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Analog Devices Inc. AD7650ASTZRL
- Part No.:
- AD7650ASTZRL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-LQFP
- Datasheet:
-
AD7650ASTZRL.pdf
- Description:
- IC ADC 16BIT SAR 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,426
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Product details
Overview
AD7650ASTZRL from Analog Devices is a 16-bit, 570 kSPS charge redistribution SAR analog-to-digital converter operating from a single 5 V supply. It delivers no pipeline delay, supports 0 V to 2.5 V unipolar analog input range, and provides both parallel and SPI/QSPI/MICROWIRE-compatible serial interfaces. It is used in high-accuracy data acquisition systems requiring fast sampling without latency.
For engineers reviewing the AD7650ASTZRL datasheet, AD7650ASTZRL pinout, AD7650ASTZRL application, or AD7650ASTZRL equivalent, key selection criteria include Warp/Normal/Impulse mode throughput trade-offs, 48-lead LQFP package compatibility, 16-bit INL ±6 LSB accuracy, and dual-interface flexibility for embedded instrumentation and battery-powered signal chains.
Technical Context
The AD7650ASTZRL implements a capacitive charge redistribution DAC architecture with internal calibration logic, enabling true 16-bit resolution without missing codes across –40°C to +85°C. Its conversion core uses a differential input stage referenced to REFGND and supports external 2.5 V reference voltage with 115 µA typical current draw at full throughput.
Three selectable operating modes-Warp (570 kSPS, 1.75 µs cycle, requires ≤1 ms inter-conversion interval), Normal (500 kSPS, no timing constraint), and Impulse (444 kSPS down to 100 SPS, power scales linearly)-are controlled via dedicated WARP and IMPULSE digital inputs, enabling dynamic adaptation to system-level timing and power requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16 bits - guarantees monotonic transfer function and no missing codes over full temperature range |
| Max Throughput | 570 kSPS in Warp mode - enables real-time spectral analysis of signals up to 18 MHz bandwidth |
| Analog Input Range | 0 V to 2.5 V - matches standard precision 2.5 V references like ADR421 without level-shifting circuitry |
| Power Dissipation | 77 mW at 444 kSPS (Impulse mode) - reduces thermal load in dense PCB layouts |
| INL Error | ±6 LSB - ensures <0.1% full-scale linearity error for precision instrumentation calibration |
| SNR | 86 dB at 100 kHz - supports >14-bit effective resolution for low-noise sensor digitization |
| Aperture Jitter | 5 ps rms - preserves signal integrity for high-frequency AC-coupled measurements |
| Interface Options | Parallel 16-bit bus or 2-wire serial (SPI/QSPI/MICROWIRE) - allows direct FPGA connection or microcontroller GPIO minimization |
Pinout & Package
AD7650ASTZRL is housed in a 48-lead LQFP (ST-48) package with exposed pad, specified for operation from –40°C to +85°C. Pin layout supports decoupled analog/digital grounds (AGND/DGND/OGND), separate analog/digital supplies (AVDD/DVDD/OVDD), and dual-mode interface routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN– | Differential analog input | Accepts 0 V to 2.5 V unipolar signal; IN– tied to AGND or driven differentially for noise rejection |
| REF, REFGND | External reference interface | Requires low-impedance 2.5 V source (e.g., ADR421); REFGND must be star-connected to AGND |
| CNVST | Conversion start trigger | Falling-edge initiated; controls sample/hold transition timing with 2 ns aperture delay |
| BUSY | Conversion status indicator | Active-HIGH during conversion; falling edge signals valid data ready for read |
| SER/PAR | Interface mode select | LOW = parallel 16-bit output; HIGH = serial mode using DATA[4–11] as SDOUT/SCLK/SYNC/SDIN |
| WARP, IMPULSE | Operating mode control | WARP HIGH + IMPULSE LOW = 570 kSPS; IMPULSE HIGH + WARP LOW = power-scaled impulse mode |
| OB/2C | Data format select | HIGH = straight binary (0x0000–0xFFFF); LOW = two's complement (0x8000–0x7FFF) |
