PHILIPS SA5217D

INTEGRATED CIRCUITS
SA5217
Postamplifier with link status indicator
Product specification
Replaces datasheet NE/SA5217 of 1995 Apr 26
IC19 Data Handbook
1998 Oct 07
Philips Semiconductors
Product specification
Postamplifier with link status indicator
DESCRIPTION
SA5217
PIN CONFIGURATION
The SA5217 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 SA5217 can be DC coupled with the
previous transimpedance stage using SA5210, SA5211 or SA5212A
transimpedance amplifiers. The main difference between the
SA5217 and the SA5214 is that the SA5217 does not make the
output of A1 and input of A2 accessible; instead, it brings out the
output of A2 and the input of A8 thus activating the on-chip Schmitt
trigger function by connecting two external capacitors. The result is
that a much longer string of 1s and 0s, in the bit stream, can be
tolerated. 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 adjustable input threshold and
hysteresis. The threshold capability allows the user to maximize
signal-to-noise ratio, thereby insuring a low Bit Error Rate (BER).
An auto-zero loop can be used to replace two input coupling
capacitors with a single Auto Zero (AZ) capacitor. A signal absent
flag indicates when signals are below threshold. The low signal
condition forces the TTL output to the last logic state. User
interaction with this ”jamming” system is available. The SA5217 is
packaged in a standard 20-pin surface-mount package and typically
consumes 40mA from a standard 5V supply. The SA5217 is
designed as a companion to the SA5211/5212A and SA5210
transimpedance amplifiers. These differential preamplifiers may be
directly coupled to the postamplifier inputs. The SA5210/5217,
SA5211/5217 or SA5212A/5217 combinations convert nanoamps of
photodetector current into standard digital TTL levels.
D1 Package
LED
1
20
IN1B
CPKDET
2
19
IN1A
THRESH
3
18
CAZP
GNDA
4
17
CAZN
FLAG
5
16
OUT2B
JAM
6
15
IN8B
VCCD
7
14
OUT2A
VCCA
8
13
IN8A
GNDD
9
12
RHYST
VOUT
10
11
RPKDET
NOTE:
1. SOL - Released in large SO package only.
SD00354
Figure 1. Pin Configuration
FEATURES
• Postamp for the SA5211/5212A. SA5210 preamplifier family
• Wideband operation: typical 75MHz (150MBaud NRZ)
• Interstage filtering/equalization possible
• Single 5V supply
• Low signal flag
• 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
APPLICATIONS
• Fiber optics
• Communication links in Industrial and/or Telecom environment
with high EMI/RFI
• Local Area Networks (LAN)
• Synchronous Optical Networks (SONET) STS-1
• RF limiter
• Good for 223 -1 pseudo random bit stream
ORDERING INFORMATION
DESCRIPTION
20-Pin Plastic Small Outline Large (SOL) Package
TEMPERATURE RANGE
ORDER CODE
DWG #
-40 to +85°C
SA5217D
SOT163-1
ABSOLUTE MAXIMUM RATINGS
SYMBOL
SA5214
UNIT
VCCA
Power supply
PARAMETER
+6
V
VCCD
Power supply
+6
V
TA
Operating ambient temperature range
-40 to +85
°C
TJ
Operating junction temperature range
-55 to +150
°C
Storage temperature range
-65 to +150
°C
TSTG
PD
Power dissipation
1.4
W
VIJ
Jam input voltage
-0.5 to 5.5
V
1998 Oct 07
2
853-1658 20141
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
PIN DESCRIPTIONS
PIN
NO.
SYMBOL
DESCRIPTION
1
LED
Output for the LED driver. Open collector output transistor with 125Ω series limiting resistor. An above threshold signal
turns this transistor ON.
2
CPKDET
Capacitor for the peak detector. The value of this capacitor determines the detector response time to the signal, supplementing the internal 10pF capacitor.
3
THRESH
Peak detector threshold resistor. The value of this resistor determines the threshold level of the peak detector.
