OPA3S2859 Series

Dual-channel, 900-MHz 2.2-nV/√Hz programmable-gain transimpedance amplifier

Catalog

Dual-channel, 900-MHz 2.2-nV/√Hz programmable-gain transimpedance amplifier

Part	-3db Bandwidth	Current - Supply	Amplifier Type	Voltage - Supply Span (Min) [Min]	Operating Temperature [Min]	Operating Temperature [Max]	Number of Circuits	Voltage - Input Offset	Gain Bandwidth Product	Slew Rate	Package / Case	Mounting Type	Supplier Device Package	Current - Input Bias	Voltage - Supply Span (Max) [Max]	Current - Output / Channel [custom]
Texas Instruments OPA3S2859IRTWR	130 MHz	44 mA	Programmable Gain	3.3 V	-40 °C	125 °C	2	900 µV	900 MHz	350 V/µs	24-WFQFN Exposed Pad	Surface Mount	24-WQFN (4x4)	50 pA	5.25 V	74 mA

Catalog

Dual-channel, 900-MHz 2.2-nV/√Hz programmable-gain transimpedance amplifier

Key Features

• Gain bandwidth product: 900 MHzInternal switches for programmable gainHigh impedance FET inputsInput voltage noise: 2.2 nV/√HzSlew rate: 350 V/µsSupply voltage range: 3.3 V to 5.25 VQuiescent current: 22 mA/channelPower down mode IQ: 75 µATemperature range: -40 °C to 125 °CGain bandwidth product: 900 MHzInternal switches for programmable gainHigh impedance FET inputsInput voltage noise: 2.2 nV/√HzSlew rate: 350 V/µsSupply voltage range: 3.3 V to 5.25 VQuiescent current: 22 mA/channelPower down mode IQ: 75 µATemperature range: -40 °C to 125 °C

Description

The OPA3S2859 is a wideband, low-noise programmable gain amplifier with CMOS inputs for wideband transimpedance and voltage amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 0.9-GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths in low-capacitance photodiode (PD) applications. The three internal switched feedback paths along with an optional parallel non-switched feedback path allows for up to four selectable gain configurations. The internal switches minimize parasitic contributions to increase performance compared to systems that use discrete external switches. Each switch is optimized for feedback resistor values ranging from < 1 kΩ to > 100 kΩ for wide dynamic range applications. The selected switch path is controlled for both channels using a 2-wire parallel interface. For each channel selected, the gain path can also be held constant by exerting the latch pin, which subsequently disables switch control for the selected channel and prevents the channel from changing gain. . . . The OPA3S2859 is a wideband, low-noise programmable gain amplifier with CMOS inputs for wideband transimpedance and voltage amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 0.9-GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths in low-capacitance photodiode (PD) applications. The three internal switched feedback paths along with an optional parallel non-switched feedback path allows for up to four selectable gain configurations. The internal switches minimize parasitic contributions to increase performance compared to systems that use discrete external switches. Each switch is optimized for feedback resistor values ranging from < 1 kΩ to > 100 kΩ for wide dynamic range applications. The selected switch path is controlled for both channels using a 2-wire parallel interface. For each channel selected, the gain path can also be held constant by exerting the latch pin, which subsequently disables switch control for the selected channel and prevents the channel from changing gain. . . .