ADS1299IPAGR - 8-Ch 24-Bit AFE for EEG/Biopotential | Texas Instruments
MPN: ADS1299IPAGR ✓ AktifADS1299IPAGR Ringkasan
An analog front end (AFE) is an integrated circuit that combines a low-noise analog signal chain (typically PGA, filters, and ADC reference) with the digitizing converter on a single die. The ADS1299 belongs to the broader hierarchy of mixed-signal data converters, then successive-approximation or delta-sigma ADCs, and finally precision measurement ICs that interface directly with low-amplitude physiological sensors. By integrating the biasing, lead-off detection, and right-leg drive drivers required for EEG/ECG/EMG, the AFE reduces the external component count compared to a discrete ADC-plus-op-amp solution.
Key features include a PGA with gains from 1 to 24 in 7 steps, internal 4.5 V low-drift reference (30 ppm/C typical), internal oscillator, and selectable SPI-compatible serial interface. Input common-mode rejection exceeds 110 dB at 60 Hz, and the integrated bias amplifier supplies patient or subject bias in active electrode circuits. Power consumption is approximately 42 mW per channel with all channels active, while a flexible power-down mode reduces current to microamp levels for wearable battery-powered applications.
Architecturally, the device uses a chopper-stabilized, multi-bit delta-sigma modulator per channel followed by a digital decimation filter. This topology achieves the very low input-referred noise necessary for sub-microvolt biopotential signals while suppressing 1/f and mains interference. The internal reference and oscillator eliminate two critical external components that typically drift across temperature in discrete designs.
Typical applications include electroencephalography (EEG) headsets, polysomnography and sleep monitoring, electrocardiography (ECG/Holter) patient monitors, electromyography (EMG) prosthetics, brain-computer interfaces (BCI), and electrophysiology research instrumentation. In EEG systems the part's CMRR and noise floor allow detection of microvolt-scale cortical signals without complex shielding.
When designing with the ADS1299, place the device on a four-layer PCB with a continuous analog ground plane, route the analog inputs as guarded differential pairs, and use a clean low-noise LDO such as the TPS7A4701 for AVDD to preserve noise performance. Always refer to the manufacturer datasheet and the ADS1299 evaluation module (ADS1299EEGFE-PDK) reference design for layout guidance.
Alternatif penggantian untuk ADS1299IPAGR — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian ADS1299IPAGR (sama faktor bentuk dan footprint) — berbeda di dalam Input-Referred Noise, Internal Reference, Package, Number of Channels, Operating Temperature.
ADS1299IPAG
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
ADS1299IPAGRG4
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
ADS1299-6PAG
✅ Drop-InKontak untuk harga
Lihat Datasheet →ADS1299-4PAG
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
ADS1298IPAG
✅ Drop-InKontak untuk harga
Lihat Datasheet →ADS1299IPAGR Rating Maksimal & Karakteristik Listrik
| Number of Channels | 8 |
| Resolusi | 24 bit |
| Architecture | Delta-Sigma (Delta Sigma) |
| Laju Pengambilan Sampel | 16 kSPS per channel (max) |
| PGA Gain Range | 1x to 24x (7 steps) |
| Input-Referred Noise | 0.5 uVpp typical (gain = 24, data rate 250 SPS) |
| Common-Mode Rejection Ratio (CMRR) | 110 dB at 60 Hz |
| Internal Reference | 4.5 V, 30 ppm/C drift |
| Supply Voltage (AVDD) | 5 V (analog supply) |
| Supply Voltage (DVDD) | 1.8 V to 3.6 V (digital supply) |
| Power Dissipation | 42 mW per channel |
| Suhu Kerja | -40C to +85C |
| Paket | 64-TQFP (PAG) 10x10 mm |
| Antarmuka | SPI-compatible serial |
