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MAX7400ESA+T

P1-P3P4-P6P7-P9P10-P12
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 0.2µA.
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.
Applications
ADC Anti-Aliasing Speech Processing
Post-DAC Filtering Air-Bag Electronics
CT2 Base Stations
Features
♦ 8th-Order Lowpass Elliptic Filter
♦ Low Noise and Distortion
-82dB THD + Noise (MAX7400)
♦ Clock-Tunable Corner Frequency (1Hz to 10kHz)
♦ 100:1 Clock-to-Corner Ratio
♦ Single-Supply Operation
+5V (MAX7400/MAX7403)
+3V (MAX7404/MAX7407)
♦ Low Power
2mA (Operating Mode)
0.2µA (Shutdown Mode)
♦ Available in 8-Pin SO and DIP Packages
♦ Low Output Offset: ±5mV
MAX7400/MAX7403/MAX7404/MAX7407
8th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
________________________________________________________________
Maxim Integrated Products
1
V
DD
IN
CLK
OUT
GND
INPUT
0.1µF
0.1µF
CLOCK
SHDN
OUTPUT
V
SUPPLY
COM
OS
MAX7400
MAX7403
MAX7404
MAX7407
OS
OUTV
DD
1
2
8
7
CLK
SHDNIN
GND
COM
SO/DIP
TOP VIEW
3
4
6
5
MAX7400
MAX7403
MAX7404
MAX7407
Typical Operating Circuit
19-4764; Rev 2; 6/99
Ordering Information continued at end of data sheet.
Pin Configuration
Ordering Information
Selector Guide
MAX7407 Elliptic (r = 1.2) +3
PART FILTER RESPONSE
OPERATING
VOLTAGE (V)
MAX7403
MAX7400 Elliptic (r = 1.5) +5
Elliptic (r = 1.2) +5
MAX7404 Elliptic (r = 1.5) +3
PART
MAX7400CSA
MAX7400CPA
MAX7400ESA -40°C to +85°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
8 SO
8 Plastic DIP
8 SO
MAX7400EPA -40°C to +85°C 8 Plastic DIP
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.
MAX7400/MAX7403/MAX7404/MAX7407
8th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—MAX7400/MAX7403
(V
DD
= +5V, filter output measured at OUT, 10kΩ || 50pF load to GND at OUT, SHDN = V
DD
, OS = COM, 0.1µF from COM to GND,
f
CLK
= 100kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at +25°C.)
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. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
DD
to GND
MAX7400/MAX7403 ..............................................-0.3V to +6V
MAX7404/MAX7407 ..............................................-0.3V to +4V
IN, OUT, COM, OS, CLK............................-0.3V to (V
DD
+ 0.3V)
SHDN........................................................................-0.3V to +6V
OUT Short-Circuit Duration...................................................1sec
Continuous Power Dissipation (T
A
= +70°C)
SO (derate 5.88mW/°C above +70°C)..........................471mW
DIP (derate 9.1mW/°C above +70°C)...........................727mW
Operating Temperature Ranges
MAX740_C_A .....................................................0°C to +70°C
MAX740_E_A ..................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C
V
OS
= 0 to (V
DD
- 1V) (Note 3)
(Note 1)
SHDN = GND, V
COM
= 0 to V
DD
V
IN
= V
COM
= V
DD
/ 2
Output, COM internally biased
V
COM
= V
DD
/ 2 (Note 2)
Input, COM externally driven
CONDITIONS
µA±0.1 ±10Input Leakage Current at OS
µA±0.1 ±10Input Leakage Current at COM
pF50 500C
L
Maximum Capacitive Load
