ADS8887 - 18-Bit 100kSPS SAR ADC | Texas Instruments
MPN: ADS8887 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.12 | $3,060.00 |
| 1,000 | $5.5 | $5,500.00 |
Drop-in alternatives for ADS8887 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:
ADS8887IDGSR
β Drop-Inπ Reference alternative (not in catalog)
ADS8887IDGS
β Drop-Inπ Reference alternative (not in catalog)
ADS8866
β Drop-Inπ Reference alternative (not in catalog)
ADS8685
β Drop-Inπ Reference alternative (not in catalog)
ADS8688
β Drop-Inπ Reference alternative (not in catalog)
ADS8887 Maximum Ratings & Electrical Characteristics
| Resolution | 18 bit |
| Sampling Rate | 100 kSPS |
| Number of Input Channels | 1 |
| Input Type | True-Differential |
| Architecture | SAR |
| Reference Voltage | 2.5 V to 5 V |
| Analog Supply Voltage (AVDD) | 2.7 V to 3.6 V |
| Digital Supply Voltage (DVDD) | 1.65 V to 3.6 V |
| Interface | SPI |
| INL | Β±1 LSB |
| SNR | 100 dB |
| Input Bandwidth | 10 MHz |
| Power-Down Current | Microamperes |
| Package | 10-VSSOP |
| Operating Temperature Range | -40Β°C to +85Β°C |
ADS8887 Pin Configuration
| Pin 1 | AVDD β Analog power supply |
| Pin 2 | IN+ β Positive analog input |
| Pin 3 | IN- β Negative analog input |
| Pin 4 | GND β Ground |
| Pin 5 | REF β Reference voltage input |
| 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 (active low) |
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
ADS8887 is suitable for 6 applications: Precision Data Acquisition Systems, Industrial Automation, Medical Instrumentation, Portable Instrumentation, IoT Devices, Test and Measurement.
Precision Data Acquisition Systems
The ADS8887's 18-bit resolution and 100 kSPS sampling rate make it ideal for precision data acquisition systems. Its true-differential input rejects common-mode noise, ensuring accurate measurement of low-level signals. The SPI interface simplifies connection to microcontrollers, and the low power consumption is beneficial for portable systems. With an SNR of 100 dB and INL of Β±1 LSB, it delivers high accuracy for industrial and laboratory instrumentation.
Recommended
Industrial Automation
In industrial automation, the ADS8887 provides high-resolution conversion for process control and monitoring. Its 18-bit resolution allows precise measurement of sensor outputs, while the true-differential input handles noisy industrial environments. The wide reference voltage range (2.5V to 5V) accommodates various signal levels without additional scaling. The device's small VSSOP package and low power consumption make it suitable for distributed I/O modules and field transmitters.
Recommended
Medical Instrumentation
The ADS8887 is well-suited for medical instrumentation such as patient monitors and diagnostic equipment. Its high resolution and low noise (SNR 100 dB) enable accurate measurement of physiological signals like ECG and EEG. The true-differential input rejects common-mode interference from the body, and the low power consumption supports battery-operated devices. The SPI interface allows easy integration with medical-grade microcontrollers, and the small package fits compact designs.
Recommended
Portable Instrumentation
For portable instrumentation, the ADS8887 offers a balance of high resolution and low power consumption. Its power-down mode reduces current to microamperes, extending battery life. The 18-bit resolution ensures accurate measurements in handheld devices like multimeters and data loggers. The true-differential input allows direct connection to bridge sensors, and the SPI interface simplifies communication with low-power microcontrollers. The miniature VSSOP package is ideal for space-constrained designs.
Recommended
IoT Devices
The ADS8887 is suitable for IoT devices that require high-precision analog-to-digital conversion. Its low power consumption and power-down mode are critical for battery-powered sensors. The 18-bit resolution enables accurate measurement of environmental parameters like temperature, humidity, and pressure. The true-differential input rejects noise from wireless transmitters, and the SPI interface allows seamless integration with IoT microcontrollers. The small package supports compact sensor nodes.
Recommended
Test and Measurement
In test and measurement equipment, the ADS8887 provides high-resolution digitization for accurate signal analysis. Its 100 kSPS sampling rate and 18-bit resolution allow precise capture of waveforms. The true-differential input is ideal for measuring differential signals in bridge circuits and sensors. The wide reference voltage range enables flexible input scaling, and the SPI interface supports high-speed data transfer to FPGAs or DSPs. The device's low power consumption is beneficial for benchtop instruments.
Recommended
Recommended Products Summary
Engineering reference data for ADS8887 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS8887IDGSR | ADS8887IDGS | ADS8866 | ADS8685 | ADS8688 |
|---|---|---|---|---|---|---|
| Resolution | 18 bit | 18 bit | 18 bit | 16 bit | 16 bit | 16 bit |
| Sampling Rate | 100 kSPS | 100 kSPS | 100 kSPS | 100 kSPS | 500 kSPS | 500 kSPS |
| Input Type | True-Differential | True-Differential | True-Differential | Pseudo-Differential | Single-Ended | Single-Ended |
| Reference Voltage | 2.5 V to 5 V | 2.5 V to 5 V | 2.5 V to 5 V | 2.5 V to 5 V | 2.5 V to 5 V | 2.5 V to 5 V |
| Interface | SPI | SPI | SPI | SPI | SPI | SPI |
| Package | 10-VSSOP | 10-VSSOP | 10-VSSOP | 10-VSSOP | 10-VSSOP | 10-VSSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Power-Down Current | Microamperes | Microamperes | Microamperes | Microamperes | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- 18-bit resolution (vs ADS8866)
- True-differential input (vs ADS8685)
- Lower power consumption (vs ADS8688)
Design Notes
Provide a low-impedance reference source and adequate decoupling on the AVDD and DVDD pins. The reference input should be bypassed with a 10-Β΅F capacitor to ensure stable operation. Additionally, the analog input should be driven by a low-impedance source, such as an op-amp, to achieve full performance.
Place the ADS8887 close to the signal source to minimize trace inductance and noise pickup. Use a solid ground plane and separate analog and digital ground areas, connecting them at a single point. Keep the SPI lines short and avoid routing them near high-speed digital signals to reduce crosstalk.
Ensure the reference voltage is stable and within the specified range (2.5V to 5V). Avoid exceeding the absolute maximum ratings on any pin. For true-differential operation, ensure the IN- input is properly driven; if connecting IN- to GND, use a pseudo-differential configuration as in the ADS8866, but note the performance difference.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified.
