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Analog Devices Inc. AD7264BSTZ-5
- Part No.:
- AD7264BSTZ-5
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-LQFP
- Datasheet:
-
AD7264BSTZ-5.pdf
- Description:
- IC ADC 14BIT SAR 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,438
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Product details
Overview
AD7264BSTZ-5 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 supply, supports true differential analog inputs, and targets precision sensor signal acquisition in motor control feedback loops.
For engineers reviewing the AD7264BSTZ-5 datasheet, AD7264BSTZ-5 pinout, AD7264BSTZ-5 application, or AD7264BSTZ-5 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-5 integrates two independent SAR ADCs sharing a common clock domain, enabling true simultaneous sampling of VA± and VB± inputs with matched acquisition timing. Each channel features 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. 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 scale |
| Throughput Rate | 1 MSPS per ADC - enables real-time capture of 500 kHz Nyquist-bandwidth signals |
| PGA Gain Range | ×1 to ×128 in 14 steps - supports direct interface to mV-level encoder or current-sense signals |
| SNR | 78 dB typical at gain = 2 - delivers >12.6 ENOB for high-fidelity position feedback digitization |
| Input Impedance | >1 GΩ - minimizes loading on high-impedance sensor sources without external buffering |
| Comparator Propagation Delay | 0.12 µs (C/D) / 0.93 µs (A/B) at 5 V - enables precise edge detection for pole counting in BLDC commutation |
| Reference Voltage | 2.5 V ±5 mV - stable internal reference eliminates need for external precision voltage source |
Pinout & Package
AD7264BSTZ-5 is packaged in a 48-lead LQFP (7 mm × 7 mm, 0.5 mm pitch) with exposed pad grounded for thermal and noise performance. Pin functions are fully defined per Rev. E datasheet Figure 3 and Table 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VA+, VA− | Differential analog input A | True differential front-end for first ADC channel; supports common-mode range up to AVCC/2 ±0.4 V at gain ≥2 |
| VB+, VB− | Differential analog input B | Independent differential input for second ADC; enables simultaneous sampling with channel-to-channel isolation >90 dB |
| DOUTA, DOUTB | Serial data outputs | Simultaneous MSB-first twos-complement outputs; support SPI/QSPI/MICROWIRE interfaces with 33-SCLK conversion cycle |
| COUTA–COUTD | Comparator digital outputs | CMOS push-pull outputs referenced to VDRIVE; A/B optimized for <6 µA quiescent current, C/D for <0.32 µs propagation |
| G0–G3 | PGA gain select inputs | Direct hardware gain programming (e.g., G3G2G1G0 = 0010 → ×3); alternative control via PD0/DIN register write |
| VREFA, VREFB | Reference input/output | Buffered 2.5 V reference taps; accept external reference when REFSEL = GND; require 1 µF decoupling per pin |
| CS, SCLK, CAL | Control logic inputs | CS active-low initiates conversion; SCLK clocks data and drives internal conversion timing; CAL triggers offset calibration sequence |
Key Features
| Feature | Design Value |
|---|---|
| Dual simultaneous sampling | Enables time-aligned capture of position and current feedback in servo drives without inter-channel skew |
| Programmable gain amplifier | 14 gain options eliminate external op-amp stages for scaling thermocouple, RTD, or shunt-based signals |
| Four integrated comparators | Two low-power + two fast comparators allow concurrent overcurrent detection and commutation timing in one IC |
| On-chip 2.5 V reference | Reduces BOM count and layout area; ±20 ppm/°C drift ensures stable full-scale definition across −40°C to +105°C |
| Calibration capability | Factory-trimmed offset and user-programmable gain adjust registers compensate for sensor/PCB path errors |
Applications
| Motor Position Feedback Monitoring | Multi-Axis Current Sensing |
|---|---|
Use Scenario: Real-time digitization of sine/cosine outputs from resolvers or analog encoders in industrial servo drives. IC Role / Device Role / Timing Role: Simultaneous sampling ADC captures VA± and VB± encoder signals with matched aperture timing to preserve phase relationship. Use Value: 1 MSPS throughput resolves 12-bit+ position data within 1 µs, enabling 100 kHz closed-loop bandwidth in field-oriented control. |
Use Scenario: High-speed acquisition of phase currents using shunt resistors in three-phase inverter legs. IC Role / Device Role / Timing Role: Dual ADC channels sample IA and IB simultaneously while PGA gain ×8 scales 50 mV shunt drops to full-scale range. Use Value: >1 GΩ input impedance prevents current measurement error from shunt resistor parallel leakage paths. |
| Pole Counting in BLDC Commutation | Condition Monitoring of Analog Sensors |
Use Scenario: Edge-triggered counting of Hall-effect or back-EMF zero-crossings for six-step commutation. IC Role / Device Role / Timing Role: Comparator C/D detect rising/falling edges on CA±/CB± with 0.12 µs propagation delay at 5 V supply. Use Value: Sub-microsecond timing resolution allows accurate rotor position estimation at 30,000 RPM (500 Hz electrical). |
