參數(shù)資料
型號(hào)： MAX1325ECM
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： ADC
英文描述： 8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs with 10V, 5V, and 0 to +5V Analog Input Ranges
中文描述： 4-CH 14-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP48
封裝： 7 X 7 MM, 1.40 MM HEIGHT, MS-026BBC, TQFP-48
文件頁(yè)數(shù)： 19/27頁(yè)
文件大?。?/td> 255K
代理商： MAX1325ECM
M
8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs
with ±10V, ±5V, and 0 to +5V Analog Input Ranges
______________________________________________________________________________________
19
Reading After Conversion
Figure 7 shows the interface signals for a read operation
after a conversion with all eight channels enabled. At the
falling edge of
EOLC
, on the 38th clock pulse after the ini-
tiation of a conversion, driving
CS
and
RD
low places the
first conversion result onto the parallel bus, which can be
latched on the rising edge of
RD
. Successive low pulses
of
RD
place the successive conversion results onto the
bus. Pulse CONVST low to initiate a new conversion.
Power-Up Reset
At power-up, all channels are selected for conversion
(see the
Configuration Register
section). After applying
power, allow a 1.0ms wake-up time to elapse before ini-
tiating the first conversion. Then, hold CONVST high for
at least 2.0μs after the wake-up time is complete. If
using an external clock, apply 20 clock pulses to CLK
with CONVST high before initiating the first conversion.
Referenc e
Internal Reference
The internal-reference circuits provide for analog input
voltages of 0 to +5V unipolar (MAX1316/MAX1317/
MAX1318), ±5V bipolar (MAX1320/MAX1321/MAX1322),
or ±10V bipolar (MAX1324/MAX1325/MAX1326). Install
external capacitors for reference stability, as indicated in
Table 4, and as shown in the
Typical Operating Circuits
.
External Reference
Connect a +2.0V to +3.0V external reference at REF
MS
and/or REF. When connecting an external reference, the
input impedance is typically 5k
. The external reference
must be able to drive 200μA of current and have a low
output impedance. For more information about using
external references see the
Transfer Functions
section.
Layout, Grounding, and Bypassing
For best performance use PC boards with ground
planes. Board layout should ensure that digital and
analog signal lines are separated from each other. Do
not run analog and digital lines parallel to one another
(especially clock lines), or do not run digital lines
underneath the ADC package. Figure 8 shows the rec-
ommended system ground connections when not using
a ground plane. A single-point analog ground (star
ground point) should be established at AGND, sepa-
rate from the logic ground. All other analog grounds
and DGND should be connected to this ground.
Figure 8. Power-Supply Grounding and Bypassing
Table 4. Reference Bypass Capacitors
INPUT VOLTAGE RANGE
LOCATION
UNIPOLAR (μF)
2.2 ||0.1
0.01
0.01
0.1
2.2 ||0.1
0.1
2.2 ||0.1
BIPOLAR (μF)
NA
0.01 (connect REF
MS
to REF)
0.01 (connect REF
MS
to REF)
0.1
2.2 ||0.1
0.1
2.2 ||0.1
MSV bypass capacitor to AGND
REF
MS
bypass capacitor to AGND
REF bypass capacitor to AGND
REF+ bypass capacitor to AGND
REF+ to REF- capacitor
REF- bypass capacitor to AGND
COM bypass capacitor to AGND
NA = Not applicable (connect MSV directly to AGND).
SUPPLIES
AV
DD
AGND
DGND
V
DD
DIGITAL
CIRCUITRY
OPTIONAL
FERRITE
BEAD
+5V
RETURN
RETURN
+3V TO+5V
DV
DD
GND
MAX1316–MAX1318
MAX1320–MAX1322
MAX1324–MAX1326
相關(guān)PDF資料
PDF描述
MAX1317ECM 18-Bit Buffers/Drivers With 3-State Outputs 56-SSOP -40 to 85
MAX1320ECM Dual 8-Bit To 9-Bit Parity Bus Transceivers 56-SSOP -40 to 85
MAX132CNG 【18-Bit ADC with Serial Interface
MAX132EWG 【18-Bit ADC with Serial Interface
MAX132MRG 【18-Bit ADC with Serial Interface
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1325ECM+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14-Bit 4Ch 526ksps 3V 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
MAX1325ECM+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14-Bit 4Ch 526ksps 3V 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
MAX1325ECM-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
MAX1326ECM 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
MAX1326ECM+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14-Bit 2Ch 526ksps 3V 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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*