AD6458-AD6458ARS Fast Delivery |IC PHOENIX CO.,LIMITED

AD6458 ,GSM 3 V Receiver IF SubsystemSPECIFICATIONSA PParameter Conditions Min Typ Max UnitsMIXERMaximum RF and LO Frequency 400 MHzAGC ..
AD6458ARS ,GSM 3 V Receiver IF SubsystemGENERAL DESCRIPTIONsignal drives the I and Q demodulators. This locked referenceThe AD6458 is a 3 V ..
AD6459ARS ,GSM 3 V Receiver IF SubsystemCharacteristics: 20-lead SSOP package: θ = 126°C/W.JA9 IFIMMXOP 1210 IFIPMXOM 11ORDERING GUIDETemp ..
AD6459ARS ,GSM 3 V Receiver IF SubsystemSPECIFICATIONS A PModel AD6459ARSParameter Conditions Min Typ Max UnitsDYNAMIC PERFORMANCEMIXERMaxi ..
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AD6458-AD6458ARS
GSM 3 V Receiver IF Subsystem
REV.0
GSM 3 V Receiver IF Subsystem
FUNCTIONAL BLOCK DIAGRAMFEATURES
Fully Compliant with Standard and Enhanced GSM
Specification
–12 dBm Input 1 dB Compression Point
–2 dBm Input Third Order Intercept
10 dB SSB Noise Figure (330 V)
DC–400 MHz RF and LO Bandwidths
Linear IF Amplifier
Linear-in-dB and Stable over Temperature Voltage
Gain Control
Quadrature Demodulator
Onboard Phase-Locked Quadrature Oscillator
Demodulates IFs from 5 MHz to 50 MHz
Low Power
9 mA at Midgain
1 mA Sleep Mode Operation
3.0 V to 3.6 V Operation
Interfaces to AD7013, AD7015 and AD6421 Baseband
Converters
20-Lead SSOP
GENERAL DESCRIPTION
The AD6458 is a 3 V, low power receiver IF subsystem for
operation at input frequencies as high as 400 MHz and IFs from
5 MHz up to 50 MHz. It is optimized for operation in GSM,
DCS1800 and PCS1900 receivers. It consists of a mixer, IF
amplifier, I and Q demodulators, a phase-locked quadrature
oscillator, precise AGC subsystem, and a biasing system with
external power-down.
The low noise, high intercept mixer of the AD6458 is a
doubly-balanced Gilbert cell type. It has a nominal –12 dBm
input-referred 1 dB compression point and a –2 dBm input-
referred third-order intercept. The mixer section of the AD6458
also includes a local oscillator (LO) preamplifier, which lowers
the required LO drive to –16 dBm.
The gain control input accepts an external gain-control voltage
input from an external AGC detector or a DAC. It provides an
80 dB gain range with 27 mV/dB gain scaling.
The I and Q demodulators provide inphase and quadrature
baseband outputs to interface with Analog Devices’ AD7013
(IS54, TETRA, MSAT) and AD7015 and AD6421 (GSM,
DCS1800, PCS1900) baseband converters. An onboard
quadrature VCO which is externally phase-locked to the IF
signal drives the I and Q demodulators. This locked reference
signal is normally provided by an external VCTCXO under the
control of the radio’s digital processor. The AD6458 can also
provide demodulation of N-PSK and N-QAM in many non-
TDMA systems when used with external analog carrier recovery
systems such as the Costas Loop. Finally, the VCO can be
phase-locked to a frequency which is deliberately offset from the
IF, as in the case of a Beat-Frequency Oscillator (BFO), result-
ing in the product detection of CW or SSB.
The AD6458 uses supply voltages from 3.0 V to 3.6 V over the
temperature range of –40°C to +85°C. Operation is enabled by
a CMOS logical level; response time is typically <80 μs. When
disabled, the standby current is reduced to 1 μA.
The AD6458 comes in a 20-lead shrink small outline (SSOP)
surface-mount package.
AGC
FREF
AD6458–SPECIFICATIONS(@ TA = +258C, VP = 3.0 V, GREF = 1.2 V, unless otherwise noted)
NOTESIncluding IF noise and using 13 MHz ceramic filter, at VGAIN = 0.2 V.Histograms of Demodulator Offset Voltage Variation in Gain and Temperature can be found in Figures 23 to 27.Max value represent the value at six times the standard deviation, in the worst case condition (TA = +85°C). The value at three times the standard deviation is 5 μA.Max value represent the value at six times the standard deviation. The value at three times the standard variation is 19 mA.
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS1
Supply Voltage VPS1, VPS2 to COM1, COM2 . . . . . +3.6 V
Internal Power Dissipation2 . . . . . . . . . . . . . . . . . . . . 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
NOTESStresses 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.Thermal Characteristics: 20-Lead SSOP Package: θJA = 126°C/W.
ORDERING GUIDE
PIN FUNCTION DESCRIPTIONS
PIN CONNECTION
20-Lead SSOP (RS-20)
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V 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.
AD6458
20kΩVPOS
MXOP
Figure1.Characterization Board
50Ω
50Ω
50Ω
Figure 2.Characterization Test Set
AD6458
MOTHER BOARD
PRUPVPOSVINVP
IOUT
QOUT
GAIN
Figure 3.Mixer Characterization Setup
PRUP
AD6458
RF FREQUENCY – MHz120
NOISE FIGURE – dB
160200240280320360400440
Figure 5.Mixer Noise Figure vs. RF Frequency
NOISE FIGURE – dB
PERCENTAGE7.08.47.27.47.67.88.08.2
Figure 6.Mixer Noise Figure Histogram, RS = 1 kΩ,
FRF = 83 MHz, FIF = 13 MHz
RF FREQUENCY – MHz
RESISTANCE – k
CAP – pF
3.5
Figure 7.Mixer Input Impedance vs. RF Frequency,
VPOS = 3.0 V, TA = +25°C
RF FREQUENCY – MHz
CONVERSION GAIN – dB
–10
Figure 8.Mixer Conversion Gain vs. RF Frequency,
TA = +25°C, VPOS = 3.0 V, VREF =1.2 V, FIF =13 MHz
GAIN – dB
IF FREQUENCY – MHz
–105414182226303438424650
Figure 9.Mixer Conversion Gain vs. IF Frequency,
TA = +25°C, VPOS = 3 V, VREF = 1.2 V, FRF = 250 MHz
VGAIN – Volts
GAIN – dB
–10
Figure 10.Mixer Conversion Gain vs VGAIN, VREF = 1.2 V,
FIF =13 MHz, FRF = 83 MHz

Partno	Mfg	Dc	Qty	Available	Descript
AD6458		N/a	22596	avai	GSM 3 V Receiver IF Subsystem
AD6458ARS	AD	N/a	10000	avai	GSM 3 V Receiver IF Subsystem