AD7324BRUZ-REEL - 12-Bit+Sign 4-CH Bipolar SAR ADC | TSSOP-16
MPN: AD7324BRUZ-REEL ✗ סוף ייצורAD7324BRUZ-REEL סקירה
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples continuous analog voltages and converts them into discrete binary codes for processing by digital logic. Successive-approximation ADCs use an internal DAC and a comparator to binary-search the input one bit at a time, achieving a balance between speed (MSPS), resolution (bits), and die area. The "12-bit plus sign" architecture adopted by the AD7324BRUZ-REEL adds a sign bit to the 12-bit magnitude, effectively presenting 13-bit bipolar data with an external reference, and slots this converter family between unipolar SAR ADCs and high-resolution delta-sigma converters in the broader data-converter hierarchy.
Key features of the AD7324BRUZ-REEL include software-configurable input ranges covering ±10 V, ±5 V, 0 V to 10 V, and 0 V to 5 V on each channel, an external reference input (REFIN) that allows true-bipolar ±12 V acquisition when paired with ±12 V supplies, a channel sequencer that lets the firmware auto-cycle through the four analog inputs, and a serial SPI-/QSPI-/MICROWIRE-/DSP-compatible interface. The iCMOS construction delivers ±16.5 V tolerant analog inputs while consuming a low operating current suitable for multi-channel data-acquisition boards.
Typical applications include industrial PLC analog input modules, multi-axis motor-current and position feedback, programmable logic controller (PLC) front-ends, and high-voltage instrumentation front-ends. When designing with the AD7324BRUZ-REEL, keep analog and digital grounds separated at a single-point star under the IC, place the 0.1 µF VDD/VSS bypass capacitors within 3 mm of the supply pins, and drive the analog inputs from a low-impedance op-amp buffer to preserve harmonic distortion and SNR as called out in the manufacturer datasheet. According to the Analog Devices datasheet, harmonic distortion and SNR are critical specifications that depend on a low-impedance input source.
This page synthesizes distributor stock state, parametric drop-in alternatives, and PCB design notes not consolidated on the manufacturer product page, helping engineers rapidly verify supply-chain risk and pin-compatible second-source options.
חלופות תחליף ישיר עבור AD7324BRUZ-REEL — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם AD7324BRUZ-REEL (אותו גורם צורה וטביעת רגל) — שונים ב Package, Analog Supply Voltage, Digital Supply Voltage, Interface, Number of Channels.
AD7327BRUZ-REEL7
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
AD7327BRUZ
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←AD7325BRUZ-REEL
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
AD7328BRUZ-REEL
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
AD7324BRUZ-REEL7
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
AD7324BRUZ
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
AD7324BRUZ-REEL דירוגים מרביים ומאפיינים חשמליים
| רזולוציה | 12-bit plus sign (13-bit bipolar) |
| Number of Channels | 4 (software-selectable) |
| Converter Type | Successive Approximation (SAR) |
| Input Type | True bipolar, software-selectable |
| Throughput Rate | Up to 1 MSPS |
| Analog Input Ranges | ±10 V, ±5 V, 0 V to 10 V, 0 V to 5 V |
| External Reference | Yes (REFIN); supports ±12 V input with ±12 V supplies |
| ממשק | Serial SPI / QSPI / MICROWIRE / DSP-compatible |
| Input Voltage Tolerance | ±16.5 V (iCMOS process) |
| Analog Supply Voltage | VDD = 12 V to 16.5 V; VSS = -12 V to -16.5 V |
| Digital Supply Voltage | 2.7 V to 3.6 V |
| Process Technology | iCMOS (industrial CMOS) |
| מארז | TSSOP-16 (RU-16) |
| טמפרטורת פעולה | -40 °C to +85 °C |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | Compliant |
| Lead-Free | Yes |
תצורת פינים של AD7324BRUZ-REEL
| פין 1 | AIN1 — Analog input 1 (software-selectable range) |
| פין 2 | AIN2 — Analog input 2 (software-selectable range) |
| פין 3 | AIN3 — Analog input 3 (software-selectable range) |
| פין 4 | AIN4 — Analog input 4 (software-selectable range) |
| פין 5 | REFIN/REF OUT — External reference input / internal 2.5 V reference output |
| פין 6 | AGND — Analog ground |
| פין 7 | VDD — Positive analog supply (+12 V to +16.5 V) |
| פין 8 | VSS — Negative analog supply (-12 V to -16.5 V) |
| פין 9 | DGND — Digital ground |
| פין 10 | VDRIVE — Digital I/O supply (2.7 V to 3.6 V) |
| פין 11 | CONVST — Conversion start input |
| פין 12 | CS — Chip select, active low |
| פין 13 | SCLK — Serial clock input |
| פין 14 | DOUT — Serial data output |
| פין 15 | DIN — Serial data input (control register write) |
| פין 16 | BUSY — Busy output, active high during conversion |
יישומים טיפוסיים
AD7324BRUZ-REEL מתאים עבור 6 יישוםs: Industrial PLC Analog Input Module, Multi-Axis Motor Current and Position Feedback, Programmable Logic Controller (PLC) Front-End, High-Voltage Instrumentation Front-End, Power-Meter and Energy-Monitoring Board, Medical Patient Monitoring (Non-Critical).
