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参数资料
| 型号： | MAX1287EKA-T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | ADC |
| 英文描述： | 150ksps, 12-Bit, 2-Channel Single-Ended, and 1-Channel True-Differential ADCs in SOT23 |
| 中文描述： | 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
| 封装： | MO-178, SOT-23, 8 PIN |
| 文件页数： | 14/15页 |
| 文件大小： | 241K |
| 代理商： | MAX1287EKA-T |
M
150ksps, 12-Bit, 2-Channel S ingle-Ended, and
1-Channel True-Differential ADCs in S OT 23
14
______________________________________________________________________________________
Aperture Definitions
Aperture jitter (t
AJ
) is the sample-to-sample variation in
the time between the samples. Aperture delay (t
AD
) is
the time between the rising edge of the sampling clock
and the instant when an actual sample is taken.
S ignal-to-Noise Ratio
For a waveform perfectly reconstructed from digital sam-
ples, 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: 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.
S ignal-to-Noise Plus Distortion
Signal-to-noise 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 (Signal
RMS
/ Noise
RMS
)
Effec tive 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
T otal Harmonic Distortion
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 V
1
is the fundamental amplitude, and V
2
through
V
5
are the amplitudes of the 2nd- through 5th-order har-
monics.
S purious-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.
Chip Information
TRANSISTOR COUNT: 6922
PROCESS: BiCMOS
THD
V
V
V
V
V
=
×
+
+
+
20
2
3
4
5
2
2
2
2
1
log
V
LOGIC
= +5V
OR +3V
GND
SUPPLIES
DGND
+5V OR
+3V
GND
0.1
μ
F
V
DD
DIGITAL
CIRCUITRY
MAX1286
–
MAX1289
R* = 5
*OPTIONAL
+5V OR
+3V
Figure 11. Power-Supply and Grounding Connections
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| MAX1289EKA-T | 150ksps, 12-Bit, 2-Channel Single-Ended, and 1-Channel True-Differential ADCs in SOT23 |
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| MAX1286EKA-T | 150ksps, 12-Bit, 2-Channel Single-Ended, and 1-Channel True-Differential ADCs in SOT23 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1287ETA+ | 制造商:Maxim Integrated Products 功能描述:ADC SGL SAR 150KSPS 12-BIT SERL 8TDFN EP - Rail/Tube |
| MAX1287ETA+T | 功能描述:模数转换器 - ADC 12-Bit 2Ch 150ksps 3.6V Precision 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 |
| MAX1288EKA | 制造商:Maxim Integrated Products 功能描述:150KSPS, 12-BIT, 2-CHANNEL SINGLE-ENDED, AND - Cut Tape Product |
| MAX1288EKA-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 |
| MAX1288ETA+ | 制造商:Maxim Integrated Products 功能描述:ADC SGL SAR 150KSPS 12-BIT SERL 8TDFN EP - Rail/Tube |
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