參數(shù)資料
型號(hào)： TLV320AIC28RGZR
廠商： TEXAS INSTRUMENTS INC
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQCC48
封裝： 7 X 7 MM, PLASTIC, QFN-48
文件頁數(shù)： 66/85頁
文件大小： 1053K
代理商： TLV320AIC28RGZR
TLV320AIC28
SLAS418B FEBRUARY 2004 REVISED MAY 2005
www.ti.com
69
CONVERSION TIME CALCULATIONS FOR THE AIC28
Auxiliary Measurement Operation
The time needed to make temperature, auxiliary, or battery measurements is given by:
t
+ N
AVG
N
BITS )
1
8MHz
conv
) n
1 )
n
2 )
1
t
OSC )
15
t
OSC )
n
3
t
OSC
where:
n1 = 6 ; if conv = 8 MHz
7 ; if
conv ≠ 8 MHz
n2 = 24 ; if measurement is for TEMP1 case
12 ; if measurement is for other than TEMP1 case
400 ns; if measurement is for the external/internal resistance using AUX1/AUX2
n3 = 0 ; if external reference mode is selected
3 ; if tREF = 0 s or reference is programmed for power up all the time.
1 + tREF /125 ns; if tREF ≠ 0 s and reference needs to power down between conversions.
tREF is the reference power up delay time.
Sample,Conversion &
Averaging for
BAT1 Input
Waiting for Host to
Write into REG00
of PAGE01
REG00 of
PAGE01
Is Updated
for
Mode
Reading
BAT1Data
Register
Waiting for Host to
Write into REG00
of PAGE01
(PAGE01H,REG01H
[D15D14 = 01])
DAV
SS DEACTIVATED
Wait for Reference Power-Up Delay in Case
of Internal Ref Mode if Applicable
BAT1 Scan
The time needed for continuous autoscan mode is given by:
t
+ N
INP
N
AVG
N
BITS )
1
8MHz
conv
) n
1 )
12
) 1
t
OSC )
8
t
OSC
) n
2
t
OSC )
t
DEL )
n
3 )
t
OSC )
n
4
t
OSC
where:
NINP = 1; if autoscan is selected for only one input AUX1, AUX2, TEMP1 or TEMP2
= 2; if autoscan is selected for two inputs AUX1AUX2, AUX1TEMP1, AUX1TEMP2 etc
= 3; if autoscan is selected for three inputs AUX1AUX2TEMP1 or AUX1AUX2TEMP2
n1 = 6 ; if fconv = 8 MHz
7 ; if fconv p 8 MHz
n2 = 12 ; if one of the input selected is TEMP1
0 ; if measurement is for other than TEMP1
n3 = 0 ; if external reference mode is selected or tDEL = 0.
3 ; if tREF = 0 ms or reference is programmed for power up all the times.
1 + tREF/125 ns ; if tREF p 0us and reference needs to power down between conversions.
tREF is the reference power up delay time.
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