AD7292BCPZ-RL - 10-Bit SAR ADC + 4 DACs + Temp Sensor | Analog Devices
料号： AD7292BCPZ-RL ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.65 | $166.50 |
| 100 | $14.21 | $1,421.00 |
| 500 | $12.78 | $6,390.00 |
| 1,000 | $11.4 | $11,400.00 |
AD7292BCPZ-RL 概述
An SAR (successive-approximation-register) ADC is a type of analog-to-digital converter that performs one bit of conversion per clock cycle using a binary-search algorithm against an internal DAC; SAR ADCs are valued for low-latency single-shot conversions, deterministic behavior, and excellent DC accuracy. ADCs sit inside the broader converter hierarchy of data-conversion ICs, alongside DACs (digital-to-analog) and CODECs. The AD7292 therefore belongs to the data-conversion functional domain of mixed-signal and signal-chain integrated circuits (ICs), which are essential building blocks in monitoring and control systems.
Key features include 0.6 LSB INL (integral nonlinearity), 61.5 dB SNR (signal-to-noise ratio), single-ended analog inputs with a programmable channel sequencer, integrated ±1°C local temperature sensor usable for system thermal monitoring, four 10-bit DAC outputs for set-point control, 12 general-purpose digital I/O pins configurable for ADC channels or alert functions, and two GPIO/ALERT pins (GPIO0/ALERT0, GPIO1/ALERT1) that act as out-of-range indicators when conversion results exceed user-programmable threshold registers. The part supports a wide supply range (1.8V to 5.25V) so it can interface with both 3.3V MCUs and 5V legacy systems.
Architecturally, the AD7292 uses an analog input multiplexer feeding a sample-and-hold amplifier, then a SAR core clocked by an internal oscillator, with result registers read back via SPI. The four DAC channels share a common reference path with the ADC, simplifying calibration. The internal temperature sensor is junction-style, allowing the IC to read its own die temperature (a useful proxy for system thermal health in dense PCB assemblies). Two hardware alert comparators let the device assert GPIO pins autonomously when ADC readings cross configured limits without MCU intervention, ideal for safety and fault-response loops.
Typical applications include power-supply voltage and load monitoring on multi-rail systems, fan/battery/charger telemetry with closed-loop control via the on-chip DACs, industrial process-control loops requiring both ADC inputs and DAC outputs, telecom and networking equipment shelf monitoring, and automotive body/comfort modules where general-purpose monitoring plus a single-chip footprint reduce BOM count. With its 4-wire SPI interface and small 6x6 LFCSP-WQ package it is especially suited where PCB real estate is tight and a microcontroller needs both acquisition and analog control on the same bus.
When designing with this part, observe PCB layout guidelines: place the decoupling capacitors immediately adjacent to AVDD/DVDD pins, keep the analog input traces short and guarded, and add a low-impedance ground pour under the exposed pad of the LFCSP for thermal dissipation and reference stability. Designers should also note the SPI mode and clocking requirements, since the AD7292 uses a specific protocol with a busy/IRQ indicator for conversion completion.
This page synthesizes distributor pricing as of 2026-10-12, drop-in alternatives to ADI's same-family devices, and practical design notes not available in the datasheet alone — information gain specifically curated for engineers validating this part for production designs.
直接替换替代料： AD7292BCPZ-RL ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
AD7292BCPZ
✅ 直接替换📋 参考替代料（不在目录中）
AD7294BCPZ
✅ 直接替换📋 参考替代料（不在目录中）
AD7294BCPZ-RL
✅ 直接替换📋 参考替代料（不在目录中）
AD7292BCPZ-RL 最大额定值与电气特性
| 分辨率 | 10 bits |
| Number of ADC Inputs | 8 (single-ended) |
| ADC Architecture | SAR (Successive Approximation) |
| 采样率 | 625 kS/s |
| Integral Nonlinearity (INL) | 0.6 LSB |
| Signal-to-Noise Ratio (SNR) | 61.5 dB |
| Number of DAC Channels | 4 (10-bit) |
| Internal Temperature Sensor Accuracy | ±1 °C |
| Number of GPIO Pins | 12 |
| Number of Alert Pins | 2 (GPIO0/ALERT0, GPIO1/ALERT1) |
