AD7853LBRZ-REEL - 12-Bit 100kSPS SAR ADC | Analog Devices
料号： AD7853LBRZ-REEL ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $14.25 | $14.25 |
| 10 | $12.85 | $128.50 |
| 100 | $11.46 | $1,146.00 |
| 500 | $10.21 | $5,105.00 |
| 1,000 | $9.08 | $9,080.00 |
AD7853LBRZ-REEL 概述
An SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm implemented with a capacitive DAC and a comparator to digitize an analog input in N successive approximation steps. SAR converters are valued for their deterministic latency, single-shot accuracy, and low power consumption compared to pipeline or sigma-delta ADCs. As a precision data-acquisition building block, an SAR ADC sits between the analog signal-conditioning front end (amplifiers, filters, muxes) and the digital host controller in the broader mixed-signal IC hierarchy: sensor -> analog front-end -> ADC -> MCU/DSP/FPGA.
Key features include 12-bit resolution with no missing codes, an 8051/QSPI/MICROWIRE-compatible serial interface, self-calibration on power-up, and a typical power dissipation of only 12 mW at 5 V. The wide SOIC-24 footprint provides generous thermal headroom and easy hand-soldering or rework in prototyping. The single-supply, low-power architecture makes the part especially well suited to portable instrumentation, industrial process control, and battery-powered data-acquisition front ends.
Typical applications include portable instrumentation and battery-powered data loggers, industrial process-control loops (4-20 mA digitized at the sensor), patient-monitoring front ends, multi-channel multiplexed data-acquisition systems, and precision sensor read-out (load cells, strain gauges, thermocouple digitizers). Designers value the -L grade when the application requires sub-100 kSPS throughput and minimal quiescent drain.
When designing with this device, route the analog and digital grounds as a star from a common point, decouple VDD with a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin, and keep the SCLK and CONVST traces short to avoid aperture jitter. The self-calibration routine takes a fixed time after power-up - reserve 100 us in your firmware before issuing the first conversion command.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： AD7853LBRZ-REEL ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： AD7853LBRZ-REEL （相同外形与封装尺寸） ——差异在于 Conversion Time, Architecture, Data Interface, Operating Temperature, Packaging.
快速对比工具——选择替代料号进行并排对比：
AD7853LBRZ
✅ 直接替换📋 参考替代料（不在目录中）
AD7853LARZ-REEL
✅ 直接替换📋 参考替代料（不在目录中）
AD7853ARZ
✅ 直接替换📋 参考替代料（不在目录中）
AD7828KPZ-REEL
✅ 直接替换✓ 有现货
$7.95 / 个
查看数据手册 →AD7827BRZ-REEL7
✅ 直接替换✓ 有现货
$2.91 / 个
查看数据手册 →AD7853LBRZ-REEL 最大额定值与电气特性
| 分辨率 | 12 bits |
| Architecture | SAR (Successive Approximation) |
| Number of Channels | 1 |
| 采样率 | 100 kSPS (L grade) |
| Conversion Time | 18 us (typical) |
| 输入电压范围 | 0 V to VDD (single-ended, unipolar) |
| Supply Voltage (VDD) | 3 V to 5.5 V (single supply) |
| 电源电流 | 2.4 mA typ @ 5 V (100 kSPS, L grade) |
| Power Dissipation | 12 mW typ @ 5 V, 100 kSPS |
| Data Interface | Serial SPI / QSPI / MICROWIRE / 8051-compatible |
| Self-Calibration | System + self-calibration on power-up (autocal) |
| 工作温度 | -40 C to +85 C (industrial) |
| 封装 | 24-pin SOIC (Wide, 0.295 inch / 7.50 mm Width) |
| 安装类型 | Surface Mount |
| Lead-Free / RoHS | Yes (BRZ suffix) |
| Packaging | Tape & Reel (REEL suffix) |
AD7853LBRZ-REEL 引脚配置
| 引脚 1 | VDD — Analog + Digital supply (3 V to 5.5 V) |
| 引脚 2 | AGND — Analog ground |
| 引脚 3 | REF — Reference input/decoupling node (internal reference) |
| 引脚 4 | AIN — Analog input (single-ended, 0 V to VDD) |
| 引脚 5 | NC — Not connected (per datasheet) |
| 引脚 6 | NC — Not connected (per datasheet) |
| 引脚 7 | AGND — Analog ground |
| 引脚 8 | NC — Not connected (per datasheet) |
| 引脚 9 | NC — Not connected (per datasheet) |
| 引脚 10 | NC — Not connected (per datasheet) |
| 引脚 11 | NC — Not connected (per datasheet) |
