AD7477ARTZ-REEL - 10-Bit 1MSPS SAR ADC SOT-23-6 | Analog Devices
部品番号: AD7477ARTZ-REEL ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.92 | $4.92 |
| 10 | $4.31 | $43.10 |
| 100 | $3.55 | $355.00 |
| 500 | $2.91 | $1,455.00 |
| 1,000 | $2.45 | $2,450.00 |
AD7477ARTZ-REEL 概要
A SAR ADC is a successive-approximation-register converter that uses a binary-search algorithm and an internal capacitive DAC to convert an analog input into a digital codeword. Within the data-converter hierarchy, SAR ADCs sit between flash converters (faster, lower resolution, higher power) and sigma-delta ADCs (slower, higher resolution, excellent noise). They occupy the niche where moderate-to-high speed, low latency, and low power consumption are required without the latency penalty of oversampling converters.
Key features of the AD7477ARTZ-REEL include 70 dB SNR at 100 kHz input, wide input bandwidth, low power at 1 MSPS with both 3 V and 5 V supplies, and a small SOT-23-6 footprint that enables dense PCB layouts. The wide supply range lets a single device operate across 3.3 V and 5 V system rails, simplifying multi-rail designs and reducing inventory variants.
The internal architecture combines an input sampling network, a precision comparator, a successive-approximation register with a 10-bit DAC, and a serial output engine. The 70 dB SNR translates to roughly 11.3 effective bits at full speed, sufficient for industrial monitoring, motor-control feedback loops, and instrumentation front-ends where 10-bit absolute accuracy is required.
Typical applications include battery-management systems, portable instrumentation, data acquisition front-ends, optical-module monitoring, and general-purpose embedded analog signal conditioning. The small package makes it well suited to space-constrained designs such as handheld test equipment and IoT sensor nodes.
When designing with the AD7477ARTZ-REEL, observe proper analog-input driving and decoupling: use a low-impedance buffer or RC network at AIN, and place 100 nF bypass capacitors as close to VDD and GND as possible to preserve SNR at full 1 MSPS throughput.
This page consolidates manufacturer specifications, distributor pricing as of 2026-10-12, drop-in alternatives, and practical design notes drawn from the Analog Devices datasheet family to support fast, accurate component selection.
ドロップイン代替品: AD7477ARTZ-REEL — 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: AD7477ARTZ-REEL （同一形状・フットプリント） — 相違点: Package, Resolution, Number of Channels, Architecture, Data Interface.
クイック比較ツール — 並列比較する代替部品を選択:
AD7477ARTZ-REEL7
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD7476ARTZ-REEL
✅ ドロップイン✓ 在庫あり
$3.32 / 個
データシートを見る →AD7478ARTZ-REEL
✅ ドロップイン✓ 在庫あり
$3.15 / 個
データシートを見る →AD7476BRTZ-REEL
✅ ドロップイン✓ 在庫あり
$2.85 / 個
データシートを見る →AD7477ART-REEL
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD7477ARTZ-REEL 最大定格＆電気的特性
| 分解能 | 10 bits |
| Number of Input Channels | 1 |
| Converter Type | SAR (Successive Approximation) |
| サンプリングレート | 1 MSPS |
| Supply Voltage (VDD) | 2.35 V to 5.25 V |
| Signal-to-Noise Ratio (SNR) | 70 dB at 100 kHz input |
| Input Bandwidth | Wide (per datasheet typical curve) |
| Data Interface | SPI, QSPI, MICROWIRE, DSP serial |
| パッケージ | SOT-23-6 |
| 動作温度 | -40 C to +85 C |
| 実装タイプ | Surface Mount |
| MSLレベル | 1 (per JEDEC J-STD-020) |
| Lead-Free / RoHS | Lead-free, RoHS compliant |
AD7477ARTZ-REEL ピン構成
| ピン 1 | AIN — Analog input (single-ended, 0 V to VDD) |
| ピン 2 | GND — Ground reference |
| ピン 3 | CS — Chip-select (active low) for serial interface |
| ピン 4 | SCLK — Serial clock input |
| ピン 5 | SDATA — Serial data output |
| ピン 6 | VDD — Power supply (2.35 V to 5.25 V) |
主な用途
AD7477ARTZ-REEL の用途: 7 件s: Battery Management System (BMS) Cell Monitoring, Portable Instrumentation and Data Acquisition, Optical Module Monitoring (SFP/QSFP), Motor Control Feedback Loops, General-Purpose Embedded Analog Input, IoT Sensor Node Signal Conditioning, Industrial Process Control Front-End.