Use Scenario: Low-drift digitization of temperature, pressure, or strain gauge bridges in harsh industrial environments. IC Role / Device Role / Timing Role: PGA gain ×32 amplifies µV-level bridge outputs; internal offset calibration removes thermal drift in signal chain. Use Value: 72 dB SNR at gain = 32 preserves dynamic range for detecting <0.01% full-scale changes in mechanical stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel SAR ADC with PGA applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7262BCPZ-5 | 12-bit resolution, same 1 MSPS rate, identical 48-lead LFCSP package but no comparators | Lacks integrated comparators; requires external logic for overcurrent detection | Select when lower cost and smaller PCB footprint outweigh need for on-chip comparators |
| ADS8684IPWR | 16-bit resolution, 500 kSPS, integrated reference, SPI interface only - no PGA or comparators | No programmable gain; higher resolution but half the throughput; no comparator functionality | Choose for ultra-precision voltage measurements where gain flexibility and real-time edge detection are not required |
Compared with AD7264BSTZ-5, AD7262BCPZ-5 reduces resolution by 2 bits but matches speed and package; ADS8684IPWR trades throughput and analog front-end integration for higher resolution and simpler interface - neither offers the combined PGA+comparator+simultaneous-sampling capability of AD7264BSTZ-5.
Availability
AD7264BSTZ-5 is available at Aetrix Electronics and suitable for motor control systems, industrial automation equipment, and precision test instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.
Supply support for AD7264BSTZ-5 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-accuracy, multi-channel data acquisition in motion control and industrial sensing applications - integrating PGA, comparators, and simultaneous sampling to replace discrete signal-chain components.
FAQ
What is the maximum guaranteed throughput rate of the AD7264BSTZ-5?
The AD7264BSTZ-5 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 34 MHz SCLK with 33 clock cycles per conversion, including acquisition and serial readout. Performance remains stable across the full industrial temperature range without derating.
Does the AD7264BSTZ-5 support external reference operation?
Yes, the AD7264BSTZ-5 supports external reference operation via the VREFA and VREFB pins. When REFSEL is tied to GND, the internal 2.5 V reference is disabled and the device accepts an external reference voltage applied to either or both reference pins. The reference input impedance is 1 GΩ, and input capacitance is 20 pF per pin.
How many gain settings does the PGA in the AD7264BSTZ-5 provide?
The AD7264BSTZ-5 provides 14 discrete PGA gain settings: ×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, and ×128. These are selected either by hardware via G0–G3 pins or through software writes to the gain adjust register when PD0/DIN is enabled as a serial data input.
What is the function of the CAL pin on the AD7264BSTZ-5?
The CAL pin on the AD7264BSTZ-5 initiates an internal offset calibration sequence that corrects device-specific input offset errors in both ADC channels. A minimum 2 µs high pulse on CAL triggers automatic calibration; results are stored in internal registers and applied transparently during subsequent conversions without interrupting normal operation.
Which package type does the AD7264BSTZ-5 use?
The AD7264BSTZ-5 uses a 48-lead LQFP package (7 mm × 7 mm, 0.5 mm pitch) with exposed pad. This package is distinct from the LFCSP variant (AD7264BCPZ-5) and is specified in the ordering guide as "BSTZ" suffix. Pinout matches Figure 3 in Rev. E datasheet, and thermal resistance is θJA = 55°C/W.
AD7264BSTZ-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 500k
- 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-5 FAQ
1.How can I place an order for AD7264BSTZ-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7264BSTZ-5 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-5 reliable?
The price and inventory of AD7264BSTZ-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7264BSTZ-5 is usually 5 days.
3.What payment methods are accepted for AD7264BSTZ-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7264BSTZ-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7264BSTZ-5?
AD7264BSTZ-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7264BSTZ-5 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-5?
For technical support, including AD7264BSTZ-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7264BSTZ-5 requirements.
6.How does Aetrix verify that AD7264BSTZ-5 is sourced from the original manufacturer or authorized distributors?
All AD7264BSTZ-5 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-5 meets industry standards.
7.What is the process for return or replacement of AD7264BSTZ-5?
All AD7264BSTZ-5 units undergo pre-shipment inspection (PSI). If there is an issue with AD7264BSTZ-5, 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-5 part is unused and in its original packaging.
Return procedure for AD7264BSTZ-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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