±1V. VDD selects ±1." />
參數(shù)資料
型號(hào): LTC1745IFW#TR
廠商: Linear Technology
文件頁(yè)數(shù): 19/20頁(yè)
文件大?。?/td> 0K
描述: IC ADC SMPL 12BIT 25MSPS 48TSSOP
標(biāo)準(zhǔn)包裝: 1,800
位數(shù): 12
采樣率(每秒): 25M
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 455mW
電壓電源: 單電源
工作溫度: -40°C ~ 85°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 48-TFSOP(0.240",6.10mm 寬)
供應(yīng)商設(shè)備封裝: 48-TSSOP
包裝: 帶卷 (TR)
輸入數(shù)目和類(lèi)型: 2 個(gè)單端,雙極;1 個(gè)差分,雙極
8
LTC1745
1745f
SENSE (Pin 1): Reference Sense Pin. Ground selects
±1V. VDD selects ±1.6V. Greater than 1V and less than
1.6V applied to the SENSE pin selects an input range of
±VSENSE, ±1.6V is the largest valid input range.
VCM (Pin 2): 2.35V Output and Input Common Mode Bias.
Bypass to ground with 4.7
F ceramic chip capacitor.
GND (Pins 3, 6, 9, 12, 13, 16, 19, 21, 36, 37): ADC
Power Ground.
AIN+ (Pin 4): Positive Differential Analog Input.
AIN– (Pin 5): Negative Differential Analog Input.
VDD (Pins 7, 8, 17, 18, 20): 5V Supply. Bypass to GND
with 1
F ceramic chip capacitor.
REFLB (Pin 10): ADC Low Reference. Bypass to Pin 11
with 0.1
F ceramic chip capacitor. Do not connect to
Pin 14.
REFHA (Pin 11): ADC High Reference. Bypass to Pin 10
with 0.1
F ceramic chip capacitor, to Pin 14 with a 4.7F
ceramic capacitor and to ground with 1
F ceramic
capacitor.
REFLA (Pin 14): ADC Low Reference. Bypass to Pin 15
with 0.1
F ceramic chip capacitor, to Pin 11 with a 4.7F
ceramic capacitor and to ground with 1
F ceramic
capacitor.
REFHB (Pin 15): ADC High Reference. Bypass to Pin 14
with 0.1
F ceramic chip capacitor. Do not connect to
Pin 11.
PI FU CTIO S
UU
U
MSBINV (Pin 22): MSB Inversion Control. Low inverts
the MSB, 2’s complement output format. High does not
invert the MSB, offset binary output format.
ENC (Pin 23): Encode Input. The input sample starts on
the positive edge.
ENC (Pin 24): Encode Complement Input. Conversion
starts on the negative edge. Bypass to ground with 0.1
F
ceramic for single-ended encode signal.
OE (Pin 25): Output Enable. Low enables outputs. Logic
high makes outputs Hi-Z.
CLKOUT (Pin 26): Data Valid Output. Latch data on the
rising edge of CLKOUT.
OGND (Pins 27, 38, 47): Output Driver Ground.
NC (Pins 28, 29): Do Not Connect These Pins.
D0-D1 (Pins 30, 31): Digital Outputs. D0 is the LSB.
OVDD (Pins 32, 43): Positive Supply for the Output Driv-
ers. Bypass to ground with 0.1
F ceramic chip capacitor.
D2-D4 (Pins 33 to 35): Digital Outputs.
D5-D8 (Pins 39 to 42): Digital Outputs.
D9-D11 (Pins 44 to 46): Digital Outputs. D11 is the MSB.
OF (Pin 48): Over/Under Flow Output. High when an over
or under flow has occurred.
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