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AD61009 Fiches technique(PDF) 4 Page - Analog Devices

No de pièce AD61009
Description  Low Power Mixer 3 V Receiver IF Subsystem
Download  24 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

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REV. 0
–4–
AD61009
PIN FUNCTION DESCRIPTIONS
Pin
Mnemonic
Reads
Function
1
FDIN
Frequency Detector Input
PLL input for I/Q demodulator quadrature oscillator,
±400 mV
drive required from external oscillator. Must be biased at VP/2.
2
COM1
Common #1
Supply common for RF front end and main bias.
3
PRUP
Power-Up Input
3 V/5 V CMOS compatible power-up control; logical high =
powered-up; max input level = VPS1 = VPS2.
4
LOIP
Local Oscillator Input
LO input, ac coupled
±54 mV LO input required (–16 dBm for
50
Ω input termination).
5
RFLO
RF “Low” Input
Usually connected to ac ground.
6
RFHI
RF “High” Input
AC coupled,
±56 mV, max RF input for linear operation.
7
GREF
Gain Reference Input
High impedance input, typically 1.5 V, sets gain scaling.
8
MXOP
Mixer Output
High impedance, single-sided current output,
±1.3 V max voltage
output (
±6 mA max current output).
9
VMID
Midsupply Bias Voltage
Output of the midsupply bias generator (VMID = VPOS/2).
10
IFHI
IF “High” Input
AC coupled IF input,
±56 mV max input for linear operation.
11
IFLO
IF “Low” Voltage
Reference node for IF input; auto-offset null.
12
GAIN
Gain Control Input
High impedance input, 0 V–2 V using 3 V supply, max gain at
V = 0.
13
COM2
Common #2
Supply common for IF stages and demodulator.
14
IFOP
IF Output
Low impedance, single-sided voltage output, 5 dBm (
±560 mV)
max.
15
DMIP
Demodulator Input
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.
16
VPS2
VPOS Supply #2
Supply to high-level IF, PLL, and demodulators.
17
QOUT
Quadrature Output
Low impedance Q baseband output;
±1.23 V full scale in 20 kΩ
min load; ac coupled.
18
IOUT
In-Phase Output
Low impedance I baseband output;
±1.23 V full scale in 20 kΩ
min load; ac coupled.
19
FLTR
PLL Loop Filter
Series RC PLL Loop filter, connected to ground.
20
VPS1
VPOS Supply #1
Supply to mixer, low level IF, PLL, and gain control.
PIN CONNECTION
20-Lead SSOP (RS-20)
14
13
12
11
17
16
15
20
19
18
10
9
8
1
2
3
4
7
6
5
TOP VIEW
(Not to Scale)
AD61009
FDIN
QOUT
IOUT
FLTR
VPS1
COM1
PRUP
LOIP
IFOP
DMIP
VPS2
RFLO
RFHI
GREF
MXOP
VMID
IFHI
IFLO
GAIN
COM2


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