ADS8900B - 20-Bit 1-MSPS SAR ADC with Integrated Reference Buffer | TI
MPN: ADS8900B β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $10 | $1,000.00 |
| 500 | $9 | $4,500.00 |
| 1,000 | $8.1 | $8,100.00 |
Drop-in alternatives for ADS8900B β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ADS8902B
β Drop-Inπ Reference alternative (not in catalog)
ADS8904B
β Drop-Inπ Reference alternative (not in catalog)
ADS8910B
β Drop-Inπ Reference alternative (not in catalog)
ADS8920B
β Drop-Inπ Reference alternative (not in catalog)
ADS8887
β Drop-Inβ In Stock
$5.5 / Unit
View Datasheet βADS8900B Maximum Ratings & Electrical Characteristics
| Resolution | 20 bits |
| Sampling Rate | 1 MSPS |
| Number of Channels | 1 |
| Input Type | Unipolar, Fully Differential |
| INL | Β±1 ppm |
| SNR | 104.5 dB |
| Integrated Reference Buffer | Yes |
| Integrated LDO | Yes |
| Analog Supply Voltage | 3.3 V |
| Digital Supply Voltage | 1.8 V |
| Power Consumption | 15 mW at 1 MSPS |
| Interface | SPI-compatible |
| Package | 20-pin VQFN |
| Operating Temperature Range | [DATA_NEEDED: Operating temperature range] |
| RoHS Status | Compliant |
ADS8900B Pin Configuration
| Pin 1 | AVDD β Analog power supply |
| Pin 2 | AINP β Positive analog input |
| Pin 3 | AINM β Negative analog input |
| Pin 4 | REF β Reference voltage input |
| Pin 5 | GND β Ground |
| Pin 6 | DVDD β Digital power supply |
| Pin 7 | SCLK β Serial clock input |
| Pin 8 | SDI β Serial data input |
| Pin 9 | SDO β Serial data output |
| Pin 10 | CS β Chip select |
| Pin 11 | CONVST β Conversion start |
| Pin 12 | BUSY β Busy indicator |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADS8900B is suitable for 6 applications: Industrial Automation, Motor Control, Power Quality Monitoring, Medical Instrumentation, Test and Measurement, Data Acquisition Systems.
Industrial Automation
The ADS8900B's 20-bit resolution and 1 MSPS sampling rate enable precise monitoring of industrial processes. Its Β±1 ppm INL ensures accurate conversion of sensor signals, critical for closed-loop control systems. The integrated LDO simplifies power supply design in factory environments, reducing component count and board space. With 104.5 dB SNR, it can resolve small signal variations, improving process control accuracy. The SPI interface allows easy integration with PLCs and industrial microcontrollers, supporting high-speed data acquisition in real-time monitoring systems.
Recommended
Motor Control
In motor control, the ADS8900B provides high-resolution current and voltage sensing, essential for precise torque and speed regulation. Its 1 MSPS sampling rate captures fast transients, while 104.5 dB SNR ensures clean measurements even in noisy environments. The integrated reference buffer maintains stable reference voltage, reducing error. The device's low power consumption (15 mW) is beneficial for compact drives. The SPI interface supports daisy-chaining for multi-axis systems, enabling synchronized data acquisition across multiple channels.
Recommended
Power Quality Monitoring
The ADS8900B is ideal for power quality analyzers, offering 20-bit resolution to detect harmonics and transients on power lines. Its high SNR (104.5 dB) allows accurate measurement of small signal distortions. The device's 1 MSPS sampling rate captures high-frequency components, essential for waveform analysis. The integrated LDO enables operation from a single supply, simplifying design in field-deployed monitors. The SPI interface facilitates data transfer to DSPs for real-time analysis, making it suitable for smart grid applications.
Recommended
Medical Instrumentation
In medical devices like patient monitors and imaging systems, the ADS8900B's high precision is crucial. Its 20-bit resolution and Β±1 ppm INL ensure accurate biopotential measurements, while 104.5 dB SNR minimizes noise interference. The low power consumption (15 mW) is ideal for battery-powered portable devices. The compact VQFN package saves space in wearable designs. The SPI interface allows integration with medical-grade microcontrollers, supporting real-time data processing for diagnostic accuracy.
Recommended
Test and Measurement
The ADS8900B is well-suited for precision test equipment such as data acquisition systems and benchtop instruments. Its 20-bit resolution and 1 MSPS sampling rate provide high accuracy and speed for capturing waveforms. The Β±1 ppm INL ensures linearity, critical for calibration and metrology. The integrated reference buffer reduces external component count, simplifying design. The SPI interface supports high-speed data transfer to FPGAs or DSPs, enabling real-time analysis in oscilloscopes and spectrum analyzers.
Recommended
Data Acquisition Systems
The ADS8900B is a key component in high-resolution data acquisition systems, offering 20-bit resolution and 1 MSPS sampling. Its integrated reference buffer and LDO simplify power and reference design, reducing board space. The device's high SNR (104.5 dB) ensures accurate digitization of sensor signals. The SPI interface supports daisy-chaining, enabling multi-channel synchronized acquisition. With low power consumption, it is suitable for portable and remote monitoring systems, providing reliable data for analysis.
Recommended
Recommended Products Summary
Engineering reference data for ADS8900B β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS8902B | ADS8904B | ADS8910B | ADS8920B | ADS8887 |
|---|---|---|---|---|---|---|
| Resolution | 20 bits | 20 bits | 20 bits | 18 bits | 16 bits | 18 bits |
| Sampling Rate | 1 MSPS | 2 MSPS | 4 MSPS | 1 MSPS | 1 MSPS | 1 MSPS |
| INL | Β±1 ppm | Β±1 ppm | Β±1 ppm | Β±1 ppm | Β±1 ppm | Β±1 ppm |
| SNR | 104.5 dB | 104.5 dB | 104.5 dB | 102 dB | 96 dB | 102 dB |
| Integrated Reference Buffer | Yes | Yes | Yes | Yes | Yes | No |
| Integrated LDO | Yes | Yes | Yes | Yes | Yes | No |
| Package | 20-pin VQFN | 20-pin VQFN | 20-pin VQFN | 20-pin VQFN | 20-pin VQFN | 20-pin VQFN |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
Key Differentiators
- Integrated reference buffer and LDO (vs ADS8887)
- Higher resolution (vs ADS8910B)
- Pin-to-pin compatibility with family (vs ADS8920B)
Design Notes
The ADS8900B has separate analog (AVDD) and digital (DVDD) supplies. Use low-impedance decoupling capacitors (e.g., 0.1 Β΅F and 10 Β΅F) close to each supply pin. The integrated LDO can be used to generate the reference voltage, but for highest accuracy, consider an external low-noise reference. Ensure the analog supply is clean and isolated from digital switching noise to maintain SNR.
Place the ADS8900B close to the signal source to minimize trace length and reduce noise pickup. Use a solid ground plane and separate analog and digital ground areas, connecting them at a single point. Route the SPI lines away from analog inputs to avoid crosstalk. The VQFN package has an exposed pad; solder it to the ground plane for thermal and electrical performance.
Avoid exceeding the absolute maximum ratings on any pin. Ensure the reference voltage is stable and within the specified range. The SPI interface must be configured correctly for the desired sampling rate and data format. Do not leave unused pins floating; tie them to appropriate levels. Also, consider the input common-mode range to avoid saturation.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified. Halogen-free status not specified in provided data.
