Datasheet

LTC1069-7
3
10697fa
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Phase Deviation = 1/2(Phase at 0Hz – Phase at f
CUTOFF
) – (Phase
at 0Hz – Phase at 0.5f
CUTOFF
)
Phase at 0Hz = 180° (guaranteed by design)
ELECTRICAL CHARACTERISTICS
The l denotes specifi cations which apply over the full operating
temperature range.
f
CUTOFF
is the fi lter’s cutoff frequency and is equal to f
CLK
/25. The f
CLK
signal level is TTL or CMOS (max clock rise
or fall time ≤1μs), R
L
= 10k, T
A
= 25°C, unless otherwise specifi ed. All AC gains are measured relative to the passband gain.
SYMBOL CONDITIONS MIN TYP MAX UNITS
Gain at 1.5f
CUTOFF
V
S
= ±5V, f
CLK
= 2.5MHz
f
TEST
= 150kHz, V
IN
= 1V
RMS
–19
–16.5
–14
dB
dB
V
S
= 4.75V, f
CLK
= 500kHz
f
TEST
= 30kHz, V
IN
= 0.5V
RMS
–20
–18.1
–17
dB
dB
Gain at 2.0f
CUTOFF
V
S
= ±5V, f
CLK
= 2.5MHz
f
TEST
= 200kHz, V
IN
= 1V
RMS
–55
–43
–38
dB
dB
V
S
= 4.75V, f
CLK
= 500kHz
f
TEST
= 40kHz, V
IN
= 0.5V
RMS
–48
–41
–39
dB
dB
Gain at 5.0f
CUTOFF
V
S
= 4.75V, f
CLK
= 500kHz
f
TEST
= 100kHz, V
IN
= 0.5V
RMS
–70 –59 –55 dB
Gain at f
CUTOFF
(160kHz) V
S
= ±5V, f
CLK
= 4MHz
f
TEST
= 160kHz, V
IN
= 1V
RMS
–2.1 dB
Phase at 0.5f
CUTOFF
V
S
= ±5V, f
CLK
= 2.5MHz
f
TEST
= 50kHz
–35 –30.5 –25 Deg
Phase at f
CUTOFF
V
S
= ±5V, f
CLK
= 2.5MHz
f
TEST
= 100kHz
–240 –235 –230 Deg
Passband Phase Deviation from
Linear Phase (Note 1)
V
S
= ±5V, f
CLK
= 500kHz –3.0 Deg
Output DC Offset (Input at GND) V
S
= ±5V, f
CLK
= 500kHz
V
S
= 4.75V, f
CLK
= 400kHz
50
25
125
mV
mV
Output Voltage Swing V
S
= ±5V, I
SOURCE
/I
SINK
≤ 1mA, R
L
= 10k
V
S
= 4.75V, I
SOURCE
/I
SINK
≤ 1mA, R
L
= 10k
l
l
±3.5
2.6
±4.0
3.6
V
V
P-P
Power Supply Current V
S
= ±5V, f
CLK
= 500kHz
l
18 26
29
mA
mA
V
S
= 4.75V, f
CLK
= 400kHz
l
13 15
16.5
mA
mA
Example: An LTC1069-7 has Phase at 0.5f
CUTOFF
= –30.5° and Phase at
f
CUTOFF
= –235°.
Passband Phase Deviation from Linear Phase
= 1/2[180° – (–235°)] – [(180° – (–30.5°)] = –3°