My Inquiry
My Account
Analog Devices Inc. AD7725BS-REEL
- Part No.:
- AD7725BS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 44-QFP
- Datasheet:
-
AD7725BS-REEL.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 44-MQFP
- Quantity:
- Payment:
- Shipping:
Inventory:800
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7725BS-REEL from Analog Devices is a 16-bit, 900 kSPS sigma-delta ADC with integrated programmable postprocessor for real-time signal conditioning. It delivers 83 dB SNR (unipolar mode), supports ±4/5 VREF2 differential or 0–8/5 VREF2 single-ended input ranges, and operates with 5 V analog/digital supplies across –40°C to +85°C. It is used in radar front-ends requiring high-resolution digitization of band-limited IF signals.
For engineers reviewing the AD7725BS-REEL datasheet, AD7725BS-REEL pinout, AD7725BS-REEL application, or AD7725BS-REEL equivalent, key selection criteria include its 108-tap FIR/IIR postprocessing capability, internal 2.5 V reference with ±3 mV offset, 44-lead MQFP package, and support for boot-from-EPROM or DSP-hosted configuration - all critical for embedded signal acquisition systems demanding deterministic latency and flexible filter deployment.
Technical Context
The AD7725BS-REEL integrates a sigma-delta modulator followed by three cascaded FIR filters and a fully user-programmable postprocessor capable of 130 million MACs/sec. Its digital signal path accepts configuration files generated via Analog Devices' Filter Wizard tool, enabling custom decimation, filtering, and polynomial conditioning up to 8th order.
It supports dual clocking modes: crystal oscillator (XTAL/CLKIN) or external clock (CLKIN only), with configurable master clock up to 14.4 MHz. The device offers parallel (16-bit DB0–DB15) and serial (SDI/SDO/SCO/FSI/FSO) interfaces, and features dedicated control pins for SYNC (multi-device synchronization), STBY (low-power standby), and HALF_PWR (analog power scaling).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonic output with ±0.5 LSB DNL and ±2 LSB INL over full temperature range. |
| Max Output Rate | 900 kSPS - achieved at fCLKIN/16 with default filter; enables real-time capture of signals up to 350 kHz bandwidth. |
| SNR (Unipolar) | 83 dB - measured at 0.5×fO with 2.5 V reference; ensures high dynamic range for low-noise sensor or IF digitization. |
| Input Range | ±4/5 VREF2 (differential bipolar) or 0–8/5 VREF2 (single-ended unipolar) - configurable via UNI pin for flexible transducer interfacing. |
| Reference | On-chip 2.5 V ±3 mV offset buffer (REF2), 60 ppm/°C drift - eliminates need for external precision reference in cost-sensitive designs. |
| Power Supply | AVDD/DVDD = 4.75–5.25 V - single 5 V rail simplifies power architecture; AIDD = 33 mA / DIDD = 90 mA at 9.6 MHz. |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive auxiliary functions per ordering row specification. |
Pinout & Package
AD7725BS-REEL is housed in a 44-lead Metric Quad Flatpack (MQFP), S-44-2 package, with exposed thermal pad (not electrically connected). Pin layout supports both serial and parallel operation via mode-select pin S/P; pin functions change between modes (e.g., DB0–DB15 serve as data I/O in parallel mode, but SDI/SDO/SCO/FSI/FSO in serial mode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EFMT/DB2) | Serial clock format select / Data bit 2 | Selects SCO edge for SDI sampling in serial mode; provides LSB-aligned data I/O in parallel mode. |
| 5 (DVAL/INT) | Data valid flag / Interrupt output | Signals postprocessor overflow (serial) or requests service for config completion/read-ready/error (parallel). |
| 12 (CLKIN) | Master clock input | Accepts 1–14.4 MHz external clock; drives all internal timing including modulator, filters, and interface logic. |
| 20 (VIN(+)) & 19 (VIN(–)) | Differential analog input terminals | High-impedance inputs accepting ±4/5 VREF2; common-mode range tied to AGND; require matched PCB routing. |
| 30 (SOE/CS) | Serial output enable / Chip select | Active-high interrupt in DSP mode; active-low chip select in parallel mode - enables shared bus arbitration. |
| 42 (INIT/DB5) | Conversion start control / Data bit 5 | Halts/resumes conversion without resetting configuration; essential for synchronized multi-ADC sampling. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable postprocessor | 130 million MAC/sec processing with up to 108-tap FIR/IIR and 8th-order polynomial conditioning - enables on-chip decimation and spectral shaping without FPGA offload. |
