参数资料
型号: MAX1368ECM+T
厂商: Maxim Integrated
文件页数: 16/36页
文件大小: 0K
描述: IC PANEL METER 3.5 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
接口: 串行
数字或字符: A/D,3.5 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)
Microcontroller-Interface, 4.5-/3.5-Digit Panel
Meters with 4–20mA Output
CS OR CS_DAC
t CSH
t CSS
t CL
t CH
t CSH
SCLK
t DS
t DH
DIN
t DV
DOUT
Figure 6. ADC and DAC Timing Diagram
CS
SCLK
t DO
t TR
DIN
1
0
RS4 RS3 RS2 RS1 RS0
x
D15 D14 D13 D12 D11 D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
CONTROL BYTE
DOUT
Figure 7. Serial-Interface, 16-Bit, Write Timing Diagram
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
DATA BYTE
Table 4. LED During Overrange and
Underrange Conditions
Figures 20–23 for the transfer functions of the DAC and
V/I converter.
Note: The MAX1366/MAX1368 expect a 6k ? (typ)
source impedance from the voltage source driving
CONDITION
Overrange
Underrange
MAX1368
1---
-1---
MAX1366
1----
-1----
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 unipo-
lar 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 21 and 22.
Bipolar Mode
Set EN_BPM high to engage bipolar operation. In bipo-
lar mode, the current output at 4-20OUT (4–20mA or 0
to 16mA) maps the analog input voltage (±2V or
±200mV). In bipolar mode, a 0V analog input maps to
midscale (12mA). See Table 5 for current output. Also
see Figures 21 and 22 .
16
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