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参数资料
| 型号： | MAX1167-MAX1168 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | Multichannel, 16-Bit, 200ksps Analog-to-Digital Converters |
| 中文描述： | 多通道，16位，速度高达200ksps模拟数字转换器 |
| 文件页数： | 27/30页 |
| 文件大小： | 462K |
| 代理商： | MAX1167-MAX1168 |
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M
Multichannel, 16-Bit, 200ksps Analog-to-Digital
Converters
______________________________________________________________________________________
27
DSP Interface
The DSP mode of the MAX1168 only operates in exter-
nal clock mode. Figure 23 shows a typical DSP interface
connection to the MAX1168. Use the same oscillator as
the DSP to provide the clock signal for the MAX1168.
The DSP provides the falling edge at
CS
to wake the
MAX1168. The MAX1168 detects the state of DSPR on
the falling edge of
CS
(Figure 17). Logic low at DSPR
places the MAX1168 in DSP mode. After the MAX1168
enters DSP mode,
CS
can be left low. A frame sync
pulse from the DSP to DSPR initiates a conversion. The
MAX1168 sends a frame sync pulse from DSPX to the
DSP signaling that the MSB is available at DOUT. Send
another frame sync pulse from the DSP to DSPR to
begin the next conversion. The MAX1168 does not oper-
ate in scan mode when using DSP mode.
Definitions
Integral Nonlinearity
Integral nonlinearity (INL) is the deviation of the values
on an actual transfer function from a straight line. This
straight line can be either a best-straight-line fit or a line
drawn between the end points of the transfer function,
once offset and gain errors have been nullified. The
static linearity parameters for the MAX1167/MAX1168
are measured using the end-point method.
Differential Nonlinearity
Differential nonlinearity (DNL) is the difference between
an actual step-width and the ideal value of ±1 LSB. A
DNL error specification of ±1 LSB guarantees no miss-
ing codes and a monotonic transfer function.
Aperture Definitions
Aperture jitter (t
AJ
) is the sample-to-sample variation in
the time between samples. Aperture delay (t
AD
) is the
time between the falling edge of the sampling clock
and the instant when the actual sample is taken.
Signal-to-Noise Ratio
For a waveform perfectly reconstructed from digital
samples, signal-to-noise ratio (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 analog-to-digital noise is caused by quantization
noise error only and results directly from the ADC
’
s res-
olution (N bits):
SNR = (6.02
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
signal to the RMS noise, which includes all spectral
components minus the fundamental, the first five har-
monics, and the DC offset.
Signal-to-Noise Plus Distortion
Signal-to-noise plus distortion (SINAD) is the ratio of the
fundamental input frequency
’
s RMS amplitude to the
RMS equivalent of all the other ADC output signals:
SINAD (dB) = 20
log [Signal
RMS
/ (Noise +
Distortion)
RMS
]
EFFECTIVE NUMBER OF BITS (ENOB)
FREQUENCY (kHz)
E
10
1
2
4
6
8
10
12
14
16
0
0.1
100
f
SAMPLE
= 200ksps
Figure 24. Effective Bits vs. Frequency
SCLK
DOUT
AGND
DGND
AIN_
REF
AV
DD
DV
DD
DOUT
SCLK
CS
AIN_
+5V
10
1
μ
F
0.1
μ
F
0.1
μ
F
GND
MAX1167
MAX1168
AGND
CS
Figure 25. Powering AV
DD
and DV
DD
from a Single Supply
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1168CEEG | Multichannel, 16-Bit, 200ksps Analog-to-Digital Converters |
| MAX1167ACEE | TRANS NPN 50VCEO 1A TO-92L |
| MAX1167BCEE | TRANS NPN 20VCEO 1A TO-92L |
| MAX1168ACEG | Multichannel, 16-Bit, 200ksps Analog-to-Digital Converters |
| MAX1168BCEG | Multichannel, 16-Bit, 200ksps Analog-to-Digital Converters |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1168 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Multichannel, 16-Bit, 200ksps Analog-to-Digital Converters |
| MAX1168ACEG | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1168ACEG+ | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1168ACEG+T | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1168ACEG-T | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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