参数资料
| 型号： | AD5755-1ACPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 42/52页 |
| 文件大小： | 0K |
| 描述： | IC DAC 16BIT SERIAL 64LFCSP |
| 视频文件： | AD5755: 16-Bit Multi-Channel, Voltage and Current Output DAC |
| 特色产品： | AD5755 / AD5755-1 / AD5757 DACs |
| 标准包装： | 1 |
| 设置时间： | 11µs |
| 位数： | 16 |
| 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，双 ± |
| 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，4 电压 |
| 采样率（每秒）： | * |
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Data Sheet
AD5755-1
Rev. E | Page 47 of 52
DRIVING INDUCTIVE LOADS
When driving inductive or poorly defined loads, a capacitor
may be required between IOUT_x and AGND to ensure stability.
A 0.01 F capacitor between IOUT_x and AGND ensures stability
of a load of 50 mH. The capacitive component of the load may
cause slower settling, although this may be masked by the set-
tling time of the AD5755-1. There is no maximum capacitance
limit for the current output of the AD5755-1.
TRANSIENT VOLTAGE PROTECTION
The AD5755-1 contains ESD protection diodes that prevent
damage from normal handling. The industrial control
environment can, however, subject I/O circuits to much higher
transients. To protect the AD5755-1 from excessively high
voltage transients, external power diodes and a surge current
typical value for RP is 10 . The two protection diodes and the
resistor (RP) must have appropriate power ratings.
RLOAD
RP
D2
D1
AVSS
AD5755-1
VBOOST_x
IOUT_x
AGND
09226-
079
RFILTER
CFILTER
0.1F
10
(FROM
DC-TO-DC
CONVERTER)
CDCDC
4.7F
Figure 86. 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.
The voltage output node can be protected with a similar circuit,
where D2 and the transorb are connected to AVSS. For the volt-
age output node, the +VSENSE_x pin should also be protected with
a large value series resistance to the transorb, such as 5 k. In
this way, the IOUT_x and VOUT_x pins can also be tied together and
share the same protection circuitry.
MICROPROCESSOR INTERFACING
Microprocessor interfacing to the AD5755-1 is via a serial bus
that uses a protocol compatible with microcontrollers and DSP
processors. The communications channel is a 3-wire minimum
interface consisting of a clock signal, a data signal, and a latch
signal. The AD5755-1 requires a 24-bit data-word with data
valid on the falling edge of SCLK.
The DAC output update is initiated on either 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.
AD5755-1-TO-ADSP-BF527 INTERFACE
The AD5755-1 can be connected directly to the SPORT
interface of the ADSP-BF527, an Analog Devices, Inc.,
Blackfin DSP. Figure 87 shows how the SPORT interface
can be connected to control the AD5755-1.
09226-
080
AD5755-1
SYNC
SCLK
SDIN
LDAC
SPORT_TFS
SPORT_TSCK
SPORT_DTO
GPIO0
ADSP-BF527
Figure 87. AD5755-1-to-ADSP-BF527 SPORT Interface
LAYOUT GUIDELINES
Grounding
In any circuit where accuracy is important, careful consideration
of the power supply and ground return layout helps to ensure
the rated performance. The printed circuit board on which the
AD5755-1 is mounted should be designed so that the analog
and digital sections are separated and confined to certain areas of
the board. If the AD5755-1 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 and 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 AD5755-1 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
capacitor 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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| AD5755-1ACPZ-REEL7 | 功能描述:IC DAC 16BIT SERIAL 64LFCSP 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:Data Converter Fundamentals DAC Architectures 标准包装:750 系列:- 设置时间:7µs 位数:16 数据接口:并联 转换器数目:1 电压电源:双 ± 功率耗散（最大）:100mW 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-LCC（J 形引线） 供应商设备封装:28-PLCC（11.51x11.51） 包装:带卷 (TR) 输出数目和类型:1 电压，单极；1 电压，双极 采样率（每秒）:143k |
| AD5755-1X | 制造商:AD 制造商全称:Analog Devices 功能描述:Quad Channel, 16-Bit, Serial Input, 4-20mA & Voltage Output DAC, Dynamic Power Control, HART Connectivity |
| AD5755ACPZ | 功能描述:数模转换器- DAC 16Bit Quad V/I DAC with Dynamic Power RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| AD5755ACPZ-REEL7 | 功能描述:IC DAC 16BIT QUAD 64-LFCSP 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) |
| AD5755BCPZ | 制造商:Analog Devices 功能描述: 制造商:Analog Devices 功能描述:DAC QUAD 16BIT -26.4/33VIN 64LFCSP 制造商:Analog Devices 功能描述:DAC, QUAD, 16BIT, -26.4/33VIN, 64LFCSP 制造商:Analog Devices 功能描述:DAC, QUAD, 16BIT, -26.4/33VIN, 64LFCSP, Resolution (Bits):16bit, Input Channel Type:Serial, Digital IC Case Style:LFCSP, No. of Pins:64, Data Interface:Microwire, QSPI, SPI, Supply Current:8.6mA, Operating Temperature Min:-40C, , RoHS Compliant: Yes |
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