AD7327TRU-EP-RL7 - 12-Bit+Sign 500kSPS 8-Ch ADC | Analog Devices
MPN: AD7327TRU-EP-RL7 ✗ پایان تولیدAD7327TRU-EP-RL7 نمای کلی
A SAR (Successive-Approximation Register) ADC is a type of data converter that resolves a single analog sample by performing one conversion decision per clock cycle against an internal precision DAC and comparator, then delivering a fully settled digital code within N cycles for an N-bit output. SAR ADCs sit within the broader hierarchy of analog-to-digital converter -> data converter -> mixed-signal IC -> semiconductor, and are favored for applications that demand low latency, deterministic throughput, and DC precision without the pipeline delay of higher-speed flash or pipelined architectures.
Key features of the AD7327TRU-EP-RL7 include software-selectable input ranges of ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V on every channel, true bipolar operation on each input, an external reference option via the REFIN/OUT pin that extends the input range to ±12 V when a 3 V reference is applied, an integrated 8-channel MUX with simultaneous sample-and-hold in a 1:1 S/H-to-ADC ratio, and a sequencer that simplifies multi-channel scanning. The device operates from a 2.7 V to 5.25 V digital supply and ±12 V to ±16.5 V analog supplies, drawing typical power in the low-mA range, and includes software-configurable output coding in two's complement, straight binary, or sign-magnitude formats.
The AD7327-EP is implemented on Analog Devices' iCMOS (industrial CMOS) process technology, which combines high-voltage bipolar transistors with sub-micron CMOS to deliver true bipolar ±10 V or higher input swings on a single 5 V supply. This process allows the converter to be used directly at industrial signal levels without external signal conditioning or level shifting, while keeping power and package size compact for space-constrained designs.
Typical applications include industrial process control and PLC analog input modules, multichannel data acquisition front ends, defense and aerospace signal conditioning, motor control current/voltage monitoring, and any system requiring true bipolar measurement on multiple channels with deterministic throughput. The wide bipolar input range, channel-by-channel software configurability, and -EP qualification make the part particularly suited to ruggedized multi-channel measurement.
When designing with this device, ensure the analog and digital supplies are decoupled close to the pins with a 0.1 µF and 10 µF combination, sequence the analog supply before or simultaneously with the digital supply to avoid latch-up, and configure the input range register per channel before initiating conversion. The REFIN/OUT pin can be left as an internal 2.5 V reference or overdriven externally up to 3 V for ±12 V input range.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a faster procurement and replacement workflow for the AD7327TRU-EP-RL7.
جایگزین‌های drop-in برای AD7327TRU-EP-RL7 — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای AD7327TRU-EP-RL7 (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Operating Temperature Range, Package, Sampling Rate, Analog Supply Voltage, Data Interface.
AD7327TRUZ-EP-RL7
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
AD7327TRUZ-EP
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
AD7327BRUZ-REEL7
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
AD7327BRUZ
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←AD7328BRUZ
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
AD7327TRU-EP-RL7 حداکثر مقادیر مجاز و مشخصات الکتریکی
| Number of Bits | 12 bit + sign |
| نرخ نمونه‌برداری | 500 kSPS |
| Number of Inputs | 2, 3, or 4 (8-channel MUX) |
| Input Type | Differential, Pseudo-Differential, Single-Ended |
| Data Interface | SPI, DSP-compatible serial |
| Configuration | MUX-S/H-ADC |
| Ratio S/H:ADC | 1:1 |
| Architecture | SAR |
| محدوده ولتاژ ورودی | ±10 V, ±5 V, ±2.5 V, 0 to +10 V (software-selectable per channel); ±12 V with external 3 V reference |
| Analog Supply Voltage | ±12 V to ±16.5 V |
| Digital Supply Voltage | 2.7 V to 5.25 V |
