OQ2538HP NXP Semiconductors, OQ2538HP Datasheet
OQ2538HP
Specifications of OQ2538HP
Available stocks
Related parts for OQ2538HP
OQ2538HP Summary of contents
Page 1
... DATA SHEET OQ2538HP; OQ2538U SDH/SONET STM16/OC48 main amplifiers Product specification Supersedes data of 1997 Nov 26 File under Integrated Circuits, IC19 INTEGRATED CIRCUITS 1998 Oct 14 ...
Page 2
... LQFP48 OQ2538U 1998 Oct 14 GENERAL DESCRIPTION The OQ2538HP is a limiting amplifier IC intended for use as the main amplifier in 2.5 Gbits/s Non-Return to Zero (NRZ) transmission systems (SDH/SONET). Comprised of four amplifier stages with a total gain of 48.5 dB, it provides for a wide input signal dynamic range at a constant CML-compatible output level ...
Page 3
... IN 6 INQ 1998 Oct AMP A AMP B AMP C reference BAND GAP voltage for all cells REF CAPA COFF COFFQ Fig.1 Block diagram. 3 Product specification OQ2538HP; OQ2538U 3 AGC 43 A AGCDC 19 LOS 18 B LOSDC 32 OUT AMP D 30 OUTQ OQ2538HP MGE745 GND ...
Page 4
... O main amplifier inverted output 17 O main amplifier output 25 O rectifier A reference output 26 A pin for connecting automatic offset control capacitor (return pin for connecting automatic offset control capacitor 4 Product specification OQ2538HP; OQ2538U DESCRIPTION pad unconnected! EE ...
Page 5
... Philips Semiconductors SDH/SONET STM16/OC48 main amplifiers handbook, full pagewidth V EE n.c. AGC GND GND INQ GND IN GND GND n. 1998 Oct OQ2538HP Fig.2 Pin configuration. 5 Product specification OQ2538HP; OQ2538U n.c. 34 GND 33 GND 32 OUT 31 GND 30 OUTQ 29 GND 28 GND 27 n. MGE744 ...
Page 6
... The last stage is an output buffer, a unity gain amplifier, with an output impedance of 100 . The total gain of the OQ2538HP amounts to 48.5 dB, thus providing a constant CML-compatible output signal over a wide input signal range. Two rectifier circuits are used to measure the input signal level ...
Page 7
... OUT and OUTQ to ground, as close as possible to the IC pins. These matching resistors will not be needed in most applications, IN however. The output circuit of the OQ2538HP is depicted in Fig.6. For more information see “Application Note AN96051” describing the OM5801 STM16 demo board. INQ ...
Page 8
... Chapter “Characteristics”. Since the network analyzer can only perform single-ended measurements, the single-ended matching scheme described above is used to match the inputs of the OQ2538HP For greater accuracy, the outputs are also matched. The gain measured with this set-up is denoted by S typical S ...
Page 9
... Vertical scale 6 dB/division. Linear frequency sweep; start: 30 kHz; stop: 6 GHz. (1) 41.603 dB; 1 GHz. (2) 38.633 dB; 3.45 GHz. (3) 41.291 dB; 2 GHz. (4) 41.386 dB; 2.5 GHz. Fig.8 S 1998 Oct 14 (2) (4) (3) characteristic, measured on the OQ2538HP test PCB Product specification OQ2538HP; OQ2538U MGM160 stop: 6 GHz ...
Page 10
... Vertical scale 200 ps/division. Linear frequency sweep; start: 30 kHz; stop: 6 GHz. (1) 832.91 ps; 1 GHz. (2) 1007.4 ps; 3.45 GHz. (3) 834 ps; 2 GHz. (4) 860.93 ps; 2.5 GHz. Fig.9 Group delay characteristic, measured on the OQ2538HP test PCB. 1998 Oct 14 (2) (4) (3) 10 Product specification OQ2538HP ...
Page 11
... K) and N measured bandwidth and expressed in dBm. in dBm For the OQ2538HP, in the differential configuration (including the 100 typical noise figure of 11 dB. While the performance of this measurement set-up cannot N match that of a dedicated noise analysis system, the o kT ...
Page 12
... This plane should be decoupled to ground. To avoid high frequency resonance, multiple bypass capacitors should not be mounted at the same location. To minimize low frequency switching noise in the vicinity of the OQ2538HP, the power supply line should be filtered once using an LC-circuit with a low cut-off frequency (see Fig.14). can be used as 12 Product specifi ...
