ADS1115IDGSR-Q1 - 16-Bit I2C ADC, 860SPS | Texas Instruments
部品番号: ADS1115IDGSR-Q1 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.88 | $28.80 |
| 100 | $2.45 | $245.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.78 | $1,780.00 |
ADS1115IDGSR-Q1 概要
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.
ドロップイン代替品: ADS1115IDGSR-Q1 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ADS1115IDGSR-Q1 （同一形状・フットプリント） — 相違点: Package, Supply Voltage.
クイック比較ツール — 並列比較する代替部品を選択:
ADS1115IDGSR
✅ ドロップイン✓ 在庫あり
$2.72 / 個
データシートを見る →ADS1115QDGSRQ1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADS1114IDGSR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADS1015IDGSR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADS1115BQDGSRQ1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MCP3424-E/SL
⚡ 同一パッケージ ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ADS1115IDGSR-Q1 最大定格＆電気的特性
| 分解能 | 16 bit |
| Number of Input Channels | 4 (2 differential or 4 single-ended) |
| サンプリングレート | 8 to 860 SPS |
| Architecture | Delta-Sigma |
| インターフェースタイプ | I2C |
| Input Type | Differential / Single-Ended |
| PGA Gains | 2/3, 1, 2, 4, 8, 16 |
| Full-Scale Range (lowest PGA) | +/-256 mV |
| 電源電圧 | 2 V to 5.5 V |
| Integrated Features | PGA, Voltage Reference, Oscillator, Comparator |
| パッケージ | 10-VSSOP (DGS) |
| 動作温度 | -40C to +125C |
| Qualification | AEC-Q100 (automotive) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
ADS1115IDGSR-Q1 ピン構成
| ピン 1 | ADDR — I2C address select |
| ピン 2 | ALERT/RDY — Comparator output or conversion-ready |
| ピン 3 | GND — Ground |
| ピン 4 | AIN0 — Analog input channel 0 |
| ピン 5 | AIN1 — Analog input channel 1 |
| ピン 6 | AIN2 — Analog input channel 2 |
| ピン 7 | AIN3 — Analog input channel 3 |
| ピン 8 | VDD — Power supply, 2V to 5.5V |
| ピン 9 | SDA — I2C serial data |
| ピン 10 | SCL — I2C serial clock |
主な用途
ADS1115IDGSR-Q1 の用途: 6 件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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ADS1115IDGSR-Q1 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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) |
主な差別化要因
- Automotive AEC-Q100 qualification with 4-channel MUX （vs ADS1115IDGSR)
- Higher maximum sample rate in same footprint （vs ADS1015IDGSR)
- Integrated 4-channel MUX （vs ADS1114IDGSR)
設計ノート
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.
コンプライアンス情報
AEC-Q100 qualified automotive variant (ADS1115-Q1 family). RoHS/REACH per TI product page.
