參數(shù)資料
型號(hào): LTC1654IGN
廠商: Linear Technology
文件頁數(shù): 16/16頁
文件大?。?/td> 0K
描述: IC D/A CONV 14BIT R-R DUAL16SSOP
標(biāo)準(zhǔn)包裝: 100
設(shè)置時(shí)間: 3µs
位數(shù): 14
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): 750µW
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-SSOP(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 16-SSOP
包裝: 管件
輸出數(shù)目和類型: 2 電壓,單極;2 電壓,雙極
采樣率(每秒): 900k
9
LTC1654
1654fb
Voltage Output
The LTC1654 comes complete with rail-to-rail voltage
output buffer amplifiers. These amplifiers will swing to
within a few millivolts of either supply rail when unloaded
and to within a 450mV of either supply rail when sinking
or sourcing 5mA.
There are two GAIN configuration modes for the LTC1654:
a) GAIN of 1: (X1/X1/2 tied to REFLO)
VOUT = (VREFHI – VREFLO)(CODE/16384) + VREFLO
b) GAIN of 1/2: (X1/X1/2 tied to VOUT)
VOUT = (1/2)(VREFHI – VREFLO)(CODE/16384) + VREFLO
The LTC 1654 has two SPEED modes: A FAST mode and
a SLOW mode. When operating in the FAST mode, the
output amplifiers will settle in 3
s (typ) to 14 bits on a 4V
output swing. In the SLOW mode, they will settle in 8.5
s.
The total supply current is 930
A in the FAST mode and
540
A in the SLOW mode. The output noise voltage
density at 10kHz is 170nV/
√Hz in SLOW mode and
150nV/
√Hz in FAST mode.
Power Down
Each DAC can also be independently powered down to less
than 5
A/DAC of supply current. The reference pin also
goes into a high impedance state when the DAC is powered
down and the reference current will drop to below 0.1
A.
The amplifiers’ output stage is also three-stated but the
VOUT pins still have the internal gain-setting resistors
connected to them resulting in an effective resistance from
VOUT to REFLO. This resistance is typically 90k when the
X1/X1/2 pin is tied to VOUT and 36k when X1/X1/2 is tied to
REFLO. Because of this resistance, VOUT will go to VREFLO
when the DAC is powered down and VOUT is unloaded.
OPERATIO
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