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参数资料
| 型号： | MAX5525ETC+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/23页 |
| 文件大小： | 0K |
| 描述： | IC DAC 10BIT DUAL ULP 12-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 设置时间： | 660µs |
| 位数： | 10 |
| 数据接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 2 |
| 电压电源： | 单电源 |
| 功率耗散（最大）： | 1.35W |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WQFN 裸露焊盘 |
| 供应商设备封装： | 12-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
| 输出数目和类型： | 2 电压，单极；2 电压，双极 |
| 采样率（每秒）： | * |
MAX5522–MAX5525
Voltage Biasing a
Current-Output Transducer
See the circuit in Figure 5 for an illustration of how to
configure the MAX5524/MAX5525 to bias a current-out-
put transducer. In Figure 5, the output voltage of the
MAX5524/MAX5525 is a function of the voltage drop
across the transducer added to the voltage drop
across the feedback resistor R.
Unipolar Output
Figure 6 shows the MAX5524 in a unipolar output con-
figuration with unity gain. Table 4 lists the unipolar out-
put codes.
Bipolar Output
The MAX5524 output can be configured for bipolar
operation as shown in Figure 7. The output voltage is
given by the following equation:
VOUT_ = VREFIN x [(NA - 512) / 512]
where NA represents the decimal value of the DAC’s
binary input code. Table 5 shows the digital codes (off-
set binary) and the corresponding output voltage for
the circuit in Figure 7.
Configurable Output Gain
The MAX5524/MAX5525 have force-sense outputs,
which provide a connection directly to the inverting ter-
minal of the output op amp, yielding the most flexibility.
The advantage of the force-sense output is that specific
gains can be set externally for a given application. The
gain error for the MAX5524/MAX5525 is specified in a
unity-gain configuration (op-amp output and inverting ter-
minals connected), and additional gain error results from
external resistor tolerances. Another advantage of the
force-sense DAC is that it allows many useful circuits to
be created with only a few simple external components.
An example of a custom fixed gain using the MAX5524/
MAX5525 force-sense output is shown in Figure 8. In
this example, R1 and R2 set the gain for VOUTA.
VOUTA = [(VREFIN x NA) / 1024] x [1 + (R2 / R1)]
where NA represents the numeric value of the DAC
input code.
Self-Biased Two-Electrode
Potentiostat Application
See the circuit in Figure 10 for an illustration of how to
use the MAX5525 to bias a two-electrode potentiostat
on the input of an ADC.
Power Supply and
Bypassing Considerations
Bypass the power supply with a 4.7F capacitor in parallel
with a 0.1F capacitor to GND. Minimize lengths to reduce
lead inductance. If noise becomes an issue, use shielding
and/or ferrite beads to increase isolation. For the thin QFN
package, connect the exposed pad to ground.
Dual, Ultra-Low-Power,
10-Bit, Voltage-Output DACs
18
______________________________________________________________________________________
Table 4. Unipolar Code Table (Gain = +1)
DAC CONTENTS
MSB
LSB
ANALOG OUTPUT
1111
1100
+VREF (1023/1024)
1000
0000
0100
+VREF (513/1024)
1000
0000
+VREF (512/1024) = +VREF/2
0111
1111
1100
+VREF (511/1024)
0000
0100
+VREF (1/1024)
0000
0V
Table 5. Bipolar Code Table (Gain = +1)
DAC CONTENTS
MSB
LSB
ANALOG OUTPUT
1111
1100
+VREF (511/512)
1000
0000
0100
+VREF (1/512)
1000
0000
0V
0111
1111
1100
-VREF (1/512)
0000
0100
-VREF (511/512)
0000
-VREF (512/512) = -VREF
NA IS THE DAC INPUT CODE
(0 TO 1023 DECIMAL).
REFIN
MAX5524
OUT_
FB_
VOUT =
VREFIN
× NA
1024
DAC
Figure 6. Unipolar Output Circuit
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5527EVKIT | 功能描述:数字电位计 IC Evaluation Kit for the MAX5527 RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MAX5527GTA | 制造商:Maxim Integrated Products 功能描述:ONE-TIME PROGRAMMABLE LINEAR-TAPER - Rail/Tube |
| MAX5527GTA+ | 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 64POS 100KOHM SGL 8TDFN EP - Rail/Tube |
| MAX5527GTA+T | 功能描述:数字电位计 IC 64-Tap One-Time Programmable RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MAX5527GTA-T | 功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
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