参数资料
| 型号： | AD5415YRU |
| 厂商： | Analog Devices Inc |
| 文件页数： | 8/29页 |
| 文件大小： | 0K |
| 描述： | IC DAC DUAL 12BIT MULT 24-TSSOP |
| 产品培训模块： | Data Converter Fundamentals DAC Architectures |
| 标准包装： | 62 |
| 设置时间： | 120ns |
| 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）： | 3.5µW |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 24-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 |
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Data Sheet
AD5415
Rev. E | Page 15 of 28
GENERAL DESCRIPTION
DAC SECTION
The AD5415 is a 12-bit, dual-channel, current output DAC
consisting of standard inverting R-2R ladder configuration.
Figure 33 shows a simplified diagram of a single channel of the
AD5415. The feedback resistor RFB has a value of 2R. The value
of R is typically 10 kΩ (with a minimum of 8 kΩ and a
maximum of 12 kΩ). If IOUT1 and IOUT2 are kept at the same
potential, a constant current flows into each ladder leg,
regardless of the digital input code. Therefore, the input
resistance presented at VREF is always constant.
2R
S1
2R
S2
2R
S3
2R
S12
2R
DAC DATA LATCHES
AND DRIVERS
R
RFBA
IOUT1A
IOUT2A
VREFA
04461-032
RR
R
Figure 33. Simplified Ladder
Access is provided to the VREF, RFB, IOUT1, and IOUT2 terminals of
the DAC, making the device extremely versatile and allowing it
to be configured in several operating modes, such as unipolar
output, bipolar output, or single-supply mode.
CIRCUIT OPERATION
Unipolar Mode
Using a single op amp, this device can easily be configured to
provide 2-quadrant multiplying operation or a unipolar output
voltage swing, as shown in Figure 34.
When an output amplifier is connected in unipolar mode, the
output voltage is given by
VOUT = VREF × D/2n
where:
D is the fractional representation, in the range of 0 to 4,095, of
the digital word loaded to the DAC.
n is the number of bits.
Note that the output voltage polarity is opposite the VREF
polarity for dc reference voltages. This DAC is designed to
operate with either negative or positive reference voltages. The
VDD power pin is only used by the internal digital logic to drive
the on and off states of the DAC switches.
This DAC is also designed to accommodate ac reference input
signals in the range of 10 V to +10 V.
With a fixed 10 V reference, the circuit in Figure 34 gives a
unipolar 0 V to 10 V output voltage swing. When VIN is an
ac signal, the circuit performs 2-quadrant multiplication.
Table 5 shows the relationship between digital code and
expected output voltage for unipolar operation.
Table 5. Unipolar Code
Digital Input
Analog Output (V)
1111 1111 1111
VREF (4,095/4,096)
1000 0000 0000
VREF (2,048/4,096) = VREF/2
0000 0000 0001
VREF (1/4,096)
0000 0000 0000
VREF (0/4,096) = 0
IOUT1A
IOUT2A
RFBA
RFB
2R
R1
2R
AD5415
12-BIT DAC A
R
GND
SDIN
VREFA
SCLK
SYNC
R2
2R
R3
2R
R2A
R2_3A
R3A
VDD
C1
A1
VOUT = 0V TO –VIN
AGND
CONTROLLER
AGND
R1A
NOTES
1. DAC B OMITTED FOR CLARITY.
2. C1 PHASE COMPENSATION (1pF TO 2pF) MAY BE REQUIRED
IF A1 IS A HIGH SPEED AMPLIFIER.
04461-033
Figure 34. Unipolar Operation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD5415YRU-REEL | 制造商:Analog Devices 功能描述:DAC 2-CH R-2R 12-bit 24-Pin TSSOP T/R 制造商:Analog Devices 功能描述:DAC 2CH R-2R 12-BIT 24TSSOP - Tape and Reel |
| AD5415YRU-REEL7 | 功能描述:IC DAC DUAL 12BIT MULT 24-TSSOP RoHS:否 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）:* |
| AD5415YRUZ | 功能描述:IC DAC DUAL 12BIT MULT 24-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) |
| AD5415YRUZ-REEL | 功能描述:IC DAC 12BIT DUAL MULT 24-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: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）:* |
| AD5415YRUZ-REEL7 | 功能描述:IC DAC 12BIT DUAL MULT 24-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: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）:* |
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