| 引脚 12 | NC — Not connected (per datasheet) |
| 引脚 13 | NC — Not connected (per datasheet) |
| 引脚 14 | NC — Not connected (per datasheet) |
| 引脚 15 | NC — Not connected (per datasheet) |
| 引脚 16 | NC — Not connected (per datasheet) |
| 引脚 17 | DGND — Digital ground |
| 引脚 18 | DOUT — Serial data output |
| 引脚 19 | SCLK — Serial clock input |
| 引脚 20 | DIN — Serial data input (configuration word) |
| 引脚 21 | CONVST — Conversion start input |
| 引脚 22 | BUSY — Active-high conversion-in-progress output |
| 引脚 23 | CAL — Calibration control (per datasheet self-cal mode) |
| 引脚 24 | VDD — Supply (tie to pin 1 VDD) |
典型应用
AD7853LBRZ-REEL 适用于 6 应用s: Portable Instrumentation & Data Loggers, Industrial Process Control (4-20 mA Loop Digitization), Patient Monitoring & Medical Front Ends, Multi-Channel Multiplexed Data Acquisition Systems, Precision Sensor Read-Out (Load Cells & Strain Gauges), Battery-Powered Wireless Sensor Nodes.
Portable Instrumentation & Data Loggers
The AD7853LBRZ-REEL's single 3 V to 5.5 V supply, 12 mW typical power dissipation, and 100 kSPS throughput make it ideal for portable instrumentation and battery-powered data loggers. The L grade's lower speed translates directly into lower quiescent current, extending battery life in handheld multimeters and field data loggers. Placed between the sensor analog front-end (op-amp + mux) and the host MCU's SPI port, it delivers deterministic 18 us conversion latency without sigma-delta group delay, simplifying firmware timing.
推荐
Industrial Process Control (4-20 mA Loop Digitization)
The AD7853LBRZ-REEL excels in industrial process-control digitizers that break down the 4-20 mA current loop right at the sensor head. Its industrial -40 C to +85 C temperature range and self-calibration on power-up eliminate the need for periodic manual calibration. The 100 kSPS sampling easily oversamples slow process variables (temperature, pressure, flow), and the SOIC-24 wide-body footprint tolerates factory-floor thermal stress better than smaller MSOP/QFN parts. Consider pairing with a current-sense amplifier for direct loop digitization.
推荐
Patient Monitoring & Medical Front Ends
The AD7853LBRZ-REEL's deterministic SAR latency and SPI interface fit medical-grade patient monitoring front ends (ECG, pulse oximeter, body-impedance measurement). Unlike sigma-delta converters, the SAR architecture gives a clean 12-bit result per sample with no digital filter delay, critical for real-time cardiac waveform capture. The 12 mW dissipation keeps thermal rise low in wearable patient monitors, and the wide SOIC-24 package supports easy hand-soldering during prototyping and certification build cycles.
推荐
Multi-Channel Multiplexed Data Acquisition Systems
For multiplexed multi-channel DAQ systems, the AD7853LBRZ-REEL's per-sample deterministic latency (no sigma-delta group delay) means all channels share identical timing alignment. When paired with an external analog mux (e.g., ADG726), the system can sample 8 to 16 channels at 100 kSPS aggregate. The 24-pin SOIC wide-body gives the part strong resistance to vibration and thermal cycling in chassis-mounted industrial data acquisition cards, and the serial interface reduces board wiring to 4 signals.
推荐
Precision Sensor Read-Out (Load Cells & Strain Gauges)
The AD7853LBRZ-REEL's self-calibration routine corrects internal offset and gain errors on every power-up, eliminating the long-term drift concerns common in load-cell and strain-gauge bridges. At 100 kSPS it digitizes bridge outputs faster than the mechanical settling time of the transducer, effectively making throughput non-limiting. The 12-bit resolution suits low-frequency weighing scales and force-sensing industrial presses; for higher-precision scales, consider a 16-bit sigma-delta like the AD7799 instead. The SOIC-24 footprint provides thermal stability for factory-floor weighing systems.