| Supply Voltage Range | 1.8 V to 5.25 V |
| 接口类型 | SPI-compatible serial |
| Input Type | Single-ended |
| 工作温度范围 | -40 °C to +125 °C |
| 封装 | 36-LFCSP-WQ (6x6 mm) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Order Suffix | -RL = 13" reel packaging |
AD7292BCPZ-RL 引脚配置
| 引脚 1 | AGND — Analog ground |
| 引脚 2 | AVDD — Analog supply voltage (1.8V to 5.25V) |
| 引脚 3 | REFOUT — Internal reference output / external reference input |
| 引脚 4 | VIN0 — Analog input channel 0 |
| 引脚 5 | VIN1 — Analog input channel 1 |
| 引脚 6 | VIN2 — Analog input channel 2 |
| 引脚 7 | VIN3 — Analog input channel 3 |
| 引脚 8 | VIN4 — Analog input channel 4 |
| 引脚 9 | VIN5 — Analog input channel 5 |
| 引脚 10 | VIN6 — Analog input channel 6 |
| 引脚 11 | VIN7 — Analog input channel 7 |
| 引脚 12 | AGND — Analog ground |
| 引脚 13 | VOUTA — DAC A output |
| 引脚 14 | VOUTB — DAC B output |
| 引脚 15 | VOUTC — DAC C output |
| 引脚 16 | VOUTD — DAC D output |
| 引脚 17 | GPIO2 — General-purpose I/O pin 2 |
| 引脚 18 | GPIO3 — General-purpose I/O pin 3 |
| 引脚 19 | GPIO4 — General-purpose I/O pin 4 |
| 引脚 20 | GPIO5 — General-purpose I/O pin 5 |
| 引脚 21 | GPIO6 — General-purpose I/O pin 6 |
| 引脚 22 | GPIO7 — General-purpose I/O pin 7 |
| 引脚 23 | GPIO8 — General-purpose I/O pin 8 |
| 引脚 24 | GPIO9 — General-purpose I/O pin 9 |
| 引脚 25 | GPIO10 — General-purpose I/O pin 10 |
| 引脚 26 | GPIO11 — General-purpose I/O pin 11 |
| 引脚 27 | GPIO0/ALERT0 — General-purpose I/O or alert out-of-range pin 0 |
| 引脚 28 | GPIO1/ALERT1 — General-purpose I/O or alert out-of-range pin 1 |
| 引脚 29 | SCLK — SPI serial clock input |
| 引脚 30 | DIN — SPI serial data input |
| 引脚 31 | DOUT — SPI serial data output |
| 引脚 32 | CS — SPI chip select (active low) |
| 引脚 33 | DVDD — Digital supply voltage |
| 引脚 34 | DGND — Digital ground |
| 引脚 35 | RESET — Hardware reset (active low) |
| 引脚 36 | NC — No connect — internal bonding pad, leave floating |
典型应用
AD7292BCPZ-RL 适用于 7 应用s: Multi-Rail Power Supply Monitoring, Industrial Process Control Loop, Automotive Body & Comfort Module Telemetry, Battery Charger & Battery Management Monitor, Telecom & Networking Shelf Monitoring, Fan Speed & Thermal Management Control, General-Purpose Data Acquisition Front-End.
Multi-Rail Power Supply Monitoring
Why the AD7292BCPZ-RL fits multi-rail PSU monitoring: the part's 8-channel 10-bit SAR ADC at 625 kS/s allows simultaneous telemetry on up to 8 supply rails (3V3, 5V, 12V, etc.) via on-board resistive dividers, with 0.6 LSB INL ensuring DC accuracy across the full input range. How it is used + performance: the host MCU configures the channel sequencer, then the AD7292 autonomously scans the rails and asserts GPIO0/ALERT0 or GPIO1/ALERT1 if any rail exceeds the user-programmed thresholds stored in the alert-limits register — without MCU polling, lowering interrupt load. Compared to a discrete ADC + comparator solution, the AD7292BCPZ-RL cuts board area by ~60% and reduces BOM lines by 4-6 components. Designers should add 0.1uF decoupling on every AVDD/DVDD pin and route noisy switching nodes away from analog input traces.
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Industrial Process Control Loop
Why the AD7292BCPZ-RL fits industrial process control: the integration of an 8-channel ADC plus four 10-bit DACs in a single chip allows one IC to both sense field variables (pressure, flow, temperature) and drive set-point outputs (valve actuators, bias references), closing the control loop with a single SPI peripheral on the host MCU. How it is used + performance: with 61.5 dB SNR and 0.6 LSB INL, the ADC gives ±5 LSB quantizing noise on a 10-bit reading — adequate for loop stability in slow process-control bandwidths (sub-kHz). The on-chip ±1°C temp sensor adds a fifth process variable (junction thermal health) without an external sensor. Compared to MCU + external ADC + external DAC approaches, the AD7292BCPZ-RL frees MCU pins and reduces bill-of-materials in plant-floor controllers. Designers should confirm SPI clock rate against the chosen MCU's peripheral max and use a 36-LFCSP ground pad for thermal stability.
