MAX7403 MAXIM [Maxim Integrated Products], MAX7403 Datasheet

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MAX7403

Manufacturer Part Number
MAX7403
Description
8th-Order, Lowpass, Elliptic, Switched-Capacitor Filters
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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Part Number:
MAX7403CSA
Manufacturer:
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0
The MAX7400/MAX7403/MAX7404/MAX7407 8th-order,
lowpass, elliptic, switched-capacitor filters (SCFs) oper-
ate from a single +5V (MAX7400/MAX7403) or +3V
(MAX7404/MAX7407) supply. These devices draw 2mA
of supply current and allow corner frequencies from
1Hz to 10kHz, making them ideal for low-power anti-
aliasing and post-DAC filtering applications. They fea-
ture a shutdown mode that reduces the 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. In addition,
an offset adjustment pin (OS) allows for the adjustment
of the DC output level.
The MAX7400/MAX7404 provide 82dB of stopband
rejection and a sharp rolloff with a transition ratio of 1.5.
The MAX7403/MAX7407 provide a sharper rolloff with a
transition ratio of 1.2, while still delivering 60dB of stop-
band rejection. The fixed response of these devices
simplifies the design task to corner-frequency selection
by setting a clock frequency. The MAX7400/
MAX7403/MAX7404/MAX7407 are available in 8-pin SO
and DIP packages.
19-4764; Rev 2; 6/99
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.
ADC Anti-Aliasing
Post-DAC Filtering
CT2 Base Stations
V
SUPPLY
CLOCK
0.1 F
INPUT
Typical Operating Circuit
IN
CLK
________________________________________________________________ Maxim Integrated Products
General Description
MAX7400
MAX7403
MAX7404
MAX7407
V
GND
DD
SHDN
COM
Speech Processing
Air-Bag Electronics
OUT
OS
Applications
OUTPUT
0.1 F
8th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
Ordering Information continued at end of data sheet.
MAX7400CSA
MAX7400CPA
MAX7400ESA
MAX7400EPA
MAX7400
MAX7403
MAX7404
MAX7407
8th-Order Lowpass Elliptic Filter
Low Noise and Distortion
Clock-Tunable Corner Frequency (1Hz to 10kHz)
100:1 Clock-to-Corner Ratio
Single-Supply Operation
Low Power
Available in 8-Pin SO and DIP Packages
Low Output Offset: ±5mV
TOP VIEW
PART
-82dB THD + Noise (MAX7400)
+5V (MAX7400/MAX7403)
+3V (MAX7404/MAX7407)
2mA (Operating Mode)
0.2µA (Shutdown Mode)
PART
COM
GND
V
DD
IN
FILTER RESPONSE
Elliptic (r = 1.5)
Elliptic (r = 1.2)
Elliptic (r = 1.5)
Elliptic (r = 1.2)
-40°C to +85°C
-40°C to +85°C
1
2
4
TEMP. RANGE
3
0°C to +70°C
0°C to +70°C
Ordering Information
MAX7400
MAX7403
MAX7404
MAX7407
SO/DIP
Pin Configuration
Selector Guide
7
6
5
8
8 SO
8 Plastic DIP
8 SO
8 Plastic DIP
PIN-PACKAGE
CLK
SHDN
OS
OUT
VOLTAGE (V)
OPERATING
Features
+5
+5
+3
+3
1

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MAX7403 Summary of contents

Page 1

... Rev 2; 6/99 General Description The MAX7400/MAX7403/MAX7404/MAX7407 8th-order, lowpass, elliptic, switched-capacitor filters (SCFs) oper- ate from a single +5V (MAX7400/MAX7403) or +3V (MAX7404/MAX7407) supply. These devices draw 2mA of supply current and allow corner frequencies from 1Hz to 10kHz, making them ideal for low-power anti- aliasing and post-DAC filtering applications. They fea- ture a shutdown mode that reduces the supply current to 0.2µ ...

Page 2

... Switched-Capacitor Filters ABSOLUTE MAXIMUM RATINGS V to GND DD MAX7400/MAX7403 ..............................................-0.3V to +6V MAX7404/MAX7407 ..............................................-0.3V to +4V IN, OUT, COM, OS, CLK ............................-0. SHDN........................................................................-0.3V to +6V OUT Short-Circuit Duration...................................................1sec Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied ...

Page 3

... ELECTRICAL CHARACTERISTICS—MAX7400/MAX7403 (continued) = +5V, filter output measured at OUT, 10kΩ || 50pF load to GND at OUT, SHDN = 100kHz unless otherwise noted. Typical values are at T CLK A MIN MAX PARAMETER SYMBOL POWER REQUIREMENTS Supply Voltage V Supply Current I Shutdown Current I SHDN ...

Page 4

Lowpass, Elliptic, Switched-Capacitor Filters ELECTRICAL CHARACTERISTICS—MAX7404/MAX7407 (continued) = +3V, filter output measured at OUT, 10kΩ || 50pF load to GND at OUT, SHDN = 100kHz unless otherwise noted. ...

Page 5

... ELLIPTIC (r = 1.2) FILTER CHARACTERISTICS—MAX7403/MAX7407 (V = +5V for MAX7403 +3V for MAX7407; filter output measured at OUT; 10kΩ 100kHz; T COM OS DD CLK PARAMETER Insertion Gain Relative to DC Gain (Note 5) Note 1: The maximum f is defined as the clock frequency sinusoidal input at 0.2f ...

Page 6

... Lowpass, Elliptic, Switched-Capacitor Filters (V = +5V for MAX7400/MAX7403 +25°C; unless otherwise noted.) A MAX7403/MAX7407 (r = 1.2) FREQUENCY RESPONSE 1kHz -20 -40 -60 -80 -100 -120 INPUT FREQUENCY (kHz) SUPPLY CURRENT vs. SUPPLY VOLTAGE 2.5 NO LOAD 2.4 2.3 2.2 MAX7400 MAX7404 2.1 MAX7403 MAX7407 2.0 1.9 1.8 1.7 1.6 1.5 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) OFFSET VOLTAGE vs ...

Page 7

... MAX7400/MAX7403 +25°C; unless otherwise noted.) A THD PLUS NOISE vs. INPUT SIGNAL AMPLITUDE (MAX7403 LOAD -10 (SEE TABLE A) -20 -30 -40 - -70 -80 - AMPLITUDE (Vp-p) THD PLUS NOISE vs. INPUT SIGNAL AMPLITUDE (MAX7404) 0 -10 -20 -30 -40 -50 -60 -70 -80 - ...

Page 8

... IN Filter Input 3 GND Ground 4 V Positive Supply Input: +5V for MAX7400/MAX7403, +3V for MAX7404/MAX7407 DD 5 OUT Filter Output Offset Adjust Input. To adjust output offset, bias OS externally. Connect OS to COM if no offset adjustment needed. Refer to ...

Page 9

... The transition ratio is defined as the ratio of the stopband frequency to the corner frequency: The MAX7400/MAX7404 have a transition ratio of 1.5 and a typical stopband rejection of 82dB. The MAX7403/MAX7407 have a transition ratio of 1.2 (pro- viding the steepest rolloff) and a typical stopband . At frequencies S rejection of 60dB. ...

Page 10

... C OSC OSC C OSC where for the MAX7400/MAX7403, and for the MAX7404/MAX7407. Since the capacitor value is in picofarads, minimize the stray capacitance at CLK so that it does not affect the internal oscillator frequen- cy. Varying the rate of the internal oscillator adjusts the filter’ ...

Page 11

... For single-supply or dual-supply operation, drive CLK and SHDN from GND (V- in dual-supply operation For a ±2.5V supply, use the MAX7400 or MAX7403; DD for a ±1.5V supply, use MAX7404 or MAX7407. For ±5V dual-supply applications, use the MAX291–MAX297. ...

Page 12

... Switched-Capacitor Filters Ordering Information (continued) PART TEMP. RANGE MAX7403CSA 0°C to +70°C MAX7403CPA 0°C to +70°C MAX7403ESA -40°C to +85°C MAX7403EPA -40°C to +85°C MAX7404CSA 0°C to +70°C MAX7404CPA 0°C to +70°C MAX7404ESA -40°C to +85°C MAX7404EPA -40°C to +85°C MAX7407CSA 0° ...

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