ADS1115IDGSR-Q1 - 16-Bit I2C ADC, 860SPS | Texas Instruments
MPN： ADS1115IDGSR-Q1 ✓ 啟用中ADS1115IDGSR-Q1 概覽
An ADC (analog-to-digital converter) is a mixed-signal device that converts continuous analog voltages into discrete digital values. Within the converter hierarchy, the ADS1115 is a delta-sigma (over-sampling) ADC, a topology prized for high resolution and low noise at modest sample rates, sitting above SAR ADCs in resolution and below integrating ADCs in speed. It connects to any host MCU or processor via an I2C bus, making it a power-management and sensor-measurement building block.
Key features include 16-bit resolution with up to 860 samples per second (SPS) conversion rate, an I2C interface supporting four selectable addresses, and a PGA with gain settings that allow full-scale ranges down to the +/-256 mV range for direct connection of small signals. The integrated digital comparator supports alert-based operation, reducing host polling overhead. Conversion rate and duty cycling support low average power consumption in battery-backed systems.
The delta-sigma architecture oversamples the input and applies digital decimation filtering, yielding excellent linearity and noise performance without external precision components. Because reference, oscillator, and PGA are on-chip, external BOM count stays minimal and channel-to-channel measurements remain consistent.
Typical applications include automotive battery-voltage and current monitoring, sensor measurement in body and chassis modules, battery management systems (BMS) auxiliary sensing, factory automation analog input modules, and precision portable instrumentation. The Q1 qualification makes it a natural fit alongside TI automotive power and monitoring devices.
Design tip: the input pins must not exceed VDD + 0.3V; for measuring rails above the supply, use a resistive divider and match the source impedance to the PGA input requirements to preserve accuracy.
直接替換替代品，適用於 ADS1115IDGSR-Q1 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ADS1115IDGSR-Q1 （相同外形與佔位） — 差異在於 Package, Supply Voltage.
ADS1115IDGSR
✅ 直接替換✗ 缺貨
$2.72 / 單位
查看資料表 →ADS1115QDGSRQ1
✅ 直接替換📋 參考替代品（不在目錄中）
ADS1114IDGSR
✅ 直接替換📋 參考替代品（不在目錄中）
ADS1015IDGSR
✅ 直接替換📋 參考替代品（不在目錄中）
ADS1115BQDGSRQ1
✅ 直接替換📋 參考替代品（不在目錄中）
MCP3424-E/SL
⚡ 相同封裝 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADS1115IDGSR-Q1 最大額定值與電氣特性
| 解析度 | 16 bit |
| Number of Input Channels | 4 (2 differential or 4 single-ended) |
| 取樣率 | 8 to 860 SPS |
| Architecture | Delta-Sigma |
| 介面類型 | I2C |
| Input Type | Differential / Single-Ended |
| PGA Gains | 2/3, 1, 2, 4, 8, 16 |
| Full-Scale Range (lowest PGA) | +/-256 mV |
| 供應電壓 | 2 V to 5.5 V |
| Integrated Features | PGA, Voltage Reference, Oscillator, Comparator |
| 封裝 | 10-VSSOP (DGS) |
| 工作溫度 | -40C to +125C |
| Qualification | AEC-Q100 (automotive) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
ADS1115IDGSR-Q1 腳位配置
| 腳位 1 | ADDR — I2C address select |
| 腳位 2 | ALERT/RDY — Comparator output or conversion-ready |
| 腳位 3 | GND — Ground |
| 腳位 4 | AIN0 — Analog input channel 0 |
| 腳位 5 | AIN1 — Analog input channel 1 |
| 腳位 6 | AIN2 — Analog input channel 2 |
| 腳位 7 | AIN3 — Analog input channel 3 |
| 腳位 8 | VDD — Power supply, 2V to 5.5V |
| 腳位 9 | SDA — I2C serial data |
| 腳位 10 | SCL — I2C serial clock |
典型應用
ADS1115IDGSR-Q1 適用於 6 應用s: Automotive Battery Monitoring, Battery Management Systems (BMS), Industrial Analog Input Modules, Portable and Battery-Powered Instrumentation, Temperature and Sensor Acquisition, Power Supply Telemetry.
Automotive Battery Monitoring
The ADS1115IDGSR-Q1's AEC-Q100 qualification, -40C to +125C range, and 16-bit resolution with +/-256mV minimum full-scale make it ideal for automotive battery voltage sensing. Placed on the I2C bus of a body-control module or BMS slave, it digitizes divider-scaled battery rails with high linearity, while the integrated ALERT comparator flags undervoltage or overvoltage events without host polling.
