ATA12001

www.datasheet4u.com AGC Transimpedance Amplifier SONET OC-24 FEATURES · · · · · Single +5 Volt Supply Automatic Gain Control -31 dBm Sensitivity 0 dBm Optical Overload 1100 MHz Bandwidth 925 um VDD1 ATA12001 PRELIMINARY DATA SHEET-Rev 4 VDD2 GND GND 1992 4E IIN APPLICATIONS · · · · SONET OC-24 (1 Gb/s) Receiver Low Noise RF Amplifier GND GND GND GND CBY CBY GND CAGC VOUT GND BISDN HIPPI 1250 um D1C PRODUCT DESCRIPTION The ANADIGICS ATA12001 is a 5V low noise transimpedance amplifier with AGC designed to be used in 1Gb/s fiber optic links. The device is used in conjunction with a photodetector (PIN diode or avalanche photodiode) to convert an optical signal into an output voltage. The ATA12001 offers a bandwidth of 1100MHz and a dynamic range of 31dB. It is manufactured in a GaAs MESFET process and is available in bare die form. VDD1 AGC 4K 70K VDD2 CAGC GND or neg. Supply IIN - 35 VGA 4pF + 0.8 VOUT GND PATENT PENDING BY Photodetector Cathode must be connected to IIN for proper AGC operation C Figure 1: Equivalent Circuit 08/2001 ATA12001 www.datasheet4u.com VDD2 VDD1 GND GND 1992 925 um 4E IIN GND GND GND GND CBY CBY VOUT GND CAGC GND 1250 um Figure 2: Bonding Pad Layout Table 1: ATA12001 Pad Description PAD V DD1 V DD2 IIN VOUT C AGC C BY D ESC R IPTION V DD1 V DD2 TIA Input C urrent TIA Output Voltage External AGC C apaci tor Input Gai n Stage Bypass C apaci tor C OMMEN T Posi ti ve supply for i nput gai n stage Posi ti ve supply for second gai ...