LTC1069-7CS8(1996) 查看數據表（PDF） - Linear Technology
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LTC1069-7CS8 Datasheet PDF : 8 Pages
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LTC1069-7
ELECTRICAL CHARACTERISTICS
fCUTOFF is the filter’s cutoff frequency and is equal to fCLK/25. The fCLK signal level is TTL or CMOS (max clock rise or
fall time ≤ 1µs), RL = 10k, TA = 25°C, unless otherwise specified. All AC gains are measured relative to the passband gain.
PARAMETER
Gain at 5.0fCUTOFF
Gain at fCUTOFF (160kHz)
Phase at 0.5fCUTOFF
Phase at fCUTOFF
Passband Phase Deviation from
Linear Phase (Note 1)
Output DC Offset (Input at GND)
Output Voltage Swing
Power Supply Current
CONDITIONS
VS = 4.75V, fCLK = 500kHz
fTEST = 100kHz, VIN = 0.5VRMS
VS = ±5V, fCLK = 4MHz
fTEST = 160kHz, VIN = 1VRMS
VS = ±5V, fCLK = 2.5MHz
fTEST = 50kHz
VS = ±5V, fCLK = 2.5MHz
fTEST = 100kHz
VS = ±5V, fCLK = 500kHz
VS = ±5V, fCLK = 500kHz
VS = 4.75V, fCLK = 400kHz
VS = ±5V, ISOURCE/ISINK ≤ 1mA, RL = 10k
VS = 4.75V, ISOURCE/ISINK ≤ 1mA, RL = 10k
VS = ±5V, fCLK = 500kHz
VS = 4.75V, fCLK = 400kHz
MIN TYP MAX
– 70 –59 – 55
– 2.1
– 35 – 30.5 – 25
– 240 – 235 – 230
– 3.0
50
25 125
q ±3.5 ±4.0
q
2.6 3.6
18 26
q
29
13 15
q
16.5
UNITS
dB
dB
Deg
Deg
Deg
mV
mV
V
VP-P
mA
mA
mA
mA
The q denotes specifications which apply over the full operating
temperature range.
Note 1: Phase Deviation = 1/2(Phase at 0Hz – Phase at fCUTOFF) – (Phase
at 0Hz – Phase at 0.5fCUTOFF)
Phase at 0Hz = 180° (guaranteed by design)
Example: An LTC1069-7 has Phase at 0.5fCUTOFF = – 30.5° and Phase at
fCUTOFF = – 235°.
Passband Phase Deviation from Linear Phase
= 1/2[180° – (– 235°)] – [(180° – (– 30.5°)] = – 3°
TYPICAL PERFORMANCE CHARACTERISTICS
Passband Gain vs Frequency
1.0
0.5
VS = ±5V
fCLK = 500kHz
0
fC = 20kHz
VIN = 2VRMS
–0.5
– 1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
1 3 5 7 9 11 13 15 17 19 21
FREQUENCY (kHz)
LTC1069-7 • TPC01
Transition Band Gain vs Frequency
10
VS = ±5V
0
fCLK = 500kHz
fC = 20kHz
VIN = 2VRMS
–10
–20
–30
–40
– 50
21 23 25 27 29 31 33 35 37 39 41
FREQUENCY (kHz)
LTC1069-7 • TPC02
Stopband Gain vs Frequency
–40
–42
VS = ±5V
fCLK = 500kHz
–44
fC = 20kHz
VIN = 2VRMS
–46
–48
–50
–52
–54
–56
–58
–60
41 45 49 53 57 61 65 69 73 77 81
FREQUENCY (kHz)
LTC1069-7 • TPC03
3
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