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參數(shù)資料
| 型號： | AD5432YRM |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | 8-/10-/12-Bit High Bandwidth Multiplying DACs with Serial Interface |
| 中文描述： | SERIAL INPUT LOADING, 0.09 us SETTLING TIME, 10-BIT DAC, PDSO10 |
| 封裝： | 3 X 5 MM, MSOP-10 |
| 文件頁數(shù)： | 18/32頁 |
| 文件大?。?/td> | 860K |
| 代理商： | AD5432YRM |
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AD5429/AD5439/AD5449
ADDING GAIN
In applications in which the output voltage is required to be
greater than V
IN
, gain can be added with an additional external
amplifier, or it can be achieved in a single stage. Be sure to take
into consideration the effect of temperature coefficients of the
thin film resistors of the DAC. Simply placing a resistor in series
with the R
FB
resistor causes mismatches in the temperature
coefficients, resulting in larger gain temperature coefficient
errors. Instead, the circuit of Figure 41 is a recommended
method of increasing the gain of the circuit. R
1
, R
2
, and R
3
should all have similar temperature coefficients, but they need
not match the temperature coefficients of the DAC. This
approach is recommended in circuits in which gains of > 1
are required.
Rev. 0 | Page 18 of 32
DIVIDER OR PROGRAMMABLE GAIN ELEMENT
Current-steering DACs are very flexible and lend themselves to
many different applications. If this type of DAC is connected as
the feedback element of an op amp, and R
FB
is used as the input
resistor, as shown in Figure 42, then the output voltage is
inversely proportional to the digital input fraction D. For
D
= 1 2
n
the output voltage is
(
IN
IN
OUT
V
D
V
V
/
/
)
n
=
=
2
1
As D is reduced, the output voltage increases. For small values
of the digital fraction D, it is important to ensure that the
amplifier does not saturate and also that the required accuracy
is met. For example, an 8-bit DAC driven with the binary code
0 × 10 (00010000)—that is, 16 decimal—in the circuit of
Figure 42 should cause the output voltage to be 16 × V
IN
.
However, if the DAC has a linearity specification of ±0.5 LSB,
then D can, in fact, have a weight in the range 15.5/256 to
16.5/256, so that the possible output voltage is in the range
15.5 V
IN
to 16.5 V
IN
with an error of +3%, even though the DAC
itself has a maximum error of 0.2%.
DAC leakage current is also a potential error source in divider
circuits. The leakage current must be counterbalanced by an
opposite current supplied from the op amp through the DAC.
Because only a fraction D of the current into the V
REF
terminal
is routed to the I
OUT
1 terminal, the output voltage has to change
as follows:
Output Error Voltage Due to DAC Leakage = (Leakage × R)/D
where R is the DAC resistance at the V
REF
terminal. For a DAC
leakage current of 10 nA, R = 10 k and a gain (that is, 1/D) of
16, the error voltage is 1.6 mV.
V
DD
R
FB
I
OUT
1
I
OUT
2
C1
GND
V
DD
V
REF
NOTES:
1. ADDITIONAL PINS OMITTED FOR CLARITY.
2. C1 PHASE COMPENSATION (1pF TO 2pF) MAY BE REQUIRED
IF A1 IS A HIGH SPEED AMPLIFIER.
8-/10-/12-BIT
DAC
V
IN
R2
R3
R2
V
OUT
R1 =
R2R3
R2 + R3
GAIN =R2R2
0
Figure 41. Increasing Gain of Current Output DAC
V
IN
NOTE:
1. ADDITIONAL PINS OMITTED FOR CLARITY.
V
REF
V
DD
V
DD
R
FB
I
OUT
1
I
OUT
2
GND
V
OUT
0
Figure 42. Current-Steering DAC Used as a Divider
or Programmable Gain Element
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD5432YRM-REEL | 制造商:Analog Devices 功能描述:DAC 1-CH R-2R 10-bit 10-Pin MSOP T/R 制造商:Analog Devices 功能描述:DAC 1CH R-2R 10-BIT 10MSOP - Tape and Reel 制造商:Rochester Electronics LLC 功能描述:10-IOUT DAC WITH SERIAL ITF I.C. - Tape and Reel |
| AD5432YRM-REEL7 | 功能描述:IC DAC 10BIT MULTIPLYING 10-MSOP RoHS:否 類別: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:2,400 系列:- 設(shè)置時間:- 位數(shù):18 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:3 電壓電源:模擬和數(shù)字 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:36-TFBGA 供應(yīng)商設(shè)備封裝:36-TFBGA 包裝:帶卷 (TR) 輸出數(shù)目和類型:* 采樣率（每秒）:* |
| AD5432YRMZ | 功能描述:IC DAC 10BIT MULTIPLYING 10-MSOP 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) |
| AD5432YRMZ-REEL | 功能描述:IC DAC 10BIT MULTIPLYING 10-MSOP 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 設(shè)計資源:Unipolar, Precision DC Digital-to-Analog Conversion using AD5450/1/2/3 8-14-Bit DACs (CN0052) Precision, Bipolar, Configuration for AD5450/1/2/3 8-14bit Multiplying DACs (CN0053) AC Signal Processing Using AD5450/1/2/3 Current Output DACs (CN0054) Programmable Gain Element Using AD5450/1/2/3 Current Output DAC Family (CN0055) Single Supply Low Noise LED Current Source Driver Using a Current Output DAC in the Reverse Mode (CN0139) 標(biāo)準(zhǔn)包裝:10,000 系列:- 設(shè)置時間:- 位數(shù):12 數(shù)據(jù)接口:DSP，MICROWIRE?，QSPI?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 電壓電源:單電源 功率耗散（最大）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 薄型，TSOT-23-8 供應(yīng)商設(shè)備封裝:TSOT-23-8 包裝:帶卷 (TR) 輸出數(shù)目和類型:1 電流，單極；1 電流，雙極 采樣率（每秒）:2.7M |
| AD5432YRMZ-REEL7 | 功能描述:IC DAC 10BIT MULTIPLYING 10-MSOP 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(biāo)準(zhǔn)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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