__________Applications Information
Unipolar Output
For a unipolar output, the output voltages and the refer-
ence inputs have the same polarity. Figure 9 shows the
MAX525 unipolar output circuit, which is also the typi-
cal operating circuit. Table 2 lists the unipolar output
codes.
For rail-to-rail outputs, see Figure 10. This circuit shows
the MAX525 with the output amplifiers configured with a
closed-loop gain of +2 to provide 0V to 5V full-scale
range when a 2.5V reference is used.
Bipolar Output
The MAX525 outputs can be configured for bipolar
operation using Figure 11’s circuit.
VOUT = VREF [(2NB / 4096) - 1]
where NB is the numeric value of the DAC’s binary
input code. Table 3 shows digital codes (offset binary)
and corresponding output voltages for Figure 11’s
circuit.
MAX525
Low-Power, Quad, 12-Bit Voltage-Output DAC
with Serial Interface
______________________________________________________________________________________
13
Table 2. Unipolar Code Table
Table 3. Bipolar Code Table
Note: 1LSB = (VREF) (
4096
)
1
DAC CONTENTS
ANALOG OUTPUT
MSB
LSB
4095
1111
+VREF ( ——— )
4096
2049
1000
0000
0001
+VREF ( ——— )
4096
2048
+VREF
1000
0000
+VREF ( ——— ) = ————
4096
2
2047
0111
1111
+VREF ( ——— )
4096
1
0000
0001
+VREF ( ——— )
4096
0000
0V
DAC CONTENTS
ANALOG OUTPUT
MSB
LSB
2047
1111
+VREF ( ——— )
2048
1
1000
0000
0001
+VREF ( ——— )
2048
1000
0000
0V
1
0111
1111
-VREF ( ——— )
2048
2047
0000
0001
-VREF ( ——— )
2048
0000
-VREF ( ——— ) = -VREF
2048
MAX525
DAC A
DAC B
DAC C
DAC D
OUTA
FBA
FBB
FBC
FBD
OUTB
OUTC
OUTD
DGND
AGND
REFAB
REFCD
REFERENCE INPUTS
+5V
VDD
Figure 9. Unipolar Output Circuit
相关PDF资料
MAX526DENG+ IC DAC 12BIT QUAD CALIB 24-DIP
MAX5302EUA+T IC DAC 12BIT LP SERIAL 8-UMAX
MAX5304EUA+T IC DAC 10BIT LP VOLT OUT 8-UMAX
MAX5307EUE+ IC DAC 12BIT OCT LP SER 16-TSSOP
MAX5312EAE+T IC DAC 12BIT 5V/10V SER 16-SSOP
MAX5316GTG+ IC DAC 16BIT SPI 24TQFN
MAX5322EAI+ IC DAC 12BIT DUAL 10V SER 28SSOP
MAX532AEPE+ IC MDAC 12BIT DUAL SER 16-DIP
相关代理商/技术参数
MAX525AEAP+T 功能描述:数模转换器- DAC 12-Bit 4Ch Precision DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MAX525AEAP-T 功能描述:数模转换器- DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MAX525AEPP 功能描述:数模转换器- DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MAX525AEPP+ 功能描述:数模转换器- DAC 12-Bit 4Ch Precision DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MAX525AMJP 功能描述:数模转换器- DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MAX525BC/D 功能描述:数模转换器- DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MAX525BCAP 功能描述:数模转换器- DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MAX525BCAP+ 功能描述:数模转换器- DAC 12-Bit 4Ch Precision DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube