VDD
參數(shù)資料
型號: XE8801AMI027LF
廠商: Semtech
文件頁數(shù): 17/135頁
文件大?。?/td> 0K
描述: IC DAS 16BIT FLASH 8K MTP 44LQFP
標(biāo)準(zhǔn)包裝: 800
系列: XE880x
應(yīng)用: 感測機(jī)
核心處理器: Coolrisc816?
程序存儲(chǔ)器類型: 閃存(22 kB)
控制器系列: XE8000
RAM 容量: 512 x 8
接口: UART,USRT
輸入/輸出數(shù): 24
電源電壓: 2.4 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 44-VFQFN 裸露焊盤
包裝: 托盤
供應(yīng)商設(shè)備封裝: 44-MLPQ(7x7)
產(chǎn)品目錄頁面: 585 (CN2011-ZH PDF)
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
Semtech 2005
www.semtech.com
16-28
XE8801A – SX8801R
Supply
ADC
PGA1
PGA2
PGA3
TOTAL
Unit
VDD = 5V
250
165
130
175
720
A
VDD = 3V
190
150
120
160
620
A
Table 16-28 Typical quiescent current distributions in acquisition chain (n = 16 bits, fS = 500kHz)
-20
-15
-10
-5
0
5
10
15
0
500
1000
1500
2000
2500
3000
3500
Frequency - fRC [kHz]
R
e
la
ti
ve
Q
u
iescent
C
u
rr
e
nt
C
h
ange
IQ
/
I
Q,
2
M
H
z[%
]
500
550
600
650
700
750
800
850
0
500
1000
1500
2000
2500
3000
3500
Frequency - fRC [kHz]
Q
u
ie
s
c
e
n
tC
u
rr
e
n
t-
IQ
[
A]
(a)
(b)
Figure 16-24 (a) Absolute and (b) relative change in quiescent curent consumption vs. RC oscillator
frequency (all PGAs active, VDD = 5V)
16.8.7
Power Supply Rejection Ratio
Figure 16-25 shows power supply rejection ratio (PSRR) at 3V and 5V supply voltage, and for various PGA gains.
PSRR is defined as the ratio (in dB) of voltage supply change (in V) to the change in the converter output (in V).
PSRR depends on both PGA gain and supply voltage VDD.
60
65
70
75
80
85
90
95
100
105
1
5
10
20
100
PGA Gain [V/V]
P
S
RR
[
d
B
]
VDD=3V
VDD=5V
Figure 16-25 Power supply rejection ratio (PSRR)
Not
Recommended
for
New
Designs
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