參數(shù)資料
型號: DS1852B-00C+T&R
廠商: Maxim Integrated Products
文件頁數(shù): 18/26頁
文件大?。?/td> 0K
描述: IC MONITOR TXRX OPTICAL 25-BGA
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 2,500
類型: 收發(fā)器
電源電壓: 2.7 V ~ 5.5 V
安裝類型: 表面貼裝
封裝/外殼: 25-TFBGA,CSPBGA
供應(yīng)商設(shè)備封裝: 25-BGA(5x5)
包裝: 帶卷 (TR)
DS1852
25 of 26
begin
bestTrim := trim;
if (Bit > 11) then
Begin
trim := trim - lshft(1,trimBit);
end;
(* The upper 4 bits of bestTrim contains the answer for the course adjustment.*)
(* It is the smallest value that allows full scale trim with the lower 12 bits*)
(* zero out the lower 12 bits of bestTrim *)
trim := land(bestTrim,61440(*F000h*)); (*land() is logical AND function*)
(*Use SAR approach to trim resolution on VAD scale bits 11-0*)
for Bit := 11 downto -1 do (* must go 1 bit too far so that zero is
possible solution *)
begin
if (Bit > 0) then
begin
trim := trim + lshft(1,Bit);
end;
writeTrimValue(trim);
waitForNewConversion;
Dec_out := readVoltage;
delta := Dec_out - Dec_in;
if ( abs(delta) <= abs(bestDelta) ) then
begin
bestTrim := trim;
bestDelta := delta;
end;
if ( delta > 0 ) then
begin
if (Bit > 0) then
Begin
trim := trim - lshft(1,trimBit);
end;
(* bestTrim now contains the trim that gives the lowest delta*)
ProgramTrim(bestTrim);
end;
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