ADS1299-4PAGR
Analog-to-Digital ConverterThe ADS1299-4PAGR is a analog-to-digital converter from Texas Instruments. View the full ADS1299-4PAGR datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
Manufacturer
Texas Instruments
Category
Analog-to-Digital Converter
Package
TQFP-64(10x10)
Key Specifications
| Parameter | Value |
|---|---|
| Packaging | MouseReel |
| Standard Pack Qty | 1500 |
Overview
Part: ADS1299-x — Texas Instruments
Type: Low-Noise 24-bit Delta-Sigma Analog-to-Digital Converter (ADC)
Description: A series of 4-channel, 6-channel, and 8-channel low-noise, 24-bit synchronous sampling Delta-Sigma ADCs with integrated programmable gain amplifiers (PGAs), internal reference, and onboard oscillator, designed for cranial EEG and ECG applications.
Operating Conditions:
- Analog supply voltage: 4.75V to 5.25V
- Digital supply voltage: 1.8V to 3.6V
- Operating temperature: -40°C to +85°C
- Data rate: 250 SPS to 16 kSPS
Key Specs:
- Input reference noise: 1 μVPP (70Hz bandwidth)
- Input bias current: 300 pA
- Common-mode rejection ratio (CMRR): -110 dB
- Programmable gain: 1, 2, 4, 6, 8, 12, or 24
- Channels: Up to 8 (4, 6, or 8 channels)
- Resolution: 24-bit
Features:
- Up to 8 low-noise PGAs and 8 high-resolution synchronous sampling ADCs
- Built-in bias drive amplifier, continuous lead-off detection, test signals
- Built-in oscillator
- Internal or external reference
- Flexible power-down, standby modes
- SPI-compatible serial interface
Applications:
- EEG research
- Fetal ECG
- Sleep study monitors
- Bispectral index (BIS)
- Evoked auditory potentials (EAP)
Package:
- TQFP (64) - 10.00mm x 10.00mm
Pin Configuration
Electrical Characteristics
Minimum and maximum specifications apply from TA = -40°C to 85°C. Typical specifications are at TA = +25°C. All specifications are at AVDD - AVSS = 5 V, DVDD = 3.3 V, VREF = 4.5 V, external f CLK = 2.048 MHz, data rate = 250 SPS, and gain = 12 (unless otherwise noted)
| PARAMETER | PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|---|
| ANALOG INPUTS | ANALOG INPUTS | ANALOG INPUTS | ANALOG INPUTS | ANALOG INPUTS | ANALOG INPUTS | ANALOG INPUTS |
| Input capacitance | Input capacitance | Input capacitance T A = +25°C, InxP and INxN = 2.5 V | 20 | 20 | 20 ±300 | pF |
| Input bias current | Input bias current | T A = -40°C to +85°C, InxP and INxN = 2.5 V No lead-off | 1000 | ±300 | pA M Ω | |
| DC input impedance | DC input impedance | Current source lead-off detection (I LEADOFF = 6 nA) | 500 | |||
| PGA PERFORMANCE | PGA PERFORMANCE | PGA PERFORMANCE | PGA PERFORMANCE | PGA PERFORMANCE | PGA PERFORMANCE | PGA PERFORMANCE |
| Gain settings | 1, 2, 4, 6, 8, 12, 24 | 1, 2, 4, 6, 8, 12, 24 | 1, 2, 4, 6, 8, 12, 24 | |||
| Bandwidth See Table 5 PERFORMANCE | Bandwidth See Table 5 PERFORMANCE Resolution | Bandwidth See Table 5 PERFORMANCE | Bandwidth See Table 5 PERFORMANCE 24 | Bandwidth See Table 5 PERFORMANCE | Bandwidth See Table 5 PERFORMANCE | Bandwidth See Table 5 PERFORMANCE Bits |
| DR | Data rate | f CLK = 2.048 MHz | 250 | 16000 | SPS | |
