参数资料
| 型号： | AD5421CREZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 5/36页 |
| 文件大小： | 0K |
| 描述： | IC DAC 16BIT SPI/SRL 28TSSOP |
| 标准包装： | 2,500 |
| 设置时间： | 50µs |
| 位数： | 16 |
| 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）： | 625mW |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 输出数目和类型： | 1 电压，单极 |
| 采样率（每秒）： | * |
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Data Sheet
AD5421
Rev. G | Page 13 of 36
Pin No.
Mnemonic
Description
TSSOP
LFCSP
13, 14
4, 11, 12
COM
Ground Reference Pin for the AD5421. It is recommended that a 4.7 V Zener diode be placed
between the LOOP and COM pins. See the Applications Information section for more
information.
15, 16,
17
13, 14, 15
REG_SEL2,
REG_SEL1,
REG_SEL0
section).
18
17
REFIN
Reference Voltage Input. VREFIN = 2.5 V for specified performance.
19
18
REFOUT2
Internal Reference Voltage Output (1.22 V). It is recommended to connect a 100 nF capacitor
from this pin to COM.
20
19
REFOUT1
Internal Reference Voltage Output (2.5 V). It is recommended to connect a 100 nF capacitor from
this pin to COM.
21
20
CIN
External Capacitor Connection and HART FSK Input. An external capacitor connected from CIN to
COM implements an output slew rate control function (see the Loop Current Slew Rate Control
section). HART FSK signaling can also be coupled through a capacitor to this pin (see the HART
Communications section).
22, 23
21, 22
REXT1, REXT2
Connection for External Current Setting Resistor. A precision 24 k resistor can be connected
between these pins for improved performance.
24
23
LOOP
Loop Current Return Pin. As shown in Figure 1, the COM and LOOP pins can be used to sense
the loop current across the internal 52 resistor. Note that the voltage measured at LOOP will
be negative with respect to COM.
25
23
VLOOP
Voltage Input Pin. Voltage input range is 0 V to 2.5 V. The voltage applied to this pin is digitized to
eight bits, which are available in the fault register. This pin can be used for general-purpose
voltage monitoring, but it is intended for monitoring of the loop supply voltage. Connecting the
loop voltage to this pin via a 20:1 resistor divider allows the AD5421 to monitor and feedback
the loop voltage. The AD5421 also generates an alert if the loop voltage is close to the minimum
operating value (see the Loop Voltage Fault section).
26
DRIVE
Gate Connection for External Depletion Mode MOSFET. For more information, see the
27
REGIN
Voltage Regulator Input. The loop voltage can be connected directly to this pin. Or, to reduce on-
chip power dissipation, an external pass transistor can be connected at this pin to stand off the
loop voltage. For more information, see the Connection to Loop Power Supply section.
28
REGOUT
Voltage Regulator Output. Pin selectable values are from 1.8 V to 12 V via the REG_SEL0,
REG_SEL1, and REG_SEL2 pins (see the Voltage Regulator section). If REGOUT is driving a
microconverter supply (see Figure 50), this pin should be decoupled to COM with a >1 μF
capacitor.
N/A1
9, 16, 25
NC
No Connect. Do not connect to this pin.
EPAD
Exposed Pad
The exposed paddle should be connected to the same potential as the COM pin and to a copper
plane for optimum thermal performance.
1
N/A means not applicable.
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| AD5421CREZ-RL7 | 功能描述:IC DAC 16BIT SPI/SRL 28TSSOP 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）:* |
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| AD5422ACPZ | 制造商:AD 制造商全称:Analog Devices 功能描述:Single Channel, 12/16-Bit, Serial Input, Current Source & Voltage Output DAC |
| AD5422ACPZ-REEL | 功能描述:IC DAC 16BIT SRL 40LFCSP 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）:* |
| AD5422ACPZ-REEL7 | 功能描述:IC DAC 16BIT SRL 40LFCSP 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）:* |
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