参数资料
型号: MAX1280BEUP+T
厂商: Maxim Integrated Products
文件页数: 15/24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
Effective Number of Bits
Effective number of bits (ENOB) indicates the global
accuracy of an ADC at a specific input frequency and
sampling rate. An ideal ADC’s error consists of quanti-
zation noise only. With an input range equal to the full-
scale range of the ADC, calculate the effective number
of bits as follows:
ENOB = (SINAD - 1.76) / 6.02
Total Harmonic Distortion (THD)
Total harmonic distortion (THD) is the ratio of the RMS
sum of the first five harmonics of the input signal to the
fundamental itself. This is expressed as:
where V1 is the fundamental amplitude, and V2 through
V5 are the amplitudes of the 2nd- through 5th-order har-
monics, respectively.
Spurious-Free Dynamic Range
Spurious-free dynamic range (SFDR) is the ratio of RMS
amplitude of the fundamental (maximum signal compo-
nent) to the RMS value of the next-largest distortion
component.
THD
20
log
V
VVV
V
2
3
2
4
2
4
2
5
2
1
+
+++
MAX1280/MAX1281
400ksps/300ksps, Single-Supply, Low-Power, 8-Channel,
Serial 12-Bit ADCs with Internal Reference
22
______________________________________________________________________________________
SCLK
DIN
DOUT
SSTRB
SEL2
START
SEL1
SEL0
PD1
PD0
CS
UNI/BIP SGI/DIF
B10
B1
MSB
B0
HIGH IMPEDANCE
Figure 19. MAX1280/MAX1281-to-TMS320 Serial Interface
VDD
I/O
SCK (SK)
MOSI (SO)
MISO (SI)
VSS
SSTRB
DOUT
DIN
SCLK
COM
GND
VDD2
VDD1
CH8
4.7
F
0.1
F
CH0
0 TO
+2.5V
ANALOG
INPUTS
MAX1280
MAX1281
CPU
SHDN
CS
+5V OR
+3V
REF
0.01
F
REFADJ
Typical Operating Circuit
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