AD6140 datasheet(4/8 Pages) AD

No de pièce	AD6140

Description	Bandpass IF Subsystem

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Fabricant	AD [Analog Devices]

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AD6140

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PIN FUNCTION DESCRIPTION

No

Name

Function

Applicable Signal Levels

1

LNA_FORCE

Output For Biasing Discrete LNA

Output Ranges from 0 V (LNA OFF) to 2.7 V

2

LNA_SENSE

Input For Biasing Discrete LNA

VDD to VDD – 0.3 V Input

3

CLK_IN+

Positive 6.144 MHz ADC Clock Input

800 mV p-p Differential Input

VDD to VDD – 0.8 V Levels

Direct Coupled into 1500

Ω Impedance

4

CLK_IN–

Negative 6.144 MHz ADC Clock Input

800 mV p-p Differential Input

VDD to VDD – 0.8 V Levels

Direct Coupled into 1500

Ω Impedance

5

BUFFER_GND

ECL-to-CMOS Level Translator Ground

Pin Connected to Ground

6Σ∆_DATA_OUT

Σ∆ ADC Serial Data Output

CMOS Logic Levels

7Σ∆_CLOCK_OUT

6.144 MHz ADC Clock Output

CMOS Logic Levels

8

BUFFER_VDD

ECL-to-CMOS Level Translator VDD

Digital Supply Input

9

POWER_DOWN

Turns IC Off and On

CMOS Logic Levels; 0 V = ON, VPOS = OFF

10

AGC_TC_SELECT

AGC Time Constant Select; Changes

CMOS Logic Levels; 0 V = Fast Mode,

AGC Capacitor Charging Current by 56:1,

VPOS = Slow Mode

where FAST AGC Current is 56

× SLOW

AGC Current

11

DVDD

Digital Power Supply Input

Pin Connected to Digital Supply

12

DGND

Digital Ground

Pin Connected to Ground

13

AGC_CAPACITOR

Charge/Discharge Current into AGC

AGC Integration Capacitor

Integrator Capacitor

Connected to Ground

14

LO_IN+

Positive LO Input

200 mV p-p Differential Input; Internally

AC-Coupled into 1500

Ω Impedance

15

LO_IN–

Negative LO Input

200 mV p-p Differential Input, Internally

AC-Coupled into 1500

Ω Impedance

16

BIAS_RESISTOR

Resistor to Ground Sets Overall Bias

39 k

Ω Resistor Connected to Ground

Current and Power Consumption

17

VOLTAGE_REFERENCE_IN

ADC Voltage Reference Input

Regulated and Filtered 1.0 V

± 5% Input

18

AGND

Analog Ground

Pin Connected to Ground

19

IF_INPUT

IF Input

Typically 16.4

µV p-p to 65.2 mV p-p

20

AVDD

Analog Power Supply Input

Pin Connected to Analog Supply

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