Datasheet

MAX260/MAX261/MAX262
Microprocessor Programmable
Universal Active Filters
6 _______________________________________________________________________________________
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
-20
-10
10
0
20
30
0.2 0.60.4 0.8 1.0 1.2 1.4
Q ERROR vs. CLOCK FREQUENCY
MAX260
MAX260/61/62 toc01
CLOCK FREQUENCY (MHz)
Q ERROR (%)
MODE 4
±5V
25°C
Q = 8
f
CLK
/f
0
→ N = 0
MODES 2 & 3
MODE 1
5
10
15
20
25
I
DD
vs. POWER SUPPLY VOLTAGE
MAX260/61/62 toc02
V+ TO V- (V)
I
DD
(mA)
5896 7 10 11 12
CLK FREQ = 500KHz
25°C
CONTROL PINS (5V, 0V)
CLOCKS (5V, 0V)
CLOCKS (5V, -5V)
13
15
14
17
16
19
18
20
0.5 1.5 2.5 3.5
I
DD
vs. CLOCK FREQUENCY
MAX260/61/62 toc03
CLOCK FREQUENCY (MHz)
I
DD
(mA)
CLOCK (2.4V, 0.8V)
CLOCK (5V, 0V)
±5V
CONTROL PINS (5V, 0V)
25°C
CLOCK (5V, -5V)
-4
0
4
8
12
16
20
0.5 1.51.0 2.0 2.5 3.0 3.5
Q ERROR vs. CLOCK FREQUENCY
MAX261/MAX262
MAX260/61/62 toc04
CLOCK FREQUENCY (MHz)
Q ERROR (%)
MODE 3
MODE 2
MODES 1, 4
±5V
Q = 8
T
A
= 25°C
→ N = 0
f
CLK
f
0
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0
0.2
1.0 1.5 2.0 2.5 3.0 3.5
F
CLK
/F
0
ERROR vs. CLOCK FREQUENCY
MAX261/MAX262
MAX260/61/62 toc05
CLOCK FREQUENCY (MHz)
F
CLK
/F
0
ERROR (%)
MODES 2, 3
MODES 1, 4
±5V
Q = 8
T
A
= 25°C
f
CLK
f
0
→ N = 0
0
2
1
4
3
7
6
5
8
0.2 1.00.6 1.4 1.8 2.2 2.8 3.0
OUTPUT SIGNAL SWING
vs. CLOCK FREQUENCY
MAX260/61/62 toc06
CLOCK FREQUENCY (MHz)
PEAK TO PEAK, OUTPUT SWING (V)
MAX261/MAX262 ALL MODES
MAX260 MODE 4
±5V
25°C
Q = 8
f
CLK
/f
0
→ N = 0
MAX260 MODES 1, 2, 3
Q = 1 Q = 8 Q = 64
MODE
LP BP HP/AP/N LP BP HP/AP/N LP BP HP/AP/N
1 -84 -90 -84 -80 -82 -85 -72 -73 -85
2 -88 -90 -88 -84 -82 -84 -77 -73 -76
3 -84 -90 -88 -80 -82 -82 -73 -73 -74
MAX261/
MAX262
4 -83 -89 -84 -79 -81 -85 -71 -73 -85
1 -87 -89 -86 -81 -81 -86 -73 -73 -86
2 -89 -88 -85 -83 -80 -82 -75 -72 -74
3 -87 -88 -85 -80 -82 -80 -71 -72 -72
MAX260
4 -87 -88 -86 -81 -81 -86 -71 -72 -86
MEASUREMENT
BANDWIDTH
Q = 1 Q = 8 Q = 64
Wideband -84 -80 -72
3kHz -87 -87 -86
C Message
Weighted
-93 -93 -93
Wideband RMS Noise (db ref. to 2.47V
RMS
, 7V
P-P
) ±5V Supplies
Note 1: f
CLK
= 1MHz for MAX261/MAX262, f
CLK
= 350kHz for MAX260
Note 2: f
CLK
/f
0
ratio programmed at N = 63 (see Table 2)
Note 3: Clock feedthrough is removed with an RC lowpass ar 4f
0
, ie., R = 3.9kΩ,
C = 2000pF for MAX261.
Noise Spectral Distribution
(MAX261, f
CLK
= 1MHz, dB ref. to 2.47V
RMS
,
7V
P-P
)