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參數(shù)資料
| 型號： | MX7576KN+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 12/12頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 8BIT MPU COMP 18-DIP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 20 |
| 位數(shù)： | 8 |
| 采樣率（每秒）： | 200k |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 889mW |
| 電壓電源： | 單電源 |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 18-DIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 18-PDIP |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 1 個單端，單極 |
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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MX7576KN+ | 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 |
| MX7576KP | 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 |
| MX7576KP+ | 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 |
| MX7576KP+T | 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 |
| MX7576KP-T | 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 |
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