4
GNDA
Device analog ground pin.
5
FLAG
Peak detector digital output. When this output is LOW, there is data present above the threshold. This pin is normally
connected to the JAM pin and has a TTL fanout of two.
6
JAM
Input to inhibit data flow. Sending the pin HIGH forces TTL DATA OUT ON, Pin 10, LOW. This pin is normally connected
to the FLAG pin and is TTL-compatible.
7
VCCD
Power supply pin for the digital portion of the chip.
8
VCCA
Power supply pin for the analog portion of the chip.
9
GNDD
Device digital ground pin.
10
VOUT
TTL output pin with a fanout of five.
11
RPKDET
Peak detector current resistor. The value of this resistor determines the amount of discharge current available to the
peak detector capacitor, CPKDET.
12
RHYST
Peak detector hysteresis resistor. The value of this resistor determines the amount of hysteresis in the peak detector.
13
IN8A
Non-inverting input to amplifier A8.
14
OUT2A
Non-inverting output of amplifier A2.
15
IN8B
Inverting input to amplifier A8.
16
OUT2B
Inverting output of amplifier A2.
17
CAZN
Auto-Zero capacitor pin (Negative terminal). The value of this capacitor determines the low-end frequency response of
the preamp A1.
18
CAZP
Auto-Zero capacitor pin (Positive terminal). The value of this capacitor determines the low-end frequency response of the
preamp A1.
19
IN1A
Non-inverting input of the preamp A1.
20
IN1B
Inverting input of the preamp A1.
BLOCK DIAGRAM
IN1B
IN1A
CAZP
CAZN
VCCA
VCCD
8
7
IN8B
IN8A
15
14 16
13
SCHMITT TRIGGER
GATED AMP
20
19
OUT2A OUT2B
A1
A8
A2
10
VOUT
18
A6
17
OUTPUT DISABLE
6
JAM
PEAK DETECT
RPKDET
11
5
A4
A3
A5
A7
1
FLAG
LED
LED DRIVER
HYSTERESIS
4
GNDA
9
GNDD
3
THRESH
2
CPKDET
Figure 2. Block Diagram
1998 Oct 07
3
12
RHYST
SD00355
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
RATING
UNIT
VCCA
Power supply
4.5 to 5.5
V
VCCD
Power supply
4.5 to 5.5
V
TA
Ambient temperature range
-40 to +85
°C
TJ
Operating junction temperature range
-40 to +110
°C
PD
Power dissipation
300
mW
DC ELECTRICAL CHARACTERISTICS
Min and Max limits apply over the operating temperature range at VCCA = VCCD = +5.0V unless otherwise specified. Typical data applies at
VCCA = VCCD = +5.0V and TA = 25°C.
SYMBOL
PARAMETER
TEST CONDITIONS
LIMITS
Min
Typ
Max
UNIT
ICCA
Analog supply current
30
41.2
mA
ICCD
Digital supply current (TTL, Flag, LED)
10
13.5
mA
VI1
A1 input bias voltage (A,B inputs)
3.08
3.4
3.70
V
VO2
A1 output bias voltage (A,B outputs)
3.10
3.8
4.50
V
VI8L
A8 input bias voltage Low (A,B inputs)
3.40
3.55
3.68
V
VI8H
A8 input bias voltage High (A,B inputs)
3.68
3.91
4.12
V
VOH
High-level TTL output voltage
IOH=-200µA
2.4
3.4
VOL
Low-level TTL output voltage
IOL=8mA
0.3
0.4
V
IOH
High-level TTL output current
VOUT=2.4V
-40
-24.4
mA
IOL
Low-level TTL output current
VOUT=0.4V
30
mA
IOS
Short-circuit TTL output current
VOUT=0.0V
-95
mA
VTHRESH
Threshold bias voltage
Pin 3 Open
0.75
V
VRPKDET
RPKDET
Pin 11 Open
0.72
V
VRHYST
RHYST bias voltage
Pin 12 Open
0.72
V
VIHJ
High-level jam input voltage
VILJ
Low-level jam input voltage
IIHJ
High-level jam input current
IILJ
Low-level jam input current
7.0
V
2.0
V
VIJ=2.7V
0.8
V
30
µA
µA
VIJ=0.4V
-485
-240
VOHF
High-level flag output voltage
IOH=-80µA
2.4
3.8
VOLF
Low-level flag output voltage
IOL=3.2mA
0.33
0.4
V
IOHF
High-level flag output current
VOUT=2.4V
-18
-5
mA
V
IOLF
Low-level flag output current
VOUT=0.4V
3.25
10
ISCF
Short-circuit flag output current
VOUT=0.0V
-61
-40
-26
mA
ILEDH
LED ON maximum sink current
VLED=3.0V
8
22
80
mA
1998 Oct 07
4
mA
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
AC ELECTRICAL CHARACTERISTICS
Min and Max limits apply over the operating temperature range at VCCA = VCCD = +5.0V unless otherwise specified. Typical data applies at
VCCA = VCCD = +5.0V and TA = 25°C.
SYMBOL
PARAMETER
LIMITS
TEST CONDITIONS
fOP
Maximum operating frequency
Test circuit
VINH
Maximum Functional A1 input signal (single ended)
Test Circuit
Minimum Functional A1 input signal (single-ended)
Typ
60
75
MHz
1.6
VP-P
6
Test CIrcuit
Minimum Functional A1 input signal (differential)
VINL
Max
UNIT
Min
mVP
P
P-P
3
Minimum input sensitivity for output BER ≤ 10–9
(single-ended)
9
PRBS = 223–1
1
Minimum input sensitivity for output BER ≤ 10–9
(differential)
mVP-P
4.5
PRBS = 223–1
1200
Ω
2
pF
RIN1
Input resistance (differential at IN1)
CIN1
Input capacitance (differential at IN1)
RIN8
Input resistance (differential at IN2)
2000
Ω
CIN2
Input capacitance (differential at IN2)
2
pF
ROUT2
Output resistance (differential at OUT2)
25
Ω
COUT2
Output capacitance (differential at OUT2)
2
pF
VHYS
S
VTHR
Hysteresis voltage range (single-ended)
10
Test circuit, TA = 25°C
RRHYST=5k RTHRESH=33k
Hysteresis voltage range (differential)
(FLAG Low) Test circuit,
@ 50MHz
19
RRHYST=4k RTHRESH=33k
9.5
Threshold voltage (single-ended)
Threshold voltage (differential)
5
mVP-P
mVP
P-P
P
tTLH
TTL Output Rise Time 20% to 80%
Test Circuit
1.3
ns
tTHL
TTL Output Fall Time 80% to 20%
Test Circuit
1.2
ns
tRFD
tTLH/tTHL mismatch
0.1
ns
TBD
%
tPWD
50mVP-P, 1010. . .input
TH TL 2
Distortion =
10
TH TL
Pulse width distortion of output
VCC
+5V
NE5217
0.1µF
125
33k
0.1µF
1
2
3
4
5
6
7
8
9
100µH
100µH
0.1µF
10
LED
IN1B
CPKDET IN1A
THRESH CAZP
GNDA
CAZN
FLAG
OUT2B
JAM
IN8B
VCCD
VCCA
GNDD
20
19
18
17
16
15
14
OUT2A
13
IN8A
12
RHYST
11
VIN
0.1µF
50
0.1µF
25
0.1µF
0.1µF
4k
VOUT RPKDET
10k
10µF
400
VOUT
15pF
SD00356
Figure 3. AC Test Circuit
1998 Oct 07
5
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
TYPICAL PERFORMANCE CHARACTERISTICS
Analog Supply Current vs Temperature
Digital Supply Current vs Temperature
36
VCC = 5.25V
34
11.5
DIGITAL SUPPLY CURRENT (mA)
ANALOG SUPPLY CURRENT (mA)
12.0
32
VCC = 5.00V
30
28
VCC = 4.75V
26
11.0
VCC = 5.25V
10.5
VCC = 5.00V
10.0
9.5
VCC = 4.75V
24
–60
–40
–20
0
20
40
60
80
100
9.0
–60
120
–40
–20
TEMPERATURE (°C)
0
20
40
60
80
100
120
TEMPERATURE (°C)
SD00357
Figure 4. Typical Performance Characteristics
1998 Oct 07
6
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Threshold vs RTHRESH for Different Values of RHYST
(Driven Single Ended)
On/Off Voltage vs RTHRESH (Driven Single Ended)
45
50
VCC = 5V
40
2k
F = 60MHz
35
3k
30
TA = 27°C
F = 60MHz
RHYST = 4k
40
V IN (mV P–P )
THRESHOLD (mV P–P )
VCC = 5V
TA = 27°C
4k
30
ON
20
25
OFF
10
5k
6k
20
0
10
15
10
20
30
40
20
30
50
RTHRESH (kΩ)
Hysteresis and Forward Active Region
RTHRESH = 33kΩ
VIN1
16
RHYST = 4kΩ
4
OFF
VCC = 5V
TA = 27°C
