Datasheet > D824H8B

D824H8B

更新时间： 2022-12-17 13:31:12

品牌	Logo	应用领域
FREQUENCYDEVICES		/
页数	文件大小	规格书
13页	535K
描述
2" x 2" Differential Input 4-Pole Filters

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数据手册

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D824H8B 数据手册

D824 Series

Digital Tuning &

8-Bit Programmable Filters

Control Characteristics

Pin-Out Key

Digital Tuning Characteristics

Analog Input Signal

D₇Tuning Bit 7 (MSB)

D₆Tuning Bit 6

D₅Tuning Bit 5

D₄Tuning Bit 4

D₃Tuning Bit 3

The digital tuning interface circuits are a parallel set of eight (8)

4053 CMOS switches which accept CMOS compatible inputs

for the eight tuning bits (D₀- D₇).

OUT Analog Output Signal

GND Power and Signal Return

+Vs Supply Voltage, Positive

-Vs Supply Voltage, Negative

Filter tuning follows the tuning equation given below:

Offset Adjustment

D₂Tuning Bit 2

D₁Tuning Bit 1

D₀Tuning Bit 0 (LSB)

f^c= ( fmax/256 ) [ 1 + D₇x 2⁷+ D₆x 2⁶+ D₅x 2⁵+ D₄x 2⁴+ D₃

x 2³+ D₂x 2²+ D₁x 2¹+ D₀x 2⁰]

where D₁- D₇= "0" or "1", and

OUT +Vs

-Vs

fmax = Maximum tuning frequency;

fc = corner frequency;

D₇

D₆

D₅

Minimum tunable frequency = fmax/256 (D₀thru D₇= 0);

Minimum frequency step (Resolution) = fmax/256

D₄

GND

D₃

D₂

D₁

D₀

Data Input Specifications

2.00

Input Data Levels

(CMOS Logic)

Input Voltage (Vs = 15 Vdc)

Low Level In

High Level In

0 Vdc min.

11 Vdc min.

4 Vdc max.

15 Vdc max.

Input Current

High Level In

Low Level In

+IN-IN Os⁴

- 10 ^-5mA typ. -1 mA max..

+10 ^-5mA typ. +1 mA max.

Bottom View

Input Capacitance

Input Data Format

Positive Logic

5 pF typ

7.5 pF max.

Bit

MSB ---

---

LSB

Frequency Select Bits

Weight

Logic "1" = +Vs

Logic "0" = Gnd

2⁷

2⁶

2⁵

2⁴

2³

2²

2¹

2⁰

Corner

Frequency

D₇

D₆

D₅

D₄

D₃

D₂

D₁

D₀

Bit Weighting

D₀

(Binary-Coded)

LSB (least significant bit)

fmax/256

f^max/128

f^max/64

fmax/32

f^max/16

f^max/8

D₇

MSB (most significant bit)

Frequency Range

256 : 1, Binary Weighted

fmax/4

f^max/2

fmax

1784 Chessie Lane, Ottawa, IL 61350 • Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176

e-mail: sales@freqdev.com • Web Address: http://www.freqdev.com

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