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參數(shù)資料
| 型號(hào)： | MAX197BENI |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | Multi-Range (【10V, 【5V, +10V, +5V), Single +5V, 12-Bit DAS with 8+4 Bus Interface |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDIP28 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-28 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大?。?/td> | 165K |
| 代理商： | MAX197BENI |
M
How to S tart a Conversion
Conversions are initiated with a write operation, which
selects the mux channel and configures the MAX197 for
either unipolar or bipolar input range. A write pulse (WR
+ CS) can either start an acquisition interval or initiate a
combined acquisition plus conversion. The sampling
interval occurs at the end of the acquisition interval.
The ACQMOD bit in the input control byte offers two
options for acquiring the signal: internal or external.
The conversion period lasts for 12 clock cycles in either
internal or external clock or acquisition mode.
Writing a new control byte during conversion cycle will
abort conversion and start a new acquisition interval.
Internal Acquisition
Select internal acquisition by writing the control byte
with the ACQMOD bit cleared (ACQMOD = 0). This
causes the write pulse to initiate an acquisition interval
whose duration is internally timed. Conversion starts
when this six-clock-cycle acquisition interval (3μs with
f
CLK
= 2MHz) ends. See Figure 5.
External Acquisition
Use the external acquisition timing mode for precise con-
trol of the sampling aperture and/or independent control
of acquisition and conversion times. The user controls
acquisition and start-of-conversion with two separate
write pulses. The first pulse, written with ACQMOD = 1,
starts an acquisition interval of indeterminate length. The
second write pulse, written with ACQMOD = 0, termi-
nates acquisition and starts conversion on WR’s rising
edge (Figure 6). However, if the second control byte
contains ACQMOD = 1, an indefinite acquisition interval
is restarted.
The address bits for the input mux must have the same
values on the first and second write pulses. Power-
down mode bits (PD0, PD1) can assume new values on
the second write pulse (see Power-Down Mode).
Multi-Range (±10V, ±5V, +10V, +5V ),
S ingle +5V, 12-Bit DAS with 8+4 Bus Interfac e
10
______________________________________________________________________________________
t
CS
t
CSWS
t
WR
t
ACQI
t
CONV
t
DH
t
DS
t
INT1
t
D0
t
D01
t
TR
HGH-Z
HGH-Z
t
CSRS
t
CSRH
CS
WR
D7–D0
INT
RD
HBEN
DOUT
ACQMOD ="0"
HIGH / LOW
HIGH / LOW
CBYTE
t
CSWH
Figure 5. Conversion Timing Using Internal Acquisition Mode
Table 6. Data-Bus Output
PIN
D0
D1
D2
D3
D4
D5
D6
D7
HBEN = LOW
B0 (LSB)
B1
B2
B3
B4
B5
B6
B7
HBEN = HIGH
B8
B9
B10
B11 (MSB)
B11 (BIP = 1) / 0 (BIP = 0)
B11 (BIP = 1) / 0 (BIP = 0)
B11 (BIP = 1) / 0 (BIP = 0)
B11 (BIP = 1) / 0 (BIP = 0)
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| MAX197BEWI | Multi-Range (【10V, 【5V, +10V, +5V), Single +5V, 12-Bit DAS with 8+4 Bus Interface |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX197BENI+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 100ksps 4.18V 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 |
| MAX197BEWI | 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 |
| MAX197BEWI+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 100ksps 4.18V 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 |
| MAX197BEWI+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 100ksps 4.18V 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 |
| MAX197BEWI-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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