参数资料
| 型号： | AD5439YRU |
| 厂商： | Analog Devices Inc |
| 文件页数： | 9/29页 |
| 文件大小： | 0K |
| 描述： | IC DAC DUAL 10BIT MULT 16-TSSOP |
| 产品培训模块： | Data Converter Fundamentals DAC Architectures |
| 标准包装： | 96 |
| 设置时间： | 35ns |
| 位数： | 10 |
| 数据接口： | 串行 |
| 转换器数目： | 2 |
| 电压电源： | 单电源 |
| 功率耗散（最大）： | 3.5µW |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 16-TSSOP |
| 包装： | 管件 |
| 输出数目和类型： | 4 电流，单极；4 电流，双极 |
| 采样率（每秒）： | 2.47M |
第1页第2页第3页第4页第5页第6页第7页第8页当前第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页
AD5429/AD5439/AD5449
Data Sheet
Rev. E | Page 16 of 28
Bipolar Operation
In some applications, it may be necessary to generate full
4-quadrant multiplying operation or a bipolar output swing.
This can easily be accomplished by using another external
amplifier and three external resistors, as shown in Figure 39.
When VIN is an ac signal, the circuit performs 4-quadrant
multiplication. When connected in bipolar mode, the output
voltage is
(
)
REF
n
REF
OUT
V
D
V
/
×
=
/ 1
2
/
where:
D is the fractional representation of the digital word loaded to
the DAC.
D = 0 to 255 (AD5429)
= 0 to 1023 (AD5439)
= 0 to 4095 (AD5449)
n is the number of bits.
Table 6 shows the relationship between digital code and the
expected output voltage for bipolar operation with the AD5429.
Table 6. Bipolar Code
Digital Input
Analog Output (V)
1111 1111
+VREF (255/256)
1000 0000
0
0000 0001
VREF (255/256)
0000 0000
VREF (256/256)
Stability
In the I-to-V configuration, the IOUT of the DAC and the inverting
node of the op amp must be connected as closely as possible, and
proper PCB layout techniques must be used. Because every code
change corresponds to a step function, gain peaking may occur
if the op amp has limited gain bandwidth product (GBP) and
there is excessive parasitic capacitance at the inverting node.
This parasitic capacitance introduces a pole into the open-loop
response, which can cause ringing or instability in the closed-
loop applications circuit.
As shown in Figure 38 and Figure 39, an optional compensation
capacitor, C1, can be added in parallel with RFBx for stability.
Too small a value of C1 can produce ringing at the output,
whereas too large a value can adversely affect the settling time.
C1 should be found empirically, but 1 pF to 2 pF is generally
adequate for the compensation.
04464-
008
IOUT1A
IOUT2A
AD5429/
AD5439/
AD5449
VREFx
VDD
C1
A1
VOUT = –VREF TO +VREF
R2
VDD
VREF ±10V
SDIN
SCLK
SYNC
MICROCONTROLLER
A2
R4
10k
R5
20k
NOTES
1. R1 AND R2 USED ONLY IF GAIN ADJUSTMENT IS REQUIRED.
2. MATCHING AND TRACKING IS ESSENTIAL FOR RESISTOR PAIRS
3. C1 PHASE COMPENSATION (1pF TO 2pF) MAY BE REQUIRED
4. DAC B AND ADDITIONAL PINS OMITTED FOR CLARITY.
IF A1/A2 IS A HIGH SPEED AMPLIFIER.
ADJUST R1 FOR VOUT = 0V WITH CODE 10000000 LOADED TO DAC.
R3 AND R4.
R3
20k
R1
RFBA
AGND
GND
R1
Figure 39. Bipolar Operation
相关PDF资料 |
PDF描述 |
|---|---|
| SY89834UMI | IC CLK BUF MUX TRNSLA 2:4 16-MLF |
| AD5060ARJZ-2REEL7 | IC DAC 16BIT SPI/SRL SOT23-8 |
| VI-J0V-MY | CONVERTER MOD DC/DC 5.8V 50W |
| VE-JTK-MX-B1 | CONVERTER MOD DC/DC 40V 75W |
| VI-J0T-MY | CONVERTER MOD DC/DC 6.5V 50W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD5439YRU-REEL | 制造商:Analog Devices 功能描述:DAC 2-CH R-2R 10-bit 16-Pin TSSOP T/R 制造商:Analog Devices 功能描述:DAC 2CH R-2R 10-BIT 16TSSOP - Tape and Reel |
| AD5439YRU-REEL7 | 制造商:Analog Devices 功能描述:DAC 2-CH R-2R 10-bit 16-Pin TSSOP T/R 制造商:Analog Devices 功能描述:DAC 2CH R-2R 10-BIT 16TSSOP - Tape and Reel |
| AD5439YRUZ | 功能描述:IC DAC DUAL 10BIT MULT 16-TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 设置时间:4µs 位数:12 数据接口:串行 转换器数目:2 电压电源:单电源 功率耗散（最大）:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-uMAX 包装:管件 输出数目和类型:2 电压，单极 采样率（每秒）:* 产品目录页面:1398 (CN2011-ZH PDF) |
| AD5439YRUZ-REEL | 功能描述:IC DAC DUAL 10BIT MULT 16TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 产品培训模块:LTC263x 12-, 10-, and 8-Bit VOUT DAC Family 特色产品:LTC2636 - Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference 标准包装:91 系列:- 设置时间:4µs 位数:10 数据接口:MICROWIRE?，串行，SPI? 转换器数目:8 电压电源:单电源 功率耗散（最大）:2.7mW 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-DFN-EP（4x3） 包装:管件 输出数目和类型:8 电压，单极 采样率（每秒）:* |
| AD5439YRUZ-REEL7 | 功能描述:IC DAC DUAL 10BIT MULT 16TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 产品培训模块:LTC263x 12-, 10-, and 8-Bit VOUT DAC Family 特色产品:LTC2636 - Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference 标准包装:91 系列:- 设置时间:4µs 位数:10 数据接口:MICROWIRE?，串行，SPI? 转换器数目:8 电压电源:单电源 功率耗散（最大）:2.7mW 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-DFN-EP（4x3） 包装:管件 输出数目和类型:8 电压，单极 采样率（每秒）:* |
发布紧急采购，3分钟左右您将得到回复。