INTEGRATED CIRCUITS SA5214 Postamplifier with link status indicator Product specification Replaces datasheet NE/SA5214 of 1995 Apr 26 IC19 Data Handbook 1998 Oct 07 Philips Semiconductors Product specification Postamplifier with link status indicator DESCRIPTION SA5214 PIN CONFIGURATION 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. D1 Package 1 20 IN1B CPKDET 2 19 IN1A THRESH 3 18 CAZP GNDA 4 17 CAZN LED FLAG 5 16 OUT 1B JAM 6 VCCD 15 IN2B 7 14 OUT 1A VCCA 8 13 IN2A GNDD 9 12 RHYST VOUT 10 11 R PKDET TOP VIEW NOTE: 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 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 ORDERING INFORMATION DESCRIPTION 20-Pin Plastic Small Outline Large (SOL) Package TEMPERATURE RANGE ORDER CODE DWG # -40°C to +85°C SA5214D SOT163-1 ABSOLUTE MAXIMUM RATINGS SYMBOL PARAMETER RATING UNIT VCCA Power supply +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 TSTG Storage temperature range -65 to +150 °C PD Power dissipation 300 mW VIJ Jam input voltage -0.5 to 5.5 V 1998 Oct 07 2 853-1657 20142 Philips Semiconductors Product specification Postamplifier with link status indicator SA5214 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 IN2A Non-inverting input to amplifier A2. 14 OUT1A Non-inverting output of amplifier A1. 15 IN2B Inverting input to amplifier A2. 16 OUT1B Inverting output of amplifier A1. 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 OUT1A IN1B IN1A CAZP CAZN OUT1B IN2B IN2A 14 16 15 13 VCCD 7 GATED AMP 20 19 A1 VCCA 8 OUTPUT BUFFER 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 2 THRESH CPKDET Figure 2. Block Diagram 1998 Oct 07 3 12 RHYST SD00350 Philips Semiconductors Product specification Postamplifier with link status indicator SA5214 RECOMMENDED OPERATING CONDITIONS SYMBOL RATING UNIT VCCA Supply voltage PARAMETER 4.75 to 5.25 V VCCD Power supply 4.75 to 5.25 V °C TA Ambient temperature range -40 to +85 TJ Operating junction temperature range -40 to +110 °C PD Power dissipation 250 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 (+/- inputs) 3.08 3.4 3.70 V VO1 A1 output bias voltage (+/- outputs) 3.10 3.8 4.50 V AV1 A1 DC gain (without Auto-Zero) A1PSRR A1 PSRR (vCCA, VCCD) A1CMRR A1 CMRR VI2 A2 input bias voltage (+/- inputs) VOH High-level TTL output voltage IOH=-200µA 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 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 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 30 dB VCCA=VCCD=4.75 to 5.25V 60 dB ∆VCM=200mV 60 dB 3.56 3.7 2.4 3.4 7.0 3.86 V 2.0 V VIJ=2.7V 4 V 0.8 V 30 µA µA V mA Philips Semiconductors Product specification Postamplifier with link status indicator SA5214 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 TEST CONDITIONS LIMITS Max UNIT Min Typ 60 75 MHz fOP Maximum operating frequency Test circuit BWA1 Small signal bandwidth (differential OUT1/IN1) Test circuit 75 MHz VINH Maximum Functional A1 input signal (single ended) Test Circuit 1.6 VP-P VINL Minimum Functional A1 input signal (single ended) Test CIrcuit1 12 mVP-P RIN1 Input resistance (differential at IN1) 1200 Ω CIN1 Input capacitance (differential at IN1) 2 pF RIN2 Input resistance (differential at IN2) 1200 Ω CIN2 Input capacitance (differential at IN2) 2 pF ROUT1 Output resistance (differential at OUT1) 25 Ω COUT1 Output capacitance (differential at OUT1) 2 pF VHYS Hysteresis voltage Test circuit 3 mVP-P VTHR Threshold voltage range (FLAG ON) Test circuit, @ 50MHz RRHYST=5k RTHRESH=47k 12 mVP-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 0.1 ns tRFD tPWD tTLH/tTHL mismatch Pulse width distortion of output 50mVP-P, 1010. . .input Distortion= 102 TH-TL TH+TL 2.5 2.5 % NOTES: 1. The SA5214 is capable of detecting a much lower input level. Operation under 12mVP-P cannot be guaranteed by present day automatic testers. 