参数资料
型号: MAX1365ECM+T
厂商: Maxim Integrated
文件页数: 14/25页
文件大小: 0K
描述: IC PANEL METER 4.5 DIG 48LQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,000
显示器类型: LED
配置: 7 段显示
数字或字符: A/D,4.5 位数字
电源电压: 2.7 V ~ 5.25 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 48-LQFP
供应商设备封装: 48-LQFP(7x7)
包装: 带卷 (TR)
Stand-Alone, 4.5-/3.5-Digit Panel Meters
with 4–20mA Output
SEGDP
SEGG
SEGF
SEGE
SEGD
SEGC
SEGB
SEGA
A
B
C
D
E
F
G
DP
A
B
C
D
E
F
G
DP
DIGIT 1
A
DIGIT 2
A
F
E
G
B
C
F
E
G
B
C
Figure 4. 2-Digit Common-Cathode Configuration
T ON
DIGIT 4 (MSD)
DIGIT 3
DIGIT 2
DIGIT 1
DIGIT 0 (LSD)
DP
D
INTERDIGIT BLANKING TIME
T
D
DP
DATA
4
3
2
1
0
4
3
2
1
0
4
Figure 5. LED Voltage Waveform
MSD
LSD
Current Output
The MAX1365/MAX1367 feature a 4–20mA (0 to 16mA)
current output for driving remote panel meters, data log-
gers, and process controllers in industrial applications.
The DAC output is proportional to the input of the ADC
and LED display. In the simplest configuration, connect
DAC_VOUT directly to CONV_IN to have the current out-
put (4–20mA or 0 to 16mA) follow the analog inputs.
Custom signal conditioning can be inserted between
DAC_VOUT and CONV_IN, or CONV_IN can be driven
independently by a voltage source if desired. See
Figures 11–14 for the transfer functions of the DAC and
V/I converter.
Note: The MAX1365/MAX1367 expect a 6k ? (typ)
source impedance from the external voltage source
driving CONV_IN.
Current Offset
Set EN_I high for a current span of 4–20mA. Set EN_I low
for a current span of 0 to 16mA. See Table 5 for current
output.
Unipolar Mode
Set EN_BPM low to engage unipolar operation. In
unipolar mode, the current output at 4-20OUT (4–20mA
or 0 to 16mA) maps the analog input voltage (0 to 2V or
0 to 200mV). Negative voltages at the analog input
result in a 4mA or 0mA output, depending on the EN_I
setting. See Table 5 for current output. See Figures 12
and 13.
14
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