AD8232

Part: AD8232 from Analog Devices

Type: Single-Lead ECG Front End

Description: The AD8232 is an integrated signal conditioning block for ECG and biopotential measurements, featuring a 2.0–3.5 V supply, 170 μA typical supply current, 80 dB common-mode rejection ratio, and integrated high-pass and low-pass filters.

Operating Conditions:

• Supply voltage: 2.0 V to 3.5 V
• Operating temperature: -40°C to +105°C
• Instrumentation amplifier gain: 100
• DC differential input range: -300 mV to +300 mV

Absolute Maximum Ratings:

• Max supply voltage: 3.6 V
• Max junction temperature: 140°C

Key Specs:

• Supply Current (Quiescent): 170 μA (Typ, T A = 0°C to 70°C)
• Common-Mode Rejection Ratio (DC to 60 Hz): 80 dB (Min)
• Input Bias Current: 50 pA (Typ, T A = 0°C to 70°C)
• Input Voltage Range: 0.2 V to +V S (Min/Max)
• Instrumentation Amplifier Gain: 100 (Typ)
• RFI Filter Cutoff (Each Input): 1 MHz (Typ)
• ESD Rating (Human Body Model): 8 kV
• Fast Restore Switch On Resistance: 10 Ω (Typ)

Features:

• Fully integrated single-lead ECG front end
• Low supply current: 170 μA (typical)
• Common-mode rejection ratio: 80 dB (dc to 60 Hz)
• Two or three electrode configurations
• High signal gain (G = 100) with dc blocking capabilities
• 2-pole adjustable high-pass filter
• Accepts up to ±300 mV of half cell potential
• Fast restore feature improves filter settling
• Uncommitted op amp
• 3-pole adjustable low-pass filter with adjustable gain
• Leads off detection: ac or dc options
• Integrated right leg drive (RLD) amplifier
• Single-supply operation: 2.0 V to 3.5 V
• Integrated reference buffer generates virtual ground
• Rail-to-rail output
• Internal RFI filter
• 8 kV HBM ESD rating
• Shutdown pin
• Qualified for automotive applications

Applications:

• Fitness and activity heart rate monitors
• Portable ECG
• Remote health monitors
• Gaming peripherals
• Biopotential signal acquisition

Package:

• 20-lead, 4 mm × 4 mm LFCSP
• LFCSP_SS package

Fully integrated single-lead ECG front end Low supply current: 170 μA (typical) Common-mode rejection ratio: 80 dB (dc to 60 Hz) Two or three electrode configurations High signal gain (G = 100) with dc blocking capabilities 2-pole adjustable high-pass filter Accepts up to ±300 mV of half cell potential Fast restore feature improves filter settling Uncommitted op amp 3-pole adjustable low-pass filter with adjustable gain Leads off detection: ac or dc options Integrated right leg drive (RLD) amplifier Single-supply operation: 2.0 V to 3.5 V Integrated reference buffer generates virtual ground Rail-to-rail output Internal RFI filter 8 kV HBM ESD rating Shutdown pin 20-lead, 4 mm × 4 mm LFCSP and LFCSP_SS package Qualified for automotive applications

Fitness and activity heart rate monitors Portable ECG Remote health monitors Gaming peripherals Biopotential signal acquisition

AD8232 Pinout

Package: LQFP-20 (with Exposed Pad)

Notes

• Pin numbers 1–20 are confirmed from the pin diagram image (LQFP-20 top view).
• The exposed pad (EP) is a separate connection point on the bottom of the package; it is not numbered in the standard pin sequence.
• This is a single-channel ECG signal conditioning IC with integrated instrumentation amplifier, high-pass filtering, right leg drive, and leads-off detection.

Table 2.

Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operation beyond the maximum operating conditions for extended periods may affect product reliability.