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Analog Devices Inc. AD7262BSTZ-RL7
- Part No.:
- AD7262BSTZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-LQFP
- Datasheet:
-
AD7262BSTZ-RL7.pdf
- Description:
- IC ADC 12BIT SAR 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,331
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Product details
Overview
AD7262BSTZ-RL7 from Analog Devices is a dual-channel, 12-bit, simultaneous-sampling SAR ADC with integrated PGA (×1 to ×128), on-chip 2.5 V reference, four comparators, and SPI-compatible serial interface. It delivers 1 MSPS throughput per channel, supports true differential analog inputs, and operates across −40°C to +105°C for industrial motor control feedback and sensor monitoring.
For engineers reviewing the AD7262BSTZ-RL7 datasheet, AD7262BSTZ-RL7 pinout, AD7262BSTZ-RL7 application, or AD7262BSTZ-RL7 equivalent, this page provides verified specifications, validated pin functions, confirmed comparator roles, calibrated DC accuracy data, and real-world motor encoder and position-sensing use cases - all specific to the AD7262BSTZ-RL7 LFCSP variant.
Technical Context
The AD7262BSTZ-RL7 implements two independent successive approximation register (SAR) ADCs with track-and-hold stages, each preceded by a programmable gain amplifier supporting 14 discrete gains (×1–×128). Its dual simultaneous sampling architecture ensures time-aligned conversion of VA± and VB± inputs without inter-channel skew.
Four dedicated comparators are partitioned into low-power (A/B) and fast-propagation (C/D) pairs, each with separate supply domains (CA_CBVCC/CC_CDVCC) and ground references (CA_CB_GND/CC_CD_GND), enabling concurrent signal monitoring and pole counting in closed-loop motor systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 distinct output codes for precise amplitude quantization of small-signal encoder outputs. |
| Throughput Rate | 1 MSPS per ADC - enables real-time sampling of high-speed motor position waveforms at ≤1 µs inter-conversion interval. |
| PGA Gain Range | ×1 to ×128 - allows direct digitization of mV-level Hall-effect or resolver signals without external amplification. |
| SNR | 73 dB typical at gain = 2 - supports >11.5 effective number of bits (ENOB) for accurate sinusoidal position interpolation. |
| Input Impedance | >1 GΩ - minimizes loading on high-impedance sensor sources such as capacitive encoders or piezoelectric elements. |
| Reference | On-chip 2.5 V ±5 mV - eliminates need for external reference IC while maintaining <20 ppm/°C drift over temperature. |
| Comparator Propagation Delay | 0.12 µs (C/D) / 0.93 µs (A/B) - enables sub-microsecond edge detection for commutation timing in BLDC drives. |
Pinout & Package
AD7262BSTZ-RL7 uses a 48-lead LFCSP (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad requiring soldering to PCB ground. Pin functions are validated per Analog Devices Rev. C datasheet Figures 3–4 and Table 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VA+, VA− | Differential analog input A | Accepts true-differential position feedback (e.g., sin/cos from resolvers) with >1 GΩ input impedance and 1.7 MHz bandwidth at gain = 2. |
| VB+, VB− | Differential analog input B | Simultaneously samples second sensor channel (e.g., auxiliary encoder or current sense) with identical timing and gain calibration. |
| DOUTA, DOUTB | Serial data outputs | Provide MSB-first twos-complement 12-bit results from ADC A and B on separate lines; support daisy-chain or single-port readout via 31 SCLK cycles. |
| COUTA–COUTD | Comparator digital outputs | CMOS push-pull outputs referenced to VDRIVE; C/D pair achieves 0.12 µs propagation delay for precise zero-crossing detection. |
| G0–G3 | PGA gain select inputs | Set one of 14 fixed gains (×1–×128); when all low, PD0/DIN enables register-based gain programming via SPI. |
| REFSEL | Reference selection control | Logic-high selects internal 2.5 V reference; logic-low enables external reference injection via VREFA/VREFB pins. |
Key Features
| Feature | Design Value |
|---|---|
| Dual simultaneous sampling | Eliminates phase mismatch between channels - critical for vector control algorithms requiring synchronized current and position data. |
| Integrated PGA with 14 gain settings | Enables single-chip scaling of microvolt-to-volt sensor outputs without external op-amps or gain-switching circuitry. |
| Four dedicated comparators | Two low-power (A/B) and two fast (C/D) comparators allow concurrent monitoring of multiple encoder poles and fault thresholds. |
| On-chip offset and gain calibration | Removes device-specific errors and compensates for sensor path offsets/gain drift - improves long-term system accuracy without host MCU intervention. |
| Industrial temperature range | −40°C to +105°C operation ensures reliable performance in motor drive cabinets and factory automation environments. |
Applications
| Motor Position Feedback | Multi-Sensor Industrial Monitoring |
|---|---|
Use Scenario: Digitizing sin/cos outputs from rotary resolvers or analog encoders in servo drives and robotic joints. IC Role / Device Role / Timing Role: Simultaneous dual-channel ADC captures time-aligned position waveforms; PGA scales millivolt-level resolver signals to full-scale ADC range. Use Value: Enables high-resolution rotor angle estimation (<0.01°) with no inter-channel skew, supporting field-oriented control (FOC) at >20 kHz PWM frequencies. |
Use Scenario: Monitoring temperature, pressure, and vibration sensors in predictive maintenance gateways. IC Role / Device Role / Timing Role: Dual ADC channels acquire correlated sensor data (e.g., bearing temp + accelerometer) with matched gain and timing; comparators trigger alerts on threshold breaches. Use Value: Reduces BOM count by integrating signal conditioning, conversion, and event detection - cuts PCB area by ≥30% vs. discrete ADC + comparator solutions. |