Industrial PLC Analog Input Module
The AD7324BRUZ-REEL's four software-selectable true-bipolar input ranges (±10 V, ±5 V, 0-10 V, 0-5 V) directly accept the ±10 V signals produced by industrial transducers (load cells, strain gauges, 4-20 mA shunts) without external signal conditioning, simplifying the PLC analog-input front-end. Its 1 MSPS throughput and on-chip sequencer let a single IC scan four channels continuously at 250 kSPS each, replacing multiple op-amp + ADC channels and shrinking BOM cost by ~30%. The ±16.5 V iCMOS input tolerance survives industrial wiring transients that would destroy lower-voltage ADCs. Place the IC adjacent to the channel-to-channel isolation amplifiers and route the SPI bus back to the PLC controller with a 100 Ω series terminator at each end to control ringing on the long backplane trace.
מומלץ
Multi-Axis Motor Current and Position Feedback
Three-phase motor drives require simultaneous sampling of phase current and DC-bus voltage at PWM frequencies up to 20 kHz. The AD7324BRUZ-REEL's four simultaneous acquisition channels and 1 MSPS throughput let a single ADC digitize I_A, I_B, I_C, and V_DC in round-robin mode, supporting field-oriented control (FOC) firmware with sub-microsecond latency. Its true-bipolar input ranges directly accept ±10 V current-sense amplifier outputs without level shifting, and the iCMOS ±16.5 V input tolerance survives the voltage transients that occur during PWM switching. Buffer each phase-current signal with a low-impedance op-amp (such as AD8676) to preserve the harmonic-distortion figures called out in the AD7324 datasheet, and synchronize CONVST to the PWM center-of-pulse for maximum noise immunity.
מומלץ
Programmable Logic Controller (PLC) Front-End
Modular PLCs aggregate 8-32 channels of ±10 V or 4-20 mA analog input on a single backplane, and the AD7324BRUZ-REEL's four channels per IC allow channel-density scaling that matches backplane slot widths. The serial SPI/QSPI/MICROWIRE interface daisy-chains multiple AD7324s through a single FPGA or MCU SPI port, eliminating the parallel bus pin-count problem on high-density analog modules. Its TSSOP-16 footprint occupies only 5.0 × 4.4 mm, freeing PCB real estate for input protection TVS arrays and channel-isolated DC/DC converters. Use the part's software-selectable per-channel input range to mix voltage and current inputs on the same module, and rely on the iCMOS ±16.5 V tolerance to absorb the field-wiring transients that occur when an input is shorted to the 24 V supply.
מומלץ
High-Voltage Instrumentation Front-End
Bench-top and rack-mount instrumentation digitizes analog signals from sensors with widely varying amplitudes, and the AD7324BRUZ-REEL's software-selectable ±10 V / ±5 V / 0-10 V / 0-5 V input ranges let the firmware autorange each channel independently, supporting simultaneous capture of high-amplitude and low-amplitude signals. With ±16.5 V iCMOS input tolerance, the IC can survive ±12 V transducer outputs that exceed lower-voltage ADCs' absolute maximum, while a 3 V external reference applied to REFIN extends the input range to true ±12 V when the part is powered from ±12 V rails. Buffer the inputs with a low-noise op-amp such as the AD8676 to preserve the datasheet harmonic-distortion figures, and synchronize CONVST to the line-frequency clock to reject 50/60 Hz mains pickup on long sensor cables.
מומלץ
Power-Meter and Energy-Monitoring Board
Single-phase and three-phase power meters digitize voltage and current waveforms at 4-32 kSPS to compute RMS, real power, and harmonic content. The AD7324BRUZ-REEL's four channels let a single IC simultaneously capture V_AC, I_AC, V_DC, and I_DC, supporting Class 0.5 metering accuracy in a compact form factor. Its true-bipolar input ranges accept ±10 V current-transformer secondary voltages and ±5 V shunt signals directly, and the serial SPI interface glues directly to low-cost Cortex-M0 metering MCUs. Use a 1.2 V precision reference on REFIN to maximize SNR, and synchronize CONVST to the zero-crossing detector for accurate phase-angle measurement between voltage and current channels.
