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Analog Devices Inc. AD7264BSTZ-RL7
- Part No.:
- AD7264BSTZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-LQFP
- Datasheet:
-
AD7264BSTZ-RL7.pdf
- Description:
- IC ADC 14BIT SAR 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,004
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Product details
Overview
AD7264BSTZ-RL7 from Analog Devices is a dual-channel, 14-bit, 1 MSPS simultaneous-sampling SAR ADC with integrated PGA (×1 to ×128), four on-chip comparators, and internal 2.5 V reference. It operates from a single 5 V analog supply, supports true differential inputs, and targets high-precision sensor signal acquisition in motor control feedback loops.
For engineers reviewing the AD7264BSTZ-RL7 datasheet, AD7264BSTZ-RL7 pinout, AD7264BSTZ-RL7 application, or AD7264BSTZ-RL7 equivalent, this page delivers verified specifications, validated package mapping (48-lead LQFP), confirmed comparator timing behavior, calibrated DC accuracy metrics, and real-world motor encoder monitoring use cases - all traceable to Rev. E datasheet.
Technical Context
The AD7264BSTZ-RL7 integrates two independent SAR ADCs sharing a common clock domain, enabling true simultaneous sampling of VA± and VB± with matched acquisition timing. Each channel includes a programmable gain amplifier with 14 discrete gain settings and configurable offset/gain calibration registers.
Four dedicated comparators are partitioned into low-power (A/B) and fast-propagation (C/D) pairs, each with independent supply domains (CA_CBVCC/CC_CDVCC) and ground references (CA_CB_GND/CC_CD_GND). The device uses a 2.5 V internal reference with ±5 mV tolerance at 25°C and supports external reference via VREFA/VREFB pins when REFSEL = GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - guarantees monotonic output and no missing codes across full operating temperature range (−40°C to +105°C). |
| Throughput Rate | 1 MSPS per ADC - enables real-time capture of fast-changing position signals from analog encoders in servo drives. |
| PGA Gain Range | ×1 to ×128 in 14 steps - allows direct digitization of mV-level resolver or LVDT outputs without external amplification. |
| SNR | 78 dB typical at gain = 2 - supports >12.6 ENOB for precision current sensing in industrial inverters. |
| Input Impedance | >1 GΩ - minimizes loading error on high-impedance sensor sources like piezoelectric accelerometers. |
| Comparator Propagation Delay | 0.12 µs (C/D) / 0.93 µs (A/B) at 5 V - enables accurate zero-crossing detection for commutation timing in BLDC motors. |
| Reference Voltage | 2.5 V ±5 mV - stable internal reference eliminates need for external voltage reference IC in cost-sensitive designs. |
Pinout & Package
AD7264BSTZ-RL7 is packaged in a 48-lead LQFP (7 mm × 7 mm, 0.5 mm pitch) with exposed pad for thermal and noise performance. Pin functions are validated per Rev. E datasheet Figure 3 and Table 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VA+, VA− | Analog Input A | True differential input pair for first ADC channel; accepts ±VREF/2 at selected PGA gain with >1 GΩ input impedance. |
| VB+, VB− | Analog Input B | True differential input pair for second ADC channel; enables simultaneous sampling with VA± for phase-current monitoring. |
| DOUTA, DOUTB | Serial Data Outputs | Provide MSB-first, two's complement data streams for both ADCs; support SPI/QSPI/MICROWIRE interfaces up to 34 MHz SCLK. |
| COUTA–COUTD | Comparator Outputs | CMOS push-pull digital outputs referenced to VDRIVE; C/D variants deliver sub-0.13 µs propagation delay for critical timing paths. |
| G0–G3 | Gain Selection Inputs | Directly configure PGA gain (×1 to ×128); if all tied low, PD0/DIN becomes serial data input for register-based programming. |
| VREFA, VREFB | Reference I/O | Supply or sink reference current; decoupled with 1 µF capacitors; enable external reference injection when REFSEL = GND. |
| REFSEL | Reference Select | Logic-high selects internal 2.5 V reference; logic-low enables external reference routing to both ADCs. |
Key Features
| Feature | Design Value |
|---|---|
| Dual simultaneous sampling | Eliminates inter-channel skew in motor phase current measurement, preserving vector control fidelity at 1 MSPS. |
| Programmable gain amplifier | 14 gain options (×1–×128) allow single-component adaptation to diverse sensor outputs - e.g., ×32 for thermocouples, ×8 for strain gauges. |
| On-chip calibration | Internal offset calibration removes device-specific errors; system gain calibration compensates for front-end sensor/PGA drift over temperature. |
| Four integrated comparators | Two low-power (A/B) and two fast (C/D) comparators reduce BOM count in encoder interface circuits while supporting dual-edge detection. |
| Single 5 V supply operation | Reduces power rail complexity versus dual-supply ADCs; AVCC powers analog core, VDRIVE sets logic interface level (2.7–5.25 V). |
Applications
| Motor Position Feedback | Industrial Current Sensing |
|---|---|
Use Scenario: Digitizing analog sine/cosine outputs from resolvers or analog encoders in servo motor drives. IC Role / Device Role / Timing Role: Simultaneous sampling ADC with PGA gain ×8–×32 and internal 2.5 V reference provides synchronized, high-SNR position data for field-oriented control. Use Value: Eliminates external op-amps and reference ICs; 1 MSPS throughput captures 20 kHz electrical cycles with >12 ENOB. |
Use Scenario: Measuring phase currents in three-phase inverters using shunt resistors or current transformers. IC Role / Device Role / Timing Role: Dual ADC channels sample IA and IB simultaneously; PGA gain ×16–×64 conditions millivolt-level shunt voltages before conversion. Use Value: Matched gain/offset specs (±0.061% FSR full-scale error match) ensure precise current vector reconstruction for torque ripple reduction. |
| Condition Monitoring Sensor Hub | High-Accuracy Data Acquisition |
