AD7992BRMZ-1-R2 - 12-Bit 2-Ch SAR ADC, I2C, 10-MSOP | Analog Devices
Артикул: AD7992BRMZ-1-R2 ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 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 Обзор
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.
Аналоги без доработки для AD7992BRMZ-1-R2 — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с AD7992BRMZ-1-R2 (тот же форм-фактор и посадочное место) — отличается по Number of Input Channels, Operating Temperature Range, Package, Resolution, RoHS Status.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
AD7992BRMZ-0
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
AD7991BRMZ
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
AD7992BRMZ-1
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
AD7992BRMZ-1REEL7
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
AD7992BRMZ-1REEL
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
AD7992BRMZ-1-R2 Максимальные параметры и электрические характеристики
| Разрешение | 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 |
| Интерфейс | 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 |
| Диапазон рабочих температур | -40C to +125C |
| Корпус | 10-pin MSOP (RM-10) |
| Тип монтажа | Surface Mount |
| Conversion Control | CONVST pin, command mode, or automatic interval mode |
| Reel Quantity (R2 suffix) | 250 pieces |
| Статус RoHS | Compliant |
Конфигурация выводов AD7992BRMZ-1-R2
| Контакт 1 | VDD — Power supply input (2.7 V to 5.5 V) |
| Контакт 2 | GND — Ground reference |
| Контакт 3 | REF — External reference voltage input (1.2 V to VDD) |
| Контакт 4 | AIN1 — Analog input channel 1 |
| Контакт 5 | AIN2 — Analog input channel 2 |
| Контакт 6 | CONVST — Conversion start input (active low) |
| Контакт 7 | SCL — I2C serial clock input |
| Контакт 8 | SDA — I2C serial data I/O |
| Контакт 9 | AD0 — I2C address select bit 0 |
| Контакт 10 | NC — Not connected (per datasheet) |
Типичное применение
AD7992BRMZ-1-R2 подходит для 6 применениеs: 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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для AD7992BRMZ-1-R2 — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | 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 |
Ключевые отличия
- High-speed I2C up to 3.4 MHz (против AD7992BRMZ-0)
- 2-channel multiplexer in 10-MSOP (против AD7991BRMZ)
- Smaller reel size for low-volume builders (против AD7992BRMZ-1REEL)
Заметки по проектированию
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.
Информация о соответствии
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.
