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参数资料
| 型号： | MX7575KP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/12页 |
| 文件大小： | 0K |
| 描述： | IC ADC 8BIT MPU COMP 20-PLCC |
| 标准包装： | 1,000 |
| 位数： | 8 |
| 采样率（每秒）： | 200k |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 15mW |
| 电压电源： | 单电源 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-LCC（J 形引线） |
| 供应商设备封装： | 20-PLCC（9x9） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个单端，单极 |
The decoupling capacitors are necessary to provide a
low AC source impedance.
Internal/External Clock
The MX7575/MX7576 can be run with either an exter-
nally applied clock or their internal clock. In either case,
the signal appearing at the clock pin is internally divid-
ed by two to provide an internal clock signal that is rela-
tively insensitive to the input clock duty cycle.
Therefore, a single conversion takes 20 input clock
cycles, which corresponds to 10 internal clock cycles.
Internal Clock
The internal oscillator frequency is set by an external
capacitor, CCLK, and an external resistor, RCLK, which
are connected as shown in Figure 16a. During a con-
version, a sawtooth waveform is generated on the CLK
pin by charging CCLK through RCLK and discharging it
through an internal switch. At the end of a conversion,
the internal oscillator is shut down by clamping the CLK
pin to VDD through an internal switch. The circuit for the
internal oscillator can easily be overdriven with an
external clock source.
The internal oscillator provides a convenient clock
source for the MX7575. Figure 17 shows typical conver-
sion times versus temperature for the recommended
RCLK and CCLK combination. Due to process varia-
tions, the oscillation frequency for this RCLK/CCLK com-
bination may vary by as much as ±50% from the
nominal value shown in Figure 17. Therefore, an exter-
nal clock should be used in the following situations:
1) Applications that require the conversion time to be
within 50% of the minimum conversion time for the
specified accuracy (5s MX7575/10s MX7576).
2) Applications in which time-related software con-
straints cannot accommodate conversion-time differ-
ences that may occur from unit to unit or over
temperature for a given device.
External Clock
The CLK input of the MX7575/MX7576 may be driven
directly by a 74HC or 4000B series buffer (e g., 4049),
or by an LS TTL output with a 5.6k
pull-up resistor. At
the end of a conversion, the device ignores the clock
input and disables its internal clock signal. Therefore,
the external clock may continue to run between conver-
sions without being disabled. The duty cycle of the
external clock may vary from 30% to 70%. As dis-
cussed previously, in order to maintain accuracy, clock
rates significantly lower than the data sheet limits
(4MHz for MX7575 and 2MHz for MX7576) should not
be used.
MX7575/MX7576
CMOS, P-Compatible, 5s/10s, 8-Bit ADCs
_______________________________________________________________________________________
9
54
52
50
46
44
42
100
1k
100k
48
40
MX7575/6
FIG13
INPUT FREQUENCY (Hz)
SNR
(dB)
10k
TA = +25°C
0
0.5
1.0
2.0
2.5
10
100
10000
1.5
MX7575/6
FIG14
CONVERSION TIME (
s)
RELATIVE
ACCURACY
(LSB)
1000
A
B
C
A: TA = +125°C
B: TA = +85°C
C: TA = +25°C
1.23V
0.1
F
47
F
+5V
REF
3.3k
+
_
+
ICL8069
Figure 13. MX7575 SNR vs. Input Frequency
Figure 14. MX7575 Accuracy vs. Conversion Time
Figure 15. External Reference Circuit
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MX7575SQ | 功能描述:模数转换器 - ADC 8-Bit Precision DAC 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 |
| MX7575SQ/883B | 功能描述:模数转换器 - ADC 8-Bit Precision DAC 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 |
| MX7575TQ | 功能描述:模数转换器 - ADC 8-Bit Precision DAC 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 |
| MX7575TQ/883B | 功能描述:模数转换器 - ADC 8-Bit Precision DAC 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 |
| MX7576 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:CMOS.µ.P Compatible.5µ.s/10µ.s.8-Bit ADCs |
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