Datasheet > LTC1069-1

LTC1069-1

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	242K
描述
Low Power, 8th Order Progressive Elliptic, Lowpass Filter

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LTC1069-1 数据手册

LTC1069-1

U W

TYPICAL PERFORMANCE CHARACTERISTICS

Output Voltage Swing vs

Temperature

Supply Current vs Clock

Supply Current vs Supply Voltage

Frequency

= 10Hz

5.0

4.5

4.0

3.5

3.0

2.5

2.0

CLK

= ±5V

= ±2.5V

= ±5V

25°C

= ±1.57V

85°C

–40°C

= 5V

–1

–2

–3

–4

–5

= ±2.5V

= 3.3V

= ±5V

–40 –20

0.5

0.6 0.7 0.8 0.9 1.0 1.2

0.1

0.4

0.2 0.3

TOTAL SUPPLY VOLTAGE (±V)

CLOCK FREQUENCY (MHz)

AMBIENT TEMPERATURE (°C)

1069-1 G15

1069-1 G14

1069-1 G13

PIN FUNCTIONS

V⁺, V^–(Pins 2, 7): Power Supply Pins. The V⁺(Pin 2) and

the V^–(Pin 7) should be bypassed with a 0.1µF capacitor

to an adequate analog ground. The filter’s power supplies

should be isolated from other digital or high voltage

analog supplies. A low noise linear supply is recom-

mended. Using switching power supplies will lower the

signal-to-noise ratio of the filter. Unlike previous mono-

lithic filters, the power supplies can be applied at any

order, that is, the positive supply can be applied before the

negative supply and vice versa. Figure 2 shows the con-

nection for dual supply operation.

AGND (Pin 1): Analog Ground. The quality of the analog

signal ground can affect the filter performance. For either

single or dual supply operation, an analog ground plane

surrounding the package is recommended. The analog

ground plane should be connected to any digital ground at

a single point. For dual supply operation Pin 1 should be

connected to the analog ground plane.

For single supply operation Pin 1 should be bypassed to the

analog ground plane with a 0.47µF or larger capacitor. An

internal resistive divider biases Pin 1 to 1/2 the total power

supply. Pin 1 should be buffered if used to bias other ICs.

Figure1showstheconnectionsforsinglesupplyoperation.

AGND

OUT

AGND

OUT

0.47µF

–

LTC1069-1

0.1µF

CLK

ANALOG GROUND PLANE

STAR

SYSTEM

GROUND

DIGITAL

GROUND

PLANE

STAR

SYSTEM

GROUND

DIGITAL

GROUND

PLANE

CLOCK

SOURCE

CLOCK

SOURCE

1069-1 F01

1069-1 F02

Figure 2. Connections for Dual Supply Operation

Figure 1. Connections for Single Supply Operation

1 2 3 456 7 8

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