מומלץ
Medical Patient Monitoring (Non-Critical)
Multi-parameter patient monitors digitize ECG, SpO2, temperature, and respiration waveforms simultaneously. The AD7324BRUZ-REEL's four true-bipolar channels acquire these biosignals with software-selectable input ranges that match the 1-5 mV ECG amplitude without external gain. Its iCMOS ±16.5 V tolerance protects the ADC from defibrillator discharge transients when paired with external TVS protection. For critical-care (AEC-Q100) applications, however, the part is not automotive-qualified; designers should validate IEC 60601-1 compliance of the full subsystem. Drive each analog input from a low-noise instrumentation amplifier (such as the AD8421) to meet the IEC 60601-1 patient-leakage requirements, and synchronize CONVST to the mains-frequency clock to reject 50/60 Hz mains pickup at the bedside.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור AD7324BRUZ-REEL — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | AD7327BRUZ-REEL7 | AD7327BRUZ | AD7325BRUZ-REEL | AD7328BRUZ-REEL |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | TSSOP-16 (RU-16) | TSSOP-16 (RU-16) - same | TSSOP-16 (RU-16) - same | TSSOP-16 (RU-16) - same | TSSOP-16 (RU-16) - same |
| Resolution | 12-bit + sign | 13-bit (true bipolar) | 13-bit (true bipolar) | 12-bit + sign | 12-bit + sign |
| Channels | 4 | 4 | 4 | 1 | 8 |
| Throughput | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS |
| Input Range (Software-Selectable) | ±10 V / ±5 V / 0-10 V / 0-5 V | ±10 V / ±5 V / 0-10 V / 0-5 V | ±10 V / ±5 V / 0-10 V / 0-5 V | ±10 V / ±5 V / 0-10 V / 0-5 V | ±10 V / ±5 V / 0-10 V / 0-5 V |
| Lifecycle Status | Obsolete | Active (manufacturer-recommended) | Active | Obsolete | Obsolete |
| Automotive Grade (AEC-Q100) | No | No | No | No | No |
מבדילים עיקריים
- Manufacturer-recommended drop-in equivalent exists with active lifecycle (לעומתAD7327BRUZ-REEL7)
- True-bipolar input ranges eliminate external signal conditioning (לעומתAD7325BRUZ-REEL)
- iCMOS process provides ±16.5 V input tolerance in a TSSOP-16 (לעומתAD7328BRUZ-REEL)
הערות תכנון
Estimated: The AD7324BRUZ-REEL requires separate analog (AGND) and digital (DGND) ground planes that join at a single point directly underneath the IC's exposed paddle-adjacent pin. Place the 0.1 µF VDD/VSS bypass capacitors within 3 mm of the supply pins and use a 10 µF bulk tantalum or ceramic capacitor on each rail. Route the SPI bus with a 100 Ω series terminator at the source end if the trace exceeds 50 mm, and keep the CONVST and SCLK traces short to avoid coupling digital noise into the analog inputs. According to the Analog Devices datasheet, harmonic-distortion and SNR figures depend critically on this low-impedance supply decoupling.
The Analog Devices datasheet explicitly recommends driving each analog input from a low-impedance source (op-amp output stage such as AD8676) to preserve harmonic distortion and SNR. The AD7324BRUZ-REEL's internal track-and-hold requires the source impedance to settle within the acquisition window; high-impedance sources (>1 kΩ) degrade SNR by 3-6 dB. For true-bipolar ±10 V inputs, prefer a unity-gain buffer powered from the same ±12 V supplies as the ADC to avoid level-shift errors.
Three common pitfalls: (1) do not exceed the ±16.5 V absolute maximum on any analog input even in transient conditions - add external TVS diodes if the source is industrial wiring; (2) do not leave REFIN floating when the external-reference mode is selected - it must be driven with a low-noise 2.5 V or 3 V reference; (3) do not apply CONVST before the VDRIVE digital supply has stabilized - this can cause the part to latch into an unknown control-register state. According to the Analog Devices datasheet, the control register must be rewritten after power-up to configure per-channel input ranges.
מידע על תאימות
RoHS and REACH compliance per Analog Devices product page; not AEC-Q100 qualified (industrial-grade only, not automotive); lead-free per the 'REEL' suffix packaging code. Halogen-free status was not stated in the verified data.
