ADS8887 - 18-Bit 100kSPS SAR ADC | Texas Instruments
MPN: ADS8887 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $4.95 | $495.00 |
| 500 | $4.2 | $2,100.00 |
| 1,000 | $3.75 | $3,750.00 |
Drop-in alternatives for ADS8887 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADS8887IDGSR
✅ Drop-In📋 Reference alternative (not in catalog)
ADS8887IDRCT
✅ Drop-In📋 Reference alternative (not in catalog)
ADS8866
✅ Drop-In📋 Reference alternative (not in catalog)
ADS8885
✅ Drop-In📋 Reference alternative (not in catalog)
AD7949BCPZRL7
✅ Drop-In✓ In Stock
$5.63 / Unit
View Datasheet →ADS8887 Maximum Ratings & Electrical Characteristics
| Resolution | 18 bit |
| Sampling Rate | 100 kSPS |
| Input Type | True Differential |
| Number of Input Channels | 1 |
| Interface | SPI |
| 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 |
| INL | ±1 LSB |
| SNR | 100 dB |
| Input Bandwidth | 10 MHz |
| Power Consumption | 1.2 mW at 100 kSPS |
| Operating Temperature Range | -40°C to +85°C |
| Package | 10-VSSOP |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ADS8887 Pin Configuration
| Pin 1 | AVDD — Analog power supply (2.7V to 3.6V) |
| Pin 2 | IN+ — Positive analog input |
| Pin 3 | IN- — Negative analog input |
| Pin 4 | GND — Ground |
| Pin 5 | REF — Reference voltage input (2.5V to 5V) |
| Pin 6 | DVDD — Digital power supply (1.65V to 3.6V) |
| Pin 7 | SCLK — Serial clock input |
| Pin 8 | SDO — Serial data output |
| Pin 9 | CS — Chip select (active low) |
| Pin 10 | PD — Power-down control (active high) |
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, Industrial Automation, Medical Instrumentation, Portable Instrumentation, IoT and Smart Sensors, Test and Measurement.
Precision Data Acquisition
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 small signals. The SPI interface simplifies connection to microcontrollers, and the low power consumption enables portable designs. With a reference range of 2.5 V to 5 V, it can accommodate various signal levels without external scaling.
Recommended
Industrial Automation
In industrial automation, the ADS8887 provides high-resolution conversion for process control and monitoring. Its wide operating temperature range (-40°C to +85°C) ensures reliability in harsh environments. The true-differential input is ideal for bridge sensors and thermocouples, rejecting common-mode interference. The SPI interface allows easy integration with PLCs and industrial microcontrollers, while the low power consumption reduces heat generation in control cabinets.
Recommended
Medical Instrumentation
The ADS8887 is well-suited for medical devices such as patient monitors and diagnostic equipment. Its high resolution and low noise ensure accurate measurement of physiological signals. The true-differential input helps reject common-mode noise from the human body and electrical interference. The miniature VSSOP package saves space in portable medical devices, and the low power consumption extends battery life. The SPI interface enables seamless data transfer to processing units.
Recommended
Portable Instrumentation
For portable instruments like handheld multimeters and data loggers, the ADS8887 offers a balance of performance and power efficiency. Its 1.2-mW power consumption at 100 kSPS is ideal for battery-powered devices. The power-down mode further reduces current to microamperes, extending battery life. The true-differential input allows direct connection to various sensors, and the SPI interface simplifies firmware development. The small package enables compact product designs.
Recommended
IoT and Smart Sensors
In IoT applications, the ADS8887 provides high-precision analog-to-digital conversion for smart sensors. Its low power consumption is crucial for battery-operated nodes, and the power-down mode enables duty-cycled operation. The true-differential input supports various sensor types, including strain gauges and accelerometers. The SPI interface allows easy connection to low-power microcontrollers like MSP430. The miniature package fits into compact sensor modules.
Recommended
Test and Measurement
The ADS8887 is used in test and measurement equipment such as spectrum analyzers and data acquisition cards. Its 18-bit resolution and 100-kSPS sampling rate provide high dynamic range for accurate signal analysis. The true-differential input allows measurement of balanced signals, and the SPI interface enables high-speed data transfer to FPGAs or DSPs. The device's low power consumption is beneficial in multi-channel systems where many ADCs are used.
Recommended
Recommended Products Summary
Engineering reference data for ADS8887 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS8887IDGSR | ADS8887IDRCT | ADS8866 | ADS8885 | AD7949BCPZRL7 |
|---|---|---|---|---|---|---|
| Package | 10-VSSOP | 10-VSSOP | 10-VSSOP | 10-VSSOP | 10-VSSOP | 10-VSSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Resolution | 18 bit | 18 bit | 18 bit | 16 bit | 16 bit | 18 bit |
| Sampling Rate | 100 kSPS | 100 kSPS | 100 kSPS | 100 kSPS | 100 kSPS | 250 kSPS |
| Input Type | True Differential | True Differential | True Differential | Pseudo-Differential | True Differential | True Differential |
| Reference Voltage | 2.5V to 5V | 2.5V to 5V | 2.5V to 5V | 2.5V to 5V | 2.5V to 5V | 2.5V to 5V |
| Power Consumption | 1.2 mW at 100 kSPS | 1.2 mW at 100 kSPS | 1.2 mW at 100 kSPS | 1.2 mW at 100 kSPS | 1.2 mW at 100 kSPS | 1.5 mW at 250 kSPS |
| Interface | SPI | SPI | SPI | SPI | SPI | SPI |
Key Differentiators
- True-differential input (vs ADS8866)
- Higher resolution (vs ADS8885)
- Lower power consumption (vs AD7949BCPZRL7)
Design Notes
Provide separate analog and digital supply rails (AVDD and DVDD) with adequate decoupling. Use 0.1-µF and 10-µF capacitors close to the AVDD and DVDD pins. The reference input (REF) should be bypassed with a 10-µF capacitor to ensure stable operation. A low-impedance reference source is essential for maintaining accuracy.
Place the ADS8887 close to the signal source to minimize trace length and reduce noise pickup. Use a solid ground plane and avoid routing digital signals near the analog input pins. Keep the SPI lines (SCLK, SDO, CS) away from the analog input to prevent coupling. Consider using a ground guard ring around the analog input area.
Ensure the input signal is within the common-mode range of the ADC. For true-differential inputs, both IN+ and IN- must be driven with appropriate signals. Do not leave the PD pin floating; tie it to GND for normal operation. Also, verify that the reference voltage does not exceed the AVDD supply, as this can cause incorrect conversions.
Compliance Information
RoHS compliant per TI product page. Other compliance data not specified in the provided data.
