Datasheet SA5217D Datasheet (Philips)

INTEGRATED CIRCUITS

SA5217

Postamplifier with link status indicator

Product specification
Replaces datasheet NE/SA5217 of 1995 Apr 26
IC19 Data Handbook

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1998 Oct 07

Philips Semiconductors Product specification

SA5217Postamplifier with link status indicator

DESCRIPTION

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.

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 2

23

-1 pseudo random bit stream

PIN CONFIGURATION

D1 Package

LED

1

GND

FLAG

JAM

V

CCD

V

CCA

GND

V

OUT

2

3

4

A

5

6

7

8

9

D

10

C

PKDET

THRESH

NOTE:

1. SOL - Released in large SO package only.

20

19

18

17

16

15

14

13

12

11

IN

1B

IN

1A

C

AZP

C

AZN

OUT

2B

IN

8B

OUT

2A

IN

8A

R

HYST

R

PKDET

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

ORDERING INFORMATION

DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG #

20-Pin Plastic Small Outline Large (SOL) Package -40 to +85°C SA5217D SOT163-1

ABSOLUTE MAXIMUM RATINGS

SYMBOL PARAMETER SA5214 UNIT

V

CCA

V

CCD

T

A

T

J

T

STG

P

D

V

IJ

1998 Oct 07 853-1658 20141

Power supply +6 V
Power supply +6 V
Operating ambient temperature range -40 to +85 °C
Operating junction temperature range -55 to +150 °C
Storage temperature range -65 to +150 °C
Power dissipation 1.4 W
Jam input voltage -0.5 to 5.5 V

2

Philips Semiconductors Product specification

SA5217Postamplifier with link status indicator

PIN DESCRIPTIONS

PIN

SYMBOL DESCRIPTION

NO.

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 C

PKDET

3 THRESH Peak detector threshold resistor. The value of this resistor determines the threshold level of the peak detector.
4 GND
5 FLAG Peak detector digital output. When this output is LOW, there is data present above the threshold. This pin is normally

6 JAM Input to inhibit data flow. Sending the pin HIGH forces TTL DATA OUT ON, Pin 10, LOW. This pin is normally connected

7 V

CCD

8 V

CCA

9 GND

10 V

OUT

11 R

PKDET

12 R

HYST

13 IN

8A

14 OUT
15 IN

8B

16 OUT
17 C

AZN

18 C

AZP

19 IN

1A

20 IN

1B

Capacitor for the peak detector. The value of this capacitor determines the detector response time to the signal, supple­menting the internal 10pF capacitor.

Device analog ground pin.

A

connected to the JAM pin and has a TTL fanout of two.

to the FLAG pin and is TTL-compatible.
Power supply pin for the digital portion of the chip.
Power supply pin for the analog portion of the chip.
Device digital ground pin.

D

TTL output pin with a fanout of five.
Peak detector current resistor. The value of this resistor determines the amount of discharge current available to the

peak detector capacitor, C

PKDET

.
Peak detector hysteresis resistor. The value of this resistor determines the amount of hysteresis in the peak detector.
Non-inverting input to amplifier A8.
Non-inverting output of amplifier A2.

2A

Inverting input to amplifier A8.
Inverting output of amplifier A2.

2B

Auto-Zero capacitor pin (Negative terminal). The value of this capacitor determines the low-end frequency response of
the preamp A1.

Auto-Zero capacitor pin (Positive terminal). The value of this capacitor determines the low-end frequency response of the
preamp A1.

Non-inverting input of the preamp A1.
Inverting input of the preamp A1.

BLOCK DIAGRAM

R

PKDET

1998 Oct 07

C

C

IN

IN

AZP
AZN

1B

1A

V

CCA

87

20

A1 A2

19

18

17

11

9

43

GNDAGND

THRESH

D

V

OUT2AOUT

CCD

GATED AMP

PEAK DETECT

A3

2

C

PKDET

Figure 2. Block Diagram

3

2B

161514

A6

A4

A7

HYSTERESIS

IN8BIN

8A

13

SCHMITT TRIGGER

A8

OUTPUT DISABLE

A5

LED DRIVER

12

R

HYST

10

6

5

1

SD00355

V

OUT

JAM

FLAG

LED

Philips Semiconductors Product specification

SYMBOL

PARAMETER

TEST CONDITIONS

UNIT

SA5217Postamplifier with link status indicator

RECOMMENDED OPERATING CONDITIONS

SYMBOL PARAMETER RATING UNIT

V

CCA

V

CCD

T

A

T

J

P

D

DC ELECTRICAL CHARACTERISTICS

Min and Max limits apply over the operating temperature range at V

= V

CCA
CCD

V

I1

V

O2

I8L
I8H
OH

OL

I

OH

I

OL

I

OS

IHJ

ILJ

I

IHJ

I

ILJ

OHF

OLF

OHF

OLF
SCF

= +5.0V and T

CCD

V

CCA

V

THRESH

V

RPKDET

V

I
I

V
V
V

V

RHYST

V

V

V
V

I
I
I

I

LEDH

Power supply 4.5 to 5.5 V
Power supply 4.5 to 5.5 V
Ambient temperature range -40 to +85 °C
Operating junction temperature range -40 to +110 °C
Power dissipation 300 mW

= V

= +5.0V unless otherwise specified. Typical data applies at

CCD

= 25°C.

A

CCA

LIMITS

Min Typ Max

Analog supply current 30 41.2 mA
Digital supply current (TTL, Flag, LED) 10 13.5 mA
A1 input bias voltage (A,B inputs) 3.08 3.4 3.70 V
A1 output bias voltage (A,B outputs) 3.10 3.8 4.50 V
A8 input bias voltage Low (A,B inputs) 3.40 3.55 3.68 V
A8 input bias voltage High (A,B inputs) 3.68 3.91 4.12 V
High-level TTL output voltage IOH=-200µA 2.4 3.4 V
Low-level TTL output voltage IOL=8mA 0.3 0.4 V
High-level TTL output current V
Low-level TTL output current V
Short-circuit TTL output current V

=2.4V -40 -24.4 mA

OUT

=0.4V 7.0 30 mA

OUT

=0.0V -95 mA

OUT

Threshold bias voltage Pin 3 Open 0.75 V
RPKDET Pin 11 Open 0.72 V
RHYST bias voltage Pin 12 Open 0.72 V
High-level jam input voltage 2.0 V
Low-level jam input voltage 0.8 V
High-level jam input current VIJ=2.7V 30 µA
Low-level jam input current VIJ=0.4V -485 -240 µA
High-level flag output voltage IOH=-80µA 2.4 3.8 V
Low-level flag output voltage IOL=3.2mA 0.33 0.4 V
High-level flag output current V
Low-level flag output current V
Short-circuit flag output current V
LED ON maximum sink current V

=2.4V -18 -5 mA

OUT

=0.4V 3.25 10 mA

OUT

=0.0V -61 -40 -26 mA

OUT

=3.0V 8 22 80 mA

LED

1998 Oct 07

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Philips Semiconductors Product specification

SYMBOL

PARAMETER

TEST CONDITIONS

UNIT

PP

PRBS

2

23

1

mV

V

A

mV

THR

PP

SA5217Postamplifier with link status indicator

AC ELECTRICAL CHARACTERISTICS

Min and Max limits apply over the operating temperature range at V

= V

CCD

= +5.0V and T

Maximum operating frequency Test circuit 60 75 MHz
Maximum Functional A1 input signal (single en-

ded)

V

CCA

f

OP

V

INH

= 25°C.

A

Minimum Functional A1 input signal (single-en­ded)

Minimum Functional A1 input signal (differential) 3

V

INL

Minimum input sensitivity for output BER ≤ 10

–9

(single-ended)
Minimum input sensitivity for output BER ≤ 10

–9

(differential)
R
C
R
C
R
C

IN1
IN1
IN8
IN2
OUT2
OUT2

Input resistance (differential at IN1) PRBS = 223–1 1200 Ω

Input capacitance (differential at IN1) 2 pF

Input resistance (differential at IN2) 2000 Ω

Input capacitance (differential at IN2) 2 pF

Output resistance (differential at OUT2) 25 Ω

Output capacitance (differential at OUT2) 2 pF

Hysteresis voltage range (single-ended)

HYS

V

THR

Hysteresis voltage range (differential)

Threshold voltage (single-ended)

Threshold voltage (differential) R
t

TLH

t

THL

t

RFD

t

PWD

TTL Output Rise Time 20% to 80% Test Circuit 1.3 ns

TTL Output Fall Time 80% to 20% Test Circuit 1.2 ns

t

mismatch 0.1 ns

TLH/tTHL

Pulse width distortion of output

CCA

Distortion =

= V

= +5.0V unless otherwise specified. Typical data applies at

CCD

LIMITS

Min Typ Max

Test Circuit 1.6 V

Test CIrcuit

6

9

=

–

4.5

Test circuit, TA = 25°C

R

=5k R

RHYST

THRESH

(FLAG Low) Test circuit,

@ 50MHz

=4k R

RHYST

50mV

THRESH

, 1010. . .input

P-P

T

 T

H

TH T

L
L

=33k

=33k 9.5

2

10

10

5

19

TBD %

mV

mV

P-P

P-P

P-P

P-P

P-P

1998 Oct 07

100µH

100µH

V
+5V

CC

0.1µF

10µF

125

33k

1

LED

10

2
3
4
5
6
7
8
9

15pF

C

PKDET

THRESH
GND

A

FLAG
JAM

V

CCD

V

CCA

GND

D

V

OUT

V

0.1µF

OUT

Figure 3. AC Test Circuit

NE5217

OUT

OUT

R

R

PKDET

400

5

IN

1B

IN

1A

C

AZP

C

AZN

2B

IN

8B
2A

IN

8A

HYST

0.1µF

0.1µF

4k

0.1µF

25

50

V

IN

SD00356

20
19
18
17

0.1µF

16
15

0.1µF

14
13
12
11

10k

Philips Semiconductors Product specification

SA5217Postamplifier with link status indicator

TYPICAL PERFORMANCE CHARACTERISTICS

Analog Supply Current vs Temperature Digital Supply Current vs Temperature

36

12.0

34

VCC = 5.25V

11.5

32

VCC = 5.00V

30

28

ANALOG SUPPLY CURRENT (mA)

26

24

–60 –40 –20 0 20 40 60 80 100 120

TEMPERATURE (°C)

VCC = 4.75V

Figure 4. Typical Performance Characteristics

11.0

VCC = 5.25V

10.5

10.0

DIGITAL SUPPLY CURRENT (mA)

9.5

9.0
–60 –40 –20 0 20 40 60 80 100 120

TEMPERATURE (°C)

VCC = 5.00V

VCC = 4.75V

SD00357

1998 Oct 07

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Philips Semiconductors Product specification

SA5217Postamplifier with link status indicator

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

Threshold vs R

45

40

35

P–P

30

25

THRESHOLD (mV )

20

15

Hysteresis vs R

16

14

12

P–P

10

HYST (mV )

8

6

4

2

10 20 30 40 50

5k

6k

10 20 30 40 50

THRESH

(Driven Single Ended)

V

= 5V

CC

T

= 27°C

A

F = 60MHz

3k

2k

for Different Values of R

THRESH

(Driven Single Ended)

2k

3k

4k

R

for Different Values of R

5k4k

R

THRESH

THRESH

6k

(kΩ)

(kΩ)

Figure 5. Typical Performance Characteristics (cont)

