參數(shù)資料
型號(hào)： TDA8757
廠(chǎng)商： NXP Semiconductors N.V.
英文描述： Triple 8-bit ADC 170 Msps
中文描述： 三路8位ADC為170 MSPS
文件頁(yè)數(shù)： 27/37頁(yè)
文件大?。?/td> 895K
代理商： TDA8757
Philips Semiconductors
TDA8757
Triple 8-bit ADC 170 Msps
Preliminary data
Rev. 07 — 28 February 2002
27 of 37
9397 750 09457
Koninklijke Philips Electronics N.V. 2002. All rights reserved.
[1]
[2]
From 25 to 70
°
C, the edge of the clock CKDATA has a shift of 1 phase compared to CKREF.
Effective bits are obtained from a Fast Fourier Transform (FFT) treatment taking 8000 acquisition points per equivalent fundamental
period. The calculation takes into account all harmonics and noise up to half clock frequency (NYQUIST frequency).
Conversion-to-noise ratio: S/N = EB
×
6.02 + 1.76 dB.
Output data acquisition: the output data is available after the maximum sampling delay time t
d(s)
. All the timings are given for a 10 pF
capacitive load.
Pulse relative to the blank level.
The I
2
C-bus timings are given for use of the bus at a frequency of 100 kbit/s (100 kHz). This bus could be used at a frequency of
400 kbit/s (400 kHz).
[3]
[4]
[5]
3W-bus
t
rst
reset time of the chip before
3-wire communication
data set-up time for 3-wire
communication
data hold time for 3-wire
communication
600
ns
t
su
100
ns
t
h
100
ns
I
2
C-bus
[5]
V
IL
V
IH
LOW-level input voltage
HIGH-level input voltage
for SCL and SDA
for SCL and SDA;
V
PU
= 5 V
for SCL and SDA;
V
PU
= 3 V
3
0.3V
DD
V
V
0.7V
DD
f
SCL
t
BUF
clock frequency
time the bus must be free before
new transmission can start
start condition hold time
start condition set-up time
LOW-level clock period
HIGH-level clock period
data set-up time
data hold time
SDA and SCL rise time
SDA and SCL fall time
stop condition set-up time
bus line capacitive loading
0
4.7
100
kHz
μ
s
t
HD;STA
t
SU;STA
t
LOW
t
HIGH
t
SU;DAT
t
HD;DAT
t
r
t
f
t
SU;STO
C
b
4.0
4.7
4.7
4.0
250
0
4.0
1.0
300
400
μ
s
μ
s
μ
s
μ
s
ns
ns
μ
s
ns
μ
s
pF
repeated start
f
SCL
= 100 kHz
f
SCL
= 100 kHz
Table 17: Characteristics
…continued
V
CCA
= 4.75 V to 5.25 V (referenced to AGND); V
CCD
= 4.75 V to 5.25 V (referenced to DGND); V
DDD
= 4.75 V to 5.25 V
(referenced to V
SSD
); V
CCO
= 4.75 V to 5.25 V (referenced to OGND); AGND, DGND, OGND and V
SS
connected together;
T
amb
= 0 to 70
°
C; typical values measured at V
CCA
= V
DDD
= V
CCD
= V
CCO
= 5 V and T
amb
= 25
°
C; unless otherwise
specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
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