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參數(shù)資料
| 型號(hào)： | LTC2630CSC6-HZ10#TRMPBF |
| 廠商： | Linear Technology |
| 文件頁(yè)數(shù)： | 7/22頁(yè) |
| 文件大小： | 0K |
| 描述： | IC DAC 10BIT R-R SC70-6 |
| 產(chǎn)品培訓(xùn)模塊： | LTC263x 12-, 10-, and 8-Bit VOUT DAC Family |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 設(shè)置時(shí)間： | 3.9µs |
| 位數(shù)： | 10 |
| 數(shù)據(jù)接口： | 串行 |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 電壓電源： | 單電源 |
| 功率耗散（最大）： | 480µW |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 6-TSSOP，SC-88，SOT-363 |
| 供應(yīng)商設(shè)備封裝： | SC-70-6 |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 輸出數(shù)目和類(lèi)型： | 1 電壓，單極 |
| 采樣率（每秒）： | * |
| 產(chǎn)品目錄頁(yè)面： | 1351 (CN2011-ZH PDF) |
| 其它名稱(chēng)： | LTC2630CSC6-HZ10#TRMPBFDKR |
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LTC2630
15
2630ff
The 16-bit data word is ignored for all commands that do
not include a Write operation.
Power-Down Mode
For power-constrained applications, power-down mode
can be used to reduce the supply current whenever the
DACoutputisnotneeded.Wheninpower-down,thebuffer
amplifier, bias circuit, and reference circuit are disabled
and draw essentially zero current. The DAC output is put
intoahigh-impedancestate,andtheoutputpinispassively
pulled to ground through a 200kΩ resistor. Input and DAC
register contents are not disturbed during power-down.
The DAC can be put into power-down mode by using
command 0100. The supply current is reduced to 1.8A
maximum when the DAC is powered down.
Normal operation resumes after executing any command
that includes a DAC update, as shown in Table 1. The DAC
is powered up and its voltage output is updated. Normal
settling is delayed while the bias, reference, and amplifier
circuits are re-enabled. The power-up delay time is 18s
for settling to 12-bits.
Reference Modes
Forapplicationswhereanaccurateexternalreferenceisnot
available, the LTC2630 has a user-selectable, integrated
reference. The LTC2630-LM and LTC2630-LZ provide a
full-scale output of 2.5V. The LTC2630-HM and LTC2630-
HZ provide a full-scale output of 4.096V.
The internal reference can be useful in applications where
the supply voltage is poorly regulated. Internal Reference
mode can be selected by using command 0110, and is
the power-on default.
The DAC can also operate in supply as reference mode
using command 0111. In this mode, VCC supplies the
DAC’sreferencevoltageandthesupplycurrentisreduced.
Voltage Output
The LTC2630’s integrated rail-to-rail amplifier has guar-
anteed load regulation when sourcing or sinking up to
10mA at 5V, and 5mA at 3V.
Load regulation is a measure of the amplifier’s ability to
maintain the rated voltage accuracy over a wide range of
load current. The measured change in output voltage per
change in forced load current is expressed in LSB/mA.
DC output impedance is equivalent to load regulation, and
may be derived from it by simply calculating a change in
units from LSB/mA to ohms. The amplifier’s DC output
impedance is 0.1Ω when driving a load well away from
the rails.
When drawing a load current from either rail, the output
voltage headroom with respect to that rail is limited by
the 50Ω typical channel resistance of the output devices
(e.g., when sinking 1mA, the minimum output voltage is
50Ω 1mA, or 50mV). See the graph “Headroom at Rails
vs. Output Current” in the Typical Performance Charac-
teristics section.
The amplifier is stable driving capacitive loads of up to
500pF.
operation
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