参数资料
| 型号： | AD5732RBREZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/32页 |
| 文件大小： | 0K |
| 描述： | IC DAC DUAL 14BIT SERIAL 24TSSOP |
| 产品培训模块： | Data Converter Fundamentals DAC Architectures |
| 设计资源： | Software Configurable 14-Bit Dual-Channel Unipolar/Bipolar Voltage Output Using AD5732R (CN0090) |
| 标准包装： | 62 |
| 设置时间： | 10µs |
| 位数： | 14 |
| 数据接口： | 串行 |
| 转换器数目： | 2 |
| 电压电源： | 模拟和数字，双 ± |
| 功率耗散（最大）： | 190mW |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 24-TSSOP 裸露焊盘 |
| 包装： | 管件 |
| 输出数目和类型： | 2 电压，单极；2 电压，双极 |
| 采样率（每秒）： | 1.07M |
| 产品目录页面： | 784 (CN2011-ZH PDF) |
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AD5722R/AD5732R/AD5752R
Rev. D | Page 20 of 32
THEORY OF OPERATION
The AD5722R/AD5732R/AD5752R are dual, 12-/14-/16-bit,
serial input, unipolar/bipolar, voltage output DACs. They
operate from unipolar supply voltages of +4.5 V to +16.5 V or
bipolar supply voltages of ±4.5 V to ±16.5 V. In addition, the
parts have software-selectable output ranges of +5 V, +10 V,
+10.8 V, ±5 V, ±10 V, and ±10.8 V. Data is written to the
AD5722R/AD5732R/AD5752R in a 24-bit word format via a
3-wire serial interface. The devices also offer an SDO pin to
facilitate daisy chaining or readback.
The AD5722R/AD5732R/AD5752R incorporate a power-on
reset circuit to ensure that the DAC registers power up loaded
with 0x0000. When powered on, the outputs are clamped to 0 V
via a low impedance path. The parts also feature on-chip
reference and reference buffers.
ARCHITECTURE
The DAC architecture consists of a string DAC followed by an
output amplifier. Figure 44 shows a block diagram of the DAC
architecture. The reference input is buffered before being
applied to the DAC.
GND
RESISTOR
STRING
REF (+)
REF (–)
CONFIGURABLE
OUTPUT
AMPLIFIER
OUTPUT
RANGE CONTROL
0
646
6-
0
06
REFIN
DAC REGISTER
VOUTx
Figure 44. DAC Architecture Block Diagram
The resistor string structure is shown in Figure 45. It is a string
of resistors, each of value R. The code loaded to the DAC register
determines the node on the string where the voltage is to be
tapped off and fed into the output amplifier. The voltage is
tapped off by closing one of the switches connecting the string
to the amplifier. Because it is a string of resistors, it is guaranteed
monotonic.
R
TO OUTPUT
AMPLIFIER
REFIN
06
46
6-
00
7
Figure 45. Resistor String Structure
Output Amplifiers
The output amplifiers are capable of generating both unipolar
and bipolar output voltages. They are capable of driving a load
of 2 kΩ in parallel with 4000 pF to GND. The source and sink
capabilities of the output amplifiers can be seen in Figure 24.
The slew rate is 4.5 V/μs with a full-scale settling time of 10 μs.
Reference Buffers
The AD5722R/AD5732R/AD5752R can operate with either an
external or internal reference. The reference input has an input
range of 2 V to 3 V, with 2.5 V for specified performance. This
input voltage is then buffered before it is applied to the DAC cores.
SERIAL INTERFACE
The AD5722R/AD5732R/AD5752R are controlled over a
versatile 3-wire serial interface that operates at clock rates up to
30 MHz. It is compatible with SPI, QSPI, MICROWIRE, and
DSP standards.
Input Shift Register
The input shift register is 24 bits wide. Data is loaded into the
device MSB first as a 24-bit word under the control of a serial
clock input, SCLK. The input register consists of a read/write
bit, three register select bits, three DAC address bits, and 16 data
bits. The timing diagram for this operation is shown in Figure 2.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD5732RBREZ-REEL7 | 功能描述:IC DAC DUAL 14BIT SERIAL 24TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 标准包装:47 系列:- 设置时间:2µs 位数:14 数据接口:并联 转换器数目:1 电压电源:单电源 功率耗散（最大）:55µW 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:管件 输出数目和类型:1 电流，单极；1 电流，双极 采样率（每秒）:* |
| AD5734 | 制造商:AD 制造商全称:Analog Devices 功能描述:Complete, Quad, 12-/14-/16-Bit, Serial Input, Unipolar/Bipolar Voltage Output DACs |
| AD5734AREZ | 功能描述:IC DAC 14BIT DSP/SRL 24TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 标准包装:1 系列:- 设置时间:4.5µs 位数:12 数据接口:串行，SPI? 转换器数目:1 电压电源:单电源 功率耗散（最大）:- 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOICN 包装:剪切带 (CT) 输出数目和类型:1 电压，单极；1 电压，双极 采样率（每秒）:* 其它名称:MCP4921T-E/SNCTMCP4921T-E/SNRCTMCP4921T-E/SNRCT-ND |
| AD5734AREZ-REEL7 | 功能描述:IC DAC 14BIT DSP/SRL 24TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 标准包装:47 系列:- 设置时间:2µs 位数:14 数据接口:并联 转换器数目:1 电压电源:单电源 功率耗散（最大）:55µW 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:管件 输出数目和类型:1 电流，单极；1 电流，双极 采样率（每秒）:* |
| AD5734R | 制造商:AD 制造商全称:Analog Devices 功能描述:Complete, Quad, 12-/14-/16-Bit, Serial Input, Unipolar/Bipolar Voltage Output DACs |
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