参数资料
| 型号： | AD5737ACPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 36/44页 |
| 文件大小： | 0K |
| 描述： | IC DAC QUAD 12BIT CUR 64-LFCSP |
| 标准包装： | 1 |
| 设置时间： | 15µs |
| 位数： | 12 |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 4 |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 64-LFCSP-VQ（9x9） |
| 包装： | 托盘 |
| 输出数目和类型： | 4 电流，单极 |
| 采样率（每秒）： | * |
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Data Sheet
AD5737
Rev. C | Page 41 of 44
TRANSIENT VOLTAGE PROTECTION
The AD5737 contains ESD protection diodes that prevent dam-
age from normal handling. The industrial control environment
can, however, subject I/O circuits to much higher transients. To
protect the AD5737 from excessively high voltage transients,
external power diodes and a surge current limiting resistor (RP)
The two protection diodes and the resistor (RP) must have appro-
priate power ratings.
RLOAD
R
D1
D2
P
AD5737
VBOOST_x
IOUT_x
AGND
CDCDC
4.7F
CFILTER
0.1F
RFILTER
10
(FROM
DC-TO-DC
CONVERTER)
10067-
079
Figure 62. Output Transient Voltage Protection
Further protection can be provided using transient voltage
suppressors (TVSs), also referred to as transorbs. These compo-
nents are available as unidirectional suppressors, which protect
against positive high voltage transients, and as bidirectional
suppressors, which protect against both positive and negative
high voltage transients. Transient voltage suppressors are avail-
able in a wide range of standoff and breakdown voltage ratings.
The TVS should be sized with the lowest breakdown voltage
possible while not conducting in the functional range of the
current output.
It is recommended that all field connected nodes be protected.
MICROPROCESSOR INTERFACING
Microprocessor interfacing to the AD5737 is via a serial bus
that uses a protocol compatible with microcontrollers and DSP
processors. The communication channel is a 3-wire minimum
interface consisting of a clock signal, a data signal, and a latch
signal. The AD5737 requires a 24-bit data-word with data valid
on the falling edge of SCLK.
The DAC output update is initiated either on the rising edge of
LDAC or, if LDAC is held low, on the rising edge of SYNC. The
contents of the registers can be read using the readback function.
AD5737-to-ADSP-BF527 Interface
The AD5737 can be connected directly to the SPORT interface
of the ADSP-BF527, an Analog Devices, Inc., Blackfin DSP.
Figure 63 shows how the SPORT interface can be connected
to control the AD5737.
AD5737
SYNC
SCLK
SDIN
LDAC
SPORT_TFS
SPORT_TSCLK
SPORT_DT0
GPIO0
ADSP-BF527
10067-
080
Figure 63. AD5737-to-ADSP-BF527 SPORT Interface
LAYOUT GUIDELINES
Grounding
In any circuit where accuracy is important, careful consider-
ation of the power supply and ground return layout helps to
ensure the rated performance. The printed circuit board on
which the AD5737 is mounted should be designed so that the
analog and digital sections are separated and confined to
certain areas of the board. If the AD5737 is in a system where
multiple devices require an AGND-to-DGND connection, the
connection should be made at one point only. The star ground
point should be established as close as possible to the device.
The GNDSWx pin and the ground connection for the AVCC
supply are referred to as PGND. PGND should be confined to
certain areas of the board, and the PGND-to-AGND connection
should be made at one point only.
Supply Decoupling
The AD5737 should have ample supply bypassing of 10 F
in parallel with 0.1 F on each supply, located as close to the
package as possible, ideally right up against the device. The
10 F capacitors are the tantalum bead type. The 0.1 F cap-
acitors should have low effective series resistance (ESR) and low
effective series inductance (ESL), such as the common ceramic
types, which provide a low impedance path to ground at high
frequencies to handle transient currents due to internal logic
switching.
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相关代理商/技术参数 |
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| AD5737ACPZ-RL7 | 制造商:AD 制造商全称:Analog Devices 功能描述:Quad-Channel, 12-Bit, Serial Input, 4 mA to 20 mA Output |
| AD5737X | 制造商:AD 制造商全称:Analog Devices 功能描述:Quad Channel, 16-Bit, Serial Input, 4-20mA Output DAC, Dynamic Power Control, HART Connectivity |
| AD573JD | 功能描述:IC ADC 10BIT SAR REG 20-CDIP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:12 采样率（每秒）:3M 数据接口:- 转换器数目:- 功率耗散（最大）:- 电压电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-23-6 包装:带卷 (TR) 输入数目和类型:- |
| AD573JN | 功能描述:IC ADC 10BIT SAR REGISTER 20-DIP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| AD573JNZ | 功能描述:IC ADC 10BIT SAR REGISTER 20-DIP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:microPOWER™ 位数:8 采样率（每秒）:1M 数据接口:串行，SPI? 转换器数目:1 功率耗散（最大）:- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘（4x4） 包装:Digi-Reel® 输入数目和类型:8 个单端，单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6 |
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