LTC1264 데이터 시트보기 (PDF) - Linear Technology
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LTC1264 Datasheet PDF : 16 Pages
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LTC1264
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Complete Filter) VS = ±5V, fCLK = 1MHz, all sides mode 1, fO = 50kHz,
Q = 5, unless otherwise noted.
PARAMETER
DC Offset Voltage (Note 3)
Clock Feedthrough
Maximum Clock Frequency
Power Supply Current
CONDITIONS
VOS1 (DC Offset of Input Inverter)
VOS2 (DC Offset of First Integrator)
VOS3 (DC Offset of Second Integrator)
VS = ±7.5V (fCLK is a Square Wave)
VS = ±5V (fCLK is a Square Wave)
VS = ±2.375V (fCLK is a Square Wave)
VS = ±7.5V, TA = 25°C
VS = ±5V
MIN
TYP
MAX
●
± 20
●
± 45
●
± 45
160
120
90
6
9
●
14
23
26
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Please refer to Typical Maximum Q vs Clock Frequency graphs.
Note 3: Calculations of output DC offsets of one 2nd order section. Also
see Block Diagram.
Note 4: The center frequency fO, error is calculated as:
fO(measured) – fO(ideal) • 100
fO (ideal)
UNITS
mV
mV
mV
µVRMS
µVRMS
µVRMS
MHz
mA
mA
MODE
1
1b
2
3
VOSN
PINS 2, 11, 14, 23
VOS1[(1Q) + 1 ||HOLP ||] – VOS3/Q
VOS1[(1/Q) + 1 + R2/R1] – VOS3/Q
[VOS1(1 + R2/R1 + R2/R3 + R2/R4) – VOS3(R2/R3)]
• [R4/(R2 + R4)] + VOS2[R2/(R2 + R4)]
VOS2
VOSBP
PINS 3, 10, 15, 22
VOS3
VOS3
VOS3
VOS3
VOSLP
PINS 4, 9, 16, 21
VOSN – VOS2
≈(VOSN – VOS2)(1 + R5/R6)
VOSN – VOS2
VOS1[1 + R4/R1 + R4/R2 + R4/R3] – VOS2(R4/R2)
– VOS3(R4/R3)
TYPICAL PERFOR A CE CHARACTERISTICS
Typical Maximum Q
vs Clock Frequency
26
24
A
22
20
18
16
B
14
12
10
8
6
4
VS = ±7.5V
TA ≤ 85°C
A. MODES 1, 1b
B. MODES 3, 3a
2
0
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
CLOCK FREQUENCY (MHz)
1264 G01
Typical Maximum Q
vs Clock Frequency
26
24
A
22
VS = ±5V
TA ≤ 85°C
20
18
16
B
14
A. MODES 1, 1b
B. MODES 3, 3a
12
10
8
6
4
2
0
1.0 1.5 2.0 2.5 3.0 3.5 4.0
CLOCK FREQUENCY (MHz)
1264 G02
Typical Maximum Q
vs Clock Frequency
20
A
18
16
14
12
VS = SINGLE 5V
TA ≤ 85°C
A. MODES 1, 1b
B. MODES 3, 3a
10
B
8
6
4
2
0
1.0 1.2 1.4 1.6 1.8 2.0
CLOCK FREQUENCY (MHz)
1264 G03
1264fb
3
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