| DC CHANNEL PERFORMANCE | DC CHANNEL PERFORMANCE | DC CHANNEL PERFORMANCE | DC CHANNEL PERFORMANCE | DC CHANNEL PERFORMANCE | DC CHANNEL PERFORMANCE | DC CHANNEL PERFORMANCE |
| Input-referred noise | (0.01 Hz to 70 Hz) | 10 seconds of data, gain = 24 (1) | 1 | |||
| 250 points, 1 second of data, gain = 24, T A = +25°C 250 points, 1 second of data, gain = 24, T A = -40°C to +85°C All other sample rates and gain settings | See Noise | 1 1 Measurements | 1.35 1.6 | μ V PP | ||
| INL Integral nonlinearity | INL Integral nonlinearity Offset error Offset error drift | Full-scale with gain = 12, best fit | 8 60 80 | ppm μ V nV/°C | ||
| Gain error | Excluding voltage reference error | 0.1 | ±0.5 | % of FS | ||
| Gain drift | Gain drift | Excluding voltage reference drift | 3 | ppm/°C | ||
| Gain match between channels 0.2 % of FS AC CHANNEL PERFORMANCE | Gain match between channels 0.2 % of FS AC CHANNEL PERFORMANCE | Gain match between channels 0.2 % of FS AC CHANNEL PERFORMANCE | Gain match between channels 0.2 % of FS AC CHANNEL PERFORMANCE | Gain match between channels 0.2 % of FS AC CHANNEL PERFORMANCE | Gain match between channels 0.2 % of FS AC CHANNEL PERFORMANCE | Gain match between channels 0.2 % of FS AC CHANNEL PERFORMANCE |
| CMRR | Common-mode rejection ratio | f CM = 50 Hz and 60 Hz (2) | -110 | -120 | dB | |
| PSRR | Power-supply rejection ratio | f PS = 50 Hz and 60 Hz | 96 | dB | ||
| Crosstalk | f IN = 50 Hz and 60 Hz | -110 | dB | |||
| SNR | Signal-to-noise ratio | V IN = -2 dBFs, f IN = 10-Hz input, gain = 12 | 121 | dB | ||
| THD | Total harmonic distortion | V IN = -0.5 dBFs, f IN = 10 Hz | -99 | dB | ||
| PATIENT BIAS AMPLIFIER | PATIENT BIAS AMPLIFIER | PATIENT BIAS AMPLIFIER | PATIENT BIAS AMPLIFIER | PATIENT BIAS AMPLIFIER | PATIENT BIAS AMPLIFIER | PATIENT BIAS AMPLIFIER |
| Integrated noise | BW = 150 Hz | 2 | μ V RMS | |||
| Gain bandwidth product | 50-k Ω \ | \ | 10-pF load, gain = 1 | 100 | ||
| Slew rate | 50-k Ω \ | \ | 10-pF load, gain = 1 | 0.07 | ||
| THD | Total harmonic distortion | f IN = 10 Hz, gain = 1 | -80 | dB | ||
| Common-mode input range Short-circuit current | + 0.3 | 1.1 | AVDD - 0.3 | V mA | ||
| Quiescent power | consumption | 20 | μ A |
Absolute Maximum Ratings
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Voltage | AVDD to AVSS | -0.3 | 5.5 | V |
| Voltage | DVDD to DGND | -0.3 | 3.9 | V |
| Voltage | AVSS to DGND | -3 | 0.2 | V |
| Voltage | VREFP to AVSS | -0.3 | AVDD + 0.3 | V |
| Voltage | VREFN to AVSS | -0.3 | AVDD + 0.3 | V |
| Voltage | Analog input | AVSS - 0.3 | AVDD + 0.3 | V |
| Voltage | Digital input | DGND - 0.3 | DVDD + 0.3 | V |
| Current | Input, continuous, any pin except power supply pins (2) | -10 | 10 | mA |
| Temperature | Junction, T J | 150 | °C | |
| Temperature | Storage, T stg | -60 | 150 | °C |
- (2) Input pins are diode-clamped to the power-supply rails. Limit the input current to 10 mA or less if the analog input voltage exceeds AVDD + 0.3 V or is less than AVSS - 0.3 V, or if the digital input voltage exceeds DVDD + 0.3 V or is less than DGND - 0.3 V.