| محدوده دمای کاری | -55 °C to +125 °C (military, -EP grade) |
| بسته‌بندی | 20-pin TSSOP (RU) |
| نوع نصب | Surface Mount |
| Packaging | Tape & Reel, 7-inch reel (RL7) |
| Process Technology | iCMOS |
| Reference | Internal 2.5 V or external up to 3 V on REFIN/OUT |
| Qualification | AQEC standard, defense/aerospace (-EP), DSCC drawing V62/14636 |
| Output Coding | Two's complement, straight binary, or sign-magnitude (software-selectable) |
پیکربندی پین AD7327TRU-EP-RL7
| پین 1 | AVCC — Analog positive supply (+12 V to +16.5 V) |
| پین 2 | AGND — Analog ground |
| پین 3 | REFIN/OUT — Reference input/output (internal 2.5 V or external up to 3 V) |
| پین 4 | VINA0 — Analog input channel 0 |
| پین 5 | VINA1 — Analog input channel 1 |
| پین 6 | VINA2 — Analog input channel 2 |
| پین 7 | VINA3 — Analog input channel 3 |
| پین 8 | VINA4 — Analog input channel 4 |
| پین 9 | VINA5 — Analog input channel 5 |
| پین 10 | VINA6 — Analog input channel 6 |
| پین 11 | VINA7 — Analog input channel 7 |
| پین 12 | GND — Ground |
| پین 13 | DOUT — Serial data output (SPI/DSP) |
| پین 14 | DIN — Serial data input |
| پین 15 | SCLK — Serial clock |
| پین 16 | CS — Chip select (active low) |
| پین 17 | DGND — Digital ground |
| پین 18 | DVDD — Digital supply (2.7 V to 5.25 V) |
| پین 19 | RANGE — Range select / sequence control |
| پین 20 | CONVST — Conversion start |
کاربردهای معمول
AD7327TRU-EP-RL7 مناسب است برای 6 کاربردs: Industrial Process Control and PLC Analog Input Modules, Multichannel Data Acquisition Systems, Defense and Aerospace Signal Conditioning, Motor Control Current and Voltage Monitoring, Power Line and Energy Metering, Medical Patient Monitoring and Instrumentation.
Industrial Process Control and PLC Analog Input Modules
The AD7327TRU-EP-RL7 fits PLC analog input modules because its 8 input channels accept true bipolar ±10 V, ±5 V, ±2.5 V, or 0-10 V signals directly from industrial transducers (4-20 mA loops, ±10 V actuators) without external signal conditioning. With 500 kSPS throughput and software-configurable ranges per channel, a single IC replaces multiple discrete ADCs and front-end op-amps. The ±12 V to ±16.5 V analog supply headroom handles industrial 24 V common-mode environments, while the -55 °C to +125 °C military temperature grade supports outdoor and uncontrolled cabinet installations.
پیشنهادی
Multichannel Data Acquisition Systems
For data acquisition front ends digitizing multiple sensors simultaneously, the AD7327TRU-EP-RL7's integrated 8-channel MUX with 1:1 sample-and-hold and 12-bit+sign SAR core provides deterministic per-channel throughput. Software-selectable input ranges let one IC digitize thermocouples at ±50 mV (via external scaling), pressure transducers at ±10 V, and 4-20 mA current-loop shunts all on different channels. The 500 kSPS aggregate rate (62.5 kSPS per channel for full scanning) is more than adequate for vibration, thermal, and process DAQ systems.
پیشنهادی
Defense and Aerospace Signal Conditioning
The -EP suffix designates AQEC-standard qualification with -55 °C to +125 °C operation, controlled manufacturing baseline, one assembly/test site, one fabrication site, enhanced PCN, qualification data on request, and DSCC drawing V62/14636. These attributes satisfy defense and aerospace program requirements for ruggedized multi-channel sensor signal conditioning in avionics, naval, and ground-vehicle platforms. The true bipolar input capability handles MIL-STD-704 or DO-160 power-line sensor signals directly.
پیشنهادی
Motor Control Current and Voltage Monitoring
Three-phase motor drives need simultaneous current and voltage feedback on multiple shunt resistors and bus voltages; the AD7327TRU-EP-RL7's 8 channels and software-selectable ±10 V bipolar input ranges accommodate ±5 V or ±10 V shunt-amplifier outputs and 0-10 V bus dividers with a single IC. The 500 kSPS sample rate is sufficient for sub-10 kHz control-loop bandwidth with 50x oversampling headroom. Software-configurable two's-complement or sign-magnitude output coding simplifies fixed-point DSP math in motor-control firmware.