Use Scenario: Aggregating vibration, temperature, and pressure signals from multiple industrial sensors onto a single acquisition node. IC Role / Device Role / Timing Role: Four comparators monitor threshold crossings (e.g., bearing fault frequencies), while dual ADCs log time-stamped amplitude data. Use Value: Integrated comparators replace discrete voltage detectors; 1 GΩ input impedance prevents sensor loading on piezoelectric accelerometers. |
Use Scenario: Precision test equipment requiring low-noise, high-linearity digitization of low-amplitude signals (e.g., strain gauge bridges). IC Role / Device Role / Timing Role: PGA gain ×128 amplifies µV-level bridge outputs; 78 dB SNR and ±1.5 LSB INL meet Class I DAQ accuracy requirements. Use Value: On-chip system gain calibration compensates for sensor nonlinearity and PCB trace resistance, reducing post-processing overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7262BCPZ-RL7 | 12-bit resolution, same 1 MSPS rate, identical 48-lead LFCSP package, but lacks comparators and has lower SNR (73 dB). | Suitable for cost-sensitive motor control where 12-bit resolution suffices; cannot replace AD7264BSTZ-RL7 in applications requiring comparator-based zero-crossing detection. | Select when BOM cost reduction is prioritized over resolution and comparator integration. |
| ADS8684IPWR | 16-bit resolution, 500 kSPS, integrated PGA (×1–×12), but no on-chip comparators and requires separate reference IC. | Better resolution for precision instrumentation; slower throughput limits use in high-bandwidth motor control; external reference increases layout complexity. | Select when higher ENOB (>14.5) is mandatory and 500 kSPS meets system timing requirements. |
Compared with AD7264BSTZ-RL7, AD7262BCPZ-RL7 trades 2 bits of resolution and comparator functionality for lower cost and power, while ADS8684IPWR offers superior linearity at half the speed and without integrated comparators - making AD7264BSTZ-RL7 uniquely balanced for simultaneous high-speed, high-accuracy, and feature-rich motor feedback systems.
Availability
AD7264BSTZ-RL7 is available at Aetrix Electronics and suitable for motor control systems, industrial current sensing modules, and condition monitoring sensor hubs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AD7264BSTZ-RL7 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 AD7264 product line was designed specifically for high-fidelity, simultaneous multi-channel data acquisition in demanding industrial motion control and real-time monitoring applications.
FAQ
What is the maximum guaranteed throughput rate for AD7264BSTZ-RL7?
The AD7264BSTZ-RL7 guarantees 1 MSPS throughput per ADC channel under all operating conditions (−40°C to +105°C, AVCC = 4.75 V to 5.25 V). This is achieved using a minimum 33-cycle serial interface frame with SCLK up to 34 MHz, and is explicitly specified in Table 1 of Rev. E datasheet.
Does AD7264BSTZ-RL7 support true differential analog inputs?
Yes, AD7264BSTZ-RL7 supports true differential analog inputs on both channels: VA+ and VA− form a differential pair for ADC A, and VB+ and VB− form a differential pair for ADC B. Each pair features >1 GΩ input impedance and common-mode rejection optimized across PGA gain settings.
How many gain settings does the integrated PGA in AD7264BSTZ-RL7 provide?
The AD7264BSTZ-RL7 includes a programmable gain amplifier with 14 discrete gain settings: ×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, and ×128. These are selected via hardware pins G0–G3 or through the control register when PD0/DIN is enabled.
Can AD7264BSTZ-RL7 operate with an external reference voltage?
Yes, AD7264BSTZ-RL7 supports external reference operation. When REFSEL is tied to GND, the internal 2.5 V reference is disabled and external reference voltages can be applied to VREFA and/or VREFB pins. The device accepts 2.5 V reference inputs with ±1 µA leakage current and 20 pF input capacitance.
What are the key differences between the four comparators in AD7264BSTZ-RL7?
AD7264BSTZ-RL7 integrates two comparator pairs: Comparators A and B are optimized for ultra-low power (3–8.5 µA at 3.3 V), while Comparators C and D prioritize speed (0.12–0.13 µs propagation delay at 5 V). All four have independent supplies (CA_CBVCC/CC_CDVCC) and ground references (CA_CB_GND/CC_CD_GND).
AD7264BSTZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- SPI, DSP
- Configuration:
- PGA-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- PGA, Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 48-LQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7264BSTZ-RL7 FAQ
1.How can I place an order for AD7264BSTZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7264BSTZ-RL7 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 AD7264BSTZ-RL7 reliable?
The price and inventory of AD7264BSTZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7264BSTZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD7264BSTZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7264BSTZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7264BSTZ-RL7?
AD7264BSTZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7264BSTZ-RL7 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 AD7264BSTZ-RL7?
For technical support, including AD7264BSTZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7264BSTZ-RL7 requirements.
6.How does Aetrix verify that AD7264BSTZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7264BSTZ-RL7 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 AD7264BSTZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD7264BSTZ-RL7?
All AD7264BSTZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7264BSTZ-RL7, 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 AD7264BSTZ-RL7 part is unused and in its original packaging.
Return procedure for AD7264BSTZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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