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参数资料
| 型号： | MAX115CAX+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/14页 |
| 文件大小： | 0K |
| 描述： | IC DAS SYSTEM 12BIT 36-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1,000 |
| 类型： | 数据采集系统（DAS） |
| 分辨率（位）： | 12 b |
| 数据接口： | 并联 |
| 电压电源： | 模拟和数字 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-BSOP（0.295"，7.50mm 宽） |
| 供应商设备封装： | 36-SSOP |
| 包装： | 带卷 (TR) |
MAX115/MAX116
For multichannel conversions, INT goes low after the last
channel has been digitized.
To input data into the MAX115/MAX116, pull CS low,
program the bidirectional pins A0–A3 (Table 1), and
pulse WR low. Data is latched into the devices on the
WR or CS rising edge. The ADC is now ready to convert.
Once programmed, the ADC continues operating in the
same mode until reprogrammed or until power is
removed. Figure 5 shows an example of programming a
four-channel conversion using Input Mux A.
Starting a Conversion
After programming the MAX115/MAX116 as outlined in
the Programming Modes section, pulse CONVST low to
initiate a conversion sequence. The analog inputs are
sampled at the CONVST rising edge. Do not start a
new conversion while the conversion is in progress.
Monitor the INT output. A falling edge indicates the end
of a conversion sequence.
Reading a Conversion
Digitized data from up to four channels is 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 results from CH1_ are
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. For multi-
channel conversions, up to four RD falling edges
sequentially access the data for channels 1 through 4.
For any number of channels converted, the address
pointer is reset to CH1_ after four RD pulses. The
address pointer also resets after receiving a CNVST
pulse. Do not perform a read operation during conver-
sion; it will corrupt the conversion’s accuracy.
__________Applications Information
Clock
The MAX115/MAX116 have an internal 10MHz (typ)
clock, which is activated by connecting CLK to DVDD
(internal clock startup time is 165s typ). The CLK input
also accepts an external clock with duty cycle between
30% and 70%.
2x4-Channel, Simultaneous-Sampling
12-Bit ADCs
10
______________________________________________________________________________________
X = Don’t care
Table 1. Modes of Operation
TO DAC
REFIN
10k
0.1
F
4.7
F
AV = 1
2.5V
REFOUT
7
6
(2.5V)
MAX115
MAX116
Figure 6. Internal Reference
Input Mux A/Single-Channel Conversion (default at power-up)
Power-Down
—
X
1
Input Mux B/Four-Channel Conversion
8
1
0
Input Mux B/Three-Channel Conversion
6
0
1
0
Input Mux B/Two-Channel Conversion
4
1
0
1
0
Input Mux B/Single-Channel Conversion
2
0
1
0
Input Mux A/Four-Channel Conversion
Input Mux A/Three-Channel Conversion
Input Mux A/Two-Channel Conversion
MODE
8
6
4
2
CONVERSION
TIME (s)
1
0
1
0
A0
1
0
1
0
A1
A2
A3
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