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| 型号： | MAX11040KGUU+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 25/35页 |
| 文件大小： | 0K |
| 描述： | IC ADC 24BIT 4CH 38-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 位数： | 24 |
| 采样率（每秒）： | 3.07M |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 4 |
| 功率耗散（最大）： | 1.1W |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 38-TFSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 38-TSSOP |
| 包装： | 管件 |
| 输入数目和类型： | 4 个差分，双极 |
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MAX11040K/MAX11060
24-/16-Bit, 4-Channel, Simultaneous-Sampling,
Cascadable, Sigma-Delta ADCs
31
Maxim Integrated
DISCONTINUITY DUE TO SYNC EVENT
DRDYOUT
SYNC
MEASURE
tDRYOUT_TO_SYNC
AIN_
RECONSTRUCTED
DIGITAL OUTPUT
PAUSE FOR
tDRYOUT_TO_SYNC
NOTE: THE LATENCY IS NOT TO SCALE.
tDRYOUT_TO_SYNC
1
2
3
4
2
3
4
5
6
1
2
3
4
5
6
tS
Figure 19. Example of Discontinuity in Reconstructed Digital Output Due to SYNC Falling Edge with a Large DRDYOUT-to-SYNC Delay
Signal Distortion at
SYNC Falling Edges
Each SYNC falling edge causes a disruption in the digi-
tal filter timing proportional to the delay from the previ-
ous falling edge of DRDYOUT to the falling edge of
SYNC. Any analysis of the output data that assumes a
uniform sampling period sees an error proportional to
that delay, with a maximum value determined by the
maximum derivative of the analog input. Figure 19
shows the effect of this discontinuity at output sample 5.
Assuming a 60Hz ±2.2V sine wave, the maximum pos-
sible error on any given sample caused by a SYNC
falling edge is:
VERROR_MAX = 2.2V x 2π x 60Hz x tDRDYOUT_TO_SYNC
= 0.83μV/ns x tDRDYOUT_TO_SYNC
The delay from DRDYOUT to SYNC is quantized to
within one cycle of the 24.576MHz clock. SYNC pulses
that are asynchronous to DRDYOUT may cause large
errors. To eliminate this error, use a single clock source
for all devices and avoid disrupting the output data tim-
ing with SYNC pulses while making high-precision
measurements. Alternately, minimize the delay from
DRDYOUT to SYNC to minimize the error.
Example:
Assume fAIN_ = 60Hz, fS = 16ksps, and eight total
devices in the chain.
Device 1 has the longest tDRDYOUT_TO_SYNC delay,
therefore the worst-case SYNC error.
If device 1 has the fastest XIN clock in the chain, and
device 2 has the slowest XIN clock in the chain, and
they differ by 0.1%, device 1 completes its conversion
as much as 0.1% earlier than device 2. Hence, the
delay of device 2 is:
0.1% x (1/16kHz ) = 62.5ns
The signal then propagates down the chain at a time
delay of nominally 20ns for each device.
The total delay back to the SYNC falling edge after
going through six additional delays is:
tDELAY = 62.5ns + 6 x 20ns = 182.5ns
Maximum % Error = 2
π x fIN x tDRDYOUT_TO_SYNC x
100% = 2 x π x 60Hz x 182.5ns x 100% = 0.007%
The above error is relative to the signal level, not to the
full scale of the data converter.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX11040KGUU/GG8 | 制造商:Maxim Integrated Products 功能描述:24-BIT, 4-CHANNEL, SIMULTANEOUS-SAMPLING, CASCADABLE, SIGMA- - Rail/Tube |
| MAX11040KGUU/GH9 | 制造商:Maxim Integrated Products 功能描述:24-BIT, 4-CHANNEL, SIMULTANEOUS-SAMPLING, CASCADABLE, SIGMA- - Rail/Tube |
| MAX11040KGUU+ | 功能描述:模数转换器 - ADC 24Bit 4Ch Simul-Samp Cascadable Sig Delt 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 |
| MAX11040KGUU+T | 功能描述:模数转换器 - ADC 24Bit 4Ch Simul-Samp Cascadable Sig Delt 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 |
| MAX11041 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Wired Remote Controllers |
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