VTHR
3
4k
2k
5k
FLAG (V)
HYST (mV P–P )
F = 60MHz
12
10
50
5
Hysteresis vs RTHRESH for Different Values of RHYST
(Driven Single Ended)
14
40
RTHRESH (kΩ)
3k
FORWARD
ACTIVE
REGION
(shaded)
2
8
6
VHYS
1
6k
4
0N
0
2
10
20
30
40
0
50
5
10
15
20
VIN (mVP-P)
RTHRESH (kΩ)
25
30
SD00358
Figure 5. Typical Performance Characteristics (cont)
input signal level, VIN1. This condition is shown by the dotted line in
the graph. Such parts may require adjustment of RTHRESH if it is
important to guarantee that an output signal is present for the full
hysteresis range. If this is not important, RTHRESH may be adjusted
to give a FLAG Low for lower level input signals.
THEORY OF OPERATION AND APPLICATION
The SA5217 postamplifier is a highly integrated chip that provides
up to 60dB of gain at 60MHz, to bring mV level signals up to TTL
levels.
The SA5217 contains eight amplifier blocks (see Block Diagram).
The main signal path is made up of a cascade of limiting stages: A1,
A2 and A8. The A3-A4-A7 path performs a wideband full-wave
rectification of the input signal with adjustable hysteresis and decay
times. It outputs a TTL High on the “FLAG” output (Pin 5) when the
input is below a user adjustable threshold. An on-chip LED driver
turns the external LED to the On state when the input signal is
above the threshold. In a typical application the “FLAG” output is
tied back tot he “JAM” input; forcing the “JAM” input to TTL High will
latch the TTL Data Out at the last logical state.
An auto-zero loop allows the SA5217 to be directly connected to a
transimpedance amplifier such as the SA5210, SA5211, or
SA5212A without coupling capacitors. This auto-zero loop cancels
the transimpedance amplifier’s DC offset, the SA5217 A1 offset, and
the data-dependent offset in the PIN diode/transimpedance amplifier
combination.
A typical application of the SA5217 postamplifier is depicted in
Figure 6. The system uses the SA5211 transimpedance amplifier
which has a 28k differential transimpedance gain and a -3dB
bandwidth of 140MHz. this typical application is optimized for a
50Mb/s Non Return to Zero (NRZ) bit stream.
Threshold voltage and hysteresis voltage range are adjustable with
resistors RTHRESH and RHYST. The typical values given in the data
sheet will result in performance shown in the graph “Hysteresis and
Forward Active Region”. A minority of parts may be sensitive
enough that FLAG High (Off) occurs below the minimum functional
1998 Oct 07
As the system’s gain bandwidth product is very high, it is crucial to
employ good RF design and printed circuit board layout techniques
to prevent the system from becoming unstable.
