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