Si2124
Digital Terrestrial Set-Top Box Tuner
Description
Built upon six generations of field-proven TV tuner
technology, the Si2124 is Silicon Labs’ first digital set-top
box (STB) tuner designed specifically for digital terrestrial
STB applications. Like the previous generations of Silicon
Labs' digital TV tuners, the Si2124 maintains very high
linearity and low phase noise to deliver superior picture
quality compared to competing silicon tuners.
Available in an industry-leading 3x3 mm QFN package, the
Si2124 delivers the lowest-cost, most design-friendly and
area-efficient digital terrestrial STB solution available today.
A fully-integrated RF front-end eliminates the need for an
external balun, LNAs, SAW filters, and inductive power
supply filtering. Also included is a fully-integrated
loop-through function with a zero-power mode switch
(ZPS) for additional board area and BOM savings. An
on-chip 1.8 V LDO enables single-supply operation, while
a dual-supply option offers additional system flexibility. The
Si2124’s excellent immunity to LTE interference and
harmonic rejection mixer with outstanding immunity to
Wi-Fi interference eliminate the need for external filtering.
For advanced digital broadcast standards with high-order
constellations, such as DVB-T2, the Si2124's superior
integrated phase noise delivers industry-leading reception
performance.
The Si2124 delivers a higher number of received stations
compared to other silicon tuners. Incorporating worldwide
field experience from prior generations of digital tuners in
mass production, the Si2124 delivers the highest tolerance
to real-world reception conditions.
Features
-
Digital terrestrial STB tuner
-
ATSC, DVB-T2/T, ISDB-T
-
1.7 MHz, 6 MHz, 7 MHz, 8 MHz, and 10 MHz chan-
-
-
nel bandwidths
Conforms to Nordig, DTG, and ARIB
Lowest BOM for a digital terrestrial STB tuner
-
No balun, SAW filters, or wire-wound inductors
-
Integrated loop-through with zero-power mode
-
Integrated LNAs and complete tracking filters
Best-in-class real-world reception
-
Industry-leading phase noise performance
-
High immunity to Wi-Fi and LTE interference
Low power consumption
-
3.3 V and 1.8 V power supplies
-
Integrated 1.8 V LDO for 3.3 V single-supply
operation
Single Low-IF (LIF) output to SoC and/or demodulator
Standard CMOS process technology
Smallest footprint for a silicon digital TV tuner
-
3x3 mm, RoHS-compliant 24-pin QFN
-
-
-
-
-
Applications
-
Digital tuner modules
-
Digital terrestrial STB
-
Digital PVR, DVD and Blu-Ray disc recorder
LOOP THROUGH
RF OUT
ZPS
Si2124
DSP
FILTER
OUTPUT
INTERFACE
PGA
I
ADC
Q
ADC
AGC
LIF
DTV
DEMOD
ANTENNA
INPUT
PGA
CONTROL
INTERFACE
RF
AGC
3.3 V
1.8 V
1.8 V
LDO
0 / 90
IF
AGC
LOW-IF
SDA
SCL
ADDR
AV
SoC
FREQ
SYNTH
XOSC
Digital Terrestrial Set Top Box Tuner Copyright © 2015 by Silicon Laboratories
XTAL_O
XTAL_I
GPIO
XOUT
4.3.15
Si2124
Digital Terrestrial Set-Top Box Tuner
Selected Electrical Specifications
(V
DDH
= 3.3 V, V
DDL
= 1.8 V, T
A
= 25 °C)
Parameter
Supply voltage
Total Power Consumption
RF Input Frequency Range
NF, Terrestrial Mode
VHF-L1 (42–106 MHz)
VHF-L2 (107–247 MHz)
VHF-H (248–470 MHz)
UHF (471–870 MHz)
LO Phase Noise at 860 MHz
LO Integrated Phase Noise at 860 MHz
LIF Output Center Frequency
LIF Differential Output Voltage
Loop Through Output
RF Frequency Range (LT only)
LT Output Return Loss (Active)
LT Noise Figure (Active)
LT Gain
Max gain
Active mode
Zero-power mode
42 to 870
10
6.7
2.2
–3.2
MHz
dB
dB
dB
dB
1 kHz | 10 kHz | 100 kHz | 1 MHz
DSB: 125 Hz to 4 MHz
Channel BW = 6 MHz | 7 MHz | 8 MHz
Programmable
External 1.8 V supply, LT disabled
Test Condition
Typ
1.8 and 3.3, or only 3.3
486
42 to 870
4.5
2.4
3.0
4.0
–100 | –100 | –105 | –132
0.25
(–47)
4 to 7 | 4.5 to 6.5 | 5 to 6
0.5 to 2.0
Unit
V
mW
MHz
dB
dB
dB
dB
dBc/Hz
°rms
(dBc)
MHz
V
ppd
*Note:
Includes all connector, PCB and front-end circuit losses at the F-connector input of the Si2124 EVB.
Selection Guide
Part #
Si2124
Description
Digital terrestrial Set Top Box tuner for ATSC, DVB-T2/T, ISDB-T
Pin Assignments
RF_OUT
XTAL_O
XTAL_I
VDDH
VDDH
GND
3x3 mm QFN-24 Package Information
RF_REF 19
RF_IP 20
GND 21
RF_IN 22
ADDR 23
GPIO1 24
1
GPIO2
18
17
16
15
14
13
12 XOUT
11 LIF_P
GND
PAD
10 LIF_N
9
8
VDDH
GND
Dimension
A
D, E
e
e1
J, K
Min
0.80
Nom
0.85
3.00 BSC
0.40 BSC
0.45 BSC
Max
0.90
Unit
mm
mm
mm
mm
2
SDA
3
SCL
4
AGC2
5
AGC1
6
GND
7 VDDL
1.60
1.70
1.80
mm
4.3.15
Digital Terrestrial Set Top Box Tuner Copyright © 2015 by Silicon Laboratories
Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.
Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders
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