Datasheet

3
LTC1069-1
ELECTRICAL CHARACTERISTICS
f
CUTOFF
is the filter’s cutoff frequency and is equal to f
CLK
/100. The f
CLK
signal level is TTL or CMOS (clock rise or fall time ≤ 1µs),
V
S
= 3.3V to ±5V, R
L
= 10k, T
A
= 25°C, unless otherwise noted. All AC gains are measured relative to the passband gain.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Gain at 1.50f
CUTOFF
V
S
= ±5V, f
CLK
= 500kHz –58 –53 –50 dB
f
TEST
= 7.5kHz, V
IN
= 1V
RMS
● –59 –49 dB
V
S
= 3.3V, f
CLK
= 200kHz –58 –53 –50 dB
f
TEST
= 3kHz, V
IN
= 0.5V
RMS
● –59 –49 dB
Output DC Offset (Input at AGND) V
S
= ±5V, f
CLK
= 500kHz 30 150 mV
V
S
= 4.75V, f
CLK
= 400kHz 20 mV
V
S
= 3.3 V, f
CLK
= 200kHz 15 100 mV
Output Voltage Swing V
S
= ±5V ● –3.25 ±4.0 3.25 V
V
S
= 4.75V ● –1.50 ±1.7 1.25 V
V
S
= 3.3 V ● –0.70 ±0.9 0.60 V
Power Supply Current V
S
= ±5V f
CLK
= 500kHz ● 3.8 5.5 mA
V
S
= 4.75V f
CLK
= 400kHz ● 2.5 4.5 mA
V
S
= 3.3 Vf
CLK
= 200kHz ● 2.0 3.5 mA
Maximum Clock Frequency V
S
= ±5V 1.2 MHz
V
S
= 4.75V 0.8 MHz
V
S
= 3.3V 0.5 MHz
Input Frequency Range 0f
CLK
/2 MHz
Input Resistance 30 43 70 kΩ
Operating Power Supply Voltage ±1.57 ±5.5 V
The ● denotes specificatons which apply over the full operating
temperature range.
FREQUENCY (kHz)
0.5
GAIN (dB)
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
1.5
2.5
3.0 5.0
1069-1 G01
1.0 2.0
3.5
4.0
4.5
V
S
= ±5V
f
CLK
= 500kHz
f
C
= 5kHz
V
IN
= 2V
RMS
FREQUENCY (kHz)
11 12 13 14 15 16 17
18 19 20 21
GAIN (dB)
–70
–72
–74
–76
–78
–80
–82
–84
–86
–88
–90


1069-1 G03

V
S
= ±5V
f
CLK
= 500kHz
f
C
= 5kHz
V
IN
= 2V
RMS
FREQUENCY (kHz)
5678
91011
GAIN (DB)
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
1069-1 G02
V
S
= ±5V
f
CLK
= 500kHz
f
C
= 5kHz
V
IN
= 2V
RMS
Passband Gain vs Frequency
Transition Band Gain vs
Frequency
Stopband Gain vs Frequency
TYPICAL PERFORMANCE CHARACTERISTICS
UW