ONET2804T Texas instruments

ONET2804T

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ONET2804T

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Описание

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. An internal circuit provides the photodiode reverse bias voltage and senses the average photocurrent supplied to each photodiode. 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. 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. The part requires a single 3.3 V supply and typically dissipates 139 mW per channel with a differential output amplitude of 500 mVPP. It is characterized for operation from –40°C to 100°C temperatures and is available in die form with a 750 µm channel pitch. To request a full data sheet, please send an email to: onet2804t_request@ti.com.

4-Channel Multi-Rate operation up to 28 Gbps
10 kΩ Differential Transimpedance
21 GHz Bandwidth
1.8 µA_rms Input Referred Noise
2.9 mA_PP 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

Type	Transimpedance and limiting amplifier
Data rate (max) (MBits)	28000
Supply current (typ) (µA)	42000
Deterministic jitter (typ) (ps)	2
Operating temperature range (°C)	-40 to 100