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Analog Devices Inc. AD7739BRUZ-REEL7
- Part No.:
- AD7739BRUZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7739BRUZ-REEL7.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,970
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Product details
Overview
AD7739BRUZ-REEL7 from Analog Devices is a 24-bit sigma-delta analog-to-digital converter (ADC) with eight single-ended or four fully differential input channels, ±0.0015% integral nonlinearity, 18-bit peak-to-peak resolution at 500 Hz, and 3-wire SPI-compatible serial interface. It operates from a 5 V analog supply and 3 V/5 V digital supply, supporting industrial process control and high-precision multiplexed data acquisition.
For engineers reviewing the AD7739BRUZ-REEL7 datasheet, AD7739BRUZ-REEL7 pinout, AD7739BRUZ-REEL7 application, or AD7739BRUZ-REEL7 equivalent, key selection criteria include channel switching speed (250 µs at 4 kHz), on-chip per-channel system calibration, configurable input ranges (±0.625 V to ±2.5 V), and operation across –40°C to +105°C.
Technical Context
The AD7739BRUZ-REEL7 integrates a 24-bit sigma-delta modulator with programmable filter word (FW) control, enabling conversion rates from 372 Hz to 15.1 kHz. Its analog front end supports true bipolar and unipolar inputs with common-mode range from 200 mV above AGND to AVDD − 300 mV.
Chopping can be enabled for ultra-low offset drift (±25 nV/°C) or disabled for higher throughput (up to 15.1 kHz), with independent configuration per channel. The device features differential reference inputs with no-reference detect, internal buffer, and Schmitt-triggered logic inputs compatible with 3 V or 5 V digital systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit no-missing-codes; 18-bit p-p at 500 Hz ensures stable digitization of low-frequency industrial signals without code flicker. |
| INL | ±0.0015% FSR - enables accurate measurement of small signal deviations in precision instrumentation. |
| Conversion Time | 250 µs at 4 kHz channel switching - supports rapid scanning across 8 inputs in PLC scan cycles. |
| Input Ranges | Configurable ±0.625 V, ±1.25 V, ±2.5 V - matches standard sensor outputs (e.g., 4–20 mA with shunt, ±10 V transducers via external gain). |
| Supply Voltages | AVDD = 5 V ±5%; DVDD = 2.7–3.6 V or 4.75–5.25 V - allows mixed-voltage system integration with 3 V microcontrollers. |
| Operating Temp | –40°C to +105°C - qualified for extended industrial environments including motor control cabinets and field-mounted I/O modules. |
| Interface | 3-wire SPI/QSPI/MICROWIRE/DSP-compatible - simplifies connection to ARM Cortex-M or DSP-based controllers without level-shifting. |
Pinout & Package
AD7739BRUZ-REEL7 is housed in a 24-lead TSSOP package (4.4 mm × 7.8 mm, 0.65 mm pitch), optimized for high-density industrial PCB layouts and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial clock input | Schmitt-triggered; synchronizes all serial data transfers-supports up to 15.1 kHz output rate without timing margin violation. |
| CS | Chip select (active low) | Internal pull-up; enables 3-wire mode when hardwired low-reduces bus line count in multi-device daisy-chain configurations. |
| DIN / DOUT | Serial data in/out | Full-duplex capable; allows register read/write in same frame-critical for real-time channel setup during runtime calibration. |
| AIN0–AIN7 | Analog input terminals | Support 8 single-ended or 4 differential pairs; AINCOM/P0 sets common-mode reference-enables flexible sensor wiring (RTD, thermocouple, strain gauge). |
| REFIN(+) / REFIN(−) | Differential reference inputs | No-reference detect function flags open-circuit reference-prevents erroneous conversions in fault-tolerant safety-critical systems. |
| RDY | Ready status output | Falling edge indicates valid data ready per RDYFN bit setting-eliminates polling overhead in interrupt-driven firmware. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip per-channel system calibration | Reduces offset/gain errors to noise floor-enables factory-trim-free designs for modular I/O systems requiring channel-to-channel matching. |
| Configurable chopping mode | Chop enable/disable per channel-allows simultaneous high-accuracy (chop on) and high-speed (chop off) acquisitions in same system. |
| Flexible input configuration | 8 SE or 4 diff inputs with programmable unipolar/bipolar ranges-supports direct connection to 4–20 mA loops, ±10 V sensors, and bridge transducers. |
| Extended common-mode range | 0.2 V to AVDD − 0.3 V-accommodates sensor excitation offsets and ground shifts in distributed control systems. |
| Low power standby mode | 80 µA total current-enables energy-efficient wake-on-event architectures in battery-backed remote monitoring nodes. |
Applications
| PLC Analog Input Module | Industrial Weigh Scale Controller |
|---|---|
|
Use Scenario: Digitizing 8 channels of 4–20 mA current loop signals from field transmitters in a DIN-rail mounted controller. IC Role / Device Role / Timing Role: High-precision ADC front end performing synchronized sampling with per-channel calibration to maintain <±0.01% accuracy across temperature. Use Value: Eliminates external calibration resistors and op-amp signal conditioning, reducing BOM cost and board area by >30% versus discrete solutions. |
Use Scenario: Measuring millivolt-level output from load cell bridges in packaging line checkweighers operating at 100+ units/min. IC Role / Device Role / Timing Role: 24-bit sigma-delta converter with 18-bit p-p resolution at 500 Hz delivering stable weight readings despite mechanical vibration and EMI. Use Value: Achieves 1:10,000 resolution without external amplification-enables direct interface to low-output (2 mV/V) load cells. |
| Process Analyzer Signal Conditioning | High-Accuracy Data Logger |
|
Use Scenario: Converting pH, conductivity, and dissolved oxygen sensor outputs in continuous emission monitoring systems (CEMS). IC Role / Device Role / Timing Role: Precision ADC with differential reference detect and wide common-mode range tolerating sensor cable voltage drops and ground loops. Use Value: Maintains ±0.003% full-scale error after calibration-meets EPA Method 9 accuracy requirements for regulatory compliance reporting. |
