AD7992BRMZ-1-R2 - 12-Bit 2-Ch SAR ADC, I2C, 10-MSOP | Analog Devices
部品番号: AD7992BRMZ-1-R2 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.68 | $46.80 |
| 100 | $4.15 | $415.00 |
| 500 | $3.74 | $1,870.00 |
| 1,000 | $3.35 | $3,350.00 |
AD7992BRMZ-1-R2 概要
An ADC (analog-to-digital converter) is a data-acquisition IC that samples continuous analog signals and translates them into discrete digital codes for downstream processors, microcontrollers, or FPGAs. SAR ADCs use a successive-approximation register and an internal DAC to perform one bit per clock cycle, achieving deterministic latency that is ideal for multiplexed multi-channel systems. The AD7992 belongs to the broader data-converter hierarchy: ADC -> data converter -> signal chain IC -> mixed-signal semiconductor, sitting between the analog sensor front end and the digital host.
Key features include a 2-channel input multiplexer with track-and-hold, an external reference input from 1.2 V to VDD for maximum dynamic range, automatic or command-driven conversion modes controlled via the CONVST pin or the I2C bus, and a wide operating temperature range of -40C to +125C. The device consumes only a few milliwatts in operation and provides excellent DC accuracy for its class.
Typical applications include system monitoring and battery-cell monitoring in portable equipment, transducer/sensor signal acquisition, process-control loop read-back, and digital-system analog housekeeping (supply rails, temperature, current). The small 10-MSOP footprint, low power, and I2C connectivity make it a strong fit for space-constrained, multi-rail designs.
When designing with the AD7992BRMZ-1-R2, choose the external reference carefully - the input range scales with VREF, so a 5 V reference allows true 0-5 V single-ended or pseudo-differential sensing without external dividers. Decouple VDD with a 0.1 uF ceramic placed within 5 mm of the pin and keep analog/digital grounds joined at a single star point. Pull-up resistors on SDA/SCL must be sized for the chosen I2C speed (4.7 kohm at 400 kHz, 1 kohm at 3.4 MHz).
This page consolidates distributor pricing from DigiKey, Mouser, and Octopart, drop-in alternatives that share the 10-MSOP footprint, and practical design notes not included in the manufacturer datasheet.
ドロップイン代替品: AD7992BRMZ-1-R2 — 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: AD7992BRMZ-1-R2 （同一形状・フットプリント） — 相違点: Number of Input Channels, Operating Temperature Range, Package, Resolution, RoHS Status.
クイック比較ツール — 並列比較する代替部品を選択:
AD7992BRMZ-0
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD7991BRMZ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD7992BRMZ-1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD7992BRMZ-1REEL7
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD7992BRMZ-1REEL
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD7992BRMZ-1-R2 最大定格＆電気的特性
| 分解能 | 12 bits |
| Number of Input Channels | 2 (1 active at a time) |
| ADC Architecture | SAR (Successive Approximation) |
| Conversion Time | 2 us per channel (typical) |
| Input Type | Single-ended, multiplexed |
| インターフェース | I2C (Standard / Fast / High-Speed up to 3.4 MHz) |
| Number of I2C Addresses | Up to 2 (version dependent) |
| Supply Voltage (VDD) | 2.7 V to 5.5 V |
| External Reference Range | 1.2 V to VDD |
| 動作温度範囲 | -40C to +125C |
| パッケージ | 10-pin MSOP (RM-10) |
| 実装タイプ | Surface Mount |
| Conversion Control | CONVST pin, command mode, or automatic interval mode |
| Reel Quantity (R2 suffix) | 250 pieces |
| RoHS ステータス | Compliant |
AD7992BRMZ-1-R2 ピン構成
| ピン 1 | VDD — Power supply input (2.7 V to 5.5 V) |
| ピン 2 | GND — Ground reference |
| ピン 3 | REF — External reference voltage input (1.2 V to VDD) |
| ピン 4 | AIN1 — Analog input channel 1 |
| ピン 5 | AIN2 — Analog input channel 2 |
| ピン 6 | CONVST — Conversion start input (active low) |
| ピン 7 | SCL — I2C serial clock input |
| ピン 8 | SDA — I2C serial data I/O |
| ピン 9 | AD0 — I2C address select bit 0 |
| ピン 10 | NC — Not connected (per datasheet) |
主な用途
AD7992BRMZ-1-R2 の用途: 6 件s: Portable System Monitoring, Industrial Process Control Loop Read-Back, Battery Cell Voltage Monitoring, Sensor Signal Acquisition (RTD / Thermocouple), Digital System Housekeeping, Test & Measurement Front-End.
Portable System Monitoring
The AD7992BRMZ-1-R2 suits portable system monitoring because its 2.7-5.5 V supply range aligns with single-cell Li-ion and USB rails, while its 12-bit SAR core provides deterministic 2 us conversion latency. The -1 variant's 3.4 MHz I2C mode keeps bus time short on densely-multiplexed designs. Two analog inputs let a single IC monitor battery voltage on one channel and die temperature (via a diode-connected transistor) on the other, cutting the BOM versus a discrete comparator plus ADC pair. The 10-MSOP package fits wearables and handheld instruments.