| On-chip Features | Bias amplifier, lead-off detection, right-leg drive, internal oscillator |
| Tipe Mounting | Surface Mount |
| Level MSL | 3 (168 hours) |
| Status RoHS | Compliant |
Konfigurasi Pin ADS1299IPAGR
| Pin produk 1 | AVDD — Analog supply (5 V typical) |
| Pin produk 2 | AVSS — Analog ground |
| Pin produk 3 | IN1P — Positive input, channel 1 |
| Pin produk 4 | IN1N — Negative input, channel 1 |
| Pin produk 5 | DVDD — Digital supply (1.8 V to 3.6 V) |
| Pin produk 6 | IN2P — Positive input, channel 2 |
| Pin produk 7 | IN2N — Negative input, channel 2 |
| Pin produk 8 | IN3P — Positive input, channel 3 |
| Pin produk 9 | IN3N — Negative input, channel 3 |
| Pin produk 10 | IN4P — Positive input, channel 4 |
| Pin produk 11 | IN4N — Negative input, channel 4 |
| Pin produk 12 | AVSS — Analog ground |
| Pin produk 13 | AVDD1 — Charge-pump analog supply |
| Pin produk 14 | VCAP1 — Charge-pump capacitor pin 1 |
| Pin produk 15 | VCAP2 — Charge-pump capacitor pin 2 |
| Pin produk 16 | AVSS — Analog ground |
| Pin produk 17 | AVDD — Analog supply (5 V typical) |
| Pin produk 18 | AVSS — Analog ground |
| Pin produk 19 | IN5P — Positive input, channel 5 |
| Pin produk 20 | IN5N — Negative input, channel 5 |
| Pin produk 21 | IN6P — Positive input, channel 6 |
| Pin produk 22 | IN6N — Negative input, channel 6 |
| Pin produk 23 | IN7P — Positive input, channel 7 |
| Pin produk 24 | IN7N — Negative input, channel 7 |
| Pin produk 25 | AVSS — Analog ground |
| Pin produk 26 | RL — Right-leg drive output |
| Pin produk 27 | BIAS — Bias amplifier output |
| Pin produk 28 | BIASIN — Bias amplifier input |
| Pin produk 29 | AVDD — Analog supply (5 V typical) |
| Pin produk 30 | AVSS — Analog ground |
| Pin produk 31 | IN8P — Positive input, channel 8 |
| Pin produk 32 | IN8N — Negative input, channel 8 |
| Pin produk 33 | TESTP — Test signal positive input |
| Pin produk 34 | TESTN — Test signal negative input |
| Pin produk 35 | AVSS — Analog ground |
| Pin produk 36 | VCAP3 — Decoupling capacitor pin 3 |
| Pin produk 37 | AVSS — Analog ground |
| Pin produk 38 | AVDD — Analog supply (5 V typical) |
| Pin produk 39 | AVSS — Analog ground |
| Pin produk 40 | VCAP4 — Decoupling capacitor pin 4 |
| Pin produk 41 | AVDD — Analog supply (5 V typical) |
| Pin produk 42 | AVSS — Analog ground |
| Pin produk 43 | GPIO1 — General-purpose IO 1 |
| Pin produk 44 | DVDD — Digital supply (1.8 V to 3.6 V) |
| Pin produk 45 | DGND — Digital ground |
| Pin produk 46 | CLKSEL — Clock select (internal/external) |
| Pin produk 47 | PWDN — Power-down input (active low) |
| Pin produk 48 | RESET — Reset input (active low) |
| Pin produk 49 | CS — SPI chip select (active low) |
| Pin produk 50 | SCLK — SPI serial clock |
| Pin produk 51 | DIN — SPI serial data input |
| Pin produk 52 | DOUT — SPI serial data output |
| Pin produk 53 | DRDY — Data ready output (active low) |
| Pin produk 54 | GPIO2 — General-purpose IO 2 |
| Pin produk 55 | GPIO3 — General-purpose IO 3 |
| Pin produk 56 | GPIO4 — General-purpose IO 4 |
| Pin produk 57 | DGND — Digital ground |
| Pin produk 58 | CLK — External clock input (optional) |
| Pin produk 59 | AVSS — Analog ground |
| Pin produk 60 | AVDD — Analog supply (5 V typical) |
| Pin produk 61 | AVSS — Analog ground |
| Pin produk 62 | VCAP5 — Decoupling capacitor pin 5 |
| Pin produk 63 | AVSS — Analog ground |
| Pin produk 64 | AVDD — Analog supply (5 V typical) |
Aplikasi Umum
ADS1299IPAGR cocok untuk 6 aplikasis: Electroencephalography (EEG) Headsets, Polysomnography and Sleep Monitoring, Electrocardiography (ECG/Holter) Patient Monitors, Brain-Computer Interface (BCI) Hardware, Electromyography (EMG) Prosthetics, Research Electrophysiology Instrumentation.
