參數(shù)資料
型號(hào)： ADS62P43IRGCTG4
廠商： Texas Instruments
文件頁(yè)數(shù)： 53/78頁(yè)
文件大?。?/td> 0K
描述： IC ADC 14BIT SRL/PAR 80M 64VQFN
產(chǎn)品培訓(xùn)模塊： Data Converter Basics
標(biāo)準(zhǔn)包裝： 250
位數(shù)： 14
采樣率（每秒）： 80M
數(shù)據(jù)接口： 串行，并聯(lián)
轉(zhuǎn)換器數(shù)目： 2
電壓電源： 模擬和數(shù)字
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 64-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 64-VQFN 裸露焊盤（9x9）
包裝： 帶卷 (TR)
輸入數(shù)目和類型： 2 個(gè)差分，單極
CLKOUTP
CLKOUTM
DA0P
DA0M
DA2P
DA2M
OutputClock
DataBitsD0,D1
DataBitsD2,D3
Pins
DA12P
DA12M
DataBitsD12,D13
14-BitChannel-A
Data
LVDSBuffers
DB0P
DB0M
DB2P
DB2M
DataBitsD0,D1
DataBitsD2,D3
DB12P
DB12M
DataBitsD12,D13
14-BitChannel-B
Data
B0288-01
SLAS561C
– JULY 2007 – REVISED FEBRUARY 2012
CMOS Mode Power Dissipation
With CMOS outputs, the DRVDD current scales with the sampling frequency and the load capacitance on every
output pin. The maximum DRVDD current occurs when each output bit toggles between 0 and 1 every clock
cycle. In actual applications, this condition is unlikely to occur. The actual DRVDD current would be determined
by the average number of output bits switching, which is a function of the sampling frequency and the nature of
the analog input signal.
Digital current due to CMOS output switching = CL × DRVDD × (N × FAVG),
where CL = load capacitance, N × FAVG = average number of output bits switching.
Figure 81 shows the current with various load capacitances across sampling frequencies at 2 MHz analog input
frequency.
DDR LVDS Interface
The LVDS interface works only with 3.3-V DRVDD supply. In this mode, the 11 data bits of each channel and a
common output clock are available as LVDS (Low Voltage Differential Signal) levels. Two successive data bits
are multiplexed and output on each LVDS differential pair every clock cycle (DDR
– Double Data Rate,
Figure 95. DDR LVDS Outputs
Odd data bits D1, D3, D5, D7, D9 are output at the falling edge of CLKOUTP and even data bits D0, D2, D4, D6,
D8, D10 are output at the rising edge of CLKOUTP. Both the rising and falling edges of CLKOUTP have to be
used to capture all the data bits.
Copyright
2007–2012, Texas Instruments Incorporated
57
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