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參數(shù)資料
| 型號： | AD6458ARS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | GSM 3 V Receiver IF Subsystem |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO20 |
| 封裝： | SSOP-20 |
| 文件頁數(shù)： | 3/12頁 |
| 文件大?。?/td> | 268K |
| 代理商： | AD6458ARS |
AD6458
–3–
REV. 0
ABSOLUTE MAXIMUM RATINGS
1
Supply Voltage VPS1, VPS2 to COM1, COM2 . . . . . +3.6 V
Internal Power Dissipation
2
. . . . . . . . . . . . . . . . . . . . 600 mW
Operating Temperature Range . . . . . . . . . . . –40
°
C to +85
°
C
Storage Temperature Range . . . . . . . . . . . . –65
°
C to +150
°
C
Lead Temperature, Soldering (60 sec) . . . . . . . . . . . +300
°
C
NOTES
1
Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute maximum rating
conditions for extended rating conditions for extended periods may affect device
reliability.
2
Thermal Characteristics: 20-Lead SSOP Package:
θ
JA
= 126
°
C/W.
ORDERING GUIDE
Temperature
Range
Package
Description
Package
Option
Model
AD6458ARS –40
°
C to +85
°
C 20-Lead Shrink Small Outline RS-20
PIN FUNCTION DESCRIPTIONS
Pin
Number
Pin
Label
Description
Function
1
FREF
Frequency Reference Input
Demodulation LO Input. May be 3 V CMOS input or >100 mV ac coupled for
lowest stand by current.
Ground.
CMOS compatible power up control; 0 = OFF, 3 V = ON.
AC coupled LO input. Only 50 mV drive needed, 500 mV max.
Usually connected to ac ground.
AC coupled, –109 dBV to –29 dBV RF input from 1 k
filter for optimal operation.
Ground.
High impedance input, sets gain scaling, typically 1.2 V.
Output of the Mixer.
Not internally connected. Should be grounded.
Differential Input of variable gain amplifier.
Differential Input of variable gain amplifier.
0.2 V–2.4 V using 3 V supply. Max gain at 0.2 V.
Differential Q Output.
Differential Q Output.
Differential I Output.
Differential I Output.
Supply Voltage.
Series RC loop filter, connected to VPS2.
Supply Voltage.
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
COM1
PRUP
LOIP
RFLO
RFHI
COM2
GREF
MXOP
NC
IFIP
IFIM
GAIN
QRXN
QRXP
IRXN
IRXP
VPS2
FLTR
VPS1
Common 1
Power-Up Input
Local Oscillator Input
RF “Low” Input
RF “High” Input
Common 2
Gain Reference Input
Mixer Output
IF Input “Plus”
IF Input “Minus”
Gain Control Input
Q Output “Negative”
Q Output “Positive”
I Output “Negative”
I Output “Positive”
VPOS Supply 2
PPL Loop Filter
VPOS Supply 1
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
AD6458
FREF
IRXP
VPS2
FLTR
VPS1
COM1
PRUP
LOIP
QRXN
QRXP
IRXN
RFLO
RFHI
COM2
GREF
MXOP
NC
IFIP
IFIM
GAIN
NC = NO CONNECT
WARNING!
ESD SENSITIVE DEVICE
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD6458 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
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