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参数资料
| 型号： | MX7534KN+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | IC DAC 14BIT MPU COMP 20-DIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 18 |
| 设置时间： | 800ns |
| 位数： | 14 |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 电压电源： | 单电源 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 20-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 20-PDIP |
| 包装： | 管件 |
| 输出数目和类型： | 1 电流，单极；1 电流，双极 |
| 采样率（每秒）： | * |
MX7534/MX7535
_______________Detailed Description
Digital-to-Analog Section
The basic MX7534/MX7535 digital-to-analog converter
(DAC) circuit consists of a laser-trimmed, thin-film,
11-bit R-2R resistor array, a 3-bit segmented resistor
array, and NMOS current switches, as shown in Figure
2. The three MSBs are decoded to drive switches A–G
of the segmented array, and the remaining bits drive
switches S0–S10 of the R-2R array.
Binary weighted currents are switched to either AGNDF
or IOUT, depending on the status of each input bit. The
R-2R ladder current is one-eighth of the total reference
input current. The remaining seven-eighths of the cur-
rent flows in the segmented resistors, dividing equally
among these seven resistors. The input resistance at
REF is constant; therefore, it can be driven by a voltage
or current source of positive or negative polarity.
The MX7534/MX7535 are optimized for unipolar output
operation (analog output from 0V to -VREF), although
bipolar operation (analog output from +VREF to -VREF) is
possible with some added external components.
Figure 3 shows the equivalent circuit for the two DACs.
COUT varies from about 90pF to 180pF, depending on
the digital code. R0 denotes the DAC’S equivalent out-
put resistance, which varies with the input code.
g(VREF,N) is the Thevenin equivalent voltage generator
due to the reference input voltage, VREF, and the trans-
fer function of the R-2R ladder, N.
Digital Section
All digital inputs are both TTL and 5V CMOS logic compat-
ible. The digital inputs are protected from electrostatic dis-
charge (ESD) with typical input currents of less than 1nA.
To minimize power-supply currents, keep digital input volt-
ages as close to 0V and 5V logic levels as possible.
__________Applications Information
Unipolar Operation (2-Quadrant
Multiplication)
Figures 4a and 4b show the circuit diagram for unipolar
binary operation. With an AC input, the circuit performs
2-quadrant multiplication. The code table for Figure 4 is
given in Table 2.
Capacitor C1 provides phase compensation and helps
prevent overshoot and ringing when high-speed op
amps are used. Note that the output polarity is the
inverse of the reference input.
Microprocessor-Compatible,
14-Bit DACs
6
_______________________________________________________________________________________
VIH + VIL
2
NOTES:
1) ALL INPUT-SIGNAL RISE AND FALL TIMES ARE MEASURED FROM 10% TO 90%
OF +5V. tR = tF = 20ns.
2) TIMING MEASUREMENT REFERENCE LEVEL IS
t5
t6
t7
t1
t2
t3
t4
CS
5V
A0,A1
DATA
0V
5V
0V
5V
0V
5V
0V
WR
t3
t6
t5
t6
t5
t4
t2
t1
t2
t4
5V
0V
5V
0V
5V
0V
5V
0V
NOTES:
1) ALL INPUT-SIGNAL RISE AND FALL TIMES ARE MEASURED FROM 10% TO 90%
OF +5V. tR = tF = 20ns.
2) TIMING MEASUREMENT REFERENCE LEVEL IS
3) IF LDAC IS ACTIVATED PRIOR TO THE RISING EDGE OF WR, THEN IT MUST
STAY LOW FOR t3 OR LONGER AFTER WR GOES HIGH.
VIH + VIL
2
CSLSB
CSMSB
LDAC
WR
DATA
Figure 1a. MX7534 Timing Diagram
Figure 1b. MX7535 Timing Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MX7534KN+ | 功能描述:数模转换器- DAC 14-Bit 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 |
| MX7534KP | 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 |
| MX7534KP+ | 功能描述:数模转换器- DAC 14-Bit 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 |
| MX7534KP+T | 功能描述:数模转换器- DAC 14-Bit 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 |
| MX7534KP-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 |
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