参数资料
型号: LTC1745IFW#PBF
厂商: Linear Technology
文件页数: 19/20页
文件大小: 0K
描述: IC ADC 12BIT 25MSPS LN 48TSSOP
标准包装: 39
位数: 12
采样率(每秒): 25M
数据接口: 并联
转换器数目: 1
功率耗散(最大): 455mW
电压电源: 单电源
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 48-TFSOP(0.240",6.10mm 宽)
供应商设备封装: 48-TSSOP
包装: 管件
输入数目和类型: 2 个单端,双极;1 个差分,双极
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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