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參數(shù)資料
| 型號： | MAX192ACPP |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | ADC |
| 英文描述： | Fixed-Point Digital Signal Processor 288-FCBGA |
| 中文描述： | 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁數(shù)： | 16/24頁 |
| 文件大?。?/td> | 201K |
| 代理商： | MAX192ACPP |
M
Low-Power, 8-Channel,
S erial 10-Bit ADC
16
______________________________________________________________________________________
Reference
Buffer
Reference-
Buffer
Compensation
Mode
VREF
Capacitor
(μF)
Power-
Down
Mode
Power-Up
Delay
(sec)
Maximum
Sampling
Rate (ksps)
Enabled
Internal
Fast
5μ
26
Enabled
Internal
Full
300μ
26
Enabled
External
4.7
Fast
See Figure 14c
133
Enabled
External
4.7
Full
See Figure 14c
133
Disabled
Fast
2μ
133
Disabled
Full
2μ
133
Table 5. Worst-Case Power-Up Delay Times
PD1
PD0
Device Mode
1
1
External Clock Mode
1
0
Internal Clock Mode
0
1
Fast Power-Down Mode
0
0
Full Power-Down Mode
SHDN
State
Device
Mode
Reference-Buffer
Compensation
1
Enabled
Internal Compensation
Floating
Enabled
External Compensation
0
Full Power-Down
N/A
tors that will not discharge more than 1/2LSB while shut
down. In shutdown, the capacitor has to supply the cur-
rent into the reference (1.5μA typ) and the transient cur-
rents at power-up.
Figures 12a and 12b illustrate the various power-down
sequences in both external and internal clock modes.
Software Power-Down
Software power-down is activated using bits PD1 and
PD0 of the control byte. As shown in Table 6, PD1 and
PD0 also specify the clock mode. When software shut-
down is asserted, the ADC will continue to operate in
the last specified clock mode until the conversion is
complete. Then the ADC powers down into a low quies-
cent-current state. In internal clock mode, the interface
remains active and conversion results may be clocked
out while the MAX192 has already entered a software
power-down.
The first logical 1 on DIN will be interpreted as a start
bit, and powers up the MAX192. Following the start bit,
the data input word or control byte also determines
clock and power-down modes. For example, if the DIN
word contains PD1 = 1, then the chip will remain pow-
ered up. If PD1 = 0, a power-down will resume after
one conversion.
Hardware Power-Down
The
SHDN
pin places the converter into the full
power-down mode. Unlike with the software shutdown
modes, conversion is not completed. It stops coinci-
dentally with
SHDN
being brought low. There is no
power-up delay if an external reference is used and is
not shut down. The
SHDN
pin also selects internal or
external reference compensation (see Table 7).
Power-Down S equenc ing
The MAX192 auto power-down modes can save con-
siderable power when operating at less than maximum
sample rates. The following discussion illustrates the
various power-down sequences.
Lowest Power at up to 500
Conversions/Channel/Second
The following examples illustrate two different
power-down sequences. Other combinations of clock
rates, compensation modes, and power-down modes
may give lowest power consumption in other applica-
tions.
Figure 14a depicts the MAX192 power consumption for
one or eight channel conversions utilizing full
power-down mode and internal reference compensa-
tion. A 0.01μF bypass capacitor at REFADJ forms an
Table 7. Hard-Wired Shutdown and
Compensation Mode
Table 6. Software Shutdown and Clock
Mode
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相關(guān)代理商/技術(shù)參數(shù) |
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| MAX192ACPP+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 8Ch 133ksps 5V Precision 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 |
| MAX192ACWP | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Integrated Circuits (ICs) 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 |
| MAX192ACWP+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 8Ch 133ksps 5V Precision 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 |
| MAX192ACWP+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 8Ch 133ksps 5V Precision 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 |
| MAX192ACWP-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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