Datasheet > LTC1069-7C

LTC1069-7C

更新时间： 2022-11-25 12:22:29

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
8页	230K
描述
Linear Phase 8th Order Lowpass Filter

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数据手册

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LTC1069-7C 数据手册

LTC1069-7

ELECTRICAL CHARACTERISTICS

f_CUTOFFis the filter’s cutoff frequency and is equal to f_CLK/25. The f_CLKsignal level is TTL or CMOS (max clock rise or

fall time ≤1µs), R_L= 10k, T_A= 25°C, unless otherwise specified. All AC gains are measured relative to the passband gain.

PARAMETER

Gain at 5.0f

CONDITIONS

V = 4.75V, f = 500kHz

CLK

MIN

TYP

MAX

UNITS

–70

–59

–55

CUTOFF

= 100kHz, V = 0.5V

TEST

IN RMS

Gain at f

(160kHz)

V = ±5V, f = 4MHz

CLK

–2.1

Deg

CUTOFF

= 160kHz, V = 1V

TEST

IN RMS

Phase at 0.5f

V = ±5V, f

= 2.5MHz

= 500kHz

–35 –30.5

–25

CUTOFF

CLK

= 50kHz

TEST

Phase at f

V = ±5V, f

–240 –235 –230

CUTOFF

= 100kHz

TEST

Passband Phase Deviation from

Linear Phase (Note 1)

V = ±5V, f

–3.0

CLK

Output DC Offset (Input at GND)

V = ±5V, f

CLK

V = 4.75V, f

= 400kHz

125

CLK

Output Voltage Swing

V = ±5V, I

V = 4.75V, I

≤ 1mA, R = 10k

●

±3.5

2.6

±4.0

3.6

P-P

SOURCE SINK

≤ 1mA, R = 10k

SOURCE SINK

Power Supply Current

V = ±5V, f

= 500kHz

CLK

●

V = 4.75V, f

= 400kHz

CLK

16.5

Example: An LTC1069-7 has Phase at 0.5f

= –30.5° and Phase at

The

temperature range.

Note 1: Phase Deviation = 1/2(Phase at 0Hz – Phase at f

● denotes specifications which apply over the full operating

CUTOFF

= –235°.

CUTOFF

Passband Phase Deviation from Linear Phase

= 1/2[180° – (–235°)] – [(180° – (–30.5°)] = –3°

) – (Phase

CUTOFF

at 0Hz – Phase at 0.5f

)

CUTOFF

Phase at 0Hz = 180° (guaranteed by design)

TYPICAL PERFORMANCE CHARACTERISTICS

Passband Gain vs Frequency

Transition Band Gain vs Frequency

Stopband Gain vs Frequency

–40

–42

–44

–46

–48

–50

–52

–54

–56

–58

–60

1.0

0.5

= ±5V

= 500kHz

CLK

= 20kHz

= 2V

RMS

–0.5

–1.0

–1.5

–2.0

–2.5

–3.0

–3.5

–4.0

–10

–20

–30

–40

–50

21 23 25 27 29 31 33 35 37 39 41

FREQUENCY (kHz)

41 45 49 53 57 61 65 69 73 77 81

FREQUENCY (kHz)

11 13 15 17 19 21

FREQUENCY (kHz)

LTC1069-7 • TPC03

LTC1069-7 • TPC01

LTC1069-7 • TPC02

1 234 5 6 7 8

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