AD7811YRZ-REEL7 - 10-Bit 350kSPS 4-Ch SAR ADC | Analog Devices
MPN: AD7811YRZ-REEL7 ✓ فعالAD7811YRZ-REEL7 جائزہ
A successive-approximation ADC is a sampling converter that uses an internal binary-weighted capacitive DAC and a comparator to perform a bit-at-a-time conversion, combining small die area and very low power consumption with deterministic throughput. The AD7811 family sits at the lower end of the SAR performance spectrum: slower than 1 MSPS pipeline ADCs but with no pipeline latency, lower glitch, and excellent DC accuracy for instrumentation and process-control loops. In the broader signal-chain hierarchy it belongs to the data-converter IC class, which is itself a sub-category of mixed-signal ICs under power management and analog signal-chain products. The AD7811's on-chip reference removes a common external BOM line, while the flexible input MUX eliminates an external analog switch tree for low-channel-count designs.
Key features include 2.3 µs conversion time, four analog input channels software-mapped to three pseudo-differential pairs, an internal 2.5 V reference with the option of an external reference override, a hardware/software conversion start input, and a software-controlled power-down mode. The serial interface supports daisy-chaining so two devices can share a single DSP serial bus by hard-wiring different device-address pins. Industrial-grade -40 °C to +105 °C operation is supported, making the part suitable for factory-floor embedded modules.
In typical applications the AD7811 is used as a general-purpose 10-bit digitiser in process-control front ends, portable battery-powered instrumentation, DSP front-end digitisation, multi-zone temperature or sensor monitoring with external signal conditioning, and industrial data-acquisition boards. Because the part integrates both the reference and the track/hold, designers can shrink the analog front end to a small RC anti-alias filter and a few bypass capacitors.
Design consideration: place a 0.1 µF ceramic bypass close to VDD and a 10 µF tantalum or ceramic bulk capacitor; keep analog and digital ground returns separated under the IC and join them only at the board's star-point ground. The internal reference settles in microseconds, but conversions started immediately after power-up may show 1-2 LSB extra offset until the reference settles, so issue a dummy conversion during firmware init.
کے لیے ڈراپ اِن متبادل AD7811YRZ-REEL7 — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں AD7811YRZ-REEL7 (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Number of Channels, Operating Temperature, Package, Architecture, Data Interface.
AD7811YRZ-REEL
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
AD7812YRZ-REEL7
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
AD7811YRZ-REEL
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
AD7472ARUZ-REEL
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →AD7265BCPZ-REEL
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →AD7811YRZ-REEL7 زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| ریزولوشن | 10 bits |
| Number of Channels | 4 single-ended / 3 pseudo-differential |
| Conversion Time | 2.3 µs |
| سیمپلنگ ریٹ | 350 kSPS |
| Architecture | SAR (Successive Approximation) |
| سپلائی وولٹیج | 2.7 V to 5.5 V (single supply) |
| اِن پٹ وولٹیج رینج | 0.0 V to 3.6 V (with internal reference) |
| On-Chip Reference | 2.5 V (internal, external override supported) |
| Data Interface | Serial, DSP-compatible |
| Track/Hold Amplifier | On-chip |
| پیکیج | 16-SOIC (0.150 inch, 3.90 mm width) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| آپریٹنگ درجہ حرارت | -40 °C to +105 °C (Industrial) |
| Packaging | Tape & Reel (REEL7 - 7-inch reel) |
| Power-Down Mode | Software-controlled |
| RoHS اسٹیٹس | Compliant |
AD7811YRZ-REEL7 پن کنفیگریشن
| پن 1 | VIN1 — Analog input channel 1 (single-ended or pseudo-diff positive) |
| پن 2 | VIN2 — Analog input channel 2 (single-ended or pseudo-diff positive) |
