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componentes Descripción

Fabricante

AD607

Low Power Mixer/AGC/RSSI 3 V Receiver IF Subsystem

Analog Devices 

AD607

Pin Mnemonic

1 FDIN

2 COM1

3 PRUP

4 LOIP

5 RFLO

6 RFHI

7 GREF

8 MXOP

9 VMID

10 IFHI

11 IFLO

12 GAIN/RSSI

13 COM2

14 IFOP

15 DMIP

16 VPS2

17 QOUT

18 IOUT

19 FLTR

20 VPS1

PIN DESCRIPTION

Reads

Frequency Detector Input

Common #1

Power-Up Input

Local Oscillator Input

RF “Low” Input

RF “High” Input

Gain Reference Input

Mixer Output

Midsupply Bias Voltage

IF “High” Input

IF “Low” Voltage

Gain Control Input/RSSI Output

Common #2

IF Output

Demodulator Input

VPOS Supply #2

Quadrature Output

In-Phase Output

PLL Loop Filter

VPOS Supply #1

Function

PLL input for I/Q demodulator quadrature oscillator, ± 400 mV

drive required from external oscillator. Must be biased at VP/2.

Supply common for RF front end and main bias.

3 V/5 V CMOS compatible power-up control; logical high =

powered-up; max input level = VPS1 = VPS2.

LO input, ac coupled ± 54 mV LO input required (–16 dBm for

50 Ω input termination).

Usually connected to ac ground.

AC coupled, ± 56 mV, max RF input for linear operation.

High impedance input, typically 1.5 V, sets gain scaling.

High impedance, single-sided current output, ± 1.3 V max voltage

output (± 6 mA max current output).

Output of the midsupply bias generator (VMID = VPOS/2).

AC coupled IF input, ± 56 mV max input for linear operation.

Reference node for IF input; auto-offset null.

High impedance input, 0 V–2 V using 3 V supply, max gain at

V = 0. RSSI Output when using Internal AGC Detector; RSSI

voltage is across AGC Capacitor connected to this pin.

Supply common for IF stages and demodulator.

Low impedance, single-sided voltage output, +5 dBm (± 560 mV)

max.

Signal input to I and Q demodulators ± 150 mV max input at IF

> 3 MHz for linear operation; ± 75 mV max input at IF < 3 MHz

for linear operation. Must be biased at VP/2.

Supply to high-level IF, PLL, and demodulators.

Low impedance Q baseband output ± 1.23 V full scale in 20 kΩ

min load; ac coupled.

Low impedance I baseband output; ± 1.23 V full scale in 20 kΩ

min load; ac coupled.

Series RC PLL Loop filter, connected to ground.

Supply to mixer, low level IF, PLL, and gain control.

PIN CONNECTION

20-Pin SSOP (RS-20)

FDIN 1

20 VPS1

COM1 2

19 FLTR

PRUP 3

18 IOUT

LOIP 4

17 QOUT

RFLO 5 AD607 16 VPS2

RFHI

6

TOP VIEW

(Not to Scale)

15

DMIP

GREF 7

14 IFOP

MXOP 8

13 COM2

VMID 9

12 GAIN/RS

IFHI 10

11 IFLO

–4–

REV. 0

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