Battery Management System (BMS) Cell Monitoring
The AD7477ARTZ-REEL fits battery-management cell-monitoring applications because it delivers 10-bit resolution at 1 MSPS from a 2.35 V to 5.25 V single supply. Cell voltages from a divider string are typically 0 V to 4.5 V, well within the VDD range, and the 1 MSPS throughput supports multi-channel sequential monitoring via an external mux. The SOT-23-6 footprint is small enough to place one ADC per cell-monitoring IC, reducing routing complexity in 12S/16S packs. The 70 dB SNR at 100 kHz input yields about 11.3 ENOB at full speed, more than adequate for cell-balancing thresholds. Designers should drive AIN with a low-impedance buffer to preserve SNR under dynamic load.
おすすめ
Portable Instrumentation and Data Acquisition
For handheld test equipment and portable data loggers, the AD7477ARTZ-REEL combines 10-bit precision, 1 MSPS throughput, and a 6-lead SOT-23 package that fits inside cramped enclosures. Its 2.35 V to 5.25 V supply range allows direct connection to a single-cell Li-ion or USB-derived rail, simplifying power-tree design. The SPI-compatible serial interface connects to almost any microcontroller or DSP with no glue logic. Compared with a sigma-delta ADC, the AD7477 provides single-cycle latency, which simplifies time-correlated triggering in transient-capture applications. For higher resolution in the same footprint the AD7476ARTZ-REEL is a pin-compatible upgrade.
おすすめ
Optical Module Monitoring (SFP/QSFP)
In SFP, QSFP, and other pluggable optical transceivers the AD7477ARTZ-REEL monitors the receive optical power via a photodiode amplifier. The 1 MSPS sampling rate supports both DC bias-point monitoring and AC dithering for AGC loops, while the 10-bit resolution is sufficient to resolve typical laser-bias modulation amplitudes. The SOT-23-6 footprint fits inside the tight module cages used by QSFP-DD and OSFP designs, and the 2.35 V to 5.25 V supply aligns with the 3.3 V module rail. The SPI interface shares bus pins with the microcontroller's housekeeping microcontroller. A 100 nF bypass capacitor placed within 3 mm of VDD is recommended to preserve SNR.
おすすめ
Motor Control Feedback Loops
The AD7477ARTZ-REEL provides the analog-to-digital conversion stage in low-cost BLDC and stepper motor current-sense loops. Its 1 MSPS sampling rate comfortably exceeds the typical 20 kHz PWM frequency, leaving headroom for synchronous sampling and digital filtering. The 70 dB SNR ensures current-sense accuracy better than 1 percent at full scale when paired with a quality current-sense amplifier. The SOT-23-6 package keeps the ADC close to the sense resistor, minimizing ground-loop pickup. Designers should use a differential drive into AIN with a small RC anti-aliasing filter to maximize bandwidth before the next switching edge.
おすすめ
General-Purpose Embedded Analog Input
For microcontroller-based designs that need a fast, low-power external ADC, the AD7477ARTZ-REEL adds 10-bit 1 MSPS conversion alongside almost any SPI-capable MCU. It handles switch-bounce sampling, fast transducer readout, and battery-voltage telemetry without burdening the main ADC inside the MCU. The 2.35 V to 5.25 V supply supports both 3.3 V and 5 V MCUs, and the SOT-23-6 footprint places it within 10 mm of the analog source. The part is also a useful A/D reference when calibrating a sigma-delta ADC by providing a known-speed stimulus.
おすすめ
IoT Sensor Node Signal Conditioning
In battery-powered IoT sensor nodes the AD7477ARTZ-REEL provides the high-speed capture path for transient sensor events such as accelerometers, microphones, or shock sensors. The 1 MSPS throughput captures sub-millisecond bursts while the MCU sleeps, and the 70 dB SNR yields clean waveforms for FFT analysis at the edge. The wide 2.35 V to 5.25 V supply accommodates Li-ion, LiFePO4, and 5 V USB sources; the SOT-23-6 package fits inside a coin-cell sensor housing. Duty-cycled sampling at sub-MHz rates further reduces current draw in sleep windows.
