Texas Instruments ONET2804T
The ONET2804T is a high gain limiting transimpedance amplifier for parallel optical interconnects with data rates up to 28 Gbps. The device is used in conjunction with a 750 μm pitch photodiode array to convert an optical signal into a differential output voltage. The device can be used with pin control or a two-wire serial interface to allow control of the output amplitude, gain, bandwidth and input threshold.| Part No. | ONET2804T |
|---|---|
| Datasheet | ONET2804T Download |
| Manufacturer |  Texas Instruments |
| Description | 28-Gbps 4-Channel Limiting TIA |
| Buy | Stock & Price |
FEATURES
●1 4-Channel Multi-Rate operation up to 28 Gbps● 10 kΩ Differential Transimpedance
● 21 GHz Bandwidth
● 1.8 μArms Input Referred Noise
● 2.9 mAPP Input Overload Current
● Programmable Output Voltage
● Adjustable Gain and Bandwidth
● Received Signal Strength Indicator (RSSI) for each Channel
● 40 dB Isolation Between Channels (Die only)
● Single 3.3 V Supply
● 139 mW per Channel
● Pad Control or 2-Wire Control
● On Chip Filter Capacitors
● –40°C to 100°C Operation
● Die Size: 3250 μm × 1450 μm, 750 μm Channel Pitch 2
APPLICATIONS
● 100 Gigabit Ethernet Optical Receivers● ITU OTL4.4
● CFP2, CFP4, and QSFP28 Modules with Internal Retiming 3
DESCRIPTION
An internal circuit provides the photodiode reverse bias voltage and senses the average photocurrent supplied to each photodiode. The ONET2804T provides 21 GHz bandwidth, a gain of 10 kΩ, an input referred noise of 1.8 µArms and a received signal strength indicator (RSSI) for each channel. 40 dB isolation between channels results in low crosstalk penalty in the receiver.
