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參數(shù)資料
| 型號： | MAX1446 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 10-Bit, 60Msps, 3.0V, Low-Power ADC with Internal Reference |
| 中文描述： | 10位、60Msps、3.0V、低功耗ADC，內(nèi)置基準(zhǔn) |
| 文件頁數(shù)： | 15/16頁 |
| 文件大?。?/td> | 282K |
| 代理商： | MAX1446 |
M
10-Bit, 60Msps, 3.0V, Low-Power
ADC with Internal Reference
______________________________________________________________________________________
15
Differential Nonlinearity
Differential nonlinearity (DNL) is the difference between
an actual step width and the ideal value of 1LSB. A
DNL error specification of less than 1LSB guarantees
no missing codes and a monotonic transfer function.
Dynamic Parameter Definitions
Aperture Jitter
Figure 10 depicts the aperture jitter (t
AJ
), which is the
sample-to-sample variation in the aperture delay.
Aperture Delay
Aperture delay (t
AD
) is the time defined between the
falling edge of the sampling clock and the instant when
an actual sample is taken (Figure 10).
Signal-to-Noise Ratio (SNR)
For a waveform perfectly reconstructed from digital
samples, the theoretical maximum SNR is the ratio of
the full-scale analog input (rms value) to the rms quanti-
zation error (residual error). The ideal, theoretical mini-
mum A/D noise is caused by quantization error only
and results directly from the ADC
’
s resolution (N bits):
SNR
(MAX)
= (6.02 x N + 1.76)dB
In reality, there are other noise sources besides quanti-
zation noise: thermal noise, reference noise, clock jitter,
etc. SNR is computed by taking the ratio of the rms sig-
nal to the rms noise, which includes all spectral compo-
nents minus the fundamental, the first five harmonics,
and the DC offset.
Signal-to-Noise Plus Distortion (SINAD)
SINAD is computed by taking the ratio of the rms signal
to all spectral components minus the fundamental and
the DC offset.
Effective Number of Bits (ENOB)
ENOB specifies the dynamic performance of an ADC at
a specific input frequency and sampling rate. An ideal
ADC
’
s error consists of quantization noise only. ENOB
is computed from:
ENOB = (SINAD - 1.76dB) / 6.02dB
MAX1446
T1
N.C.
V
IN
6
1
5
2
4
3
22pF
22pF
0.1
μ
F
0.1
μ
F
2.2
μ
F
25
25
MINICIRCUITS
TT1
–
6
IN-
IN+
COM
Figure 8. Using a Transformer for AC-Coupling
MAX1446
0.1
μ
F
1k
1k
100
100
C
IN
COM
C
IN
IN+
IN-
0.1
μ
F
R
ISP
R
ISO
REFP
REFN
R
ISO
= 50
C
IN
= 22pF
V
IN
MAX4108
Figure 9. Single-Ended AC-Coupled Input
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|---|---|
| MAX1446EHJ | 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 |
| MAX1446EHJ+ | 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 |
| MAX1446EHJ+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 |
| MAX1446EHJ-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 |
| 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 |
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