Overview
The ADPD2210ACPZ-R7, produced by Analog Devices Inc., is an ultralow noise, low power current amplifier designed for applications where power conservation is critical. This device is optimized for pulsed systems, particularly in wearable health monitoring devices such as wrist-worn heart rate monitors (HRM) and finger-worn pulse oximeters for oxygen saturation (SpO2) measurements. It amplifies sensor signal currents by a factor of 24, allowing the use of smaller photodiodes while maintaining the system sensitivity of larger photodiodes.
The ADPD2210 features a very low power consumption, with a typical supply current of 140 μA when active and 100 nA in standby mode. This low power consumption is crucial for extending battery life in battery-powered monitoring applications.
Key Specifications
| Specification | Value |
|---|---|
| Noise Floor | 80 fA/√Hz (typical) |
| Supply Current (Active) | 140 μA (typical) |
| Supply Current (Standby) | 100 nA (typical) |
| Amplification Factor | 24 |
| Output Current Range | Up to 954 μA at full scale |
| Package Type | 6-Lead Lead Frame Chip Scale Package (LFCSP_UD), 2 mm × 2 mm |
| Operating Temperature Range | −40°C to +85°C |
| Power-Down Pin | Available for standby mode |
Key Features
- Ultralow Noise: 80 fA/√Hz (typical) noise floor, ensuring high signal-to-noise ratio (SNR).
- Low Power Consumption: Typical supply current of 140 μA when active and 100 nA in standby mode.
- Flexible Output Configuration: Optimized for pulsed systems with a nominal linear output of 240 μA.
- EMI Immunity: Reduces the effect of electromagnetic interference (EMI) in low-level wired interfaces.
- Space-Saving Package: 6-Lead Lead Frame Chip Scale Package (LFCSP_UD), 2 mm × 2 mm.
- Power-Down Mode: A power-down pin places the device in standby when sensing is inactive, extending battery life.
Applications
- Photoplethysmography (PPG): Used in wearable devices for heart rate monitoring (HRM).
- Photodiode Measurements: Amplifies small current signals from photodiodes, reducing dark current and shot noise.
- Pulse Oximetry: Suitable for finger-worn pulse oximeters for oxygen saturation (SpO2) measurements.
- Small Current Pulsed Amperometry: Ideal for applications requiring the measurement of small, pulsed currents.
Q & A
- What is the typical noise floor of the ADPD2210?
The typical noise floor of the ADPD2210 is 80 fA/√Hz.
- What is the supply current of the ADPD2210 when it is active?
The typical supply current of the ADPD2210 when active is 140 μA.
- How does the ADPD2210 reduce electromagnetic interference (EMI)?
The ADPD2210 reduces EMI by providing sensor site amplification, which improves the signal-to-noise ratio (SNR) and rejects interferer signals from nearby equipment.
- What is the amplification factor of the ADPD2210?
The ADPD2210 amplifies sensor signal currents by a factor of 24.
- What is the purpose of the power-down pin on the ADPD2210?
The power-down pin places the ADPD2210 in standby mode when sensing is inactive, which helps in extending battery life in battery-powered applications.
- What are the common applications of the ADPD2210?
The ADPD2210 is commonly used in photoplethysmography (PPG), photodiode measurements, pulse oximetry, and small current pulsed amperometry.
- What is the operating temperature range of the ADPD2210?
The operating temperature range of the ADPD2210 is −40°C to +85°C.
- What type of package does the ADPD2210 come in?
The ADPD2210 comes in a 6-Lead Lead Frame Chip Scale Package (LFCSP_UD), 2 mm × 2 mm.
- How does the ADPD2210 benefit from its low power consumption?
The low power consumption of the ADPD2210 extends battery life in battery-powered monitoring applications and reduces battery costs in disposable applications.
- Is an evaluation board available for the ADPD2210?