推荐
Battery-Powered Wireless Sensor Nodes
The AD7853LBRZ-REEL's 12 mW dissipation at 5 V (and proportionally lower at 3.3 V) makes it an excellent ADC for battery-powered wireless sensor nodes that spend most of their time in sleep mode and wake periodically to digitize. The self-calibration completes on power-up, allowing the host MCU to power the ADC only during the brief measurement window, dramatically extending coin-cell battery life. The wide SOIC-24 package also tolerates the moderate reflow profiles used in industrial IoT sensor modules.
推荐
推荐产品汇总
工程参考数据： AD7853LBRZ-REEL ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | AD7853LBRZ | AD7853LARZ-REEL | AD7853ARZ | AD7828KPZ-REEL | AD7827BRZ-REEL7 | AD7827BRZ |
|---|---|---|---|---|---|---|---|
| Package | 24-pin SOIC (Wide) | 24-pin SOIC (Wide) - same | 24-pin SOIC (Wide) - same | 24-pin SOIC (Wide) - same | 24-pin SOIC (Wide) - same | 24-pin SOIC (Wide) - same | 24-pin SOIC (Wide) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sampling Rate | 100 kSPS (L grade) | 100 kSPS | 100 kSPS | 200 kSPS | ~500 kSPS aggregate | ~500 kSPS aggregate | ~500 kSPS aggregate |
| Number of Channels | 1 | 1 | 1 | 1 | 8 | 8 | 8 |
| Supply Voltage | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (industrial) | -40 C to +85 C | -40 C to +125 C (automotive) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Power Dissipation | 12 mW typ @ 5 V | 12 mW typ @ 5 V | 12 mW typ @ 5 V | ~18 mW typ @ 5 V (200 kSPS) | ~60 mW typ @ 5 V | ~60 mW typ @ 5 V | ~60 mW typ @ 5 V |
| Serial Interface | SPI / QSPI / MICROWIRE / 8051 | SPI / QSPI / MICROWIRE / 8051 | SPI / QSPI / MICROWIRE / 8051 | SPI / QSPI / MICROWIRE / 8051 | Parallel + serial | Parallel + serial | Parallel + serial |
关键差异点
- Low-power L grade with same SOIC-24 pinout as 200 kSPS standard grade （对比 AD7853ARZ)
- Automotive temperature grade variant available in same package （对比 AD7853LARZ-REEL)
- Single-channel vs multi-channel 12-bit SAR alternative in same package （对比 AD7828KPZ-REEL)
设计说明
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VDD pins (pins 1 and 24), and a 10 uF bulk capacitor nearby. Use a star-ground topology tying AGND (pins 2, 7) and DGND (pin 17) to a single point under the IC. Keep the analog input trace short and guarded by ground pours on both sides to minimize coupled digital noise. Reference decoupling on the REF pin (pin 3) is critical for specified linearity.
Route SCLK, CONVST, BUSY, DIN, and DOUT away from the analog input trace. Use a 4-layer PCB with a continuous ground plane; avoid routing digital signals under the IC. Place a small ferrite bead or 100 ohm resistor in series with the digital supply trace if switching noise is observed in the ADC output codes. Terminate the SCLK line close to the AD7853LBRZ-REEL's SCLK pin if the trace exceeds 50 mm.
Do not issue a new CONVST edge while BUSY is high - the AD7853L family will not acknowledge a second start. Reserve 100 us after VDD reaches 3 V for the internal self-calibration routine to complete before issuing the first conversion. Ensure the analog input remains within 0 V to VDD (unipolar mode); exceeding VDD by even 0.3 V can cause permanent damage. The reference pin (REF) requires a 0.1 uF ceramic capacitor as close as possible to the pin.
Estimated: at 5 V supply and 100 kSPS continuous sampling, the AD7853LBRZ-REEL draws about 2.4 mA (12 mW typ). For battery-powered designs, gate VDD with a low-leakage MOSFET or load switch and power the ADC only during the brief measurement window - the self-calibration completes in <100 us on power-up, enabling duty-cycled operation that drops average current below 100 uA.
合规信息
BRZ suffix denotes lead-free SOIC wide-body package; RoHS compliant per Analog Devices product page. Standard part is industrial grade; choose AD7853LARZ-REEL for automotive AEC-Q100 deployments.
