參數(shù)資料
型號: LTC1858CG#TRPBF
廠商: Linear Technology
文件頁數(shù): 18/20頁
文件大?。?/td> 0K
描述: IC A/D CONV 8CH 14BIT 28-SSOP
標(biāo)準(zhǔn)包裝: 2,000
系列: SoftSpan™
位數(shù): 14
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)目和類型: 8 個單端,單極;8 個單端,雙極;4 個差分,單極;4 個差分,雙極
LTC1857/LTC1858/LTC1859
7
185789fa
TYPICAL PERFORMANCE CHARACTERISTICS
LTC1859 Power Supply
Feedthrough vs Ripple Frequency
Supply Current vs Supply Voltage
Supply Current vs Temperature
COM (Pin 1): Common Input. This is the reference point
for all single-ended inputs. It must be free of noise and is
usually connected to the analog ground plane.
CH0 (Pin 2): Analog MUX Input.
CH1 (Pin 3): Analog MUX Input.
CH2 (Pin 4): Analog MUX Input.
CH3 (Pin 5): Analog MUX Input.
CH4 (Pin 6): Analog MUX Input.
CH5 (Pin 7): Analog MUX Input.
CH6 (Pin 8): Analog MUX Input.
CH7 (Pin 9): Analog MUX Input.
MUXOUT+ (Pin10):PositiveMUXOutput.Outputoftheana-
log multiplexer. Connect to ADC+ for normal operation.
MUXOUT(Pin11):NegativeMUXOutput.Outputoftheana-
log multiplexer. Connect to ADCfor normal operation.
ADC+ (Pin 12): Positive Analog Input to the Analog-to-
Digital Converter.
ADC(Pin 13): Negative Analog Input to the Analog-to-
Digital Converter.
AGND1 (Pin 14): Analog Ground.
VREF (Pin 15): 2.5V Reference Output. Bypass to analog
ground with a 1μF tantalum capacitor.
REFCOMP (Pin 16): Reference Buffer Output. Bypass to
analog ground with a 10μF tantalum and a 0.1μF ceramic
capacitor. Nominal output voltage is 4.096V.
AGND2 (Pin 17): Analog Ground.
AGND3 (Pin 18): Analog Ground. This is the substrate
connection.
AVDD (Pin 19): 5V Analog Supply. Bypass to analog ground
with a 0.1μF ceramic and a 10μF tantalum capacitor.
DVDD (Pin 20): 5V Digital Supply. Bypass to digital ground
with a 0.1μF ceramic and a 10μF tantalum capacitor.
OVDD (Pin 21): Positive Supply for the Digital Output
Buffers (3V to 5V). Bypass to digital ground with a 0.1μF
ceramic and a 10μF tantalum capacitor.
BUSY (Pin 22): Output shows converter status. It is low
when a conversion is in progress.
SDO (Pin 23): Serial Data Output.
PIN FUNCTIONS
RIPPLE FREQUENCY (Hz)
–60
POWER
SUPPLY
FEEDTHROUGH
(dB)
–40
–20
–10
100
10k
100k
1M
1859 G10
–80
1k
–30
–50
–70
fSAMPLE = 100kHz
VRIPPLE = 60mV
SUPPLY VOLTAGE (V)
4.5
SUPPLY
CURRENT
(mA)
8.0
8.5
5.5
1859 G11
7.5
7.0
4.75
5
5.25
9.0
fSAMPLE = 100kHz
TEMPERATURE (°C)
–50
7.0
POSITIVE
SUPPLY
CURRENT
(mA)
7.5
8.0
8.5
9.0
–25
0
25
50
1859 G12
75
100
fSAMPLE = 100kHz
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