おすすめ
Industrial Process Control Front-End
Industrial process-control front-ends use the AD7477ARTZ-REEL to digitize 4-20 mA loop signals after a sense resistor, or to read thermocouple/bridge outputs after instrumentation amplification. Its 1 MSPS throughput supports loop rates above 100 kHz, and the 10-bit resolution is sufficient for many on/off control loops where the analog value is used as a trip-point input. The SOT-23-6 package and 2.35 V to 5.25 V supply integrate easily into DIN-rail modules with isolated 5 V rails. Proper isolation barrier placement and a buffered input reduce common-mode noise on long industrial cables.
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: AD7477ARTZ-REEL — 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 | AD7477ARTZ-REEL7 | AD7476ARTZ-REEL | AD7478ARTZ-REEL | AD7476BRTZ-REEL | AD7477ART-REEL |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | SOT-23-6 | SOT-23-6 - same | SOT-23-6 - same | SOT-23-6 - same | SOT-23-6 - same | SOT-23-6 - same |
| Resolution | 10 bits | 10 bits | 12 bits | 8 bits | 12 bits | 10 bits |
| Sampling Rate | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS |
| Supply Voltage | 2.35 V to 5.25 V | 2.35 V to 5.25 V | 2.35 V to 5.25 V | 2.35 V to 5.25 V | 2.35 V to 5.25 V | 2.35 V to 5.25 V |
| Data Interface | SPI/QSPI/MICROWIRE/DSP | SPI/QSPI/MICROWIRE/DSP | SPI/QSPI/MICROWIRE/DSP | SPI/QSPI/MICROWIRE/DSP | SPI/QSPI/MICROWIRE/DSP | SPI/QSPI/MICROWIRE/DSP |
| SNR | 70 dB at 100 kHz | 70 dB at 100 kHz | 70 dB at 100 kHz | 70 dB at 100 kHz | 70 dB at 100 kHz | 70 dB at 100 kHz |
| Reel Code | -REEL (standard 7") | -REEL7 | -REEL | -REEL | -REEL | -REEL (legacy) |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
主な差別化要因
- Smallest-footprint 1 MSPS SAR ADC with active lifecycle （vs AD7265BCPZ-REEL)
- Wide 2.35 V to 5.25 V single-supply range （vs AD7476BRTZ-REEL)
- Direct drop-in path to 12-bit resolution （vs AD7476ARTZ-REEL)
設計ノート
Place a 100 nF ceramic bypass capacitor within 3 mm of the VDD pin (pin 6) and route GND (pin 2) directly to the analog ground plane. The AIN trace should be short, guarded by ground on both sides, and routed away from the serial-interface lines (CS, SCLK, SDATA) to minimize digital-to-analog crosstalk. A small RC anti-aliasing filter (typically 100 ohm + 10 pF) at AIN reduces wideband noise and protects against out-of-band transient aliasing at 1 MSPS.
Drive AIN with a low-impedance source - typically a rail-to-rail op-amp buffer with < 100 ohm output impedance - to preserve the 70 dB SNR at 1 MSPS. The input sampling network draws brief current spikes during acquisition; insufficient source impedance will cause gain error and degraded THD. For multi-MHz input signals add a dedicated ADC driver such as the AD8031 or ADA4896 between the source and AIN to maintain linearity.
Do not exceed the 5.25 V absolute maximum on VDD; the part does not include internal over-voltage protection. Ensure CS is held high between conversions to keep the serial interface idle and avoid false SDATA transitions. When using SPI mode, configure the host MCU to read on the appropriate SCLK edge as specified in the datasheet timing diagram - incorrect edge selection yields corrupt codes. Finally, decouple the digital supply (if separate) to prevent digital switching noise from coupling into VDD via the bond wire.
The SOT-23-6 package dissipates approximately 6 mW to 12 mW at 1 MSPS, well within the thermal envelope of the package. In enclosed designs above 70 C ambient, verify theta_JA from the datasheet and ensure copper area under pin 2 (GND) is at least 25 mm squared to stay within the -40 C to +85 C operating range. No additional heatsinking is required for typical use.
コンプライアンス情報
Lead-free / RoHS compliant per Analog Devices product page and reel suffix 'Z' in the part number; AEC-Q100 not applicable for this industrial-grade commercial-temperature-range part.