ADS7066 - 16-Bit 8-Ch SAR ADC with GPIOs | Texas Instruments
MPN: ADS7066 ✓ 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 ADS7066 — 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:
ADS7067
✅ Drop-In✓ In Stock
$4.16 / Unit
View Datasheet →ADS1220
✅ Drop-In✓ In Stock
$2.89 / Unit
View Datasheet →ADS8887
✅ Drop-In✓ In Stock
$5.5 / Unit
View Datasheet →ADS8900B
✅ Drop-In✓ In Stock
$8.1 / Unit
View Datasheet →ADS7066 Maximum Ratings & Electrical Characteristics
| Resolution | 16 bits |
| Number of Channels | 8 |
| Sampling Rate | 250 kSPS |
| Architecture | SAR |
| Input Type | Single-ended |
| Interface | SPI |
| Internal Reference | 2.5 V capless |
| Supply Voltage | 3.0 V to 3.6 V |
| Operating Temperature Range | -40°C to +125°C |
| Package | 16-WQFN (3x3) / DSBGA (1.62x1.62) |
| GPIO | 8 configurable as digital I/O |
| Averaging Filter | Programmable |
| Reference Buffer | Integrated |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ADS7066 Pin Configuration
| Pin 1 | AVDD — Analog power supply |
| Pin 2 | AIN0 — Analog input channel 0 |
| Pin 3 | AIN1 — Analog input channel 1 |
| Pin 4 | AIN2 — Analog input channel 2 |
| Pin 5 | AIN3 — Analog input channel 3 |
| Pin 6 | AIN4 — Analog input channel 4 |
| Pin 7 | AIN5 — Analog input channel 5 |
| Pin 8 | AIN6 — Analog input channel 6 |
| Pin 9 | AIN7 — Analog input channel 7 |
| Pin 10 | GND — Ground |
| Pin 11 | SCLK — SPI clock |
| Pin 12 | DIN — SPI data input |
| Pin 13 | DOUT — SPI data output |
| Pin 14 | CS — Chip select |
| Pin 15 | GPIO0 — General purpose I/O |
| Pin 16 | GPIO1 — General purpose I/O |
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
ADS7066 is suitable for 6 applications: Motor Control, Industrial Process Control, Data Acquisition Systems, Portable Instrumentation, Battery-Powered Devices, Medical Monitoring.
Motor Control
The ADS7066's 8-channel configurability and 250-kSPS sampling rate enable precise current and voltage sensing in motor control loops. Its small WQFN package fits compact drives, and the integrated reference reduces external components. The SPI interface allows fast data transfer to MCUs like TMS320F28069, ensuring real-time control.
Recommended
Industrial Process Control
In industrial process control, the ADS7066 provides high-resolution (16-bit) conversion of sensor signals such as temperature and pressure. Its wide operating temperature range (-40°C to +125°C) ensures reliability in harsh environments. The programmable averaging filter reduces noise, improving measurement accuracy. The GPIOs can be used for alarm outputs or switch control.
Recommended
Data Acquisition Systems
The ADS7066 is ideal for data acquisition systems requiring multiple analog inputs. Its 8 channels can be configured as analog inputs, digital inputs, or outputs, providing flexibility. The 250-kSPS sampling rate and 16-bit resolution capture fast, precise signals. The integrated reference simplifies design, and the SPI interface connects easily to FPGAs or MCUs.
Recommended
Portable Instrumentation
For portable instruments, the ADS7066's low power consumption and small DSBGA package (1.62x1.62 mm) are critical. It operates from a 3.0-V to 3.6-V supply, compatible with battery power. The capless reference saves board space, and the GPIOs can control backlighting or switches. The SPI interface minimizes pin count, ideal for compact designs.
Recommended
Battery-Powered Devices
The ADS7066 is well-suited for battery-powered devices due to its low power consumption and small footprint. It can monitor multiple battery cells or environmental sensors. The integrated reference reduces external parts, extending battery life. The GPIOs can be used for status LEDs or control signals, and the SPI interface allows efficient communication with low-power MCUs.
Recommended
Medical Monitoring
In medical monitoring, the ADS7066's high resolution and small size enable precise measurement of biosignals. Its 8 channels can acquire multiple signals simultaneously, such as ECG and temperature. The low power consumption is suitable for wearable devices. The integrated reference and buffer ensure stable performance, and the SPI interface connects to medical-grade MCUs.
Recommended
Recommended Products Summary
Engineering reference data for ADS7066 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS7067 | ADS1220 | ADS8887 | ADS8900B |
|---|---|---|---|---|---|
| Package | 16-WQFN (3x3) | 16-WQFN (3x3) | 16-WQFN (3x3) | 16-WQFN (3x3) | 16-WQFN (3x3) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 16 bits | 16 bits | 24 bits | 18 bits | 20 bits |
| Number of Channels | 8 | 4 | 4 | 1 | 1 |
| Sampling Rate | 250 kSPS | 250 kSPS | 2 kSPS | 1 MSPS | 1 MSPS |
| Interface | SPI | SPI | SPI | SPI | SPI |
| Internal Reference | Yes (2.5V capless) | Yes (2.5V capless) | Yes (2.048V) | No (external) | No (external) |
| GPIO | 8 configurable | 4 configurable | 2 | None | None |
Key Differentiators
- 8 configurable channels (vs ADS7067)
- Integrated capless reference (vs ADS8887)
- Higher sampling rate (vs ADS1220)
Design Notes
Decouple the AVDD pin with a 1-µF ceramic capacitor placed as close as possible to the pin. A 0.1-µF capacitor in parallel can help filter high-frequency noise. The ADS7066 operates from 3.0V to 3.6V, so ensure the supply is stable and within this range.
For optimal performance, route analog input traces away from digital lines (SCLK, DIN, DOUT, CS) to minimize coupling. Use a solid ground plane and connect the thermal pad (if present) to ground. Keep the SPI lines short and matched to reduce signal integrity issues.
Do not exceed the absolute maximum ratings on any pin. The capless reference requires no external capacitor, but ensure the REF pin (if available) is not loaded. When configuring channels as digital I/O, ensure voltage levels are within the digital input range to avoid damage.
Compliance Information
RoHS compliant per TI product page. AEC-Q100 not applicable for this non-automotive part.