| PD, RESET | Power management | PD HIGH enters 7 µW shutdown; RESET HIGH aborts ongoing conversion and clears internal logic |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Immediate data availability after BUSY falls - eliminates latency-induced phase errors in closed-loop control |
| Mode-selectable throughput | Three hardware-configurable modes (Warp/Normal/Impulse) enable one device to serve burst capture, continuous streaming, and ultra-low-power monitoring |
| Single 5 V supply operation | Eliminates need for dual-rail supplies while supporting 3 V or 5 V logic interface levels via OVDD pin |
| Pin-to-pin compatibility | Direct replacement for AD7664 in existing LQFP-48 layouts - simplifies upgrade paths for higher-speed SAR ADCs |
| Low aperture jitter | 5 ps rms enables accurate digitization of signals up to Nyquist frequency without SNR degradation |
Applications
| Data Acquisition Systems | Medical Instrumentation |
|---|---|
Use Scenario: High-channel-count industrial DAQ with multiplexed sensor inputs requiring synchronized sampling and minimal latency. IC Role / Device Role / Timing Role: Primary SAR ADC capturing 16-bit samples at 500 kSPS in Normal mode; BUSY signal used as DRDY interrupt for DMA-triggered reads. Use Value: No pipeline delay ensures deterministic timing between channel switching and conversion completion, critical for time-aligned multi-sensor correlation. | Use Scenario: Portable ECG monitor requiring low power consumption and high-resolution biopotential signal digitization. IC Role / Device Role / Timing Role: Core ADC operating in Impulse mode at 100–500 SPS; PD pin controlled by host MCU to gate power between measurement bursts. Use Value: 21 µW typical power at 100 SPS extends battery life while maintaining 16-bit resolution for R-wave amplitude quantification. |
| Spectrum Analysis Equipment | Digital Signal Processing Front-End |
Use Scenario: Real-time RF spectrum analyzer frontend digitizing IF signals up to 18 MHz bandwidth. IC Role / Device Role / Timing Role: ADC running in Warp mode at 570 kSPS; CNVST driven by low-jitter clock; OB/2C set to straight binary for FFT engine compatibility. Use Value: 86 dB SNR and 98 dB SFDR preserve dynamic range for detecting weak signals adjacent to strong interferers in crowded spectra. | Use Scenario: FPGA-based motor control system requiring precise current sensing with simultaneous voltage feedback sampling. IC Role / Device Role / Timing Role: Dual ADC configuration (via daisy-chained SDOUT) reading phase current and DC bus voltage; SER/PAR HIGH for compact serial interface. Use Value: Serial daisy-chain capability reduces FPGA pin count by 14 vs. parallel interface, freeing I/O for PWM generation and safety monitoring logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7664ASTZ | Same 48-lead LQFP package, 16-bit, 2.5 MSPS max throughput; higher power (120 mW), no Impulse mode | Better suited for high-throughput streaming where sustained >570 kSPS is required | Select AD7664ASTZ when system demands >2× speed and can accommodate higher power and thermal design |
| ADS8860IPWR | 16-bit, 1 MSPS, SPI-only interface, 20-lead VSSOP package; 0.5 µA power-down, no parallel bus | Ideal for space-constrained, ultra-low-power designs with microcontroller SPI host | Choose ADS8860IPWR when board area and standby power are prioritized over interface flexibility and LQFP compatibility |
Compared with AD7650ASTZRL, AD7664ASTZ offers higher speed but lacks power-scaling modes and increases thermal load, while ADS8860IPWR reduces size and quiescent power but sacrifices parallel interface support and package compatibility.
Availability
AD7650ASTZRL is available at Aetrix Electronics and suitable for data acquisition systems, medical instrumentation, spectrum analysis equipment, and digital signal processing front-ends requiring stable component supply and long-term industrial lifecycle support.
