LTC1564 LINER [Linear Technology], LTC1564 Datasheet - Page 11

• Manufacturer Part Number: LTC1564
• Description: 10kHz to 150kHz Digitally Controlled Antialiasing Filter and 4-Bit P.G.A
• Manufacturer: LINER [Linear Technology]

INPUT
TYPICAL APPLICATIO S
–
+
16
*C1 IS A 1000pF NPO, SURFACE MOUNT DEVICE
PLACE AS CLOSE AS POSSIBLE TO THE LTC1608 INPUT PINS
IN
HOLD RST
CS/
Boosting a 100mV
LTC1608 f
A
4
V
A
V
13
ANTIALIAS FILTER/AMP
is 86dB, HD
FILTER CONTROL
5 6 7 8
SAMPLE
F
0.1 F
f
C
16-Bit Output, Sampling Rate to 500ksps, Analog Bandwidth to 150kHz, Gain to 24dB.
LTC1564
5V
V
= 204.8ksps, LTC1564 is Set for f
+
14
RMS
2
9 10 11 12
EN V
= – 88dB, SNR = 85dB with 100mV
3
G
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.
(For More Information, See Linear Technology Magazine, May 2001)
AGND
–5V
Input Signal to Nearly Fill the Input Range of the LTC1608 ADC. Input Frequency of 40kHz,
OUT
–
2
0.1 F
U
1
15
1% METAL FILM
1% METAL FILM
2-Chip Flexible DSP Front End with Amplification,
249
249
–100
–120
–140
–20
–40
–60
–80
Antialias Filtering and A/D Conversion
0
ANALOG INPUT
DIFFERENTIAL
0
22 F
2.5V
4096-Point FFT Spectrum
C1*
+
25.6
with Low Level Input
4
1
2
FREQUENCY (kHz)
C
REFCOMP
A
A
= 50kHz and Gain of 16 (F = 0101, G = 1111). Measured THD
IN
IN
–
+
51.2
RMS
2.2 F
3
V
REF
AGND
Input. Dynamic Range of Approximately 115dB
+
–
1.75X
5
SAMPLING
76.8
16-BIT
AGND
1 F
ADC
6
1564 TA04
AV
DD
36
7.5k
AGND
102.4
10
7
LTC1608
B15 TO B0
AV
2.5V
REF
5V
ADC
AGND
DD
35
1 F
8
–5V
V
SS
34
5V
BUFFERS
CONTROL
OUTPUT
DV
9
TIMING
LOGIC
AND
1 F
DD
1 F
10
DGND
D15 TO D0
CONVST
OGND
SHDN
BUSY
OV
1564 TA03
RD
CS
DD
11 TO 26
LTC1564
33
32
31
30
27
29
28
16-BIT
PARALLEL
BUS
CONTROL
LINES
11
P
1 F
5V OR
3V