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參數(shù)資料
| 型號： | MAX5525ETC+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 10/23頁 |
| 文件大小： | 0K |
| 描述： | IC DAC 10BIT DUAL ULP 12-TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 75 |
| 設(shè)置時(shí)間： | 660µs |
| 位數(shù)： | 10 |
| 數(shù)據(jù)接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 2 |
| 電壓電源： | 單電源 |
| 功率耗散（最大）： | 1.35W |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 12-WQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 12-TQFN-EP（4x4） |
| 包裝： | 管件 |
| 輸出數(shù)目和類型： | 2 電壓，單極；2 電壓，雙極 |
| 采樣率（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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| MAX5525ETC+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 10-Bit 2Ch 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(shí)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 |
| MAX5525ETC+T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 10-Bit 2Ch 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(shí)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 |
| MAX5525ETC-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(shí)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 |
| MAX5527EVKIT | 功能描述:數(shù)字電位計(jì) IC Evaluation Kit for the MAX5527 RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MAX5527GTA | 制造商:Maxim Integrated Products 功能描述:ONE-TIME PROGRAMMABLE LINEAR-TAPER - Rail/Tube |
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