参数资料
| 型号： | AD5732RBREZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 22/32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 29 of 32
DESIGN FEATURES
ANALOG OUTPUT CONTROL
In many industrial process control applications, it is vital that
the output voltage be controlled during power-up. When the
supply voltages change during power-up, the VOUT pins are
clamped to 0 V via a low impedance path (approximately 4 kΩ).
To prevent the output amplifiers from being shorted to 0 V
during this time, Transmission Gate G1 is also opened (see
Figure 48). These conditions are maintained until the power
supplies have stabilized and a valid word is written to a DAC
register. At this time, G2 opens and G1 closes.
VOUTA
G1
G2
VOLTAGE
MONITOR
AND
CONTROL
0
64
66
-0
10
Figure 48. Analog Output Control Circuitry
POWER-DOWN MODE
Each DAC channel of the AD5722R/AD5732R/AD5752R can
be individually powered down. By default, all channels are in
power-down mode. The power status is controlled by the power
channel is in power-down mode, its output pin is clamped to
ground through a resistance of approximately 4 kΩ, and the
output of the amplifier is disconnected from the output pin.
OVERCURRENT PROTECTION
Each DAC channel of the AD5722R/AD5732R/AD5752R
incorporates individual overcurrent protection. The user has
two options for the configuration of the overcurrent protection:
constant current clamp or automatic channel power-down. The
configuration of the overcurrent protection is selected via the
clamp enable bit in the control register.
Constant Current Clamp (Clamp Enable = 1)
If a short circuit occurs in this configuration, the current is
clamped at 20 mA. This event is signaled to the user by the
setting of the appropriate overcurrent (OCX) bit in the power
control register. Upon removal of the short-circuit fault, the
OCX bit is cleared.
Automatic Channel Power-Down (Clamp Enable = 0)
If a short circuit occurs in this configuration, the shorted
channel powers down, and its output is clamped to ground via a
resistance of approximately 4 kΩ. At this time, the output of the
amplifier is also disconnected from the output pin. The short-
circuit event is signaled to the user via the overcurrent (OCX)
bits, and the power-up (PUX) bits indicate which channels have
powered down. After the fault is rectified, the channels can be
powered up again by setting the PUX bits.
THERMAL SHUTDOWN
The AD5722R/AD5732R/AD5752R incorporate a thermal
shutdown feature that automatically shuts down the device if
the core temperature exceeds approximately 150°C. The thermal
shutdown feature is disabled by default and can be enabled via
the TSD enable bit of the control register. In the event of a
thermal shutdown, the TSD bit of the power control register is set.
INTERNAL REFERENCE
The on-chip voltage reference is powered down by default. If an
external voltage reference source is to be used, the internal
reference must remain powered down at all times. If the
internal reference is to be used as the reference source, it must
be powered up via the PUREF bit of the power control register.
The internal reference voltage is accessible at the REFIN/REFOUT
pin for use as a reference source for other devices within the
system. If the internal reference is to be used external to the
AD5722R/AD5732R/AD5752R, it must first be buffered.
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相关代理商/技术参数 |
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| 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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