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IDTF1241

Description
Dual IF Digital Variable Gain Amplifier
File Size1MB,21 Pages
ManufacturerIDT (Integrated Device Technology, Inc.)
Websitehttp://www.idt.com/
Download Datasheet View All

IDTF1241 Overview

Dual IF Digital Variable Gain Amplifier

IDTF1241
DATASHEET
Dual IF Digital Variable Gain Amplifier
10 – 500 MHz IDTF1241NBGI
G
ENERAL
D
ESCRIPTION
The IDTF1241 (1 dB steps) is an IF VGA for Diversity
Basestation receivers. The device offers significantly
better Noise and Distortion performance than currently
available devices. It is packaged in a compact 5x5
Thin QFN with 200 ohm differential input and output
impedances for ease of integration into the receiver
lineup.
F
EATURES
Ideal for systems with high SNR requirements
20 dB typical Maximum Gain
5-bit, 1 dB step, 31 dB gain control range
Excellent Noise Figure = 4.0 dB
5mm x 5mm 32 pin package
200
Differential Matched Input
200
Differential Matched Output
No termination resistors required
NF degrades just 1.3 dB @ 10 dB below Max Gain
10 MHz – 500 MHz frequency range
Ultra-Linear: IP3
O
+48 dBm typical
Excellent 2
nd
Harmonic Rejection < -80 dBc
Parallel Control
External current setting resistors
Very fast settling < 15 nsec
Individual Power Down Modes
Extremely Low Power: 80 mA / Chan
C
OMPETITIVE
A
DVANTAGE
The IDTF1241 IF VGA improves system Signal-to-Noise
Ratio (SNR), especially at lower gain settings. Via IDT’s
proprietary FlatNoise
TM
technology both IP3
O
& NF are
kept virtually flat while gain is backed
off, enhancing SNR significantly under
high level interferer conditions, and
TM
FlatNoise
TM
greatly benefiting 2G/3G/4G Multi-
Carrier IF sampling receivers.
The fast-settling gain step of 1 dB coupled with pinpoint
accuracy allow for SNR to be maximized further by
targeting the minimum necessary gain in small, accurate
increments.
See the ‘Applications Information’ section starting on
Page 17 for more details of the benefits of the F1241 in
IF sampling receivers.
A
PPLICATIONS
Base Station 2G, 3G, 4G, TDD radiocards
Repeaters and E911 systems
Digital Pre-Distortion
Point to Point Infrastructure
Public Safety Infrastructure
WIMAX Receivers and Transmitters
Military Systems, JTRS radios
P
ART
# M
ATRIX
Part#
F1241
Range /
Step
20 to -11
1.0
20 to -11.5
0.5
IP3
O
48
IF freq
range
10 - 500
NF
4
Pinout
Compatibility
D
EVICE
B
LOCK
D
IAGRAM
ADI
ATTN
In A
AMP
out A
F1240
47
10 - 500
4
TI (NSM)
Gain
Control
10
V
CC
O
RDERING
I
NFORMATION
Omit IDT
prefix
0.8 mm height Tape &
Reel
package
V
CC
Decode
Logic
Bias
Control
2
STBY
A
STBY
B
I
SET
IDTF1241NBGI8
RF product Line
Green
Industrial
Temp range
ATTN
In B
AMP
out B
IDT FlatNoise
TM
IF VGA
1
Rev O Nov 2012
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