Supply support for AD7650ASTZRL 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.
The AD7650ASTZRL belongs to Analog Devices' PulSAR® family of precision SAR ADCs, designed specifically for applications demanding high resolution, low latency, and flexible power/performance scaling in harsh environments.
FAQ
What are the key differences between Warp, Normal, and Impulse modes in the AD7650ASTZRL?
The AD7650ASTZRL supports three hardware-selectable operating modes. Warp mode achieves 570 kSPS but requires inter-conversion intervals ≤1 ms to guarantee full accuracy. Normal mode delivers 500 kSPS with no timing constraints, making it ideal for asynchronous sampling. Impulse mode scales power linearly with throughput-e.g., 77 mW at 444 kSPS drops to 21 µW at 100 SPS-optimized for battery-powered monitoring. All modes retain 16-bit resolution and no pipeline delay.
Does the AD7650ASTZRL require an external voltage reference, and what are the specifications?
Yes, the AD7650ASTZRL requires an external precision voltage reference applied to the REF pin. The specified range is 2.3 V to (AVDD – 1.85 V), with 2.5 V being the nominal value. At 570 kSPS throughput, the reference draws 115 µA typical current. The ADR421 is explicitly recommended in the datasheet with a 47 µF decoupling capacitor, and REFGND must be connected directly to AGND with low-inductance routing to maintain 16-bit accuracy.
Can the AD7650ASTZRL interface directly with a 3 V microcontroller?
Yes, the AD7650ASTZRL supports mixed-voltage interfacing. Its OVDD pin accepts 2.7 V to 5.25 V, allowing direct connection to 3 V logic families. When SER/PAR = HIGH, the serial interface pins (DATA[4–11]) operate at OVDD levels, and digital input thresholds (VIH/VIL) are defined relative to OVDD-not DVDD-ensuring reliable communication with 3 V hosts without level shifters.
What is the significance of the OB/2C pin on the AD7650ASTZRL?
The OB/2C pin selects the digital output coding format of the AD7650ASTZRL. When OB/2C is HIGH, the 16-bit parallel or serial output is straight binary (0x0000 = 0 V, 0xFFFF = 2.5 V). When LOW, output is two's complement (0x8000 = 0 V, 0x7FFF = +FS/2, 0xFFFF = –LSB), enabling signed arithmetic in DSP applications. This setting affects all interface modes and is latched on each conversion, providing runtime flexibility without reconfiguration overhead.
Is the AD7650ASTZRL pin-to-pin compatible with other Analog Devices ADCs?
Yes, the AD7650ASTZRL is explicitly documented as pin-to-pin compatible with the AD7664 in its 48-lead LQFP package (ST-48). This allows drop-in replacement in existing designs targeting higher throughput-though users must verify timing margins, power delivery, and firmware handling of the AD7664's faster 2.5 MSPS rate and absence of Impulse mode power scaling.
AD7650ASTZRL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 570k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential
- Data Interface:
- SPI, Parallel, DSP
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-LQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7650ASTZRL FAQ
1.How can I place an order for AD7650ASTZRL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7650ASTZRL 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 AD7650ASTZRL reliable?
The price and inventory of AD7650ASTZRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7650ASTZRL is usually 5 days.
3.What payment methods are accepted for AD7650ASTZRL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7650ASTZRL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7650ASTZRL?
AD7650ASTZRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7650ASTZRL 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 AD7650ASTZRL?
For technical support, including AD7650ASTZRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7650ASTZRL requirements.
6.How does Aetrix verify that AD7650ASTZRL is sourced from the original manufacturer or authorized distributors?
All AD7650ASTZRL 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 AD7650ASTZRL meets industry standards.
7.What is the process for return or replacement of AD7650ASTZRL?
All AD7650ASTZRL units undergo pre-shipment inspection (PSI). If there is an issue with AD7650ASTZRL, 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 AD7650ASTZRL part is unused and in its original packaging.
Return procedure for AD7650ASTZRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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