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參數(shù)資料
| 型號： | MX7534JP+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 14BIT MPU COMP 20-PLCC |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 設(shè)置時間： | 800ns |
| 位數(shù)： | 14 |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 電壓電源： | 單電源 |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-LCC（J 形引線） |
| 供應(yīng)商設(shè)備封裝： | 20-PLCC（9x9） |
| 包裝： | 帶卷 (TR) |
| 輸出數(shù)目和類型： | 1 電流，單極；1 電流，雙極 |
| 采樣率（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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| MX7534KCWP | 功能描述:數(shù)模轉(zhuǎn)換器- DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MX7534KCWP+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit Precision DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MX7534KCWP+T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit Precision DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MX7534KCWP-T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MX7534KEWP | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Microprocessor-Compatible, 14-Bit DACs |
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