參數(shù)資料
型號(hào): AD5439YRUZ-REEL7
廠商: Analog Devices Inc
文件頁(yè)數(shù): 8/29頁(yè)
文件大小: 0K
描述: IC DAC DUAL 10BIT MULT 16TSSOP
產(chǎn)品培訓(xùn)模塊: Data Converter Fundamentals
DAC Architectures
標(biāo)準(zhǔn)包裝: 1,000
設(shè)置時(shí)間: 35ns
位數(shù): 10
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): 3.5µW
工作溫度: -40°C ~ 125°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 16-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 16-TSSOP
包裝: 帶卷 (TR)
輸出數(shù)目和類(lèi)型: 4 電流,單極;4 電流,雙極
采樣率(每秒): 2.47M
其它名稱(chēng): AD5439YRUZ-REEL7TR
Data Sheet
AD5429/AD5439/AD5449
Rev. E | Page 15 of 28
THEORY OF OPERATION
DIGITAL-TO-ANALOG CONVERTER
The AD5429/AD5439/AD5449 are 8-, 10-, and 12-bit, dual-
channel, current output DACs consisting of a standard inverting
R-2R ladder configuration. Figure 37 shows a simplified diagram
for a single channel of the AD5449. The feedback resistor, RFBA,
has a value of R. The value of R is typically 10 kΩ (with a
minimum of 8 kΩ and a maximum of 12 kΩ). If IOUT1A and
IOUT2A are kept at the same potential, a constant current flows
into each ladder leg, regardless of digital input code. Therefore,
the input resistance presented at VREFA is always constant.
2R
S1
2R
S2
2R
S3
2R
S12
2R
DAC DATA LATCHES
AND DRIVERS
R
RFBA
IOUT1A
IOUT2A
VREFA
04464-006
RR
R
Figure 37. Simplified Ladder
Access is provided to the VREFx, RFBx, IOUT1x, and IOUT2x termi-
nals of the DACs, making the devices extremely versatile and
allowing them to be configured in several operating modes, such
as unipolar mode, bipolar output mode, or single-supply mode.
CIRCUIT OPERATION
Unipolar Mode
Using a single op amp, these devices can easily be configured to
provide 2-quadrant multiplying operation or a unipolar output
voltage swing, as shown in Figure 38.
When an output amplifier is connected in unipolar mode, the
output voltage is given by
n
REF
OUT
D
V
2
/
where:
D
is the fractional representation of the digital word loaded to
the DAC.
D
= 0 to 255 (AD5429)
= 0 to 1023 (AD5439)
= 0 to 4095 (AD5449)
n
is the number of bits.
With a fixed 10 V reference, the circuit shown in Figure 38 gives
a unipolar 0 V to 10 V output voltage swing. When VIN is an ac
signal, the circuit performs 2-quadrant multiplication.
Table 5 shows the relationship between digital code and the
expected output voltage for unipolar operation using the 8-bit
AD5429 DAC.
Table 5. Unipolar Code Table
Digital Input
Analog Output (V)
1111 1111
VREF (255/256)
1000 0000
VREF (128/256) = VREF/2
0000 0001
VREF (1/256)
0000 0000
VREF (0/256) = 0
AD5429/
AD5439/
AD5449
04
46
4-
0
07
NOTES
1. R1 AND R2 USED ONLY IF GAIN ADJUSTMENT IS REQUIRED.
2. C1 PHASE COMPENSATION (1pF TO 2pF) MAY BE REQUIRED
3. DAC B OMITTED FOR CLARITY.
IOUT1A
IOUT2A
VREFx
VDD
C1
A1
VOUT = 0V TO –VREF
AGND
R2
VDD
VREF
SDIN
GND
SCLK
SYNC
RFBA
R1
IF A1 IS A HIGH SPEED AMPLIFIER.
MICROCONTROLLER
Figure 38. Unipolar Operation
相關(guān)PDF資料
PDF描述
SI5330G-A00218-GM IC CLK BUFFER TRANSLA 1:8 24-QFN
SI5330G-A00217-GM IC CLK BUFFER TRANSLA 1:8 24-QFN
VE-263-MW-F4 CONVERTER MOD DC/DC 24V 100W
SI5330F-A00216-GM IC CLK BUFFER TRANSLA 1:8 24-QFN
SI5330F-A00215-GM IC CLK BUFFER TRANSLA 1:8 24-QFN
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD544 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:High Performance, BiFET Operational Amplifiers
AD5440 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Dual 8-,10-,12-Bit High Bandwidth Multiplying DACs with Serial Interface
AD5440YRU 功能描述:IC DAC 10BIT DUAL MULT 24-TSSOP RoHS:否 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:47 系列:- 設(shè)置時(shí)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(lèi)型:表面貼裝 封裝/外殼:28-SSOP(0.209",5.30mm 寬) 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:管件 輸出數(shù)目和類(lèi)型:1 電流,單極;1 電流,雙極 采樣率(每秒):*
AD5440YRU-REEL 功能描述:IC DAC 10BIT MULTIPLYING 24TSSOP RoHS:否 類(lèi)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: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(biāo)準(zhǔn)包裝:91 系列:- 設(shè)置時(shí)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(lèi)型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:14-DFN-EP(4x3) 包裝:管件 輸出數(shù)目和類(lèi)型:8 電壓,單極 采樣率(每秒):*
AD5440YRU-REEL7 功能描述:IC DAC 10BIT MULTIPLYING 24TSSOP RoHS:否 類(lèi)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: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(biāo)準(zhǔn)包裝:91 系列:- 設(shè)置時(shí)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(lèi)型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:14-DFN-EP(4x3) 包裝:管件 輸出數(shù)目和類(lèi)型:8 電壓,單極 采樣率(每秒):*