參數(shù)資料
型號(hào)： MAX125EVB16
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 2/15頁(yè)
文件大小： 0K
描述： EVAL KIT FOR MAX125
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1
ADC 的數(shù)量： 4
位數(shù)： 14
采樣率（每秒）： 250k
數(shù)據(jù)接口： 并聯(lián)
輸入范圍： ±5 V
在以下條件下的電源（標(biāo)準(zhǔn)）： 165mW @ 250kSPS
工作溫度： 0°C ~ 70°C
已用 IC / 零件： MAX125
已供物品： 2 板，CD
MAX125/MAX126
Reading a Conversion
Digitized data from up to four channels are stored in
memory to be read out through the parallel interface.
After receiving an INT signal, the user can access up to
four conversion results by performing up to four read
operations.
With CS low, the conversion result from CH_1 is
accessed, and INT is reset high on the first RD falling
edge. On the RD rising edge, the internal address
pointer is advanced. If a single conversion is pro-
grammed, only one RD pulse is required, and the
address pointer is reset to CH_1. For multichannel con-
versions, up to four RD falling edges sequentially
access the data for channels 1 through 4. For
n chan-
nels converted (1 <
n
≤ 4), the address pointer is reset
to CH_1 after
n RD pulses. Do not perform a read oper-
ation during conversion, as it will corrupt the conver-
sion’s accuracy.
__________Applications Information
External Clock
The MAX125/MAX126 require a TTL-compatible clock
up to 16MHz for proper operation. The clock duty
cycle’s range is between 30% and 70%.
Internal and External Reference
The MAX125/MAX126 can be used with an internal or
external reference voltage. An external reference can
be connected directly at REFIN. An internal buffer with
a gain of +1 provides 2.5V at REFOUT.
Internal Reference
The full-scale range with the internal reference is ±5V
for the MAX125 and ±2.5V for the MAX126. Bypass
REFIN with a 0.1F capacitor to AGND and bypass the
REFOUT pin with a 4.7F (min) capacitor to AGND
(Figure 6). The maximum value to compensate the ref-
erence buffer is 22F. Larger values are acceptable if
low-ESR capacitors are used.
External Reference
For operation over a wide temperature range, an exter-
nal 2.5V reference with tighter specifications improves
accuracy. The MAX6325 is an excellent choice
to match the MAX125/MAX126 accuracy over the
commercial and extended temperature ranges with a
2x4-Channel, Simultaneous-Sampling
14-Bit DAS
10
______________________________________________________________________________________
X = Don’t care
Table 1. Modes of Operation
A3
A2
A1
0
1
0
1
A0
0
1
0
1
CONVERSION
TIME (s)
3
6
9
12
MODE
Input Mux A/Two-Channel Conversion
Input Mux A/Three-Channel Conversion
Input Mux A/Four-Channel Conversion
0
1
0
3
Input Mux B/Single-Channel Conversion
0
1
0
1
6
Input Mux B/Two-Channel Conversion
0
1
0
9
Input Mux B/Three-Channel Conversion
0
1
12
Input Mux B/Four-Channel Conversion
1
X
—
Power-Down
TO DAC
REFIN
10k
0.1
F
4.7
F
AV = 1
2.5V
REFOUT
7
6
(2.5V)
MAX125
MAX126
Figure 6. Internal Reference
Input Mux A/Single-Channel Conversion (default at power-up)
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參數(shù)描述
MAX125EVKIT 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 MAX125/126 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評(píng)估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
MAX1261ACEI 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
MAX1261ACEI+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 250ksps 3.6V 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
MAX1261ACEI+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 250ksps 3.6V 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
MAX1261ACEI-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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