LTC1564IG Просмотр технического описания (PDF) - Linear Technology
Номер в каталоге
Компоненты Описание
производитель
LTC1564IG Datasheet PDF : 12 Pages
| |||
LTC1564
TYPICAL APPLICATIO S
2-Chip Flexible DSP Front End with Amplification,
Antialias Filtering and A/D Conversion
2.2µF
1µF
5V 1µF 5V 1µF
10Ω
+
INPUT
–
3
36
35
9
10
*C1 IS A 1000pF NPO, SURFACE MOUNT DEVICE
PLACE AS CLOSE AS POSSIBLE TO THE LTC1608 INPUT PINS
5V
0.1µF
–5V
0.1µF
4
+
14 3 2
22µF
16
IN
AV
AV
CS/
V+ EN V–
249Ω
LTC1564
1% METAL FILM
OUT
1 249Ω
1% METAL FILM
fC
AGND
15
1
C1*
2
HOLD RST
F
G
4 13 5 6 7 8 9 10 11 12
DIFFERENTIAL
ANALOG INPUT
± 2.5V
FILTER CONTROL
VREF
AVDD
AVDD
LTC1608
REFCOMP
1.75X
7.5k 2.5V
REF
DVDD
DGND
SHDN 33
CONTROL
LOGIC
AND
TIMING
CS 32
CONVST 31
RD 30
BUSY 27
µP
CONTROL
LINES
OVDD 29
5V OR
3V
AIN+
OGND 28
1µF
AIN–
16-BIT
SAMPLING
ADC
B15 TO B0
OUTPUT
BUFFERS
D15 TO D0
16-BIT
PARALLEL
BUS
AGND AGND AGND AGND VSS
5
6
7
8 34
11 TO 26
1564 TA03
1µF
ANTIALIAS FILTER/AMP
ADC –5V
16-Bit Output, Sampling Rate to 500ksps, Analog Bandwidth to 150kHz, Gain to 24dB.
(For More Information, See Linear Technology Magazine, May 2001)
0
–20
–40
–60
–80
–100
–120
–140
0
4096-Point FFT Spectrum
with Low Level Input
25.6
51.2
76.8
FREQUENCY (kHz)
102.4
1564 TA04
Boosting a 100mVRMS Input Signal to Nearly Fill the Input Range of the LTC1608 ADC. Input Frequency of 40kHz,
LTC1608 fSAMPLE = 204.8ksps, LTC1564 is Set for fC = 50kHz and Gain of 16 (F = 0101, G = 1111). Measured THD
is 86dB, HD2 = – 88dB, SNR = 85dB with 100mVRMS Input. Dynamic Range of Approximately 115dB
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
Share Link: 