ADS7066 - 16-Bit 8-Ch 250kSPS SAR ADC | Texas Instruments
料号： ADS7066 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.55 | $3.55 |
| 10 | $3.19 | $31.90 |
| 100 | $2.75 | $275.00 |
| 500 | $2.4 | $1,200.00 |
| 1,000 | $2.1 | $2,100.00 |
ADS7066 概述
An ADC (analog-to-digital converter) converts continuous analog signals into discrete digital values for digital processing. SAR ADCs are a dominant ADC architecture for industrial, medical, and automotive systems where high precision at moderate speed is required, balancing resolution, speed, and power. The ADS7066 belongs to the precision data converter family that bridges the analog world to digital signal processing.
Key features include eight channels configurable as any combination of analog inputs, digital inputs, or digital outputs (GPIOs), programmable averaging filters that improve effective resolution and reduce noise, and an SPI interface for simple integration with MCUs and DSPs. The integrated capless 2.5-V reference eliminates external reference components, saving board space and cost.
Technically, the ADS7066 uses a high-performance SAR core with a capless reference and reference buffer that isolates the reference from the sampling capacitor, maintaining accuracy at full throughput. It operates from a single 3.0-V to 3.6-V supply with low power consumption and a wide operating temperature range of -40C to +125C for industrial environments. GPIO functionality can control external components, replacing discrete I/O expanders.
Typical applications include motor control current and voltage sensing, industrial process control and data acquisition (DAQ), and portable or battery-powered instrumentation where small size and low power matter. The high channel count and configurability allow a single chip to replace multiple discrete ADCs and GPIO devices.
When designing with the ADS7066, decouple the supply properly, keep analog input traces short to minimize noise, and isolate the SPI bus from noisy digital lines. For the DSBGA package, use careful reflow soldering per TI mounting recommendations.
直接替换替代料： ADS7066 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADS7066 （相同外形与封装尺寸） ——差异在于 Architecture, Interface, Mounting Type, Number of Channels, Package.
快速对比工具——选择替代料号进行并排对比：
ADS7065
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADS7067
✅ 直接替换✓ 有现货
$3.85 / 个
查看数据手册 →ADS7066IRTER
✅ 直接替换📋 参考替代料（不在目录中）
ADS7066 最大额定值与电气特性
| 分辨率 | 16 bit |
| Number of Channels | 8 (configurable as analog inputs, digital inputs, or digital outputs) |
| 采样率 | 250 kSPS |
| Architecture | Successive Approximation Register (SAR) |
| 接口 | SPI |
| Internal Reference | 2.5 V capless, with reference buffer |
| Integrated LDO | Yes |
| 电源电压 | 3 V to 3.6 V |
| Averaging Filters | Programmable |
| GPIOs | Yes, channel pins configurable as GPIO |
| 工作温度 | -40C to +125C |
| 封装 | 16-WQFN (3x3 mm) |
| Alternate Package | 16-DSBGA (1.62 mm x 1.62 mm) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Typical Application | Motor control, industrial DAQ, portable instrumentation |
ADS7066 16-dsbga (1.62 mm x 1.62 mm) 引脚配置指南
ADS7066（16-dsbga (1.62 mm x 1.62 mm) 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： ADS7066.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ADS7066 适用于 6 应用s: Motor Control Current and Voltage Sensing, Industrial Data Acquisition (DAQ), Portable and Battery-Powered Instrumentation, Battery Management System Telemetry, Test and Measurement Probes, Factory Automation and PLC I/O Modules.
Motor Control Current and Voltage Sensing
The ADS7066 fits motor control because its 250-kSPS throughput resolves fast phase-current transients in FOC loops, and its eight channels monitor multiple shunt currents plus DC bus voltage with a single device. The programmable averaging filter lowers noise on low-level shunt signals without external analog filtering. Placed after a TI current-sense amplifier such as the INA240, the integrated 2.5-V reference and buffer remove reference-drift concerns, while single-shot SPI-triggered conversions let the MCU synchronize sampling with the PWM cycle for deterministic control-loop timing.
推荐
Industrial Data Acquisition (DAQ)
For industrial process control and DAQ modules, the ADS7066 consolidates eight sensor channels into one SPI device, replacing multiple discrete ADCs and an I/O expander since each channel can act as a GPIO. Its -40C to +125C operating range suits factory-floor environments, and the capless 2.5-V internal reference reduces BOM cost across large production volumes. At 250 kSPS the device covers vibration, pressure, and temperature sensor channels with programmable averaging improving effective resolution on slow-moving process variables, while the 3x3-mm WQFN keeps the analog front end compact on dense I/O cards.