پیشنهادی
Power Line and Energy Metering
Energy meters digitize voltage and current channels with wide dynamic swings; the AD7327TRU-EP-RL7's ±10 V bipolar input range handles line-voltage resistor-divider outputs directly, while lower ranges (±2.5 V) accommodate current-shunt outputs in the same scan sequence. Per-channel software range selection lets one IC digitize both line voltage (±10 V) and shunt current (±0.25 V with gain) with optimal resolution. The -EP grade supports outdoor meter housings and industrial temperature extremes.
پیشنهادی
Medical Patient Monitoring and Instrumentation
Although not a medical-grade qualified part by default, the AD7327TRU-EP-RL7's wide bipolar input range, 8 channels, and 500 kSPS throughput make it suitable for multi-parameter instrumentation such as patient monitors digitizing ECG, EEG, SpO2, temperature, and respiration channels. Per-channel software-configurable ranges let designers optimize resolution for each sensor type (e.g., ±5 V for ECG, ±2.5 V for temperature) without external PGAs. The wide operating temperature range supports continuous-monitoring bedside equipment.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای AD7327TRU-EP-RL7 — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | AD7327TRUZ-EP-RL7 | AD7327TRUZ-EP | AD7327BRUZ-REEL7 | AD7327BRUZ | AD7328BRUZ |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 20-TSSOP | 20-TSSOP - same | 20-TSSOP - same | 20-TSSOP - same | 20-TSSOP - same | 20-TSSOP - same |
| Resolution | 12-bit + sign | 12-bit + sign | 12-bit + sign | 12-bit + sign | 12-bit + sign | 13-bit (no sign) |
| Sampling Rate | 500 kSPS | 500 kSPS | 500 kSPS | 500 kSPS | 500 kSPS | 500 kSPS |
| Number of Channels | 8 | 8 | 8 | 8 | 8 | 8 |
| Temperature Grade | Military -55 °C to +125 °C (-EP) | Military -55 °C to +125 °C (-EP) | Military -55 °C to +125 °C (-EP) | Commercial | Commercial | Commercial |
| Terminal Finish | SnPb (TRU) | Lead-free (Z-suffix) | Lead-free (Z-suffix) | Lead-free | Lead-free | Lead-free |
| Defense/Aerospace Qualification (AQEC) | Yes (-EP) | Yes (-EP) | Yes (-EP) | No | No | No |
| Lifecycle Status | Obsolete | Active | Active | Active | Active | Active |
تفاوت‌های کلیدی
- True bipolar ±10 V input without external signal conditioning (در مقابلAD7327BRUZ-REEL7)
- Software-selectable per-channel input ranges (در مقابلAD7328BRUZ)
- Extended ±12 V input range with external 3 V reference (در مقابلAD7265BCPZ-REEL)
یادداشت‌های طراحی
The AD7327-EP requires separate analog and digital supplies (AVCC = +12 V to +16.5 V; DVCC = 2.7 V to 5.25 V) plus a negative analog supply, per the AD7327-EP datasheet. Decouple AVCC and DVCC close to the IC pins with a parallel combination of 10 µF tantalum/ceramic and 0.1 µF ceramic; sequence the analog supply before or simultaneously with the digital supply to prevent CMOS latch-up via parasitic thyristor paths. The negative supply rail must be present before any analog input exceeds its common-mode range.
Use a star-ground topology separating AGND and DGND at the IC, joined at a single point near the ADC. Place the 0.1 µF supply decoupling capacitor within 2 mm of each supply pin and route analog input traces as guard-protected differential pairs to minimize common-mode noise pickup from the digital SPI bus. Keep the REFIN/OUT trace short and surround it with a ground guard ring; if an external reference is used, buffer it close to the pin with a low-noise op-amp.
Do not exceed ±16.5 V on AVCC or ±25 V on any analog input; the device's true bipolar ±10 V/±12 V input ranges assume supplies within their specified limits. Always configure the per-channel input-range register before initiating conversion on that channel; otherwise the channel returns full-scale or zero codes depending on default register state. For external reference operation above 3 V on REFIN/OUT, the analog input range scaling becomes invalid - reference voltages above 3 V are not supported per the AD7327-EP datasheet.
اطلاعات انطباق
TRU-suffix indicates SnPb terminal finish (not lead-free); the Z-suffix variants (AD7327TRUZ-EP-RL7) are lead-free RoHS-compliant equivalents. -EP suffix indicates AQEC defense/aerospace qualification with DSCC drawing V62/14636. AEC-Q100 is not applicable (automotive-grade qualification is not targeted by this part).
