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參數(shù)資料
| 型號： | MAX109 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 運動控制電子 |
| 英文描述： | 8-Bit, 2.2Gsps ADC with Track/Hold Amplifier and 1:4 Demultiplexed LVDS Outputs |
| 中文描述： | 8位、2.2Gsps ADC，提供采樣/保持放大器和1:4解復用LVDS輸出 |
| 文件頁數(shù)： | 26/29頁 |
| 文件大?。?/td> | 451K |
| 代理商： | MAX109 |
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M
supply for the chip should have its own 0.01μF capaci-
tor, which should be placed as close as possible to the
MAX109 for optimum high-frequency noise filtering.
Static/DC Parameter Definitions
Integral Nonlinearity (INL)
Integral nonlinearity is the deviation of the values on an
actual transfer function from a straight line. For the
MAX109, this straight line is between the endpoints of
the transfer function, once offset and gain errors have
been nullified. INL deviations are measured at every
step of the transfer function and the worst-case devia-
tion is reported in the Electrical Characteristics table.
Differential Nonlinearity (DNL)
Differential nonlinearity is the difference between an
actual step width and the ideal value of 1 LSB. A DNL
error specification of less than 1 LSB guarantees no
missing codes and a monotonic transfer function. For
the MAX109, DNL deviations are measured at every
step of the transfer function and the worst-case devia-
tion is reported in the Electrical Characteristics table.
Offset Error
Offset error is a figure of merit that indicates how well
the actual transfer function matches the ideal transfer
function at a single point. Ideally, the mid-scale
MAX109 transition occurs at 0.5 LSB above mid scale.
The offset error is the amount of deviation between the
measured mid-scale transition point and the ideal mid-
scale transition point.
Bit Error Rates
Errors resulting from metastable states may occur when
the analog input voltage (at the time the sample is
taken) falls close to the decision point of any one of the
input comparators. Here, the magnitude of the error
depends on the location of the comparator in the com-
parator network. If it is the comparator for the MSB, the
error will reach full scale. The MAX109’s unique encod-
ing scheme solves this problem by limiting the magni-
tude of these errors to 1 LSB.
Dynamic/AC Parameter
Definitions
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
quantization error (residual error). The ideal theoretical
minimum analog-to-digital noise is caused by quantiza-
tion error only and results directly from the ADC’s reso-
lution (N bits):
SNR[max] = 6.02 x N + 1.76
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
signal to the RMS noise. RMS noise includes all spec-
tral components to the Nyquist frequency excluding the
fundamental, the first 15 harmonics (HD2 through
HD16), and the DC offset:
SNR = 20 x log (SIGNAL
RMS
/ NOISE
RMS
)
Signal-to-Noise Plus Distortion (SINAD)
SINAD is computed by taking the ratio of the RMS sig-
nal to the RMS noise plus distortion. RMS noise plus
8-Bit, 2.2Gsps ADC with Track/Hold Amplifier
and 1:4 Demultiplexed LVDS Outputs
26
______________________________________________________________________________________
330
μ
F
GNDD
V
CC
D
GNDA
V
CC
A
GNDI
V
CC
I
GNDI
1N5817
V
EE
V
CC
A = +4.75V TO +5.25V
V
CC
D = +4.75V TO +5.25V
V
CC
I = +4.75V TO +5.25V
V
CC
O = +3.0V TO V
CC
D
V
EE
= -4.75V TO -5.25V
NOTE:
LOCATE ALL 0.01
μ
F CAPACITORS AS CLOSE AS POSSIBLE TO THE MAX109 DEVICE.
GNDD
V
CC
O
33
μ
F
0.1
μ
F
0.01
μ
F
0.01
μ
F
0.01
μ
F
0.01
μ
F
330
μ
F
33
μ
F
0.1
μ
F
330
μ
F
33
μ
F
0.1
μ
F
0.01
μ
F
0.01
μ
F
0.01
μ
F
0.01
μ
F
330
μ
F
33
μ
F
0.1
μ
F
0.01
μ
F
0.01
μ
F
0.01
μ
F
0.01
μ
F
0.01
μ
F
0.01
μ
F
0.01
μ
F
0.01
μ
F
0.01
μ
F
0.01
μ
F
330
μ
F
33
μ
F
0.1
μ
F
Figure 17. MAX109 Decoupling and Bypassing
Recommendations
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| MAX1090 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface |
| MAX1090ACEI | 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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| MAX1090ACEI+T | 功能描述:模數(shù)轉換器 - ADC 400ksps 8Ch 10-Bit w/Internal 2.5V ref 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 |
| MAX1090ACEI-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 |
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