Datasheet > LTC1064_09

LTC1064_09

更新时间： 2022-12-28 23:35:34

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
20页	262K
描述
Low Noise, Fast, Quad Universal Filter Building Block

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LTC1064_09 数据手册

LTC1064

PIN FUNCTIONS

V⁺, V^–(Pins 7, 19): Power Supplies. They should be

bypassed with a 0.1µF ceramic capacitor. Low noise,

nonswitching power supplies are recommended. The de-

vice operates with a single 5V supply and with dual

supplies. The absolute maximum operating power supply

voltage is ±8V.

AGND (Pin 6): Analog Ground. When the LTC1064 oper-

ates with dual supplies, Pin 6 should be tied to system

ground.WhentheLTC1064operateswithasinglepositive

supply, the analog ground pin should be tied to 1/2 supply

and it should be bypassed with a 1µF solid tantalum in

parallel with a 0.1µF ceramic capacitor, Figure 1. The

positive input of all the internal op amps, as well as the

common reference of all the internal switches, are inter-

nally tied to the analog ground pin. Because of this, a very

“clean” ground is recommended.

50/100 (Pin 17): By tying Pin 17 to V⁺, all filter sections

operate with a clock-to-center frequency ratio internally

setat50:1. WhenPin17isatmid-supplies, sectionsBand

C operate with (f_CLK/f_O) = 50:1 and sections A and D

operate at 100:1. When Pin 17 is shorted to the negative

supply pin, all filter sections operate with (f_CLK/f_O) =

100:1.

CLK (Pin 18): Clock. For ±5V supplies the logic threshold

level is 1.4V. For ±8V and 0V to 5V supplies the logic

threshold levels are 2.2V and 3V respectively. The logic

threshold levels vary ±100mV over the full military tem-

perature range. The recommended duty cycle of the input

clockis50%,althoughforclockfrequenciesbelow500kHz,

the clock “on” time can be as low as 200ns. The maximum

clock frequency for ±5V supplies is 4MHz. For ±7V

supplies and above, the maximum clock frequency is

7MHz.

LTC1064

V+/2

–

AGND

CLOCK INPUT

= 15V, TRIP VOLTAGE = 7V

= 10V, TRIP VOLTAGE = 6.4V

= 5V, TRIP VOLTAGE = 3V

CLK

1µF

0.1µF

50/100

TO DIGITAL

GROUND

ANALOG

GROUND

PLANE

1064 F01

NOTE: PINS 5, 8, 20, IF NOT USED, SHOULD BE CONNECTED TO PIN 6

Figure 1. Single Supply Operation

1064fb

1...3 4 567 8 9...20

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