion. The MAX4108 op amp provides high speed, high
bandwidth, low noise, and low distortion to maintain the
integrity of the input signal.
Buffered External Reference Drives
Multiple ADCs
Multiple-converter systems based on the MAX1446 are
well suited for use with a common reference voltage.
The REFIN pin of those converters can be connected
directly to an external reference source. A precision
bandgap reference like the MAX6062 generates an
external DC level of 2.048V (Figure 10), and exhibits a
noise voltage density of 150n
√Hz. Its output passes
through a 1-pole lowpass filter (with 10Hz cutoff fre-
quency) to the MAX4250, which buffers the reference
before its output is applied to a second 10Hz lowpass
N - 6
N
N - 5
N + 1
N - 4
N + 2
N - 3
N + 3
N - 2
N + 4
N - 1
N + 5
N
N + 6
N + 1
5.5 CLOCK-CYCLE LATENCY
ANALOG INPUT
CLOCK INPUT
DATA OUTPUT
tDO
Figure 6. System and Output Timing Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1446GHJ+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 60Msps 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 |
| MAX1446GHJ+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 60Msps 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 |
| MAX1447ECJ | 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 |
| MAX1447ECJ+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 4.5-Digit 5sps ADC w/LED Drivers 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 |
| MAX1447ECJ+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 4.5-Digit 5sps ADC w/LED Drivers 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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