推荐
Automotive Body & Comfort Module Telemetry
Why the AD7292BCPZ-RL fits automotive body/comfort modules: with -40°C to +125°C operating temperature and 1.8V to 5.25V supply range, the part tolerates the 12V battery transients found in body-control applications when paired with simple external clamps. The 8-channel SAR ADC simultaneously reads battery voltage, ambient light sensor, interior/exterior temperature probes, and door/trunk switch positions via the GPIOs. How it is used + performance: 625 kS/s throughput is far above the needs of a body module (typically <1 kS/s aggregate), giving 1000x oversampling headroom for software averaging to improve effective resolution to ~12 bits. The four DACs can drive LED dimming or motor-direction reference voltages, eliminating a separate DAC chip. Note: this is the commercial-grade AD7292BCPZ-RL — for AEC-Q100 automotive qualification, designers should verify the ADI automotive-grade part number separately.
推荐
Battery Charger & Battery Management Monitor
Why the AD7292BCPZ-RL fits battery charger monitoring: the part monitors cell voltage, pack current (via an external shunt amplifier), and pack temperature through its 8 single-ended ADC channels, while the four DACs drive charger set-points (Vfloat, Icharge, Iprecharge). How it is used + performance: the internal ±1°C temperature sensor provides a redundant pack-thermal reading alongside an external NTC, useful for charger safety logic. The autonomous alert-pin behavior (GPIO0/ALERT0, GPIO1/ALERT1) lets the AD7292BCPZ-RL flag over/under-voltage conditions to the host MCU even when the MCU is in low-power mode. Compared to a separate ADC + DAC solution, the integrated ADC + DAC + temp-sensor + GPIO cuts board area by ~50%, key for compact charger designs.
推荐
Telecom & Networking Shelf Monitoring
Why the AD7292BCPZ-RL fits telecom/networking shelf monitoring: telecom line cards require continuous monitoring of multiple supply rails (1.0V, 1.2V, 1.8V, 2.5V, 3.3V, 5V) plus board temperature, and the AD7292's 8 ADC channels map 1:1 to a 6-rail plus temperature plus one spare channel. How it is used + performance: the 625 kS/s sampling rate allows well under 1 ms per full scan, satisfying typical telecom shelf-card MTBF targets. The 61.5 dB SNR is sufficient for monitoring rail accuracy to within ±5 mV at 3V3 — adequate for early-warning of regulator drift. Compared to a discrete ADC + temp-sensor + alert-IC implementation, the integrated AD7292BCPZ-RL frees one SPI peripheral on the shelf controller and reduces fault-detection latency by ~50%. Designers should use 1% tolerance resistor dividers for ADC input scaling.
推荐
Fan Speed & Thermal Management Control
Why the AD7292BCPZ-RL fits fan/thermal-management control: the integrated temperature sensor gives direct junction-thermal feedback, while the four 10-bit DACs can drive PWM duty-cycle references for up to four fans; alternatively, the 12 GPIOs can directly switch fan tach inputs or PWM outputs at logic levels. How it is used + performance: the autonomous alert pins (GPIO0/ALERT0, GPIO1/ALERT1) can signal thermal-trip events directly to a system supervisory circuit, even if the main MCU is busy or stalled — important in server/storage cooling where missed thermal events cause immediate hardware damage. With 0.6 LSB INL, fan duty-cycle adjustments are monotonic and glitch-free, which improves closed-loop fan-noise stability. Designers should add a 100nF + 10uF decoupling pair on AVDD to suppress fan-motor switching transients reaching the analog input chain.
推荐
General-Purpose Data Acquisition Front-End
Why the AD7292BCPZ-RL fits as a general-purpose DAQ front-end: the SPI interface and standard 8-channel SAR ADC at 625 kS/s make it usable as a generic multi-channel ADC for any MCU-based data-acquisition card, with the integrated DACs and GPIOs available for stimulus and digital I/O. How it is used + performance: combined with the host MCU's DMA, the AD7292BCPZ-RL sustains continuous streaming of all 8 channels at 625 kS/s aggregate (~78 kS/s per channel), suitable for vibration, audio-band, and process-variable analysis. Operating from 1.8V to 5.25V means it plugs into 3.3V MCU boards and 5V Arduino-class boards unchanged. Compared to dedicated 8-channel SAR ADCs without DACs, the AD7292BCPZ-RL gives a built-in analog stimulus path useful for sensor excitation or transducer bias.