| Filter Wizard integration | Configuration file generation via Analog Devices' PC-based tool - eliminates manual coefficient calculation and reduces firmware development time for custom filter deployment. |
| Dual interface support | Parallel (16-bit DB0–DB15) and serial (SPI-like with FSI/FSO framing) - allows direct DSP connection or microcontroller integration with minimal GPIO overhead. |
| Multi-device synchronization | SYSYNC pin resets digital filter sequencer and postprocessor core - ensures simultaneous sampling and coherent output alignment across multiple AD7725BS-REEL units. |
| Internal reference with buffer | 2.5 V ±3 mV offset, 60 ppm/°C drift, 3.5 kΩ output impedance - meets accuracy requirements for medium-performance applications without external reference cost or layout complexity. |
Applications
| Radar Signal Digitization | Sonar Echo Processing |
|---|---|
|
Use Scenario: Digitizing intermediate frequency (IF) outputs from radar receiver mixers with narrowband filtering and high SNR preservation. IC Role / Device Role / Timing Role: Primary sigma-delta ADC performing 16-bit conversion at 900 kSPS, followed by programmable FIR decimation to suppress out-of-band clutter and harmonics. Use Value: Eliminates external DSP preprocessing for baseband extraction; internal 108-tap filter achieves >70 dB stopband attenuation at 116 kHz while maintaining group delay stability. |
Use Scenario: Capturing low-frequency underwater echo returns (10–200 kHz) with high dynamic range and minimal phase distortion. IC Role / Device Role / Timing Role: High-linearity ADC front-end with differential input and on-chip 2.5 V reference, configured via serial interface for adaptive decimation based on water depth. Use Value: Achieves 83 dB SNR in unipolar mode at 350 kHz input bandwidth - sufficient to resolve weak echoes amid ambient noise without external amplification stages. |
| Auxiliary Automotive Functions | Medical Communications Interface |
|
Use Scenario: Monitoring battery voltage, cabin temperature, and motor current in body control modules under extended temperature cycling. IC Role / Device Role / Timing Role: General-purpose precision ADC with robust 5 V supply tolerance, –40°C to +85°C qualification, and built-in reference for sensor signal chain consolidation. Use Value: Reduces BOM count by integrating reference, filter, and interface logic - validated for automotive auxiliary use per ordering row specification. |
Use Scenario: Digitizing analog telemetry signals (ECG, pulse oximetry) in portable diagnostic devices requiring low power and compact layout. IC Role / Device Role / Timing Role: Low-noise ADC with standby mode (STBY pin) and HALF_PWR option - cuts analog current to ~16.5 mA when configured for 9.6 MHz operation. Use Value: Enables battery-powered operation with <30 mW standby power and fast wake-up (<10 µs settling after STBY deassertion) for event-triggered acquisition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sigma-delta ADC with programmable filtering applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7722BRUZ | 16-bit, 100 kSPS, no programmable postprocessor; fixed FIR filter only; 28-TSSOP package. | Lacks MAC engine and Filter Wizard support - suitable only for static filter requirements, not adaptive signal conditioning. | Choose when system-level DSP handles filtering and board space is constrained (TSSOP vs MQFP). |
| ADS127L01IPBS | 16-bit, 521 kSPS, no on-chip reference; requires external 2.5 V reference; 32-QFN package; SPI-only interface. | Higher speed but no internal reference or parallel interface - increases external component count and limits host processor flexibility. | Prefer for high-throughput, space-constrained designs where external reference and SPI compatibility are acceptable trade-offs. |
Compared with AD7725BS-REEL, AD7722BRUZ offers smaller footprint but forfeits real-time programmability, while ADS127L01IPBS delivers higher throughput yet demands external reference design and lacks parallel bus support - making AD7725BS-REEL uniquely suited for systems needing self-contained, reconfigurable signal conditioning in industrial temperature-grade MQFP packaging.