at OUT
kΩ10 1R
L
Resistive Output Load Drive
mVp-p10Clock Feedthrough
kΩ75 125R
COM
Input Resistance at COM
V
DD
/ 2
V
DD
/ 2
V
DD
/ 2
- 0.2 + 0.2
V
COM
COM Voltage Range V
V
DD
/ 2
V
DD
/ 2
V
DD
/ 2
- 0.5 + 0.5
100:1f
CLK
/f
C
Clock-to-Corner Ratio
kHz0.001 to 10f
C
Corner Frequency
VV
COM
±0.1V
OS
Input Voltage Range at OS
-82
ppm/°C10Clock-to-Corner Tempco
V0.25 V
DD
- 0.25Output Voltage Range
mV±5 ±25V
OFFSET
Output Offset Voltage
dB-0.1 0.15 0.3
DC Insertion Gain with
Output Offset Removed
UNITSMIN TYP MAXSYMBOLPARAMETER
C
OSC
= 1000pF (Note 4) kHz29 38 48f
OSC
Internal Oscillator Frequency
V
CLK
= 0 or 5V µA±15 ±30I
CLK
Clock Input Current
V
DD
- 0.5V
IH
V
0.5V
IL
Clock Input High
f
IN
= 200Hz, V
IN
= 4Vp-p,
measurement bandwidth = 22kHz
dB
-80
THD+N
Total Harmonic Distortion
plus Noise
MAX7400
MAX7403
V/V1A
OS
OS Voltage Gain to OUT
Clock Input Low V
FILTER CHARACTERISTICS
CLOCK
MAX7400/MAX7403/MAX7404/MAX7407
8th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS—MAX7400/MAX7403 (continued)
(V
DD
= +5V, filter output measured at OUT, 10kΩ || 50pF load to GND at OUT, SHDN = V
DD
, OS = COM, 0.1µF from COM to GND,
f
CLK
= 100kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
ELECTRICAL CHARACTERISTICS—MAX7404/MAX7407
(V
DD
= +3V, filter output measured at OUT, 10kΩ || 50pF load to GND at OUT, SHDN = V
DD
, OS = COM, 0.1µF from COM to GND,
f
CLK
= 100kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
SHUTDOWN
POWER REQUIREMENTS
SHDN Input Leakage Current
±0.1 ±10 µAV
SHDN
= 0 to V
DD
SHDN Input High
V
SDL
0.5
VV
SDH
V
DD
- 0.5
PARAMETER SYMBOL MIN TYP MAX UNITS
Power-Supply Rejection Ratio PSRR 60 dB
Shutdown Current I
SHDN
0.2 1 µA
Supply Voltage V
DD
4.5 5.5 V
Supply Current I
DD
2 3.5 mA
CONDITIONS
Measured at DC
SHDN = GND, CLK driven from 0 to V
DD
Operating mode, no load, IN = OS = COM
FILTER CHARACTERISTICS
Total Harmonic Distortion
plus Noise
PARAMETER SYMBOL MIN TYP MAX UNITS
DC Insertion Gain with Output
Offset Removed
-0.1 0.1 0.3 dB
Output Offset Voltage V
OFFSET
±5 ±25 mV
Output Voltage Range 0.25 V
DD
- 0.25 V
Clock-to-Corner Tempco 10 ppm/°C
THD+N
-77
dB
MAX7407
MAX7404 -79
OS Voltage Gain to OUT A
OS
1 V/V
Input Voltage Range at OS V
OS
V
COM
±0.1 V
Corner Frequency f
C
0.001 to 10 kHz
Clock-to-Corner Ratio f
CLK
/f
C
100:1
V
DD
/ 2
V
DD
/ 2
V
DD
/ 2
- 0.1 + 0.1
VCOM Voltage Range V
COM
Input Resistance at COM R
COM
75 125 kΩ
Clock Feedthrough 10 mVp-p
Resistive Output Load Drive R
L
10 1 kΩ
Maximum Capacitive Load
at OUT
C
L
50 500 pF
Input Leakage Current at COM ±0.1 ±10 µA
Input Leakage Current at OS ±0.1 ±10 µA
CONDITIONS
COM internally biased or externally driven
V
COM
= V
DD
/ 2 (Note 2)
V
IN
= V
COM
= V
DD
/ 2
f
IN
= 200Hz, V
IN
= 2.5Vp-p,
measurement bandwidth = 22kHz
SHDN = GND, V
COM
= 0 to V
DD
(Note 1)
V
OS
= 0 to (V
DD
- 1V) (Note 3)
SHDN Input Low
V
P1-P3P4-P6P7-P9P10-P12

MAX7400ESA+T

Mfr. #:
Buy MAX7400ESA+T
Manufacturer:
Maxim Integrated
Description:
Active Filter 8th-Order Lowpass Elliptic Filter
Lifecycle:
New from this manufacturer.
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