7
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
+VCC
GND
47µF
C1
C2
.01µF
L1
10µH
D1
LED
1
LED
IN1B
20
3
THRESH
4
GNDA
5
FLAG
100pF
IN1A
19
L2
10µH
6
C13
10µF
L3
10µH
C15
10µF
C12
.01µF
C14
7
JAM
VCCD
8
VCCA
9
GNDD
10
TTLOUT
CAZN
VCC1
7
9
GND
VCC2
6
10
GND
NC
5
IIN
4
NC
3
C8
CAZP 18
NE5217
2
CPKDET
GND
8
100pF
C11
R3
33k
R1
100
C7
17
C9
OUT2B 16
IN8B
15
OUT2A
14
IN8A
13
RHYST
12
11
0.1µF
0.1µF
C10
GND
NE5210
R2
220
12
OUT1
13
GND
GND
2
14
OUT2
GND
1
C4
.01µF
C3
C5
1.0µF
.01µF
10µF
C6
BPF31
OPTICAL
INPUT
0.1µF
RPKDET 11
.01µF
R4
4k
R5
10k
VOUT (TTL)
NOTE:
THE NE5210/NE5217 combination can operate at data rates in excess of 100Mb/s NRZ
SD00359
Figure 6. A 50Mb/s Fiber Optic Receiver
utilized for wafer sawing and die pick and place into waffle pack
carriers, it is impossible to guarantee 100% functionality through this
process. There is no post waffle pack testing performed on
individual die.
For more information on this application, please refer to Application
Brief AB1432.
Die Sales Disclaimer
Due to the limitations in testing high frequency and other parameters
at the die level, and the fact that die electrical characteristics may
shift after packaging, die electrical parameters are not specified and
die are not guaranteed to meet electrical characteristics (including
temperature range) as noted in this data sheet which is intended
only to specify electrical characteristics for a packaged device.
Since Philips Semiconductors has no control of third party
procedures in the handling or packaging of die, Philips
Semiconductors assumes no liability for device functionality or
performance of the die or systems on any die sales.
Although Philips Semiconductors typically realizes a yield of 85%
after assembling die into their respective packages, with care
customers should achieve a similar yield. However, for the reasons
stated above, Philips Semiconductors cannot guarantee this or any
other yield on any die sales.
All die are 100% functional with various parametrics tested at the
wafer level, at room temperature only (25°C), and are guaranteed to
be 100% functional as a result of electrical testing to the point of
wafer sawing only. Although the most modern processes are
1998 Oct 07
8
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
LED
IN1B
CPKDET
2
20
1
THRESH
GNDA
FLAG
JAM
VCCA
3
18
4
17
CAZN
16
OUT2B
ÉÉÉÉÉÉ
ÉÉÉÉÉÉ
ÉÉÉÉÉÉ
ÉÉÉÉÉÉ
ÉÉÉÉÉÉ
ÉÉÉÉÉÉ
ÉÉÉÉÉÉ
ÉÉÉÉÉÉ
5
6
VCCD
14
13
8
9
10
11
CAZP
IN8B
OUT2A
IN8A
12
RHYST
GNDD
RPKDET
VOUT
Figure 7. SA5217 Bonding Diagram
1998 Oct 07
15
7
ECN No.: 05379
1992 Jan 27
IN1A
19
9
SD00491
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
SO20: plastic small outline package; 20 leads; body width 7.5 mm
1998 Oct 07
10
SOT163-1
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
NOTES
1998 Oct 07
11
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
Data sheet status
Data sheet
status
Product
status
Definition [1]
Objective
specification
Development
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
Preliminary
specification
Qualification
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make chages at any time without notice in order to
improve design and supply the best possible product.
Product
specification
Production
This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.
 Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
Date of release: 10-98
Document order number:
1998 Oct 07
12
9397 750 04627