The ADPD2210 from ADI's is a low-noise current amplifier designed to allow the use of smaller photodiodes by amplifying sensor signal currents by a factor of 24 while adding minimal noise. This amplification provides the system sensitivity of a large photodiode with the benefits of a smaller photodiode. A minimum linearity of 60 dB allows accurate extraction of very small, time-variant signals on top of large DC or low-frequency offsets. The ADPD2211/ADPD2212/ADPD2214 are optical sensors optimized for biomedical applications. Very low power consumption and near theoretical signal-to-noise ratio (SNR) are achieved by packaging an ultra-low-capacitance, deep-junction silicon photodiode operated in zero-bias photoconductive mode with a low-noise current amplifier.
| Applications |
- Medical
- Heart rate
- Chemical analysis
- Hand-held, battery-powered applications
|
|
- Fitness equipment
- Treadmills
- Elliptical machines
|
| Product Features |
ADPD2210 |
ADPD2211 |
ADPD2212 |
ADPD2214 |
| Current Gain |
24 |
24 |
24 |
24 |
| Noise Floor, Input Referred |
80 fA/√Hz |
90 fA/√Hz |
90 fA/√Hz |
90 fA/√Hz |
| Photodiode Area |
None |
1.8 mm² |
2.5 mm² |
4.5 mm² |
| Bandwidth |
85 kHz |
400 kHz |
400 kHz |
75 kHz |
| Integration Level |
Amplifier only - bring your own photodiode |
Amplifier and photodiode |
Amplifier, photodiode, and optical rectifier |
Amplifier, photodiode, and optical rectifier |
| Optical Filter |
N/A |
None |
IR cut |
Green band-pass |
| Power Supply |
1.8 V to 5.0 V |
1.8 V to 5.0 V |
1.8 V to 5.0 V |
1.8 V to 5.0 V |
| Package |
2 mm x 2 mm LFCSP |
3 mm x 3 mm clear mold LFCSP |
3 mm x 4 mm clear mold LFCSP |
4 mm x 4 mm clear mold LFCSP |
The ADPD2210 from ADI's is a low-noise current amplifier designed to allow the use of smaller photodiodes by amplifying sensor signal currents by a factor of 24 while adding minimal noise. This amplification provides the system sensitivity of a large photodiode with the benefits of a smaller photodiode. A minimum linearity of 60 dB allows accurate extraction of very small, time-variant signals on top of large DC or low-frequency offsets. The ADPD2211/ADPD2212/ADPD2214 are optical sensors optimized for biomedical applications. Very low power consumption and near theoretical signal-to-noise ratio (SNR) are achieved by packaging an ultra-low-capacitance, deep-junction silicon photodiode operated in zero-bias photoconductive mode with a low-noise current amplifier.