1998 Oct 07 5 Philips Semiconductors Product specification Postamplifier with link status indicator VCC +5V SA5214 NE5214 0.1µF 125 1 2 3 4 0.1µF 47k 5 6 7 8 9 10 100µH 100µH 0.1µF 20 LED IN1B 19 CPKDET IN1A 18 THRESH CAZP 17 GNDA CAZN 16 FLAG OUT1B 15 JAM IN2B 14 VCCD OUT1A 13 VCCA IN2A 12 GNDD RHYST 11 VOUT RPKDET VIN 0.1µF 50 0.1µF 25 5k 10k 10µF 400 VOUT 15pF SD00351 Figure 3. AC Test Circuit TYPICAL PERFORMANCE CHARACTERISTICS Analog Supply Current vs Temperature Digital Supply Current vs Temperature 12.0 34 DIGITAL SUPPLY CURRENT (mA) ANALOG SUPPLY CURRENT (mA) 36 VCC = 5.25V 32 VCC = 5.00V 30 VCC = 4.75V 28 11.5 11.0 VCC = 5.25V 10.5 VCC = 5.00V 10.0 9.5 26 VCC = 4.75V 24 –60 –40 –20 0 20 40 60 80 100 9.0 –60 120 –40 –20 0 22 20 40 60 80 100 120 TEMPERATURE (°C) TEMPERATURE (°C) Threshold Voltage vs RTHRESH Hysteresis Voltage vs RHYST 4 RHYST = 5k 20 RTHRESH = 47Ω HYSTERSIS (mVp–p) THRESHOLD (mVp–p) 21 19 18 17 16 15 3 2 1 14 13 12 20 30 40 0 50 3 4 RTHRESH (kΩ) Figure 4. Typical Performance Characteristics 1998 Oct 07 5 RHYST (kΩ) 6 6 7 SD00352 Philips Semiconductors Product specification Postamplifier with link status indicator SA5214 +VCC GND 47µF C1 C2 .01µF L1 µ 10 H D1 LED C7 1 LED IN1B 20 IN1A 19 8 GND VCC 7 9 GND VCC 6 10 GND NC 5 11 GND IIN 4 OUT1B 16 12 OUT NC 3 IN2B 15 13 GND GND 2 OUT1A 14 14 OUT GND 1 IN2A 13 RHYST 12 100pF C9 CPKDET 3 THRESH 4 GNDA 5 FLAG 100pF R3 47k L2 10µH 6 C10 10µF L3 10µH C12 10µF C11 .01µF C13 .01µF JAM 7 VCCD 8 VCCA 9 GNDD 10 TTLOUT C8 CAZP 18 CAZN NE5214 2 17 0.1µF NE5211 R2 220 C4 .01µF R1 100 C5 1.0µF C3 .01µF 10µF C6 BPF31 OPTICAL INPUT RPKDET 11 R4 5.1k VOUT (TTL) NOTE: The NE5211/NE5214 combination can operate at data rates in excess of 100Mb/s NRZ. SD00353 Figure 5. A 50Mb/s Fiber Optic Receiver THEORY OF OPERATION AND APPLICATION INFORMATION Operation, please refer to paper titled “A Low Cost 100 MBaud Fiber-Optic Receiver” by W. Mack et al. The SA5214 postamplifier system is a highly integrated chip that provides up to 60dB of gain at 60MHz, to bring mV level signals up to TTL levels. A typical application of the SA5214 postamplifier is depicted in Figure 5. 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 50 Mb/s Non Return to Zero (NRZ) bit stream. The SA5214 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 to the “JAM” input; this forces the TTL data OUT into a LOW state when no signal is present at the input. 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. For more information on this application, please refer to AB 1432. 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. An auto zero loop allows the SA5214 to be directly connected to a transimpedance amplifier such as the SA5210, SA5211, or SA5212 without coupling capacitors. This auto-zero loop cancels the transimpedance amplifier’s DC offset, the SA5214 A1 offset, and the data-dependent offset in the PIN diode/transimpedance amplifier combination. For more information on the SA5214 Theory of 1998 Oct 07 7 Philips Semiconductors Product specification Postamplifier with link status indicator SA5214 Semiconductors assumes no liability for device functionality or performance of the die or systems 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 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. 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. Since Philips Semiconductors has no control of third party procedures in the handling or packaging of die, Philips IN1B LED CPKDET IN1A CAZP THRESH 1 2 GNDA 20 19 3 ÇÇÇÇÇÇ ÇÇÇÇÇÇ ÇÇÇÇÇÇ ÇÇÇÇÇÇ ÇÇÇÇÇÇ ÇÇÇÇÇÇ ÇÇÇÇÇÇ 4 FLAG 5 6 JAM 7 17 OUT1B 16 15 IN2B 14 8 VCCD CAZN 18 13 9 10 11 OUT1A 12 VCCA IN2A RHYST GNDD RPKDET VOUT ECN No.: 94620 1988 Sep 28 SD00490 Figure 6. SA5214 Bonding Diagram 1998 Oct 07 8 Philips Semiconductors Product specification Postamplifier with link status indicator SA5214 SO20: plastic small outline package; 20 leads; body width 7.5 mm 1998 Oct 07 9 SOT163-1 Philips Semiconductors Product specification Postamplifier with link status indicator SA5214 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 10 9397 750 04626