參數(shù)資料
型號: AD9736BBC
廠商: Analog Devices Inc
文件頁數(shù): 41/72頁
文件大小: 0K
描述: IC DAC 14BIT 1.2GSPS 160CSPBGA
產(chǎn)品培訓(xùn)模塊: Data Converter Fundamentals
DAC Architectures
標(biāo)準(zhǔn)包裝: 1
位數(shù): 14
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
電壓電源: 模擬和數(shù)字
功率耗散(最大): 550mW
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 160-LFBGA,CSPBGA
供應(yīng)商設(shè)備封裝: 160-CSPBGA(12x12)
包裝: 托盤
輸出數(shù)目和類型: 2 電流,單極
采樣率(每秒): 1.2G
AD9734/AD9735/AD9736
Rev. A | Page 46 of 72
GENERATING EXPECTED SIGNATURES
The following MATLAB code duplicates the internal logic of
the AD973x. To use it, save this code in a file called bist.m.
--- begin bist.m ---
function [ ret1 , ret2] = bist(vec)
ret1 = bist1(vec(1:2:length(vec)-1));
ret2 = bist1(vec(2:2:length(vec)));
function ret = bist1(v)
sum = zeros(1,32);
for i = 1 :length(v)
if v(i) ~= 0
su(1) = ~xor(sum(32) ,bitget(v(i),1));
su(2) = ~xor(sum(1) ,bitget(v(i),2));
su(3) = ~xor(sum(2) ,bitget(v(i),3));
su(4) = ~xor(sum(3) ,bitget(v(i),4));
su(5) = ~xor(sum(4) ,bitget(v(i),5));
su(6) = ~xor(sum(5) ,bitget(v(i),6));
su(7) = ~xor(sum(6) ,bitget(v(i),7));
su(8) = ~xor(sum(7) ,bitget(v(i),8));
su(9) = ~xor(sum(8) ,bitget(v(i),9));
su(10) = ~xor(sum(9) ,bitget(v(i),10));
su(11) = ~xor(sum(10) ,bitget(v(i),11));
su(12) = ~xor(sum(11) ,bitget(v(i),12));
su(13) = ~xor(sum(12) ,bitget(v(i),13));
su(14) = ~xor(sum(13) ,bitget(v(i),14));
su(15) = sum(14); su(16) = sum(15);
su(17) = sum(16); su(18) = sum(17);
su(19) = sum(18); su(20) = sum(19);
su(21) = sum(20); su(22) = sum(21);
su(23) = sum(22); su(24) = sum(23);
su(25) = sum(24); su(26) = sum(25);
su(27) = sum(26); su(28) = sum(27);
su(29) = sum(28); su(30) = sum(29);
su(31) = sum(30); su(32) = sum(31);
sum = su;
end
end % for ret = dec2hex( 2.^[0:31]× sum',8);
--- end bist.m ---
To generate the expected BIST signatures, follow this procedure:
1.
Start MATLAB and type the following at the command
prompt:
t = round(randn(1,100) × 213/8+213) ;
[ b1 b2 ] = bist(t)
The first statement creates a random vector of 14-bit
words, with a length of 100.
2.
Set t equal to any desired vector, or take this random vector
and input it to the AD973x.
3.
Alter the command randn(1,100) to change the vector
length as desired.
4.
Type b1 at the command line to see the calculated
signature for the LVDS BIST, Phase 1.
5.
Type b2 to see the value for LVDS BIST, Phase 2.
The values returned for b1 and b2 each are 32-bit hex values.
They correspond to Reg. 18, Reg. 19, Reg. 20, and Reg. 21,
where b1 is the value read for SEL<1:0> = 0, 0 (see Table 17)
and b2 is the value read for SEL<1:0> = 0, 1.
When the DAC is in 1× mode, the signature at SYNC BIST,
Phase 1 should equal the signature at LVDS BIST, Phase 1. The
same is true for Phase 2.
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