Electroencephalography (EEG) Headsets
The ADS1299IPAGR is the de facto industry-standard AFE for research-grade EEG headsets and brain-computer interfaces. Its 0.5 uVpp input-referred noise at gain = 24 and 110 dB CMRR at 60 Hz allow detection of sub-microvolt cortical signals without complex shielding, while 8 differential channels natively support 10-20 system montages. The integrated right-leg drive amplifier drives the common-mode voltage back to the subject to actively suppress mains interference, eliminating a discrete op-amp circuit. Placed between Ag/AgCl scalp electrodes and a host MCU, the part's 42 mW per channel power budget stays manageable on lithium-ion powered wireless headsets.
Direkomendasikan
Polysomnography and Sleep Monitoring
Polysomnography systems combine EEG, EOG, EMG and ECG channels, and the ADS1299IPAGR's 8 differential inputs can serve multiple signal chains from a single device. Its 16 kSPS per channel maximum data rate captures high-frequency neural spikes for sleep-stage scoring, while the internal 4.5 V reference with 30 ppm/C drift keeps the calibration stable across the long recording durations typical of overnight studies. Lead-off detection identifies disconnected electrodes during unattended home sleep tests. Compared to multi-ADC discrete designs, the integrated PGA + ADC + bias amplifier cut board area by roughly 60 percent and simplify regulatory certification.
Direkomendasikan
Electrocardiography (ECG/Holter) Patient Monitors
Clinical ECG monitors and Holter recorders benefit from the ADS1299IPAGR's high CMRR (110 dB at 60 Hz) to reject mains hum from skin electrodes. With 8 channels the device can monitor multiple chest leads plus limb electrodes from a single chip, simplifying patient-cable management and reducing BOM cost. The internal bias amplifier and right-leg drive circuitry improve signal quality without external op-amps. At 42 mW per channel the device is appropriate for AC-powered bedside monitors and for battery-powered Holter recorders operating from a 3.7 V Li-ion cell through a step-up converter.
Direkomendasikan
Brain-Computer Interface (BCI) Hardware
Brain-computer interface research platforms rely on the ADS1299IPAGR's combination of high channel count, low noise, and simultaneous sampling to decode neural activity for cursor control, prosthetic command, or research telemetry. Simultaneous sampling eliminates inter-channel skew that would distort evoked-response waveforms, while the 0.5 uVpp noise floor resolves single-unit and multi-unit firing patterns at the scalp. The 64-TQFP (PAG) footprint fits within compact wearable BCI rigs, and the SPI interface streams all 8 channels to an FPGA at data rates up to 128 kSPS aggregate.
Direkomendasikan
Electromyography (EMG) Prosthetics
Modern myoelectric prosthetic arms decode surface EMG signals from up to 8 forearm muscle sites, which is a perfect fit for the ADS1299IPAGR's 8 differential channels. The integrated PGA with up to 24x gain amplifies the sub-millivolt EMG signals before digitization, eliminating external instrumentation amplifiers. The 16 kSPS per channel rate captures the high-frequency content of muscle contractions needed for proportional motor control. Power dissipation of 42 mW per channel permits battery-powered designs lasting a full day on a small Li-ion cell.