| پن 3 | VIN3 — Analog input channel 3 (single-ended or pseudo-diff positive) |
| پن 4 | VIN4 — Analog input channel 4 (single-ended only) |
| پن 5 | DOUT — Serial data output (DSP/MCU compatible) |
| پن 6 | SCLK — Serial interface clock input |
| پن 7 | CONVST — Conversion start input (rising edge initiates conversion) |
| پن 8 | CS — Chip select (active low) |
| پن 9 | ADDRESS — Device address select for multi-device serial bus sharing |
| پن 10 | REF — 2.5 V reference in/out (decouple with 0.1 µF + 10 µF) |
| پن 11 | NC — Not connected (per datasheet) |
| پن 12 | AGND — Analog ground |
| پن 13 | VDD — Positive supply (2.7 V to 5.5 V); decouple with 0.1 µF + 10 µF |
| پن 14 | NC — Not connected (per datasheet) |
| پن 15 | NC — Not connected (per datasheet) |
| پن 16 | DGND — Digital ground (tie to AGND at single-point star) |
عام استعمالات
AD7811YRZ-REEL7 کے لیے موزوں ہے 6 ایپلیکیشنs: Industrial Process Control Front-End, Portable Battery-Powered Instrumentation, DSP Front-End Digitisation, Multi-Zone Temperature / Sensor Monitoring, Closed-Loop Motor / Actuator Feedback, Data-Acquisition Card Plug-In Modules.
Industrial Process Control Front-End
The AD7811YRZ-REEL7 is a strong fit for industrial process-control front ends where 10-bit accuracy over 0-3.6 V inputs is sufficient for transducer digitisation. Its 350 kSPS throughput comfortably digitises multiplexed thermocouple, RTD, or 4-20 mA shunt signals at hundreds of Hz per channel, and the internal 2.5 V reference eliminates one external component. Placed behind a low-pass anti-alias RC filter on each of four inputs, it shares its serial bus with the host MCU or DSP and uses software power-down between conversions to minimise board quiescent current.
تجویز کردہ
Portable Battery-Powered Instrumentation
The AD7811YRZ-REEL7's 2.7-5.5 V single-supply operation and software power-down to microampere-level current make it ideal for handheld multimeters, data loggers, and field-portable test gear. Its 350 kSPS throughput is far above what slow-sensor logging needs, but lets the host oversample and average for noise reduction. The internal track/hold amplifier eliminates the need for an external buffer, and the SOIC-16 footprint occupies only ~30 mm² of PCB area - critical for compact portable enclosures.
تجویز کردہ
DSP Front-End Digitisation
The AD7811YRZ-REEL7's DSP-compatible serial interface lets it stream converted data directly into the synchronous serial port of Analog Devices ADSP-21xx or TI TMS320-family DSPs without glue logic. Its deterministic SAR latency - no pipeline delay - makes code simpler because each conversion result is ready exactly N clock cycles after the start edge. Two AD7811s can share one DSP serial bus by hard-wiring different device-address pins, doubling channel count without adding an SPI controller.
تجویز کردہ
Multi-Zone Temperature / Sensor Monitoring
The AD7811YRZ-REEL7's four-input MUX lets one ADC monitor four thermistor or RTD-divider signals in sequence, replacing four single-channel ADCs in multi-zone HVAC, refrigeration, or rack-monitoring applications. Pseudo-differential configuration rejects common-mode noise injected by long sensor cables - a major benefit in industrial wiring where ground bounce is common. With its 350 kSPS throughput the part can scan all four zones in <12 µs, leaving the host MCU free for comms and housekeeping.
تجویز کردہ
Closed-Loop Motor / Actuator Feedback
In closed-loop position, current, or velocity feedback the AD7811YRZ-REEL7 digitises shunt current or position-potentiometer voltages at 350 kSPS with no pipeline delay - a key advantage over pipeline ADCs whose latency complicates PID loop tuning. The 10-bit resolution is sufficient for non-precision actuator drivers (fans, pumps, conveyor motors) where cost-per-channel matters. Its industrial -40 to +105 °C rating supports underhood and motor-housing ambient temperatures.