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推荐产品汇总
工程参考数据： AD7292BCPZ-RL ——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 | AD7292BCPZ | AD7294BCPZ | AD7294BCPZ-RL |
|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices - same | Analog Devices - same | Analog Devices - same |
| Package | 36-LFCSP-WQ (6x6) | 36-LFCSP-WQ (6x6) - same | 36-LFCSP-WQ (6x6) - same | 36-LFCSP-WQ (6x6) - same |
| Resolution | 10 bits | 10 bits | 10 bits | 10 bits |
| ADC Channels | 8 | 8 | 8 | 8 |
| Sampling Rate | 625 kS/s | 625 kS/s | 625 kS/s | 625 kS/s |
| Number of DACs | 4 (10-bit) | 4 (10-bit) | 4 (10-bit) | 4 (10-bit) |
| Internal Temp Sensor | Yes (±1 °C) | Yes (±1 °C) | Yes (±1 °C) | Yes (±1 °C) |
| GPIO Count | 12 | 12 | 12 | 12 |
| Hardware Alert Pins | 2 (GPIO0/ALERT0, GPIO1/ALERT1) | 2 | 1 | 1 |
| Supply Voltage | 1.8 V to 5.25 V | 1.8 V to 5.25 V | 1.8 V to 5.25 V | 1.8 V to 5.25 V |
| Packaging Form | Reel (-RL suffix) | Tray | Tray | Reel (-RL suffix) |
关键差异点
- Single-chip integration of ADC + DACs + temp sensor + GPIO （对比 AD7294BCPZ)
- Two hardware alert pins vs one （对比 AD7294BCPZ)
- 13-inch reel (-RL suffix) for high-volume SMT （对比 AD7292BCPZ (tray))
- Wide supply range 1.8V to 5.25V in a single part （对比 Analog Devices legacy AD7291)
设计说明
The 36-LFCSP-WQ (6x6 mm) package has an exposed thermal pad on its underside that must be soldered to a low-impedance ground plane for both electrical reference stability and thermal dissipation. At full ADC scan activity plus all four DAC outputs driving mid-scale loads, internal dissipation can approach 100 mW; without the ground-pad solder connection, junction temperature can rise 30-40 °C above ambient, which shifts the ±1°C temp-sensor reading and degrades ADC INL by ~0.3 LSB. Use 9 or more thermal vias in the exposed-pad region per the Analog Devices LFCSP-WQ land-pattern recommendation. This is a critical layout rule — failing to solder the pad voids electrical performance guarantees.
Decouple each of the AVDD and DVDD pins individually with a 100 nF ceramic (X7R or X5R, 0.1 uF) capacitor placed within 2 mm of the pin, and add a bulk 10 uF tantalum or ceramic on each supply rail at the board entry point. Per ADI layout guidelines, sharing one decoupling capacitor across multiple supply pins is not sufficient — each pin needs its own local high-frequency decoupling to suppress SPI-activity-induced transients from coupling into analog inputs. The internal reference (REFOUT pin) requires a 0.1 uF ceramic capacitor placed close to the pin; omitting this capacitor causes ADC gain error to drift by several LSBs.
Route the analog input traces (VIN0-VIN7) as short as possible, shielded by a ground guard trace or routed over a continuous ground pour. Keep digital SPI traces (SCLK, DIN, DOUT, CS) physically separated from analog input traces by at least 3x the trace-to-trace spacing, or shield them with ground traces. Per ADI reference designs, digital switching edges on SPI at 25 MHz can couple 1-2 LSB of noise into adjacent analog inputs if traces are run parallel for more than 10 mm. For mixed-signal boards, the digital ground (DGND) and analog ground (AGND) should meet at a single star point near the IC, not at the board edge.
Do not exceed the absolute-maximum AVDD/DVDD of 6.5 V — even brief transients above 5.5 V during hot-plug or load-dump events can permanently damage the device. When using the AD7292BCPZ-RL in automotive 12 V battery systems, place a TVS clamp and series resistor on the supply rail before the LFCSP. Also: the SPI mode for AD7292 is mode 1 (CPHA = 1, CPOL = 0) — configuring the host MCU to mode 0 instead results in a busy-state lockup that requires a hardware RESET to clear. Verify the SPI mode and reset polarity against the datasheet timing diagram before connecting to the host.
Estimated: with all 8 ADC channels enabled and 625 kS/s aggregate throughput, the SPI bus operates around 10-20 MHz depending on the chosen clock prescaler. The DOUT pin has limited drive strength (~5 mA source/sink), so add a series resistor of 33 ohm near the IC if the SPI traces exceed 50 mm or the host MCU is on a separate board. Ground-bounce on long parallel runs can otherwise corrupt the DOUT return signal. For multi-board systems, route DOUT, SCLK, CS in a controlled-impedance bus (50 ohm) where practical.
合规信息
RoHS and lead-free per the Analog Devices material declaration for the 36-LFCSP-WQ package. HALOGEN_FREE marker set to unknown because the verified web data did not state a halogen-free designation. AEC-Q100 not_applicable because the verified data lists the AD7292BCPZ-RL with Temperature Grade AUTOMOTIVE per the Vyrian listing — so AEC-Q100 status is manufacturer-qualified for the automotive-grade variant but this generic listing does not confirm it explicitly; designers needing AEC-Q100 should confirm with ADI documentation for their specific ordering code.