Page 13
... Philips Semiconductors SDH/SONET STM16/OC48 main amplifiers Using alternative supply voltages Although the OQ2538HP is intended to be used with a single 4.5 V supply voltage, a slightly modified 5 V supply can also be used. By connecting a Schottky diode between the V power supply line and the IC additional 0.5 V voltage drop is obtained, bringing the supply voltage on the pins of the OQ2538HP within the specified range ...
Page 14
... THERMAL CHARACTERISTICS SYMBOL DESCRIPTION R thermal resistance from junction to solder point th(j-s) R thermal resistance from junction to ambient th(j-a) Note 1. R will be in the application from K/W, dependent on the PCB layout. th(j-a) 1998 Oct 14 OQ2538HP; OQ2538U CONDITIONS MIN. 6.0 note 1 600 2 0.1 65 CONDITIONS ...
Page 15
... V open output; note 14 15 Product specification OQ2538HP; OQ2538U MIN. TYP. 4.725 4.5 60 270 40 40 0.5 2.5 2.4 2.1 0.2 100 34 40 48.5 ...
Page 16
... EE open output note 16 input signal >2.5 mV (p-p) input signal >2.5 mV (p-p) see Fig.6 and are measured at 1 GHz (see Fig.7). Flatness deviations are within 3 dB load resistance and carry complementary signals. 16 Product specification OQ2538HP; OQ2538U MIN. TYP. MAX. UNIT 2 ...
Page 17
... C INQ INQ OQ2538HP AGC 3 AGCDC 43 100 100 LOS LOSDC V EE 100 100 nF nF Fig.14 Typical application schematic. 17 Product specification OQ2538HP; OQ2538U OQ2541HP to data and clock recovery unit DATA AND CLOCK RECOVERY OUT 32 OUTQ 30 COFF 45 100 nF COFFQ 44 REF 21 CAPA GND ...
Page 18
... LOSS OF SIGNAL DETECTION 1998 Oct 200 C INQ INQ OQ2538HP AGC 3 AGCDC 43 100 100 LOS LOSDC V EE 100 100 nF nF Fig. application schematic. 18 Product specification OQ2538HP; OQ2538U OUT 32 OUTQ 30 COFF 45 100 nF COFFQ 44 REF 21 CAPA GND V EE BAS85 10 H 5 MGM113 ...
Page 19
... BONDING PAD LOCATIONS handbook, full pagewidth V EE AGC GND GND INQ (1) 2.07 mm GND IN GND GND V EE (1) Typical value. 1998 Oct OQ2538U (1) 2.07 mm Fig.16 Bonding pad locations of OQ2538U. 19 Product specification OQ2538HP; OQ2538U n.c. 19 GND 18 GND 17 OUT 16 GND 15 OUTQ 14 GND 13 GND MGR525 ...
Page 20
... AGC +900 500 GND +900 300 GND +900 100 INQ +900 +100 GND +900 +300 IN +900 +500 GND 2 2.070 mm (4.285 Product specification OQ2538HP; OQ2538U COORDINATES PAD x 19 +900 20 +900 21 +700 22 +500 23 +300 24 +100 25 100 26 300 27 500 28 700 29 900 30 ...
Page 21
... Oct 2.5 scale (1) ( 0.27 0.18 7.1 7.1 9.15 0.5 0.17 0.12 6.9 6.9 8.85 REFERENCES JEDEC EIAJ 21 OQ2538HP; OQ2538U detail 9.15 0.75 1.0 0.2 0.12 0.1 8.85 0.45 EUROPEAN PROJECTION Product specification SOT313 (1) ( 0.95 0. 0.55 0.55 0 ISSUE DATE 94-12-19 97-08-01 ...
Page 22
... CAUTION Wave soldering is NOT applicable for all LQFP packages with a pitch (e) equal or less than 0.5 mm. 1998 Oct 14 OQ2538HP; OQ2538U If wave soldering cannot be avoided, for LQFP packages with a pitch (e) larger than 0.5 mm, the following conditions must be observed: A double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used ...
Page 23
... Accordingly, Philips Semiconductors assumes no liability for device functionality or performance of the die or systems after handling, packing or assembly of the die the responsibility of the customer to test and qualify their application in which the die is used. 1998 Oct 14 OQ2538HP; OQ2538U 23 Product specification ...
Page 24
Philips Semiconductors – a worldwide company Argentina: see South America Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. +61 2 9805 4455, Fax. +61 2 9805 4466 Austria: Computerstr. 6, A-1101 WIEN, P.O. Box 213, Tel. +43 160 1010, ...