The OPA859 is a wideband, low-noise operational 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 applications.
The graph below shows the bandwidth and noise performance of the OPA859 as a function of the photodiode capacitance when the amplifier is set as a TIA. The total noise is calculated along a bandwidth range extending from dc to the calculated frequency, f, on the left-hand scale. The OPA859 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.
The OPA859 is optimized to operate in optical time-of-flight (ToF) systems where the OPA859 is used with time-to-digital converters, such as the TDC7201. Use the OPA859 to drive a high-speed analog-to-digital converter (ADC) in high-resolution LIDAR systems with a differential output amplifier, such as the THS4541 or LMH5401.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
OPA859 | WSON (8) | 2.00 mm × 2.00 mm |
DATE | REVISION | NOTES |
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September 2018 | * | Initial release. |
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
FB | 1 | I | Feedback connection to output of amplifier |
IN– | 3 | I | Inverting input |
IN+ | 4 | I | Noninverting input |
NC | 2 | — | Do not connect |
OUT | 6 | O | Amplifier output |
PD | 8 | I | Power down connection. PD = logic low = power off mode; PD = logic high = normal operation. |
VS– | 5 | — | Negative voltage supply |
VS+ | 7 | — | Positive voltage supply |
Thermal pad | — | Connect the thermal pad to VS– |