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PDF MAX7408 Data sheet ( Hoja de datos )
| Número de pieza | MAX7408 | |
| Descripción | 5th-Order / Lowpass / Elliptic / Switched-Capacitor Filters | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX7408 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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19-1378; Rev 1; 10/98
5th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
General Description
The MAX7408/MAX7411/MAX7412/MAX7415 5th-order,
lowpass, elliptic, switched-capacitor filters (SCFs) oper-
ate from a single +5V (MAX7408/MAX7411) or +3V
(MAX7412/MAX7415) supply. The devices draw only
1.2mA of supply current and allow corner frequencies
from 1Hz to 15kHz, making them ideal for low-power
post-DAC filtering and anti-aliasing applications. They
can be put into a low-power mode, reducing supply
current to 0.2µA.
Two clocking options are available: self-clocking (through
the use of an external capacitor) or external clocking for
tighter cutoff-frequency control. An offset-adjust pin
allows for adjustment of the DC output level.
The MAX7408/MAX7412 deliver 53dB of stopband
rejection and a sharp rolloff with a transition ratio of 1.6.
The MAX7411/MAX7415 achieve a sharper rolloff with a
transition ratio of 1.25 while still providing 37dB of stop-
band rejection. Their fixed response limits the design
task to selecting a clock frequency.
ADC Anti-Aliasing
Post-DAC Filtering
Applications
CT2 Base Stations
Speech Processing
Selector Guide
PART TRANSITION RATIO
MAX7408
MAX7411
MAX7412
MAX7415
r = 1.6
r = 1.25
r = 1.6
r = 1.25
OPERATING
VOLTAGE (V)
+5
+5
+3
+3
Typical Operating Circuit
VSUPPLY
0.1µF
INPUT
CLOCK
VDD SHDN
IN OUT
MAX7408
MAX7411
CLK
MAX7412
MAX7415
COM
OS
GND
OUTPUT
0.1µF
Features
o 5th-Order, Elliptic Lowpass Filters
o Low Noise and Distortion: -80dB THD + Noise
o Clock-Tunable Corner Frequency (1Hz to 15kHz)
o Single-Supply Operation
+5V (MAX7408/MAX7411)
+3V (MAX7412/MAX7415)
o Low Power
1.2mA (operating mode)
0.2µA (shutdown mode)
o Available in 8-Pin µMAX/DIP Packages
o Low Output Offset: ±4mV
PART
MAX7408CPA
MAX7408CUA
MAX7408EPA
MAX7408EUA
MAX7411CPA
MAX7411CUA
MAX7411EPA
MAX7411EUA
MAX7412CPA
MAX7412CUA
MAX7412EPA
MAX7412EUA
MAX7415CPA
MAX7415CUA
MAX7415EPA
MAX7415EUA
Ordering Information
TEMP. RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
Pin Configuration
TOP VIEW
COM 1
IN 2
GND 3
VDD 4
MAX7408
MAX7411
MAX7412
MAX7415
8 CLK
7 SHDN
6 OS
5 OUT
µMAX/DIP
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1 page  
5th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
ELLIPTIC FILTER (r = 1.25) CHARACTERISTICS—MAX7411/MAX7415
(VDD = +5V for MAX7411, VDD = +3V for MAX7415; filter output measured at OUT; 10kΩ || 50pF load to GND at OUT; SHDN = VDD,
VCOM = VOS = VDD / 2; fCLK = 100kHz; TA = TMIN to TMAX; unless otherwise noted. Typical values are at TA = +25°C.) (Note 3)
PARAMETER
Insertion Gain
with DC Gain Error Removed
(Note 4)
fIN = 0.38fC
fIN = 0.68fC
fIN = 0.87fC
fIN = 0.97fC
fIN = fC
fIN = 1.25fC
fIN = 1.43fC
fIN = 3.25fC
CONDITIONS
MIN TYP MAX UNITS
-0.4 -0.2 0.4
-0.4 0.2 0.4
-0.4 -0.2 0.4
-0.4 0.2 0.4
-0.7 -0.2 0.2
dB
-38.5
-34
-37.2
-35
-37.2
-35
Note 1: The maximum fC is defined as the clock frequency fCLK = 100 · fC at which the peak SINAD drops to 68dB with a sinusoidal
input at 0.2fC.
Note 2: DC insertion gain is defined as ∆VOUT / ∆VIN.
Note 3: fOSC (kHz) ≈ 27 · 103 / COSC (COSC in pF).
Note 4: The input frequencies, fIN, are selected at the peaks and troughs of the ideal elliptic frequency responses.
Typical Operating Characteristics
(VDD = +5V for MAX7408/MAX7411, VDD = +3V for MAX7412/MAX7415; fCLK = 100kHz; SHDN = VDD; VCOM = VOS = VDD / 2;
TA = +25°C; unless otherwise noted.)
MAX7408/MAX7412
FREQUENCY RESPONSE
20
fC = 1kHz
0 r = 1.6
MAX7411/MAX7415
FREQUENCY RESPONSE
20
fC = 1kHz
0 r = 1.25
MAX7408/MAX7412
PASSBAND FREQUENCY RESPONSE
0.2
0
-20 -20 -0.2
-40 -40 -0.4
-60 -60 -0.6
-80
-100
-120
0
1234
INPUT FREQUENCY (kHz)
5
-80
-100
-120
0
1234
INPUT FREQUENCY (kHz)
5
-0.8
-1.0 fC = 1kHz
r = 1.6
-1.2
0
204 408 612 816
INPUT FREQUENCY (Hz)
1.02k
_______________________________________________________________________________________ 5
5 Page 
5th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
Chip Information
TRANSISTOR COUNT: 1457
________________________________________________________Package Information
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAX7408.PDF ] | |
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