HYST

V

= 5V

CC

T

= 27

A

F = 60MHz

HYST

On/Off Voltage vs R

50

C

°

40

30

IN P–P

V (mV )

20

10

0

10 20 30 40 50

OFF

(Driven Single Ended)

THRESH

ON

R

THRESH

(kΩ)

V

= 5V

CC

T

= 27°C

A

F = 60MHz
R

HYST

= 4k

Hysteresis and Forward Active Region

5

V

IN

HYS

(mV

R
R

P-P

V

4

OFF

3

2

FLAG (V)

1

0N

0

0 5 10 15 20 25 30

IN1

V

THRESH

= 4kΩ

HYST

V

THR

FORWARD

)

= 33kΩ

ACTIVE

REGION

(shaded)

SD00358

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.

Threshold voltage and hysteresis voltage range are adjustable with
resistors R
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

THRESH

and R

. The typical values given in the data

HYST

input signal level, V
the graph. Such parts may require adjustment of R

. This condition is shown by the dotted line in

IN1

THRESH

important to guarantee that an output signal is present for the full
hysteresis range. If this is not important, R

THRESH

may be adjusted

to give a FLAG Low for lower level input signals.
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.

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

if it is

Philips Semiconductors Product specification

SA5217Postamplifier with link status indicator

+V

CC

47µF

C1

GND

10µH

L3

10µH

L2

C13
10µF

C15

10µF

R2

220

C11

R3
33k

C12

.01µF

.01µF

D1

LED

100pF

C14

V

OUT

LED

1

C

2

PKDET

THRESH

3

GND

A

4

FLAG

5

JAM

6

V

CCD

7

V

CCA

8

GND

D

9

TTL

10 11

OUT

(TTL)

OUT

NE5217

OUT

R

R

PKDET

C2

IN

1B

IN

1A

C

AZP

C

AZN

2B

IN

8B

2A

IN

8A

HYST

.01µF

L1

10µH

C5

10µF

R1
100

C3

1.0µF

.01µF

BPF31

OPTICAL

INPUT

C6

C7

20

19

18

17

16

15

14

13

12

R5
10k

100pF

C8

0.1µF

C9

0.1µF

C10

0.1µF

GND

GND

9

GND

10

GND

11

12

OUT

1

13

GND

OUT

14

2

R4
4k

V

V

NE5210

CC1

CC2

NC

I

NC

GND

GND

78

C4

6

.01µF

5

IN

4

3

2

1

NOTE:
THE NE5210/NE5217 combination can operate at data rates in excess of 100Mb/s NRZ

Figure 6. A 50Mb/s Fiber Optic Receiver

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.

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

SD00359

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.

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.

8

Philips Semiconductors Product specification

SA5217Postamplifier with link status indicator

THRESH

GNDA

FLAG

JAM

C

PKDET

3

4

5

6

LED

2

1

IN

1B

20

IN

1A

19

18

C

AZP

17

C

AZN

16

OUT

2B

IN

15

8B

V

CCD

V

CCA

ECN No.: 05379
1992 Jan 27

OUT

R

HYST

14

7

8

910

GNDD

V

OUT

11 12

R

PKDET

13

2A

IN

8A

SD00491

Figure 7. SA5217 Bonding Diagram

1998 Oct 07

9

Philips Semiconductors Product specification

SA5217Postamplifier with link status indicator

SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1

1998 Oct 07

10

Philips Semiconductors Product specification

SA5217Postamplifier with link status indicator

NOTES

1998 Oct 07

11

Philips Semiconductors Product specification

SA5217Postamplifier with link status indicator

Data sheet status

Data sheet
status

Objective
specification

Preliminary
specification

Product
specification

Product
status

Development

Qualification

Production

Definition

This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.

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.

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]

[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.

Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone [phone]

 Copyright Philips Electronics North America Corporation 1998

All rights reserved. Printed in U.S.A.

Date of release: 10-98

Document order number: 9397 750 04627




1998 Oct 07

12