SA5214 Datasheet, PDF (2/10 Pages) NXP Semiconductors – Postamplifier with link status indicator

Philips Semiconductors
Postamplifier with link status indicator
Product specification
SA5214
DESCRIPTION
The SA5214 is a 75MHz postamplifier system designed to accept
low level high-speed signals. These signals are converted into a
TTL level at the output. The SA5214 can be DC coupled with the
previous transimpedance stage using SA5210, SA5211 or SA5212
transimpedance amplifiers. This “system on a chip” features an
auto-zeroed first stage with noise shaping, a symmetrical limiting
second stage, and a matched rise/fall time TTL output buffer. The
system is user-configurable to provide noise filtering, adjustable
input thresholds and hysteresis. The threshold capability allows the
user to maximize signal-to-noise ratio, insuring a low Bit Error Rate
(BER). An Auto-Zero loop can be used to minimize the number of
external coupling capacitors to one. A signal absent flag indicates
when signals are below threshold. Additionally, the low signal
condition forces the overall TTL output to a logical Low level. User
interaction with this “jamming” system is available. The SA5214 is
packaged in a standard 20-pin surface-mount package and typically
consumes 42mA from a standard 5V supply. The SA5214 is
designed as a companion to the SA5211/5212 transimpedance
amplifiers. These differential preamplifiers may be directly coupled
to the post-amplifier inputs. The SA5212/5214 or SA5211/5214
combinations convert nanoamps of photodetector current into
standard digital TTL levels.
APPLICATIONS
• Fiber optics
• Communication links in Industrial and/or Telecom environment
with high EMI/RFI
• Local Area Networks (LAN)
• Metropolitan Area Networks (MAN)
• Synchronous Optical Networks (SONET)
• RF limiter
PIN CONFIGURATION
D¹ Package
LED 1
C_PKDET 2
THRESH ³
GND_A ⁴
FLAG 5
JAM 6
V_CCD ⁷
V_CCA ⁸
GND_D ⁹
V_OUT ¹⁰
20 IN_1B
19 IN_1A
18 _CAZP
17 C_AZN
16 _OUT1B
15 IN_2B
14 _OUT1A
13 IN_2A
12 R_HYST
11 _RPKDET
NOTE:
TOP VIEW
1. SOL – Released in large SO package only.
SD00349
Figure 1. Pin Configuration
FEATURES
• Postamp for the SA5211/5212 preamplifier family
• Wideband operation: typical 75MHz (100MBaud NRZ)
• Interstage filtering/equalization possible
• Single 5V supply
• Low signal flag
• Low signal output disable
• Link status threshold and hysteresis programmable
• LED driver (normally ON with above threshold signal)
• Fully differential for excellent PSRR
• Auto-zero loop for DC offset cancellation
• 2kV ElectroStatic Discharge (ESD) protection
ORDERING INFORMATION
DESCRIPTION
20-Pin Plastic Small Outline Large (SOL) Package
TEMPERATURE RANGE
-40°C to +85°C
ORDER CODE
SA5214D
DWG #
SOT163-1
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
V_CCA
V_CCD
T_A
T_J
T_STG
P_D
V_IJ
Power supply
Power supply
Operating ambient temperature range
Operating junction temperature range
Storage temperature range
Power dissipation
Jam input voltage
RATING
+6
+6
-40 to +85
-55 to +150
-65 to +150
300
-0.5 to 5.5
UNIT
V
V
°C
°C
°C
mW
V
1998 Oct 07
2
853-1657 20142