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參數(shù)資料
| 型號(hào)： | LTC1669-1CS5 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類(lèi)： | DAC |
| 英文描述： | 10-Bit Rail-to-Rail Micropower DAC with I2C Interface |
| 中文描述： | SERIAL INPUT LOADING, 30 us SETTLING TIME, 10-BIT DAC, PDSO5 |
| 封裝： | PLASTIC, MO-193, TSOT-23, 5 PIN |
| 文件頁(yè)數(shù)： | 9/12頁(yè) |
| 文件大?。?/td> | 193K |
| 代理商： | LTC1669-1CS5 |
9
LTC1669
1669f
APPLICATIO
S I
N
FOR
ATIO
U
SYNC Address/Quick Command
In addition to the slave address, the LTC1669 has an
address that can be shared by other devices so that they
may be updated synchronously. The address is called to
the SYNC address and uses the quick command protocol.
The SYNC Address is 1111 110
W
U
Ack
Stop
Start
1111 110
SY/CLR
1
1
7
1
1669 TA05
1
SYNC Address
SY/CLR
1
Update output latches on rising edge of SCL during
Acknowledge of SYNC Address
Clear all internal latches on rising edge of SCL during
Acknowledge of SYNC Address
0
The SY/CLR bit set high only has meaning when the “SY”
bit of the command byte was previously set HIGH. On the
otherhand, the SY/CLR bit set LOW will always clear the
part, independent of the state of the “SY” bit in the
command byte.
Voltage Output
The output amplifier contained in the LTC1669 can source
or sink up to 5mA. The output stage swings to within a few
millivolts of either supply rail when unloaded and has an
equivalent output resistance of 85
when driving a load to
the rails. The output amplifier is stable driving capacitive
loads up to 1000pF.
A small resistor placed in series with the output can be
used to achieve stability for any load capacitance greater
than 1000pF. For example, a 0.1
μ
F load can be driven by
the LTC1669 if a 110
series resistance is used. The phase
margin of the resulting circuit is 45
°
and increases mono-
tonically from this point if larger values of resistance, ca-
pacitance or both are substituted for the values given.
Rail-to-Rail Output Considerations
As in any rail-to-rail device, the output is limited to
voltages within the supply range.
If the DAC offset is negative, the output for the lowest
codes limits at 0V as shown in Figure 1b.
Similarly, limiting can occur near full scale when V
CC
is
used as the reference. If V
REF
= V
CC
and the DAC full-scale
error (FSE) is positive, the output for the highest codes
limits at V
CC
as shown in Figure 1c. No full-scale limiting
can occur if the internal reference is used.
Offset and linearity are defined and tested over the region
of the DAC transfer function where no output limiting can
occur.
Internal Reference
In applications where a predictable output is required that
is independent of supply voltage, the LTC1669 has a user-
selectable internal reference. Selecting the internal refer-
ence will set the full-scale output voltage to 2.5V. This can
be useful in applications where the supply voltage is
poorly regulated.
Using the LT
1460 Micropower Series Reference as a
Power Supply for the LTC1669
In applications where the advantages of using the internal
reference are required but the full-scale range needs to be
greater than 2.5V, an external series reference can be
used. The LT1460 is ideal for use as a power supply for the
LTC1669 and can provide 3V, 3.3V and 5V full-scale
output voltage ranges. The LT1460 provides accuracy,
noise immunity and extended supply range to the LTC1669
when the LTC1669 is operated ratiometric to V
CC
. Since
both parts are available in SOT-23 packages, the PC board
space for this application is extremely small. See Figure 2.
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| LTC1669-1CS5#TR | 功能描述:IC DAC 10BIT V-OUT I2C TSOT23-5 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:Data Converter Fundamentals DAC Architectures 設(shè)計(jì)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(shí)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(lèi)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(lèi)型:1 電流，單極；1 電流，雙極 采樣率（每秒）:2.7M |
| LTC1669-1CS5#TRM | 功能描述:IC DAC 10BIT R-R I2C TSOT23-5 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:Data Converter Fundamentals DAC Architectures 設(shè)計(jì)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(shí)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(lèi)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(lèi)型:1 電流，單極；1 電流，雙極 采樣率（每秒）:2.7M |
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| LTC1669-8CMS8 | 功能描述:IC DAC 10-BIT V-OUT I2C 8-MSOP 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:Data Converter Fundamentals DAC Architectures 設(shè)計(jì)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(shí)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(lèi)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(lèi)型:1 電流，單極；1 電流，雙極 采樣率（每秒）:2.7M |
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