Availability
AD7725BS-REEL is available at Aetrix Electronics and suitable for radar front-ends, sonar echo processors, and automotive auxiliary monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7725BS-REEL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7725BS-REEL belongs to Analog Devices' precision sigma-delta ADC product line, designed specifically for embedded signal acquisition systems requiring on-chip programmable filtering, high SNR, and flexible interface options in industrial and automotive environments.
FAQ
What is the maximum input clock frequency supported by the AD7725BS-REEL?
The AD7725BS-REEL supports a maximum CLKIN frequency of 14.4 MHz when HALF_PWR is logic high. At this rate, it achieves its rated 900 kSPS output word rate with appropriate decimation. Operation above 9.6 MHz requires HALF_PWR = high to maintain analog performance; lowering HALF_PWR halves analog current but caps CLKIN at 9.6 MHz per datasheet Rev. A specifications.
Does the AD7725BS-REEL include an internal voltage reference?
Yes, the AD7725BS-REEL integrates a precision 2.5 V bandgap reference (REF2) with ±3 mV offset and 60 ppm/°C drift. REF2 can be used directly as the modulator reference, or bypassed in favor of an external reference applied to REF2 pin (1.2–3.15 V range). REF1 provides buffered access to the internal reference output for external circuitry.
How is the AD7725BS-REEL configured for different filter responses?
The AD7725BS-REEL is configured via downloadable configuration files loaded through its serial or parallel interface. These files - generated using Analog Devices' Filter Wizard software - define FIR/IIR coefficients, decimation ratio, and polynomial signal conditioning parameters. Configuration occurs at power-up (boot-from-EPROM) or runtime (DSP-hosted), enabling field-upgradable signal processing behavior without hardware changes.
Can multiple AD7725BS-REEL devices be synchronized for simultaneous sampling?
Yes, the AD7725BS-REEL includes a dedicated SYNC pin that resets the digital filter sequencer and postprocessor core. When driven synchronously across multiple units sharing the same CLKIN source, SYNC ensures aligned sampling instants and coherent output register updates - critical for phased-array radar or multi-channel sonar beamforming applications.
What package type and lead count does the AD7725BS-REEL use?
The AD7725BS-REEL is supplied in a 44-lead Metric Quad Flatpack (MQFP), package option S-44-2. This surface-mount package features gull-wing leads, a thermal pad (electrically isolated), and is rated for operation from –40°C to +85°C - matching the temperature range specified in the ordering row for AD7725BS-REEL.
AD7725BS-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 44-QFP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 900k
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI, Parallel
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 44-MQFP (10x10)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7725BS-REEL FAQ
1.How can I place an order for AD7725BS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7725BS-REEL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7725BS-REEL reliable?
The price and inventory of AD7725BS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7725BS-REEL is usually 5 days.
3.What payment methods are accepted for AD7725BS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7725BS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7725BS-REEL?
AD7725BS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7725BS-REEL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7725BS-REEL?
For technical support, including AD7725BS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7725BS-REEL requirements.
6.How does Aetrix verify that AD7725BS-REEL is sourced from the original manufacturer or authorized distributors?
All AD7725BS-REEL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7725BS-REEL meets industry standards.
7.What is the process for return or replacement of AD7725BS-REEL?
All AD7725BS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7725BS-REEL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7725BS-REEL part is unused and in its original packaging.
Return procedure for AD7725BS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7725BS-REEL Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
