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PDF GS3140 Data sheet ( Hoja de datos )
| Número de pieza | GS3140 | |
| Descripción | Multi-Rate Adaptive 3G SDI Equalizer | |
| Fabricantes | Semtech | |
| Logotipo |  |
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GS3140
Multi-Rate Adaptive 3G SDI
Equalizer
Key Features
• Multi-standard operation at rates between 1Mb/s and
2.97Gb/s
• SMPTE ST 424, SMPTE ST 292 and SMPTE ST 259
compliant
• AES10 (MADI) compatible
• Industry leading cable reach, with automatic cable
equalization for different lengths of cable
• Performance optimized for 125Mb/s, 270Mb/s,
1.485Gb/s, and 2.97Gb/s. Typical equalized length of
Belden 1694A cable up to:
200m at 2.97Gb/s
280m at 1.485Gb/s
500m at 270Mb/s
• 1.8V core power supply
• Typical power consumption of 84mW when
DC-coupled at 1.2V with OUTPUT_SWING = 0011b
(see Table 4-2)
• Ultra-low power mode for shorter cable reach
applications
• Upstream launch swing compensation from 250mVppd
to 1Vppd in approximately 50mVppd steps (Default
750mVppd)
• Auto/Manual bypass (useful for low data rates with
slow rise/fall times)
• Robust, noise-immune signal detection with squelch
threshold adjustment
• Auto/Manual control of SLEEP/MUTE/DISABLE OUTPUT
modes
• Data Rate detection and indication
<MADI, MADI, SD, HD, 3G differentiation
• Digital cable length indication (CLI)
• Differential output supports DC-coupling from
1.2V to 2.5V CML logic and AC-coupling for other logic
families
• Programmable/Rate-dependent output de-emphasis
level and delay
• Host interface for status and control
• 3kV HBM ESD protection on all pins
• Wide operating temperature range of -40ºC to +85ºC
• Small footprint QFN–COL package
(16-pin, 4mm x 4mm)
• Pb-free and RoHS compliant
• Pin-compatible with the GS6140
Applications
• SMPTE ST 424, SMPTE ST 292, SMPTE ST 259 and AES10
coaxial cable serial digital interfaces
Description
The GS3140 is a high-speed BiCMOS device designed to
equalize and restore signals received over cable.
The device is designed to support SMPTE ST 424, SMPTE ST
292, SMPTE ST 259 and AES10 (MADI), and it is optimized
for performance at 125Mb/s, 270Mb/s, 1.485Gb/s, and
2.97Gb/s.
The device supports MADI serial signals at 125Mb/s with
peak-to-peak launch amplitude between 300mVppd and
600mVppd (with AES10 spec rise and fall times) and
800mVppd±10% (with SD-SDI rise and fall times).
The GS3140 features DC restoration to compensate for the
DC content of SMPTE pathological signals.
Loss of Signal (LOS) is detected when the input carrier is lost
or signal amplitude falls below a programmable threshold.
This is further processed by a filter programmable up to
1.6s before LOS status is asserted. The device can be
programmed to automatically sleep/mute/disable the
output on loss of signal.
An interrupt pin (INT) indicates LOS by default, and can be
programmed to signal various other statuses.
When the BYPASS control bit is set, the equalizing and DC
restore stages are disengaged. This is useful for signals
launched at the source with low data rates and/or slow rise
and fall times.
GS3140
Final Data Sheet
PDS-060939
Rev.1
May 2015
www.semtech.com
1 of 40
Semtech
Proprietary & Confidential
1 page  
1. Pin Out
1.1 GS3140 Pin Assignment
VCC_A
SDI
SDI
VEE_A
16 15 14 13
1 12
2 GS3140 11
16-pin QFN–COL
3 (top view) 10
49
5 6 78
VCC_O
DDO
DDO
VEE_O
Figure 1-1: GS3140 Pin Out
1.2 GS3140 Pin Descriptions
Table 1-1: GS3140 Pin Descriptions
Pin Number
Name
Type
1
VCC_A
Power
2, 3
SDI, SDI
Input
4
VEE_A
Power
5, 6
AGC, AGC
Analog I/O
7
SDIN
Digital Input
8
SCLK
Digital Input
9
VEE_O
Power
10, 11
12
DDO, DDO
VCC_O
Output
Power
Description
Most positive power supply connection for the input buffer and core.
Connect to 1.8V.
Serial digital differential input.
Most negative power supply connection for the input buffer and core.
Connect to GND.
External Automatic Gain Control capacitor.
Host Interface Serial Data Input.
Host Interface Serial Clock Input.
Most negative power supply connection for the output buffers, digital
IO and digital circuits.
Connect to GND.
Serial digital differential output.
Most positive power supply connection for the output buffer.
Connect to 1.2V - 2.5V.
GS3140
Final Data Sheet
PDS-060939
Rev.1
May 2015
www.semtech.com
5 of 40
Semtech
Proprietary & Confidential
5 Page 
3. Input/Output Circuits
VCC_A
SDI
VCC_A
1kΩ
2kΩ 2kΩ
RC RC
3.5kΩ
VCC_A
SDI
Figure 3-1: Serial Data Input
VCC_O
VCC_O
VCC_O
DDO
50Ω
50Ω
DDO
Figure 3-3: Serial Data Output
VCC_D VCC_D
VCC_D
100kΩ
CS
VCC_A
VCC_A
AGC AGC
250Ω 500pF 250Ω
Figure 3-2: AGC, AGC
VCC_D
VCC_D
SDIN,
SCLK
100kΩ
Figure 3-4: SDIN and SCLK
VCC_D VCC_D
SDOUT,
INT
Figure 3-5: CS
Figure 3-6: SDOUT and INT
GS3140
Final Data Sheet
PDS-060939
Rev.1
May 2015
www.semtech.com
11 of 40
Semtech
Proprietary & Confidential
11 Page | ||
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| PDF Descargar | [ Datasheet GS3140.PDF ] | |
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