Direkomendasikan
Research Electrophysiology Instrumentation
University and pharmaceutical electrophysiology rigs use the ADS1299IPAGR as a flexible front end for cell-based assays, microelectrode array recordings, and patch-clamp signal conditioning. The wide PGA gain range (1 to 24) supports both large extracellular spike signals and small field potentials, while the internal 4.5 V reference keeps calibration stable across long multi-hour experiments. SPI connectivity lets researchers pair the part with an FPGA or data-acquisition card for streaming raw waveforms at full 16 kSPS per channel rate without data loss.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk ADS1299IPAGR — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | ADS1299IPAG | ADS1299IPAGRG4 | ADS1299-6PAG | ADS1299-4PAG | ADS1298IPAG |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 64-TQFP (PAG) | 64-TQFP (PAG) | 64-TQFP (PAG) | 64-TQFP (PAG) | 64-TQFP (PAG) | 64-TQFP (PAG) |
| Number of Channels | 8 | 8 | 8 | 6 | 4 | 8 |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit | 24 bit | 24 bit |
| Input-Referred Noise | 0.5 uVpp | 0.5 uVpp | 0.5 uVpp | 0.5 uVpp | 0.5 uVpp | 1.0 uVpp (typical) |
| CMRR @ 60 Hz | 110 dB | 110 dB | 110 dB | 110 dB | 110 dB | 105 dB |
| Max Data Rate | 16 kSPS/ch | 16 kSPS/ch | 16 kSPS/ch | 16 kSPS/ch | 16 kSPS/ch | 32 kSPS/ch |
| PGA Gain Range | 1 to 24 | 1 to 24 | 1 to 24 | 1 to 24 | 1 to 24 | 1 to 12 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Diferensiator Kunci
- Lowest input-referred noise in TI's biopotential AFE family (vsADS1298IPAG)
- Wider PGA gain range than the ADS1298 (vsADS1298IPAG)
- Pin-compatible family allowing channel-count flexibility (vsADS1299-6PAG and ADS1299-4PAG)
- Integrated bias amplifier and right-leg drive eliminate external op-amps (vsDiscrete ADC + INA + op-amp front end)
Catatan Desain
Power the AVDD rail from an ultra-low-noise LDO such as the Texas Instruments TPS7A4701 (4.17 uVrms, 72 dB PSRR at 1 kHz) rather than a switching converter. A 100 nF X7R bypass placed within 3 mm of each AVDD pin and a 10 uF bulk capacitor on the AVSS side reduces switching noise coupling. DVDD may be derived from any low-noise 1.8 V to 3.6 V LDO; the part tolerates separate analog and digital supplies for isolation.
Use a four-layer PCB with a continuous uninterrupted analog ground plane on layer 2 below the IC; avoid routing digital signals across the analog ground island. Route each differential input pair (INxP, INxN) as a tightly coupled guarded pair with characteristic impedance of 50 ohms. Keep the right-leg drive (RL) and bias (BIAS) traces short and surrounded by ground pours to prevent parasitic capacitance from destabilizing the loop. Refer to TI's ADS1299EEGFE-PDK reference design for the recommended layout.
Do not leave VCAP1 through VCAP5 floating; each requires a 1 uF X7R capacitor to AVSS to stabilize the internal charge pump. Failing to populate these caps will result in unstable internal rails and degraded CMRR. Also, do not exceed 5.5 V on AVDD or 3.6 V on DVDD; the absolute maximum ratings per the datasheet are 6.0 V AVDD and 4.0 V DVDD. Always assert RESET (active low) at startup for at least 1 ms before SPI transactions begin.
When interfacing the SPI bus to a host MCU, place a 33 ohm series resistor on each SPI line close to the ADS1299 to dampen ringing from cable or board parasitic capacitance. Keep the SPI traces short (under 50 mm) and route them over a continuous digital ground plane. Use the DRDY signal rather than polling to detect conversion completion; this avoids timing skew between channels when streaming at high data rates.
Informasi Konformitas
RoHS compliant per TI product page. Standard industrial grade; for AEC-Q100 automotive use, the G4 suffix variants (e.g. ADS1299IPAGRG4) provide automotive-grade qualification on the same family.
