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參數(shù)資料
| 型號： | AD5439YRU |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | DIODE ZENER SINGLE 200mW 3.9Vz 20mA-Izt 0.05 10uA-Ir 1 SOD-323 3K/REEL |
| 中文描述： | SERIAL INPUT LOADING, 0.08 us SETTLING TIME, 10-BIT DAC, PDSO16 |
| 封裝： | ROHS COMPLIANT, MO-153AB, TSSOP-16 |
| 文件頁數(shù)： | 17/32頁 |
| 文件大小： | 860K |
| 代理商： | AD5439YRU |
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AD5429/AD5439/AD5449
SINGLE-SUPPLY APPLICATIONS
Voltage-Switching Mode
Figure 39 shows the DACs operating in voltage-switching mode.
The reference voltage, V
IN
, is applied to the I
OUT
1 pin, I
OUT
2 is
connected to AGND, and the output voltage is available at the
V
REF
terminal. In this configuration, a positive reference voltage
results in a positive output voltage, making single-supply
operation possible. The output from the DAC is voltage at a
constant impedance (the DAC ladder resistance). Therefore, an
op amp is necessary to buffer the output voltage. The reference
input no longer sees a constant input impedance, but one that
varies with code. So, the voltage input should be driven from a
low impedance source.
Rev. 0 | Page 17 of 32
Note that V
IN
is limited to low voltages, because the switches in
the DAC ladder no longer have the same source-drain drive
voltage. As a result, their on resistance differs and this degrades
the integral linearity of the DAC. Also, V
IN
must not go negative
by more than 0.3 V or an internal diode turns on, exceeding the
maximum ratings of the device. In this type of application, the
DAC’s full range of multiplying capability is lost.
POSITIVE OUTPUT VOLTAGE
The output voltage polarity is opposite to the V
REF
polarity for
dc reference voltages. To achieve a positive voltage output, an
applied negative reference to the input of the DAC is preferred
over the output inversion through an inverting amplifier
because of the resistor’s tolerance errors. To generate a negative
reference, the reference can be level-shifted by an op amp such
that the V
OUT
and GND pins of the reference become the virtual
ground and 2.5 V, respectively, as shown in Figure 40.
V
OUT
V
DD
GND
V
IN
I
OUT
2
I
OUT
1
R
FB
V
DD
V
REF
R
2
R
1
0
NOTES:
1. ADDITIONAL PINS OMITTED FOR CLARITY.
2. C1 PHASE COMPENSATION (1pF–2pF) MAY BE REQUIRED
IF A1 IS A HIGH SPEED AMPLIFIER.
Figure 39. Single-Supply Voltage-Switching Mode
V
OUT
= 0V TO +2.5V
V
DD
= +5V
GND
I
OUT
2
I
OUT
1
R
FB
V
DD
V
REF
C
1
GND
V
IN
V
OUT
ADR03
+
5V
–5V
1/2 AD8552
1/2 AD8552
8-/10-/12-BIT
DAC
–2.5V
0
NOTES
1. ADDITIONAL PINS OMITTED FOR CLARITY.
2. C1 PHASE COMPENSATION (1pF–2pF) MAY BE REQUIRED
IF A1 IS A HIGH SPEED AMPLIFIER.
Figure 40. Positive Voltage Output with Minimum Components
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參數(shù)描述 |
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| AD5439YRU-REEL | 制造商:Analog Devices 功能描述:DAC 2-CH R-2R 10-bit 16-Pin TSSOP T/R 制造商:Analog Devices 功能描述:DAC 2CH R-2R 10-BIT 16TSSOP - Tape and Reel |
| AD5439YRU-REEL7 | 制造商:Analog Devices 功能描述:DAC 2-CH R-2R 10-bit 16-Pin TSSOP T/R 制造商:Analog Devices 功能描述:DAC 2CH R-2R 10-BIT 16TSSOP - Tape and Reel |
| AD5439YRUZ | 功能描述:IC DAC DUAL 10BIT MULT 16-TSSOP 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(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)品目錄頁面:1398 (CN2011-ZH PDF) |
| AD5439YRUZ-REEL | 功能描述:IC DAC DUAL 10BIT MULT 16TSSOP 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: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(yīng)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）:* |
| AD5439YRUZ-REEL7 | 功能描述:IC DAC DUAL 10BIT MULT 16TSSOP 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: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(yīng)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）:* |
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