IDTF1200 Datasheet, PDF (1/13 Pages) Integrated Device Technology – Intermediate Frequency Digital Variable Gain Amplifier

DATASHEET
Intermediate Frequency Digital Variable Gain Amplifier
IDTF1200
GENERAL DESCRIPTION
The IDTF1200 is a Digitally Controlled Intermediate
Frequency Differential Variable Gain Amplifier for
BaseStation and other commercial applications with a
low IF frequency. The device offers extremely low
Noise Figure over the entire gain control range. The
device is packaged in compact 5x5 Thin QFNs with 200
ohm differential input and output impedances for ease
of integration into the receiver lineup. Versions
covering IF frequencies up to 300 MHz with low
distortion are available.
COMPETITIVE ADVANTAGE
The F1200 acts to enhance system SNR when VGA gain
is reduced. The F1200 noise figure (NF) degrades only
slightly (NF slope ~ -0.16 ^dB/_dB) over a 13 dB control
range while holding the Output IP3 approximately
constant. The resultant improvement in noise can
enhance the system SNR up to 2 decibels at low gain
settings relative to a standard VGA.
The device has excellent DNL and INL simplifying digital
compensation. The device also offers the extremely low
Harmonic, IM2, and IM3 distortion necessary to drive an
ADC directly in an IF sub-sampling application.
FEATURES
 Ideal for high SNR systems
 22 dB typ Maximum Gain
 23 dB gain control range
 7 bit parallel control
 0.25 dB Gain Steps
 Excellent Noise Figure < 3.0 dB
 5mm x 5mm 28 pin package
 200 Ω Differential Input
 200 Ω Differential Output
 NF degrades < 2dB @ 12dB reduced gain
 50 MHz – 160 MHz frequency range
 Ultra-Linear: IP3_O +48 dBm typical
 External current setting resistor
 Fast Gain Step Settling < 20 nsec
DEVICE BLOCK DIAGRAM
`
ATTN
Out
AMP
In
APPLICATIONS
ATTN
In
AMP
out
 BaseStation Diversity Receivers
 Digital Pre-Distortion
 Wave Point-to-Point Radios
 Public Safety Receivers
PART# MATRIX
Part#
Gain
Range
IP3O
IF freq
range
NF
F1200
22 to -1
48
50 - 160
2.6
F1206* 20 to -11
47
150 - 250
3.6
F1207* 20 to -11
46
230 - 300
3.7
*Future Product
Gain <sup>7</sup>
Control
Decode
Logic
Bias
Control
V<sub>CC</sub>
ry <sup>VCC VMODE</sup>
I<sub>SET</sub> STBY
`
ta ORDERING INFORMATION
rie Omit IDT
prefix
0.75 mm height ^{Tape &}
package
Reel
I_ID_DTF_T12_P0_r0_oN^pBGI8 _{RF product Line}
Green
Industrial
Temp range
RevO
Page 1 of 13
April, 2011