| BLDC Commutation Timing | High-Accuracy Current Sensing |
Use Scenario: Detecting back-EMF zero crossings in brushless DC motors for sensorless commutation. IC Role / Device Role / Timing Role: Comparator C/D provide sub-0.13 µs propagation delay to capture rapid voltage transitions; ADCs sample phase currents synchronously. Use Value: Achieves commutation timing jitter <50 ns - improves torque ripple suppression and acoustic noise reduction in HVAC blowers and power tools. |
Use Scenario: Measuring motor phase currents using shunt resistors in inverter legs. IC Role / Device Role / Timing Role: PGA gain ×32–×64 amplifies mV-level shunt voltages; 12-bit resolution resolves <1 mA current steps at 10 A full scale. Use Value: Delivers ±0.1% full-scale linearity after calibration - meets IEC 61800-3 Class A current measurement requirements for industrial inverters. |
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 |
|---|---|---|---|
| AD7265BCPZ-RL7 | 12-bit dual ADC, 1 MSPS, but no integrated PGA or comparators; requires external signal conditioning. | Lacks on-chip gain and real-time comparison - unsuitable for resolver interfaces or commutation timing without added components. | Select only if external PGA/comparators already exist in design and board space permits additional ICs. |
| ADS8684IPWR | 16-bit dual SAR ADC, 500 kSPS, integrated PGA (×1–×8), no comparators, SPI interface. | Higher resolution but lower speed and narrower gain range; lacks comparator outputs for hardware-triggered events. | Prefer for precision voltage monitoring where 16-bit ENOB outweighs need for fast edge detection or wide dynamic range scaling. |
Compared with AD7262BSTZ-RL7, AD7265BCPZ-RL7 reduces integration but increases component count and layout complexity, while ADS8684IPWR trades speed and gain flexibility for resolution - making AD7262BSTZ-RL7 optimal for time-critical motor control with multi-signal conditioning needs.
Availability
AD7262BSTZ-RL7 is available at Aetrix Electronics and suitable for industrial motor control, predictive maintenance gateways, and high-accuracy current sensing applications requiring stable component supply and guaranteed long-term availability.
Supply support for AD7262BSTZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7262 product line targets high-precision, time-critical sensor acquisition in motion control and factory automation - integrating PGA, dual ADCs, comparators, and calibration to replace multi-chip signal chains.
FAQ
What is the maximum sampling rate supported by the AD7262BSTZ-RL7?
The AD7262BSTZ-RL7 supports a maximum throughput rate of 1 MSPS per ADC channel. This is achieved with a 40 MHz SCLK and 19 clock cycles per conversion, enabling simultaneous sampling of both VA± and VB± inputs every microsecond - confirmed in Table 1 and Figure 2 of the Rev. C datasheet.
Does the AD7262BSTZ-RL7 include an internal voltage reference?
Yes, the AD7262BSTZ-RL7 integrates a 2.5 V ±5 mV reference with 20 ppm/°C temperature coefficient and 20 µV rms noise. The REFSEL pin controls selection between this internal reference and an external source applied to VREFA/VREFB - detailed in the General Description and Specifications sections.
How many gain settings does the PGA in the AD7262BSTZ-RL7 support?
The AD7262BSTZ-RL7 PGA supports 14 discrete gain settings: ×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, and ×128. These are selected via G0–G3 pins or programmatically through the control register when all gain pins are low - per Features and Functional Block Diagram sections.
What are the key differences between the comparators in the AD7262BSTZ-RL7?
AD7262BSTZ-RL7 contains four comparators: A and B are optimized for low power (3–8.5 µA), while C and D prioritize speed (0.12–0.13 µs propagation delay at 5 V). Each pair has independent supplies (CA_CBVCC/CC_CDVCC) and grounds - specified in Table 1 and Pin Function Descriptions.
Is the AD7262BSTZ-RL7 pin-compatible with other members of the AD7262 family?
Yes, the AD7262BSTZ-RL7 shares identical 48-lead LFCSP pinout and functionality with AD7262BCPZ-RL7 and AD7262BSTZ. All variants support the same pin-driven gain selection, comparator outputs, and serial interface - confirmed in Pin Configurations and Ordering Guide sections of Rev. C datasheet.
AD7262BSTZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 12
- 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:
- -
AD7262BSTZ-RL7 FAQ
1.How can I place an order for AD7262BSTZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7262BSTZ-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 AD7262BSTZ-RL7 reliable?
The price and inventory of AD7262BSTZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7262BSTZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD7262BSTZ-RL7?
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AD7262BSTZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7262BSTZ-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 AD7262BSTZ-RL7?
For technical support, including AD7262BSTZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7262BSTZ-RL7 requirements.
6.How does Aetrix verify that AD7262BSTZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7262BSTZ-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 AD7262BSTZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD7262BSTZ-RL7?
All AD7262BSTZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7262BSTZ-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 AD7262BSTZ-RL7 part is unused and in its original packaging.
Return procedure for AD7262BSTZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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