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參數(shù)資料
| 型號： | AD5722AREZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 10/32頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC DUAL 12BIT 1LSB 24TSSOP |
| 產(chǎn)品培訓模塊： | Data Converter Fundamentals DAC Architectures |
| 設(shè)計資源： | Software Configurable 12-Bit Dual-Channel Unipolar/Bipolar Voltage Output Using AD5722 (CN0094) |
| 標準包裝： | 62 |
| 設(shè)置時間： | 10µs |
| 位數(shù)： | 12 |
| 數(shù)據(jù)接口： | 串行 |
| 轉(zhuǎn)換器數(shù)目： | 2 |
| 電壓電源： | 模擬和數(shù)字，雙 ± |
| 功率耗散（最大）： | 190mW |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-TSSOP（0.173"，4.40mm）裸露焊盤 |
| 供應商設(shè)備封裝： | 24-TSSOP 裸露焊盤 |
| 包裝： | 管件 |
| 輸出數(shù)目和類型： | 2 電壓，單極；2 電壓，雙極 |
| 采樣率（每秒）： | * |
| 產(chǎn)品目錄頁面： | 784 (CN2011-ZH PDF) |
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AD5722/AD5732/AD5752
Rev. D | Page 18 of 32
THEORY OF OPERATION
The AD5722/AD5732/AD5752 are dual, 12-/14-/16-bit, serial
input, unipolar/bipolar, voltage output DACs. They operate
from unipolar supply voltages of +4.5 V to +16.5 V or bipolar
supply voltages of ±4.5 V to ±16.5 V. In addition, the parts have
software-selectable output ranges of +5 V, +10 V, +10.8 V, ±5 V,
±10 V, and ±10.8 V. Data is written to the AD5722/AD5732/
AD5752 in a 24-bit word format via a 3-wire serial interface.
The devices also offer an SDO pin to facilitate daisy-chaining
or readback.
The AD5722/AD5732/AD5752 incorporate a power-on reset
circuit to ensure that the DAC registers power up loaded with
0x0000. When powered on, the outputs are clamped to 0 V via
a low impedance path.
ARCHITECTURE
The DAC architecture consists of a string DAC followed by an
output amplifier. Figure 38 shows a block diagram of the DAC
architecture. The reference input is buffered before being
applied to the DAC.
GND
RESISTOR
STRING
REF (+)
REF (–)
CONFIGURABLE
OUTPUT
AMPLIFIER
OUTPUT
RANGE CONTROL
06
46
7-
00
6
REFIN
DAC REGISTER
VOUTX
Figure 38. DAC Architecture Block Diagram
The resistor string structure is shown in Figure 39. It is a string
of resistors, each of value R. The code loaded to the DAC register
determines the node on the string where the voltage is to be
tapped off and fed into the output amplifier. The voltage is
tapped off by closing one of the switches connecting the string
to the amplifier. Because it is a string of resistors, it is guaranteed
monotonic.
R
TO OUTPUT
AMPLIFIER
REFIN
06
46
7-
0
07
Figure 39. Resistor String Structure
Output Amplifiers
The output amplifiers are capable of generating both unipolar
and bipolar output voltages. They are capable of driving a load
of 2 kΩ in parallel with 4000 pF to GND. The source and sink
capabilities of the output amplifiers can be seen in Figure 26.
The slew rate is 3.5 V/μs with a full-scale settling time of 10 μs.
Reference Buffers
The AD5722/AD5732/AD5752 require an external reference
source. The reference input has an input range of 2 V to 3 V,
with 2.5 V for specified performance. This input voltage is then
buffered before it is applied to the DAC cores.
SERIAL INTERFACE
The AD5722/AD5732/AD5752 are controlled over a versatile
3-wire serial interface that operates at clock rates up to 30 MHz.
It 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. The timing diagram for this operation is shown in Figure 2.
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| AD5722AREZ-REEL7 | 功能描述:IC DAC DUAL 12BIT 1LSB 24TSSOP 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)品培訓模塊:LTC263x 12-, 10-, and 8-Bit VOUT DAC Family 特色產(chǎn)品:LTC2636 - Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference 標準包裝:91 系列:- 設(shè)置時間:4µs 位數(shù):10 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:8 電壓電源:單電源 功率耗散（最大）:2.7mW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應商設(shè)備封裝:14-DFN-EP（4x3） 包裝:管件 輸出數(shù)目和類型:8 電壓，單極 采樣率（每秒）:* |
| AD5722R | 制造商:AD 制造商全稱:Analog Devices 功能描述:Complete, Dual, 12-/14-/16-Bit, Serial Input, Unipolar/Bipolar, Voltage Output DACs |
| AD5722RBREZ | 功能描述:IC DAC DUAL 12BIT 1LSB 24TSSOP 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)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 設(shè)置時間: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)品目錄頁面:1398 (CN2011-ZH PDF) |
| AD5722RBREZ-REEL7 | 功能描述:IC DAC DUAL 12BIT 1LSB 24TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 標準包裝:47 系列:- 設(shè)置時間:2µs 位數(shù):14 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 電壓電源:單電源 功率耗散（最大）:55µW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應商設(shè)備封裝:28-SSOP 包裝:管件 輸出數(shù)目和類型:1 電流，單極；1 電流，雙極 采樣率（每秒）:* |
| AD5724 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Complete, Quad, 12-/14-/16-Bit, Serial Input, Unipolar/Bipolar Voltage Output DACs |
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