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參數(shù)資料
| 型號： | MX7576JEQP |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | ADC |
| 英文描述： | SM Series Subminiature Basic Switch, Single Pole Double Throw (SPDT), 250 Vac, 5 A, Straight Lever Actuator, Solder Termination |
| 中文描述： | 1-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PQCC20 |
| 封裝： | PLASTIC, LCC-20 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 105K |
| 代理商： | MX7576JEQP |
The decoupling capacitors are necessary to provide a
low AC source impedance.
Internal/External Cloc k
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, C
CLK
, and an external resistor, R
CLK
, which
are connected as shown in Figure 16a. During a con-
version, a sawtooth waveform is generated on the CLK
pin by charging C
CLK
through R
CLK
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 V
DD
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
R
CLK
and C
CLK
combination. Due to process varia-
tions, the oscillation frequency for this R
CLK
/C
CLK
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 (5μs MX7575/10μs 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.
M
CMOS , μP-Compatible, 5μs/10μs, 8-Bit ADCs
_______________________________________________________________________________________
9
54
52
50
46
44
42
100
1k
100k
48
40
M
INPUT FREQUENCY (Hz)
S
10k
T
A
= +25°C
0
0.5
1.0
2.0
2.5
10
100
10000
1.5
M
CONVERSION TIME (
μ
s)
R
1000
A
B
C
A: T
A
= +125°C
B: T
A
= +85°C
C: T
A
= +25°C
1.23V
0.1
μ
F
47
μ
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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MX7576JEWN | SM Series Subminiature Basic Switch, Single Pole Double Throw (SPDT), 250 Vac, 5 A, Straight Lever Actuator, PCB Solder Termination |
| MX7576JN | CMOS, uP-Compatible, 5レs/10レs, 8-Bit ADCs |
| MX7576JP | CMOS, uP-Compatible, 5レs/10レs, 8-Bit ADCs |
| MX7575KEQP | CMOS, uP-Compatible, 5レs/10レs, 8-Bit ADCs |
| MX7576KEQP | CMOS, uP-Compatible, 5レs/10レs, 8-Bit ADCs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MX7576JEWN | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:CMOS, uP-Compatible, 5レs/10レs, 8-Bit ADCs |
| MX7576JN | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MX7576JN+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8-Bit Precision DAC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MX7576JP | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MX7576JP+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8-Bit Precision DAC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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