推薦
Battery Management Systems (BMS)
In BMS auxiliary sensing, the ADS1115IDGSR-Q1 measures cell balancing status, pack voltage, and shunt-based current with 16-bit precision. The PGA gain of 16x provides a +/-256mV full-scale range suited to small shunt signals, and the internal reference removes external precision components. Its 860SPS maximum rate is sufficient for slow monitoring loops that run alongside dedicated cell supervisors.
推薦
Industrial Analog Input Modules
Factory automation I/O modules use the ADS1115IDGSR-Q1 to add four single-ended or two differential analog channels over a simple two-wire I2C bus. The internal PGA and reference eliminate signal-conditioning front-ends for 0-5V-class sensors, and its 860SPS rate covers most process-variable acquisition. The digital comparator supports local threshold alarms directly at the sensor node.
推薦
Portable and Battery-Powered Instrumentation
The ADS1115IDGSR-Q1's low-power operation and duty-cycling between 8SPS and 860SPS let designers trade speed for average current in portable meters and data loggers. Its 10-pin VSSOP occupies minimal board area, and the integrated oscillator and reference remove crystal and reference BOM items, critical for compact handheld designs where the ADC digitizes bridge and divider sensors.
推薦
Temperature and Sensor Acquisition
Precision analog-output sensors such as RTD bridges and thermistor dividers benefit from the ADS1115IDGSR-Q1's 16-bit noise performance and PGA down to the +/-256mV range, allowing direct connection without additional gain stages. Differential input mode rejects ground noise common in sensor wiring, and the I2C interface with four address options lets multiple ADCs share one MCU bus.
推薦
Power Supply Telemetry
On DC-DC converter boards, the ADS1115IDGSR-Q1 digitizes output voltage dividers and shunt signals for PMBus-less health telemetry. With a 2V to 5.5V supply, it runs from typical 3.3V or 5V rails, and its I2C interface integrates with system MCUs. The comparator ALERT output enables autonomous fault flagging such as output undervoltage during sequencing events.
推薦
推薦產品摘要
工程參考資料，適用於 ADS1115IDGSR-Q1 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ADS1115IDGSR | ADS1115QDGSRQ1 | ADS1114IDGSR | ADS1015IDGSR | MCP3424-E/SL |
|---|---|---|---|---|---|---|
| Package | VSSOP-10 (DGS) | VSSOP-10 (DGS) - same | VSSOP-10 (DGS) - same | VSSOP-10 (DGS) - same | VSSOP-10 (DGS) - same | VSSOP-10 (SL) - different pinout |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Microchip Technology |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 12 bit | 12 to 18 bit |
| Max Sample Rate | 860 SPS | 860 SPS | 860 SPS | 860 SPS | 3300 SPS | 240 SPS |
| Input Channels | 4 (2 diff) | 4 (2 diff) | 4 (2 diff) | 1 differential | 4 (2 diff) | 4 (2 diff) |
| Interface | I2C | I2C | I2C | I2C | I2C | I2C |
| Qualification | AEC-Q100 | None (industrial) | AEC-Q100 | None (industrial) | None (industrial) | None (industrial) |
| PGA | Yes (2/3x to 16x) | Yes | Yes | Yes | Yes | Yes (1x to 8x) |
主要差異化特點
- Automotive AEC-Q100 qualification with 4-channel MUX (對比ADS1115IDGSR)
- Higher maximum sample rate in same footprint (對比ADS1015IDGSR)
- Integrated 4-channel MUX (對比ADS1114IDGSR)
設計說明
Place a 0.1uF ceramic decoupling capacitor within 2mm of the VDD pin (pin 8) with a solid via to the ground plane. Keep analog input traces (AIN0-AIN3) short and away from SDA/SCL switching lines; if the source impedance is high, add an RC filter (e.g., 1k ohm / 10nF) at the input pins to reduce noise pickup without significantly settling error at 8SPS rates.
Input pins must stay within GND - 0.3V to VDD + 0.3V; clamp or divide any signal exceeding the supply. Choose ADDR pin level carefully - it sets one of four I2C addresses (0x48 to 0x4B); floating inputs are not allowed on ADDR. Pull up SDA/SCL with 2.2k to 4.7k ohm resistors on 3.3V buses; long buses at 400kHz may need stronger pull-ups.
For battery-powered designs, use the internal duty-cycling by writing the low data-rate register (8SPS) and powering down between conversions via the single-shot OS bit - this dramatically reduces average current compared with continuous mode. The ALERT pin can double as a conversion-ready output (RDY mode) to wake the host MCU only when new data is available.
合規資訊
AEC-Q100 qualified automotive variant (ADS1115-Q1 family). RoHS/REACH per TI product page.
