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参数资料
| 型号： | MAX1396MUB+T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | ADC |
| 英文描述： | 1.5V to 3.6V, 312.5ksps, 1-Channel True-Differential/2-Channel Single-Ended, 12-Bit, SAR ADCs |
| 中文描述： | 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10 |
| 封装： | MO-187C-BA, MICRO SOP-10 |
| 文件页数： | 7/19页 |
| 文件大小： | 1037K |
| 代理商： | MAX1396MUB+T |
Signal-to-Noise Ratio (SNR)
SNR is a dynamic figure of merit that indicates the con-
verter’s noise performance. 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 quantization error only and results
directly from the ADC’s resolution (N bits):
SNRdB[max] = 6.02dB x N + 1.76dB
In reality, there are other noise sources such as thermal
noise, reference noise, and clock jitter that also
degrade SNR. SNR is computed by taking the ratio of
the RMS signal to the RMS noise. RMS noise includes
all spectral components to the Nyquist frequency
excluding the fundamental, the first five harmonics, and
the DC offset.
Total Harmonic Distortion (THD)
THD is a dynamic figure of merit that indicates how much
harmonic distortion the converter adds to the signal.
THD is the ratio of the RMS sum of the first five harmon-
ics of the fundamental signal to the fundamental itself.
This is expressed as:
where V1 is the fundamental amplitude, and V2 through
V6 are the amplitudes of the 2nd- through 6th-order
harmonics.
Spurious-Free Dynamic Range (SFDR)
SFDR is a dynamic figure of merit that indicates the
lowest usable input signal amplitude. SFDR is the ratio
of the RMS amplitude of the fundamental (maximum
signal component) to the RMS value of the next-largest
spurious component, excluding DC offset. SFDR is
specified in decibels relative to the carrier (dBc).
Intermodulation Distortion (IMD)
IMD is the ratio of the RMS sum of the intermodulation
products to the RMS sum of the two fundamental input
tones. This is expressed as:
The fundamental input tone amplitudes (V1 and V2) are
at -6.5dBFS. Fourteen intermodulation products (VIM_)
are used in the MAX1393/MAX1396 IMD calculation.
The intermodulation products are the amplitudes of the
output spectrum at the following frequencies, where fIN1
and fIN2 are the fundamental input tone frequencies:
2nd-order intermodulation products:
fIN1 + fIN2, fIN2 - fIN1
3rd-order intermodulation products:
2 x fIN1 - fIN2, 2 x fIN2 - fIN1, 2 x fIN1 + fIN2, 2 x fIN2 + fIN1
4th-order intermodulation products:
3 x fIN1 - fIN2, 3 x fIN2 - fIN1, 3 x fIN1 + fIN2, 3 x fIN2 + fIN1
5th-order intermodulation products:
3 x fIN1 - 2 x fIN2, 3 x fIN2 - 2 x fIN1, 3 x fIN1 + 2 x
fIN2, 3 x fIN2 + 2 x fIN1
Channel-to-Channel Crosstalk
Channel-to-channel crosstalk indicates how well each
analog input is isolated from the others. The channel-to-
channel crosstalk for the MAX1396 is measured by
applying DC to channel 2 while an AC sine wave is
applied to channel 1. An FFT is taken for channel 1 and
channel 2 and the difference (in dB) is reported as the
channel-to-channel crosstalk.
Aperture Delay
The MAX1393/MAX1396 sample data on the falling
edge of its third SCLK cycle (Figure 14). In actuality,
there is a small delay between the falling edge of the
sampling clock and the actual sampling instant.
Aperture delay (tAD) is the time defined between the
IMD
VV
V
VV
IM
IMN
log
.....
=×
++
+
20
1
2
3
22
1
2
THD
VVVVV
V
log
=×
++++
20
2
3
2
4
2
5
2
6
2
1
MAX1393/MAX1396
______________________________________________________________________________________
15
1.5V to 3.6V, 312.5ksps, 1-Channel True-Differential/
2-Channel Single-Ended, 12-Bit, SAR ADCs
10
(OPTIONAL)
VDD
POWER SUPPLY
GND
DIGITAL
CIRCUITRY
GND
DGND
DATA
STAR
GROUND
POINT
DVDD
VDD
MAX1393/MAX1396
Figure 13. Power-Supply Grounding Connections
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1396MUB+ | 1.5V to 3.6V, 312.5ksps, 1-Channel True-Differential/2-Channel Single-Ended, 12-Bit, SAR ADCs |
| MAX1416AEWE+ | 16-Bit, Low-Power, 2-Channel, Sigma-Delta ADCs |
| MAX1457AWI+T | 0.1% Accurate Signal Conditioner for Piezoresistive Sensor Compensation |
| MAX1457AWI+ | 0.1% Accurate Signal Conditioner for Piezoresistive Sensor Compensation |
| MAX1459CAP+T | 2-Wire, 4-20mA Smart Signal Conditioner |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX139C/D | 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 |
| MAX139CMH | 制造商:Maxim Integrated Products 功能描述:44 PINS MQFP PKG - Bulk |
| MAX139CMH+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX139CMH+D | 功能描述:模数转换器 - ADC 3 1/2 Dgt ADC w/Ref CPump LED Drivers 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 |
| MAX139CMH+T | 制造商:Maxim Integrated Products 功能描述:ADC SGL DUAL SLOPE 3 1/2DIGIT LED 44MQFP - Tape and Reel |
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