تجویز کردہ
Data-Acquisition Card Plug-In Modules
The AD7811YRZ-REEL7 is widely used in legacy PC/104, CompactPCI, and micro-controller plug-in DAQ cards where 10-bit accuracy and a 16-pin narrow-SOIC footprint minimise board area and BOM cost. Its industrial -40 to +105 °C rating and surface-mount SOIC package support both slot-card and stackable-card form factors. Designers often combine two AD7811s on one SPI bus for 8-channel cards at a per-channel cost well below that of dedicated 8-channel ADCs.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا AD7811YRZ-REEL7 — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | AD7811YRZ-REEL | AD7812YRZ-REEL7 | AD7472ARUZ-REEL | AD7265BCPZ-REEL |
|---|---|---|---|---|---|
| Package | 16-SOIC (0.150 inch) | 16-SOIC (0.150 inch) - same | 16-SOIC (0.150 inch) - same | TSSOP-16 (compatible family) | LFCSP-32 / SOIC compatible |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 10 bits | 10 bits | 12 bits | 12 bits | 12 bits |
| Sampling Rate | 350 kSPS | 350 kSPS | 350 kSPS | 1 MSPS | 1 MSPS |
| Input Channels | 4 single / 3 pseudo-diff | 4 single / 3 pseudo-diff | 4 single / 3 pseudo-diff | 1 single-ended | 2 differential |
| Internal Reference | 2.5 V | 2.5 V | 2.5 V | External only | External only |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Operating Temperature | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +85 °C | -40 °C to +105 °C |
اہم امتیازی خصوصیات
- Drop-in same-family 12-bit upgrade path on identical SOIC-16 footprint (بمقابلہAD7812YRZ-REEL7)
- Internal 2.5 V reference eliminates a BOM line and PCB area (بمقابلہAD7472ARUZ-REEL)
- Pseudo-differential input flexibility with single-ended mode (بمقابلہAD7265BCPZ-REEL (true differential only))
ڈیزائن نوٹس
Decouple VDD (pin 13) with a 0.1 µF X7R ceramic placed within 3 mm of the pin, plus a 10 µF tantalum or ceramic bulk capacitor shared with the digital rail. Reference pin (pin 10) needs its own 0.1 µF + 10 µF decoupling stack to keep noise below 1 LSB. Software power-down (via control register bit) drops supply current to a few µA - use this aggressively in battery designs to extend runtime, but issue one dummy conversion after wake-up to flush reference-settling transients.
Keep analog (AGND, pin 12) and digital (DGND, pin 16) ground returns separated under the IC and join them at the board's single star-point ground near the power-entry or connector. Route serial-interface traces (DOUT, SCLK, CONVST, CS) on the digital side and analog input traces (VIN1-4) on the analog side; cross over at 90° only if necessary. Place anti-alias RC filters (typically 1 kΩ + 1 nF) within 5 mm of the analog input pins to avoid picking up digital switching noise before the track/hold amplifier samples the signal.
Do not leave unused analog input pins floating when using pseudo-differential mode - tie them to mid-supply (or to the COM pin) to prevent charge-injection from the input MUX injecting kickback noise into active channels. Note that AD7811YRZ-REEL7 (SOIC-16) and AD7811YRU (TSSOP-16) are NOT pin-compatible; verify your PCB footprint before substitution. The -REEL7 suffix means 7-inch tape-and-reel carrier - if your assembly line uses tube feeders, order -REEL (no 7) or -REEL7 with proper reel-handling equipment.
تعمیل کی معلومات
RoHS and REACH compliant per Analog Devices product page. Not AEC-Q100 qualified - this is an industrial-grade part. Lead-free matte-tin plating. Halogen-free molding compound. Conflict-minerals declaration available from Analog Devices.
