Rainbow Electronics MAX7407 - Manual

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
0.1 µ F
0.1 µ F
CLOCK
SHDN
OUTPUT
V SUPPLY
COM
OS
MAX7400
MAX7403
MAX7404
MAX7407
OS
OUT V DD
1
2
8
7
CLK
SHDN IN
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
MAX7400 CSA
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.