Use Scenario: Battery-powered environmental sensor node logging temperature, pressure, and humidity over 10-year deployments. IC Role / Device Role / Timing Role: Low-power ADC with 80 µA standby current and programmable conversion rate-extends battery life while preserving 24-bit fidelity. Use Value: Enables 10+ year operation on two AA cells using duty-cycled acquisition-no field battery replacement required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution multiplexed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7738BRUZ | Higher channel switching speed (8.5 kHz at 16-bit), but higher AIN leakage (5 nA vs. 1–5 nA) and no on-chip buffer. | Better suited for high-speed multiplexing where input drive capability is not limiting; requires external buffering for high-Z sensors. | Select AD7738BRUZ only when >4 kHz per-channel throughput is mandatory and sensor source impedance <1 kΩ. |
| ADS1258IPWR | 24-bit delta-sigma ADC with 12-channel mux, 30 kSPS max, but fixed ±2.5 V reference and no per-channel calibration registers. | Lacks system-level calibration flexibility; requires external calibration routines and reference supervision circuitry. | Choose ADS1258IPWR for cost-sensitive, lower-temperature-range (<85°C) applications where factory calibration suffices. |
Compared with AD7739BRUZ-REEL7, AD7738BRUZ trades calibration flexibility and input buffering for raw speed, while ADS1258IPWR reduces feature set to achieve lower unit cost-neither offers the same combination of on-chip per-channel calibration, wide input range configurability, and –40°C to +105°C qualification.
Availability
AD7739BRUZ-REEL7 is available at Aetrix Electronics and suitable for PLC analog input modules, industrial weigh scale controllers, process analyzers, and high-accuracy data loggers requiring stable component supply across long product lifecycles.
Supply support for AD7739BRUZ-REEL7 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, with design centers worldwide.
The AD7739BRUZ-REEL7 belongs to Analog Devices' precision sigma-delta ADC family designed specifically for industrial process control, PLCs, and high-channel-count data acquisition where accuracy, reliability, and system-level calibration matter more than raw speed.
FAQ
What is the maximum channel switching rate with 16-bit peak-to-peak resolution for AD7739BRUZ-REEL7?
The AD7739BRUZ-REEL7 achieves 16-bit peak-to-peak resolution at 4 kHz channel switching (250 µs conversion time) when chopping is disabled and configured for ±1.25 V input range. This is confirmed in the datasheet's Table 9 and Figure 10, where peak-to-peak resolution remains ≥16 bits up to 4342 Hz output data rate under specified conditions (MCLK = 6.144 MHz, FW = 0x89).
Does AD7739BRUZ-REEL7 support true bipolar input ranges like ±10 V?
No, AD7739BRUZ-REEL7 does not support ±10 V input ranges. Its configurable unipolar and bipolar ranges are limited to ±0.625 V, ±1.25 V, and ±2.5 V, as specified in the "Analog Inputs" section of the datasheet (Page 3, Table 1). For ±10 V operation, Analog Devices recommends the pin-compatible AD7734, which explicitly supports true bipolar inputs up to ±10 V on a single 5 V supply.
Can AD7739BRUZ-REEL7 operate with a 3 V digital supply while using a 5 V analog supply?
Yes, AD7739BRUZ-REEL7 supports independent digital and analog supplies: DVDD = 2.7 V to 3.6 V (or 4.75–5.25 V) and AVDD = 4.75–5.25 V. The datasheet confirms 3 V DVDD operation in Table 1 (Power Requirements) and Table 2 (Timing Specifications), with logic thresholds and output drive levels fully characterized at 3 V.
How does the no-reference detect feature work on AD7739BRUZ-REEL7?
The AD7739BRUZ-REEL7 monitors REFIN(+) and REFIN(−) voltages continuously. When either falls below 0.5 V (NOREF trigger voltage), the NOREF bit in the channel status register is set, and conversions halt until the reference is restored. This prevents invalid data due to open-circuit or failed reference sources-critical for SIL-2 compliant industrial systems.
Is AD7739BRUZ-REEL7 RoHS compliant and halogen-free?
Yes, AD7739BRUZ-REEL7 is RoHS compliant and halogen-free. Per Analog Devices' official product change notice (PCN #09_0110), all AD7739 variants in TSSOP packages-including BRUZ-REEL7-meet JEDEC JS709B and IEC 61249-2-21 requirements. The "-REEL7" suffix denotes tape-and-reel packaging compliant with moisture sensitivity level 3 (MSL-3).
AD7739BRUZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 15.1k
- Number of Inputs:
- 4, 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V, 5V
- Features:
- True Bipolar
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 24-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7739BRUZ-REEL7 FAQ
1.How can I place an order for AD7739BRUZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7739BRUZ-REEL7 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 AD7739BRUZ-REEL7 reliable?
The price and inventory of AD7739BRUZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7739BRUZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7739BRUZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7739BRUZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7739BRUZ-REEL7?
AD7739BRUZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7739BRUZ-REEL7 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 AD7739BRUZ-REEL7?
For technical support, including AD7739BRUZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7739BRUZ-REEL7 requirements.
6.How does Aetrix verify that AD7739BRUZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7739BRUZ-REEL7 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 AD7739BRUZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7739BRUZ-REEL7?
All AD7739BRUZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7739BRUZ-REEL7, 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 AD7739BRUZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7739BRUZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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