参数资料
型号: MAX1280BEUP+T
厂商: Maxim Integrated Products
文件页数: 14/24页
文件大小: 0K
描述: IC ADC 12BIT 400KSPS 20-TSSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
位数: 12
采样率(每秒): 400k
数据接口: MICROWIRE?,QSPI?,串行,SPI?
转换器数目: 1
功率耗散(最大): 559mW
电压电源: 单电源
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 20-TSSOP
包装: 带卷 (TR)
输入数目和类型: 8 个单端,单极;8 个单端,双极;4 个伪差分,单极;4 个伪差分,双极
MAX1280/MAX1281
400ksps/300ksps, Single-Supply, Low-Power, 8-Channel,
Serial 12-Bit ADCs with Internal Reference
______________________________________________________________________________________
21
Aperture Delay
Aperture delay (tAD) is the time defined between the
falling edge of the sampling clock and the instant when
an 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 full-
scale analog input (RMS value) to the RMS quantization
error (residual error). The ideal theoretical minimum
analog-to-digital noise is caused by quantization error
only and results directly from the ADC’s resolution (N
bits):
SNR = (6.02
N + 1.76)dB
In reality, there are other noise sources besides quanti-
zation noise, including thermal noise, reference noise,
clock jitter, etc. Therefore, SNR is calculated by taking
the ratio of the RMS signal to the RMS noise, which
includes all spectral components minus the fundamen-
tal, the first five harmonics, and the DC offset.
Signal-to-Noise Plus Distortion
Signal-to-noise ratio plus distortion (SINAD) is the ratio
of the fundamental input frequency’s RMS amplitude to
RMS equivalent of all other ADC output signals.
SINAD (dB) = 20
log (SignalRMS / NoiseRMS)
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
MAX1280
MAX1281
MC683XX
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
SHDN
VDD2
VDD1
SCLK
CS
DIN
SSTRB
DOUT
GND
REFADJ
REF
VDD1
(POWER SUPPLIES)
SCK
PCS0
MOSI
MISO
0.1
F
10
F
(GND)
4.7
F
0.01
F
ANALOG
INPUTS
+3V OR +5V
Figure 17. QSPI Connections
XF
CLKX
CLKR
DX
DR
FSR
CS
SCLK
DIN
DOUT
SSTRB
TMS320LC3x
MAX1280
MAX1281
Figure 18. MAX1280/MAX1281-to-TMS320 Serial Interface
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