PHY1095-01DS+GR1

19-5689; Rev 1/11 PHY1095-01 A Maxim Integrated Products Brand 1.25Gbps High Sensitivity Transimpedance Amplifier Features Description -32dBm Sensitivity Up to 1.25Gbps (NRZ) data rates 60nA rms typical input referred noise Automatic gain control Flexible bond pad layout and output signal inversion for simple ROSA layout • Received Signal Strength Indicator output with selectable direction of current flow • -40 to +95°C operating temperature range The PHY1095 is a transimpedance amplifier designed for use within small form factor fibre optic modules targeted at Gigabit Enabled Passive Optical Network (GEPON) applications. Applications Sensitivity of -32dBm can be achieved at 1.25Gbps using a photodiode with 0.5pF capacitance and a responsivity of 0.8A/W at a wavelength of 1490nm. • • • • • Working from a 3.3V power supply the PHY1095 integrates a low noise transimpedance amplifier, with a typical differential transimpedance of 60kΩ, an AGC and an output stage. The RSSI pad can be used to implement a signal strength monitor circuit. This is designed to sink or source a current equal to the photodiode current for ease of interfacing. • GEPON Optical Network Unit (ONU) • Gigabit Ethernet The PHY1095 is available in die form for mounting on a header to create a ROSA when combined with suitable optics and photo-detector diode. VCC Voltage Regulator PDC1/2 50 Ω RF PDA Amplifier 50 Ω Signal Detect & DC Restore AGC Amp O/P Buffer GND RX+ RX- Signal Strength Indicator RSSI_DIR RSSI AGC DATA_INVERT Figure 1: Outline block diagram Figure 2: Device pad layout PHY1095-01-RD-1.1 Datasheet Page 1 1 Ordering Information Part Number Description Package PHY1095-01DS-WR 1.25G High Sensitivity TIA Bare die in waffle pack PHY1095-01DS-FR 1.25G High Sensitivity TIA Film on grip ring 2 Pad Description Number Name Type 1 GND1 PWR 2 PDC1 Analog Regulated Power supply to Photodiode Cathode 3 PDA Analog Connect to Photodiode anode, input to TIA stage 4 PDC2 Analog Regulated Power supply to Photodiode Cathode 5 GND2 PWR 6 RSSI Analog Out 7 VCC1 PWR 3.3 Volt Power supply connection 8 VCC2 PWR 3.3 Volt Power supply connection 9 RX- Analog Out 10 GND3 GND Connect to Analog Ground 11 GND4 GND Connect to Analog Ground 12 GND5 GND Connect to Analog Ground 13 DATA_INVERT Analog Input 14 GND6 GND Connect to Analog Ground 15 GND7 GND Connect to Analog Ground 16 GND8 GND Connect to Analog Ground 17 RX+ Analog Out 18 AGC Analog 19 VCC3 PWR 3.3 Volt Power supply connection 20 VCC4 PWR 3.3 Volt Power supply connection 21 RSSI_DIR Analog Input PHY1095-01-RD-1.1 Description Connect to Analog Ground Connect to Analog Ground Received Signal Strength output. Sinks or sources current equal to PD current Differential Analog Output pair with RX+ Inverts polarity of data output pins RX+ and RX- Differential Analog Output pair with RXDisables AGC amplifier function when connected to GND Selects whether RSSI output is a current sink or source. Open circuit is a current sink, connect to Ground for current source Datasheet Page 2 3 Device Specifications 3.1 Absolute Maximum Ratings Exceeding these limits may cause permanent damage. Correct operation under these conditions is not implied. Extended periods of operation under these conditions may affect device reliability. Min Max Unit Supply voltage Parameter -0.5 4.0 V Maximum Voltage on signal pins -0.5 Vcc + 0.5V V +115 °C 150 °C 400 °C 3.0 mA Device Operating Temperature Conditions Measured on Die Storage Temperature -55 Die Attach Temperature PDA Input Current 1 ESD Performance Notes: 1 Average input current, VCC > 3.0V, PIN photodiode biased internally from PDC, ER=10dB Ramp time of input current to maximum (0mA to 3mA) from initial optical input 200 µs Human Body Model (excluding PDA pin) 2.0 kV Human Body Model (PDA pin) 0.5 kV See section 4.1 in case of external Vpd biasing of the photodiode 3.2 Recommended Operating Conditions Parameter Conditions Supply voltage Current consumption Including output termination Ambient Operating temperature Photodiode Capacitance PHY1095-01-RD-1.1 Min Typ Max Unit 3.0 3.3 3.6 V 30 42 55 mA 95 °C 1.0 pF -40 Photodiode bias voltage 1.8V Datasheet Page 3 3.3 Parametric Performance Parameter Conditions High-speed data input rate Min CIN = 0.5pF, Responsivity = 0.8A/W, BER = 10 Sensitivity Examples -12 ER = 10dB CIN = 0.5pF, Responsivity = 0.8A/W, BER = 10 -10 ER = 10dB Input referred noise CIN = 0.5pF, Measured into a 940MHz, 4 order Bessel filter. Small Signal Bandwidth (-3dB) Relative to 100MHz, CIN = 0.5pF Low frequency cut-off Relative to +100MHz Gain Variation with Frequency 1MHz to 630MHz Differential Output Swing 1 Input current > 8µA pp 100Ω differential load, 1.25Gbps Parameter Conditions Transimpedance (differential) Input current