AD608ARZ Analog Devices Inc, AD608ARZ Datasheet - Page 12

• Manufacturer Part Number: AD608ARZ
• Description: IC MIXER/LIMITER IF 3V 16-SOIC
• Manufacturer: Analog Devices Inc
• Series: AD608r

Specifications of AD608ARZ

• Rf Type: FM, GSM, PM, PHS, FM
• Frequency: 500MHz
• Number Of Mixers: 1
• Gain: 24dB
• Noise Figure: 16dB
• Secondary Attributes: Down Converter
• Current - Supply: 7.3mA
• Voltage - Supply: 2.7 V ~ 5.5 V
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Supply Voltage Range: 3V To 5.5V
• Rf Ic Case Style: SOIC
• No. Of Pins: 16
• Operating Temperature Range: -25°C To +85°C
• Msl: MSL 1 - Unlimited
• Ic Function: Mixer/Limiter/RSSI Receiver IF Subsystem
• Termination Type: SMD
• Supply Voltage Min: 2.7V
• Rohs Compliant: Yes
• Operating Supply Voltage: 3V
• Operating Temperature (max): 85C
• Filter Terminals: SMD
• Digital Ic Case Style: SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

AD608
APPLICATIONS INFORMATION
Figure 24 shows the AD608 configured for operation in a digital
system at a 10.7 MHz IF. The input and output impedance of the
filter are parallel terminated using 330 Ω resistors, and the
conversion gain is 24 dB. The RF port is terminated in 50 Ω; in
a typical application, the input is matched to a SAW filter using
the impedance data provided in Table 5.
PRUP
LOHI
RFHI
GND
+5V
51.1Ω
51.1Ω
R1
R2
1nF
1nF
C2
C3
1130Ω
1nF
C4
R7
Figure 24. Application at 10.7 MHz (the Band-Pass Filter Can Be a Toko SK107 or Murata SFE10.7)
0.1µF
374Ω
C1
R3
LO INPUT
RF INPUT
–95dBm
–16dBm
–15dBm
TO
BIAS POINT
AT VPOS/2
1
2
3
4
5
6
7
8
51.1Ω
VPS1
COM1
LOHI
COM2
RFHI
RFLO
MXOP
VMID
R5
Figure 25. Narrow-Band FM Application at 450 kHz or 455 kHz
BPF REVERSE
TERMINATION
F1
AD608
R6
51.1Ω
100pF
100pF
C3
C2
LMOP
COM3
PRUP
FDBK
VPS2
RSSI
IFLO
IFHI
100pF
C4
1µF
C1
16
15
14
13
12
11
10
9
IF BIAS POINT
DECOUPLING
R1
330Ω
JUMPER
1kΩ
R16
47kΩ
1
2
3
4
5
6
7
8
R6
10.7MHz BPF Z = 330Ω
1.5kΩ
Rev. C | Page 12 of 16
VPS1
COM1
LOHI
COM2
RFHI
RFLO
MXOP
VMID
R4
0.2µF
AD608
C5 0.1µF
C9
C6 0.1µF
C8 0.1µF
+
C5
0.1µF
LMOP
COM3
PRUP
VPS2
FDBK
C7
0.1µF
RSSI
IFLO
IFHI
200Ω
8.66kΩ
24.9kΩ
R5
Figure 25 shows the AD608 configured for narrow-band FM
operation at a 450 kHz or 455 kHz with an external discriminator.
The IF filter has 1500 Ω input and output impedances—the
input is matched via a resistive divider, and the output is
terminated in 1500 Ω. The discriminator requires a 1 V p-p
drive from a 1 kΩ source impedance, which in Figure 25 is
provided by a Class A amplifier with a gain of 2.5.
330Ω
R15
R14
16
15
14
13
12
11
10
9
RSSI
R2
+
R12
1kΩ
TEMINATION
C7
18nF
10nF
F1: TOKO HCFM2–455B
F2: MURATA CFY455S
CR1, CR2: 1N60
Q1: 2N3906
C6
Q1
BPF
47kΩ
R13
402Ω
LIMO
R4
VPOS
+
0.1µF
C11
R3
100Ω
OFFSET-CONTROL
LOOP FILTER
SUPPLY
2.7V TO 5.5V
POWER-UP
3V CMOS
LIMITER
OUTPUT
VPOS –1V
±200mV
RSSI OUTPUT
+0.2V TO +1.8V
(20mV/dB)
F2
CR1
CR2
R8
1kΩ
R9
1kΩ
3.3kΩ
R10
C10
0.01µF
R11
3.3kΩ
AUDIO