參數(shù)資料
型號(hào)： AD5764
廠商： Analog Devices, Inc.
英文描述： Complete, Quad, 16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC
中文描述： 完整，四路，16位，高精度，串行輸入，雙極性電壓輸出DAC
文件頁(yè)數(shù)： 16/27頁(yè)
文件大?。?/td> 251K
代理商： AD5764
AD5764
Preliminary Technical Data
GENERAL DESCRIPTION
The AD5764 is a quad 16-bit, serial input, bipolar voltage
output DAC. It operates from supply voltages of ±11.4 V to
±16.5 V and has a buffered output voltage of up to ± 10.25 V.
Data is written to the AD5764 in a 24-bit word format, via a 3-
wire serial interface. The device also offers an SDO pin, which
is available for daisy chaining or readback.
Rev. PrC 21-Oct-04| Page 16 of 28
The AD5764 incorporates a power-on reset circuit, which
ensures that the DAC outputs power up to 0V. The AD5764 also
features a digital I/O port that may be programmed via the
serial interface, an analog temperature sensor, on-chip 10
ppm/°C voltage reference, on-chip reference buffers and per
channel digital gain and offset registers.
DAC ARCHITECTURE
The DAC architecture of the AD5764 consists of a 16-bit
current-mode segmented R-2R DAC. The simplified circuit
diagram for the DAC section is shown in Figure 13.
The four MSBs of the 16-bit data word are decoded to drive 15
switches, E1 to E15. Each of these switches connects one of the
15 matched resistors to either AGND or IOUT. The remaining
12 bits of the data word drive switches S0 to S11 of the 12-bit R-
2R ladder network.
2R
E15
Vref
2R
E14
E1
2R
S11
R
R
R
2R
S10
2R
12 BIT R-2R LADDER
V
OUT
2R
S0
2R
AGND
R/8
4 MSBs DECODED INTO
15 EQUAL SEGMENTS
Figure 7. DAC Ladder Structure
REFERENCE BUFFERS
The AD5764 can operate with either an external or internal
reference. The reference inputs (REFAB and REFCD) have an
input range up to 5 V. This input voltage is then used to provide
a buffered positive and negative reference for the DAC cores.
The positive reference is given by
+ V
REF
= 2* V
REF
While the negative reference to the DAC cores is given by
-V
REF
= -2*V
REF
These positive and negative reference voltages (along with the
gain register values) define the output ranges of the DACs.
SERIAL INTERFACE
The AD5764 is controlled over a versatile 3-wire serial interface
that operates at clock rates up to 30 MHz and 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 as shown in Table 6. The timing diagram for this operation
is shown in Figure 2.
Upon power-up the DAC registers are loaded with zero code
(0x0000). The corresponding output voltage depends on the
state of the BIN/2sCOMP pin. If the BIN/2sCOMP pin is tied to
DGND then the data coding is 2sComplement and the outputs
will power-up to 0V. If the BIN/2sCOMP pin is tied high then
the data coding is straight binary and the outputs will power-up
to Negative Full-scale.
Standalone Operation
The serial interface works with both a continuous and noncon-
tinuous serial clock. A continuous SCLK source can only be
used if SYNC is held low for the correct number of clock cycles.
In gated clock mode, a burst clock containing the exact number
of clock cycles must be used and SYNC must be taken high after
the final clock to latch the data. The first falling edge of SYNC
starts the write cycle. Exactly 24 falling clock edges must be
applied to SCLK before SYNC is brought back high again; if
SYNC is brought high before the 24
th
falling SCLK edge, the
write is aborted. If more than 24 falling SCLK edges are applied
before SYNC is brought high, the input data will be corrupted.
The input register addressed is updated on the rising edge of
SYNC. In order for another serial transfer to take place, SYNC
must be brought low again. After the end of the serial data
transfer, data is automatically transferred from the input shift
register to the input register of the addressed DAC.
When the data has been transferred into the input register of
the addressed DAC, all DAC registers and outputs can be
updated by taking LDAC low while SYNC is high.
相關(guān)PDF資料
PDF描述
AD5764ASU Complete, Quad, 16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC
AD5764BSU Complete, Quad, 16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC
AD5764CSU Complete, Quad, 16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC
AD578LD VERY FAST, COMPLETE 10- OR 12-BIT A/D CONVERTERS
AD578LN Enhanced, 1.8V, PCI-Express Compliant, 4-Differential Channel, 2:1 Mux/DeMux Switch, w/ Single Enable
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD5764ASU 制造商:AD 制造商全稱:Analog Devices 功能描述:Complete, Quad, 14/16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC
AD5764ASUZ 功能描述:IC DAC 16BIT QUAD VOUT 32-TQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 設(shè)置時(shí)間:4µs 位數(shù):12 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 電壓電源:單電源 功率耗散（最大）:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-uMAX 包裝:管件 輸出數(shù)目和類型:2 電壓，單極 采樣率（每秒）:* 產(chǎn)品目錄頁(yè)面:1398 (CN2011-ZH PDF)
AD5764ASUZ-REEL7 功能描述:IC DAC 16BIT QUAD VOUT 32-TQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Data Converter Fundamentals DAC Architectures 標(biāo)準(zhǔn)包裝:750 系列:- 設(shè)置時(shí)間:7µs 位數(shù):16 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 電壓電源:雙 ± 功率耗散（最大）:100mW 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-LCC（J 形引線） 供應(yīng)商設(shè)備封裝:28-PLCC（11.51x11.51） 包裝:帶卷 (TR) 輸出數(shù)目和類型:1 電壓，單極；1 電壓，雙極 采樣率（每秒）:143k
AD5764BSU 制造商:Analog Devices 功能描述:
AD5764BSUZ 功能描述:IC DAC 16BIT QUAD VOUT 32-TQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 設(shè)置時(shí)間:4µs 位數(shù):12 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 電壓電源:單電源 功率耗散（最大）:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-uMAX 包裝:管件 輸出數(shù)目和類型:2 電壓，單極 采樣率（每秒）:* 產(chǎn)品目錄頁(yè)面:1398 (CN2011-ZH PDF)
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*