參數(shù)資料
型號(hào): LTC1857CG#TRPBF
廠商: Linear Technology
文件頁(yè)數(shù): 3/20頁(yè)
文件大?。?/td> 0K
描述: IC A/D CONV 8CH 12BIT 28-SSOP
標(biāo)準(zhǔn)包裝: 2,000
系列: SoftSpan™
位數(shù): 12
采樣率(每秒): 100k
數(shù)據(jù)接口: MICROWIRE?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 40mW
電壓電源: 模擬和數(shù)字
工作溫度: 0°C ~ 70°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 28-SSOP(0.209",5.30mm 寬)
供應(yīng)商設(shè)備封裝: 28-SSOP
包裝: 帶卷 (TR)
輸入數(shù)目和類(lèi)型: 8 個(gè)單端,單極;8 個(gè)單端,雙極;4 個(gè)差分,單極;4 個(gè)差分,雙極
LTC1857/LTC1858/LTC1859
11
185789fa
APPLICATIONS INFORMATION
LT1227: 140MHz video current feedback amplier. 10mA
supply current. ±5V to ±15V supplies. Low noise and low
distortion.
LT1468/LT1469: Single and dual 90MHz, 16-bit accurate
op amp. Good AC/DC specs.
LT1677: Single, low noise op amp. Rail-to-rail input and
output. Up to ±15V supplies.
3000pF
1859 F02
AIN
+
AIN
CH0
CH1
MUXOUT+
MUXOUT
ADC+
ADC
Figure 2. Analog Input Filtering
Figure 1. LTC1857/LTC1858/LTC1859 Simplied Equivalent Circuit
LT1792: Single, low noise JFET input op amp, ±5V sup-
plies.
LT1793: Single, low noise JFET input op amp, 10pA bias
current, ±5V supplies.
LT1881/LT1882: Dual and quad, 200pA bias current, rail-
to-rail output op amps. Up to ±15V supplies.
LT1844/LT1885: Dual and quad, 400pA bias current,
rail-to-rail output op amps. Up to ±15V supplies. Faster
response and settling time.
INTERNAL VOLTAGE REFERENCE
The LTC1857/LTC1858/LTC1859 have an on-chip, tem-
perature compensated, curvature corrected, bandgap
reference, which is factory trimmed to 2.50V. The full-scale
range of the LTC1857/LTC1858/LTC1859 is equal to ±5V,
0V to 5V, ±10V or 0V to 10V. The output of the reference is
connected to the input of a gain of 1.6384x buffer through
an 8k resistor (see Figure 3). The input to the buffer or
2.5V
REFERENCE
INTERNAL
CLOCK
1.6384X
4.096V
8k
AGND1
CONTROL
LOGIC
SERIAL I/O
INPUT MUX
AND
RANGE
SELECT
AGND3
AGND2
REFCOMP
VREF
ADC
MUXOUT+
MUXOUT
ADC+
DGND
AVDD
DVDD
MUX ADDRESS AND RANGE
DATA OUT
CONVST
SDI
SCK
OVDD
SDO
1859 BD
12-/14-/16-BIT
SAMPLING ADC
+
COM
CH7
CH1
CH0
BUSY
RD
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