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参数资料
| 型号： | MX7705EPE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 19/33页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 2CH 16-DIP |
| 产品培训模块： | MAX11200 ADC Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 25 |
| 位数： | 16 |
| 采样率（每秒）： | 500 |
| 数据接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 16-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 16-PDIP |
| 包装： | 管件 |
| 输入数目和类型： | 2 个差分，单极 |
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MX7705
Reset
Drive RESET low to reset the MX7705 to power-on reset
status. DRDY goes high and all communication to the
MX7705 is ignored while RESET is low. Upon releasing
RESET, the device must be reconfigured to begin a con-
version. The device returns to waiting for a write to the
communication register after a reset has been performed.
Perform a calibration sequence following a reset for
accurate conversions.
The MX7705 clock generator continues to run when
RESET is pulled low. This allows any device running from
CLKOUT to be uninterrupted when the device is in reset.
Selecting Custom Output Data Rates and
First-Notch Frequency
The recommended frequency range of the external clock
is 400kHz to 5MHz. The output data rate and first notch
frequency are dependent on the decimation rate of the
digital filter. Table 14 shows the available decimation
rates of the digital filter. The output data rate and filter first
notch is calculated using the following formula:
(if CLKDIV = 1)
(if CLKDIV = 0)
Note: First-notch filter frequency = output data rate.
Performing a Conversion
At power-on reset, the MX7705 expects a write to the
communications register. Writing to the communica-
tions register selects the acquisition channel, read/write
operation for the next register, power-down/normal
mode, and address of the following register to be
accessed. The MX7705 has six user-accessible regis-
ters, which control the function of the device and allow
the result to be read. Write to the communications reg-
ister before accessing any other registers.
Writing to the clock and setup registers after configuring
and initializing the host processor serial port sets up the
MX7705. Use self- or system calibrations to minimize off-
set and gain errors (see the
Calibration section for more
details). Set FSYNC = 0 to begin calibration or conver-
sion. The MX7705 performs free-running acquisitions
when FSYNC is low (see the
Using FSYNC section). The
C can poll the DRDY bit of the communications register
and read the data register when the DRDY bit returns a
0. For hardware polling, the DRDY output goes low when
the new data is valid in the data register.
The data register can be read multiple times while the
next conversion takes place.
The flow diagram in Figure 11 shows an example
sequence required to perform a conversion on channel
1 (AIN1+ / AIN1-) after a power-on reset.
output data rate
f
Decimation Rate
CLKIN
=
×
128
output data rate
f
Decimation Rate
CLKIN
.
=
×
128
05
16-Bit, Low-Power, 2-Channel,
Sigma-Delta ADC
26
______________________________________________________________________________________
Table 14. Filter Select and Decimation Rate
CLK
FS1
FS0
DECIMATION RATE
0
391
0
1
313
01
0
78
01
1
39
1
0
384
1
0
1
320
11
0
77
11
1
38
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MX7705EPE+ | 功能描述:模数转换器 - ADC 16-Bit 2Ch 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 |
| MX7705EUE | 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 |
| MX7705EUE+ | 功能描述:模数转换器 - ADC 16-Bit 2Ch 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 |
| MX7705EUE+T | 功能描述:模数转换器 - ADC 16-Bit 2Ch 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 |
| MX7705EUE-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 |
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