Si2157
Worldwide Digital and Analog TV Tuner
Description
A universal hybrid TV tuner, the Si2157 supports
digital and analog reception for all worldwide
terrestrial and cable TV standards. By combining
Silicon
Laboratories’
proven
digital
low-IF
th
-generation RF front-end, the
architecture with a 5
Si2157 maintains the highest performance that
exceeds that of MOPLL-based tuners, including
industry-leading 2
nd
order distortion performance.
Pin- and API-compatibility to the previous generation
minimize customers’ development effort.
The Si2157 delivers unprecedented integration with
no external balun, tracking filters, LNAs, SAW filters,
or inductive power supply filtering. While other
solutions may also eliminate the balun, they suffer
degradation in NF and 2
nd
order distortion
compromising reception. Silicon Laboratories’
proprietary and field-proven architecture delivers not
only an optimized BOM but also world-class system
performance. Options for single or dual supply and
internal power-on reset are included. A harmonic
rejection mixer delivers outstanding immunity to
Wi-Fi and LTE interference, replacing the need for
external filtering.
For advanced digital terrestrial TV reception, DVB-T2
and DVB-C2 constellations demand outstanding
phase noise specifications, and the Si2157 rises to
the challenge, delivering industry-leading integrated
phase noise. Additionally, a software-selectable
cable mode offers optimized return loss.
The Si2157 delivers exceptional picture quality and a
higher number of received stations when compared
to other solutions. Incorporating worldwide field
experience from four prior tuner generations in mass
production, the Si2157 delivers the highest tolerance
to real-world reception conditions.
ANTENNA
INPUT
Features
-
Worldwide hybrid TV tuner
-
Analog TV: NTSC, PAL/SECAM
-
Digital TV: ATSC/QAM, DVB-T2/T/C2/C, ISDB-T/C,
-
-
DTMB
Industry-leading margin to A/74, NorDig, D-Book,
C-Book, ARIB, EN55020, OpenCable™ specifications
Lowest BOM for a silicon hybrid TV tuner
-
No balun
-
No SAW filters or wire-wound inductors
-
Integrated LNAs and complete tracking filters
Best-in-class real-world reception
-
Exceeds discrete MOPLL-based tuners
-
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
-
Single-supply option for 3.3 V-only operation
Integrated power-on reset circuit
Flexible output interface
-
Combined ALIF/DLIF output to SoC
-
Optional DLIF output to external demodulator
Standard CMOS process technology
4x4 mm, 28-pin QFN package
RoHS compliant
-
-
-
-
-
-
-
-
-
-
-
-
Applications
Hybrid ½-NIM tuner module
iDTV (Integrated Digital TV)
Hybrid terrestrial and cable STB
Hybrid PVR, DVD and Blu-Ray disc recorder
PC-TV accessories
Si2157
PGA
OUTPUT
INTERFACE
I
ADC
Q
ADC
DSP
DSP
FILTER
ATV
FILTER
DEMOD
AGC
DLIF
AGC
ALIF
RSTB
CONTROL
INTERFACE
SDA
SCL
ADDR
DTV
DEMOD
ATV
DEMOD
PGA
RF
AGC
3.3 V
1.8 V
LDO
0 / 90
IF
AGC
LOW-IF
FREQ
SYNTH
AV
SoC
XOSC
XTAL_O
XTAL_I
XOUT
GPIO
Hybrid TV Tuner
Copyright © 2012 by Silicon Laboratories
12.19.12
Si2157
Worldwide Digital and Analog TV Tuner
Selected Electrical Specifications
Parameter
Supply voltage
Total Power Consumption
RF Input Frequency Range
NF, terrestrial*
VHF-L
VHF-H
UHF
Return Loss*
Wideband IIP3*
Inband IIP3*
LO Phase Noise at 860 MHz
LO Integrated Phase Noise at 860 MHz
Analog IF Spurious Distortion
ALIF/DLIF Output Center Frequency
ALIF/DLIF Differential Output Voltage
Terrestrial mode
Cable mode
VHF-H, N
18,
36
VHF-H, N
1,
2
1 kHz
10 kHz
100 kHz
1 MHz
DSB: 125 Hz to 4 MHz
S=P
channel BW=6 MHz
7 MHz
8 MHz
Programmable
ATV Mode, XOUT Disabled
(V
DD_H
=3.3 V, V
DD_L
=1.8 V, V
DD_D
=1.8 V, T
A
=25
C)
Test Condition
Typ
1.8 and 3.3, or only 3.3
496
42 to 870
4.0
3.7
3.8
3
9
+5
–6
–100
–100
–105
–132
0.25
(-47)
–72
4 to 7
4.5 to 6.5
5 to 6
0.5 to 2.0
Unit
V
mW
MHz
dB
dB
dB
dB
dB
dBm
dBm
dBc/Hz
rms
(dBc)
dB
MHz
Vppd
*Note:
Measured at the F-connector input of the Si2157 EVB and includes all connector, PCB, and front-end circuit
losses.
Selection Guide
Part #
Si2157
Description
Worldwide hybrid TV tuner for NTSC, PAL/SECAM, ATSC/QAM, DVB-T2/T/C2/C, ISDB-T/C, DTMB
Pin Assignments
LDO_ADJ
XTAL_O
4x4 mm QFN-28 Package Information
A
PIN#1 I .D.
(LA SER M ARK)
XTAL_I
VDD_H
VDD_H
XOUT
GND
Pi n # 1 ID
RF_REF 22
RF_IP 23
RF_IN 24
RF_SHLD 25
ADDR 26
RSTB 27
AGC1 28
1
GPIO1
21
20
19
18
17
16
15
14 VDD_L
B
f
e
13 ALIF_P
4X cx c
eee
C A B
C
SE ATI NG PLANE
DE TAI L "A"
GND
PAD
12 ALIF_N
11 DLIF_P
10 VDD_H
9 DLIF_N
ddd
C A B
Symbol
A
D, E
e
f
Min
0.80
Nom
0.85
4.00 BSC
0.50 BSC
3.50 BSC
Max
0.90
Unit
mm
mm
mm
mm
12.19.12
2
GPIO2
3
AGC2
4
SCL
5
SDA
6
VDD_IO
7
GND
8 VDD_D
Hybrid TV Tuner
Copyright © 2012 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.
PCB Design
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