Recommended Operating Conditions
over operating ambient temperature range (unless otherwise noted)
| MIN | NOM | MAX | UNIT | |||
|---|---|---|---|---|---|---|
| POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | ||||
| Analog power supply | AVDD to AVSS | 4.75 | 5 | 5.25 | V | |
| Digital power supply | DVDD to DGND | 1.8 | 1.8 | 3.6 | V | |
| Analog to Digital supply | AVDD - DVDD | -2.1 | 3.6 | V | ||
| ANALOG INPUTS | ANALOG INPUTS | ANALOG INPUTS | ||||
| Full-scale differential input voltage | V INxP - V INxN | ±V REF / gain | ±V REF / gain | ±V REF / gain | V | |
| V CM | Input common-mode range | (V INxP + V INxN ) / 2 | See the Input Common-Mode Range subsection of the PGA Settings and Input Range section | See the Input Common-Mode Range subsection of the PGA Settings and Input Range section | See the Input Common-Mode Range subsection of the PGA Settings and Input Range section | |
| VOLTAGE REFERENCE INPUTS | VOLTAGE REFERENCE INPUTS | VOLTAGE REFERENCE INPUTS | ||||
| V REF | Reference input voltage | V REF = (V VREFP - V VREFN ) | 4.5 | 4.5 | 4.5 | V |
| VREFN | Negative input | AVSS | AVSS | AVSS | V | |
| VREFP | Positive input | Positive input | AVSS + 4.5 | AVSS + 4.5 | AVSS + 4.5 | V |
| CLOCK INPUT | CLOCK INPUT | CLOCK INPUT | ||||
| f CLK | External clock input frequency | CLKSEL pin = 0 | 1.5 | 2.048 | 2.25 | MHz |
| DIGITAL INPUTS | DIGITAL INPUTS | DIGITAL INPUTS | ||||
| Input voltage | Input voltage | DGND - 0.1 | DVDD + 0.1 | V | ||
| TEMPERATURE RANGE | TEMPERATURE RANGE | TEMPERATURE RANGE | ||||
| T A | Operating temperature range | Operating temperature range | -40 | 85 | °C |
Thermal Information
| THERMAL METRIC (1) | ADS1299-4, ADS1299-6, ADS1299 PAG (TQFP) | UNIT | |
|---|---|---|---|
| 64 PINS | |||
| R θ JA | Junction-to-ambient thermal resistance | 46.2 | °C/W |
| R θ JC(top) | Junction-to-case (top) thermal resistance | 5.8 | °C/W |
| R θ JB | Junction-to-board thermal resistance | 19.6 | °C/W |
| ψ JT | Junction-to-top characterization parameter | 0.2 | °C/W |
| ψ JB | Junction-to-board characterization parameter | 19.2 | °C/W |
| R θ JC(bot) | Junction-to-case (bottom) thermal resistance | n/a | °C/W |
Typical Application
The biopotential signals that are measured in electroencephalography (EEG) are small when compared to other types of biopotential signals. The ADS1299 is equipped to measure such small signals due to its extremely low input-referred noise from its high performance internal PGA. Figure 72 and Figure 73 are examples of how the ADS1299 may be configured in typical EEG measurement setups. Figure 72 shows how to measure electrode potentials in a sequential montage, whereas Figure 73 illustrates referential montage measurement connections.
Figure 72. Example Schematic Using the ADS1299 in an EEG Data Acquisition Application, Sequential Montage
Figure 72. Example Schematic Using the ADS1299 in an EEG Data Acquisition Application, Sequential Montage
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| ADS1299 | Texas Instruments | — |
| ADS1299-4 | Texas Instruments | — |
| ADS1299-4PAG | Texas Instruments | TQFP-64(10x10) |
| ADS1299-6 | Texas Instruments | — |
| ADS1299-6PAG | Texas Instruments | — |
| ADS1299-6PAGR | Texas Instruments | — |
| ADS1299-X | Texas Instruments | — |
| ADS1299EEG-FE | Texas Instruments | — |
| ADS1299IPAG | Texas Instruments | |
| ADS1299IPAGR | Texas Instruments | TQFP-64(10x10) |
| ADS1299X | Texas Instruments | — |
Get structured datasheet data via API
Get started free