おすすめ
Industrial Process Control Loop Read-Back
The AD7992BRMZ-1-R2's -40C to +125C operating range and 12-bit resolution make it suitable for industrial control loops reading 0-5 V or 0-10 V transducers. An external 5 V reference gives 1.22 mV LSB, fine enough for pressure or flow transmitters without PGA front-end amplification. The I2C interface allows up to 2 addresses per package, enabling multiple AD7992s on a single bus for panel-meter density. Watchdog-free deterministic latency simplifies PLC software design.
おすすめ
Battery Cell Voltage Monitoring
Use the AD7992BRMZ-1-R2 to monitor two series cells or a cell plus pack-current sense resistor. Its external reference scales to whatever VREF bias the cell stack uses, and the SAR architecture produces a clean snapshot without input-charge sharing glitches between channels. The low 2.7 V minimum supply lets it run from the lowest cell in the stack or from a dedicated auxiliary rail. Internal multiplexing reduces wiring versus two single-channel ADCs.
おすすめ
Sensor Signal Acquisition (RTD / Thermocouple)
Bridge, RTD, or thermocouple outputs require high-resolution ADC read-back; the AD7992BRMZ-1-R2's 12 bits and small input-referred noise enable ratiometric measurement against an external reference for accurate cold-junction compensation. Two channels let one ADC read the sensor and a second channel read the reference-junction temperature sensor. SAR architecture provides no-pipeline-delay conversions, ideal for safety loops. Add an op-amp front-end for gain.
おすすめ
Digital System Housekeeping
Board-level housekeeping - reading supply voltages, hot-spot temperature, and chassis fan tach - is a classic use case for the AD7992BRMZ-1-R2. The I2C bus shares with other system components and the two channels monitor a single node pair (for example 3.3 V rail and 1.2 V core). The MSOP-10 footprint sits comfortably next to a multi-rail DC-DC converter. Post-mortem data captured at fault time helps root-cause analysis.
おすすめ
Test & Measurement Front-End
Bench instruments and data loggers that need compact, multi-channel digitizing benefit from the AD7992BRMZ-1-R2's 2 us conversion time and small 10-MSOP footprint. The 12-bit SAR core plus external reference delivers calibrated measurements traceable to the reference standard, while I2C connectivity pairs naturally with a Raspberry Pi or microcontroller host. Designers can scale to 4, 8, or 16 channels by adding AD7994 or AD7997 parts on the same bus.
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: AD7992BRMZ-1-R2 — 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 | AD7992BRMZ-0 | AD7991BRMZ | AD7992BRMZ-1REEL7 | AD7992BRMZ-1REEL |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 10-MSOP (RM-10) | 10-MSOP (RM-10) | 10-MSOP (RM-10) | 10-MSOP (RM-10) | 10-MSOP (RM-10) |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Input Channels | 2 | 2 | 1 | 2 | 2 |
| Maximum I2C Speed | 3.4 MHz (high-speed) | 400 kHz (fast mode) | 3.4 MHz (high-speed) | 3.4 MHz (high-speed) | 3.4 MHz (high-speed) |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Conversion Time | 2 us | 2 us | 2 us | 2 us | 2 us |
| Reel Quantity | 250 (R2 suffix) | 50 (Tube) or 1k (REEL) | 50 (Tube) or 1k (REEL) | 500 (REEL7) | 1000 (REEL) |
| Release Form | Tape & Reel, 250 pcs (R2) | Tray / Reel | Tray / Reel | Tape & Reel, 500 pcs | Tape & Reel, 1000 pcs |
主な差別化要因
- High-speed I2C up to 3.4 MHz （vs AD7992BRMZ-0)
- 2-channel multiplexer in 10-MSOP （vs AD7991BRMZ)
- Smaller reel size for low-volume builders （vs AD7992BRMZ-1REEL)
設計ノート
Estimated: at VDD = 5 V and maximum I2C bus activity, the AD7992 draws a few milliwatts; budget 50 mW worst-case for power-rail sizing. Place a 0.1 uF X7R ceramic within 5 mm of the VDD pin and add a 10 uF tantalum or polymer bulk capacitor at the regulator output to absorb I2C burst transients.
Keep analog and digital grounds joined at a single star point under the GND pin to avoid digital return currents corrupting the analog conversion. Route the analog inputs (AIN1/AIN2) and REF away from switching nodes and from the SDA/SCL traces to minimize digital-coupling noise. Place the external reference decoupling cap (typically 1 uF) directly at the REF pin.
Do not operate without the external reference: the AD7992BRMZ-1-R2 has no internal VREF, so leaving REF floating produces indeterminate output codes. Size I2C pull-ups for the chosen bus speed (4.7 kohm typical at 400 kHz; 1 kohm required for reliable high-speed 3.4 MHz operation); undersized pull-ups cause timing violations and bus errors.
コンプライアンス情報
RoHS and lead-free compliance per Analog Devices product page. AEC-Q100 qualification status not stated in the verified web data; automotive designers should confirm directly with the factory. Halogen-free status marked unknown as it was not present in the verified sources.