推荐
Portable and Battery-Powered Instrumentation
The ADS7066 is suited to portable instrumentation because it operates from a single 3.0-V to 3.6-V rail with low power consumption and full performance at all throughputs. The 16-ball DSBGA version occupies only 1.62 mm x 1.62 mm, and the integrated capless reference plus LDO eliminate entire reference circuit blocks, shrinking handheld and wearable designs. Battery-powered multimeters, environmental sensors, and medical monitoring devices benefit from single-shot conversion mode, where the ADC draws power only during sampling windows, extending battery life while retaining 16-bit precision for slow diagnostic measurements.
推荐
Battery Management System Telemetry
In battery management, the ADS7066 digitizes cell-voltage divider and temperature-sensor channels that feed secondary protection decisions. Its eight configurable channels handle several NTC thermistors and monitor points in one chip, and the internal 2.5-V reference keeps ratiometric NTC readings accurate without an external reference IC. The SPI interface connects directly to the BMS MCU, while the -40C to +125C range covers automotive under-hood conditions. Programmable averaging filters suppress switching noise from adjacent DC-DC converters, and GPIO-configurable pins can drive balance-indicator or fault-report outputs directly.
推荐
Test and Measurement Probes
Handheld meters and probe modules use the ADS7066 to digitize multiple measurement front ends - voltage dividers, current shunts, and auxiliary sensors - through a single SPI-linked ADC. The 16-bit resolution captures fine detail on low-level signals, while 250-kSPS sampling supports burst capture of transients. The integrated reference buffer maintains accuracy even when the analog supply is shared with a display backlight or wireless module, a common issue in compact instruments. Its low power at reduced throughput rates lets designers scale sampling speed to battery budget without firmware architecture changes.
推荐
Factory Automation and PLC I/O Modules
PLC analog input modules use the ADS7066 to convert up to eight 0-10 V or 4-20 mA conditioned channels per device, with the SPI bus daisy-chaining multiple converters on one controller port. Channel-configurable GPIOs replace a separate I/O expander for relay status or range-select lines, cutting component count on dense I/O boards. The industrial -40C to +125C rating and programmable averaging deliver the noise performance demanded by 12-bit-plus effective accuracy specifications, and the internal capless reference ensures channel-to-channel matching without individual trims during production calibration.
推荐
推荐产品汇总
工程参考数据： ADS7066 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ADS7065 | ADS7067 | AD7689 |
|---|---|---|---|---|
| Package | 16-WQFN (3x3 mm) | 16-WQFN (3x3 mm) - same | 16-WQFN (3x3 mm) - same | LFCSP/QFN - different |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Resolution | 16 bit | 14 bit | 16 bit | 16 bit |
| Channels | 8 | 8 | 16 | 16 |
| Sampling Rate | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS |
| Internal Reference | Yes (2.5 V capless) | Yes (2.5 V capless) | Yes (2.5 V capless) | Yes (internal bandgap) |
| Interface | SPI | SPI | SPI | SPI (different framing) |
| Drop-in Replacement | - | Yes (same pinout) | Same family - verify pin mapping | No - PCB rework required |
关键差异点
- Integrated capless 2.5-V reference with buffer （对比 AD7689)
- Higher resolution than family sibling （对比 ADS7065)
- Configurable analog/digital channel pins （对比 ADS7067)
设计说明
Decouple the 3.3-V analog supply with a 1-uF ceramic capacitor placed within 2 mm of the AVDD pin, plus a 0.1-uF capacitor for high-frequency noise. Keep the analog input traces short and route them away from the SPI clock lines, which can couple switching noise into the SAR sampling capacitor and degrade effective resolution at full 250-kSPS throughput.
Even though the ADS7066 integrates a capless 2.5-V reference and reference buffer, the source impedance driving each analog input still affects settling during acquisition. Keep the input RC filter resistance low enough for the SAR input to settle within the acquisition window, or buffer high-impedance sources with a precision op-amp such as the OPA388 as recommended on the TI E2E data converters forum.
For the 16-ball DSBGA (1.62 mm x 1.62 mm) version, follow TI wafer-level chip-scale package mounting guidelines: use NSMD pads, control reflow profile precisely, and avoid manual rework. For prototyping or easier assembly, prefer the 16-WQFN (3x3 mm) ADS7066IRTER, which uses standard SMT assembly processes and has an exposed pad for ground connection.
合规信息
RoHS compliant and lead-free per TI product listing. The -40C to +125C industrial temperature variant is standard; AEC-Q100 qualification status is not stated in provided data.
