AD7621ASTZ-RL7 - 16-Bit 3MSPS PulSAR ADC | Analog Devices
MPN: AD7621ASTZ-RL7 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $23.45 | $23.45 |
| 10 | $21.12 | $211.20 |
| 100 | $18.76 | $1,876.00 |
| 500 | $16.89 | $8,445.00 |
| 1,000 | $15.23 | $15,230.00 |
Drop-in alternatives for AD7621ASTZ-RL7 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
AD7621ASTZ
β Drop-Inβ In Stock
$15.9 / Unit
View Datasheet βAD7621ASTZRL
β Drop-Inπ Reference alternative (not in catalog)
AD7621BSTZ
β Drop-Inπ Reference alternative (not in catalog)
AD7621BCPZ
β Drop-Inβ In Stock
$14.08 / Unit
View Datasheet βAD7621ASTZ-RL
β Drop-Inπ Reference alternative (not in catalog)
AD7621ASTZ-RL7 Maximum Ratings & Electrical Characteristics
| Resolution | 16 bit |
| Sampling Rate | 3 MSPS (wideband warp and warp mode), 2 MSPS (normal mode), 1.25 MSPS (impulse mode) |
| Number of Inputs | 1 |
| Input Type | Differential |
| Data Interface | Parallel, Serial |
| Architecture | SAR |
| Reference Type | Internal |
| Internal Reference Voltage | 2.048 V |
| Differential Input Range | Β±VREF (VREF up to 2.5 V) |
| INL (Integral Nonlinearity) | 2 LSB |
| Supply Voltage | 2.5 V (single) |
| Package | 48-LQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | [DATA_NEEDED: operating temperature range] |
| RoHS Status | Compliant |
AD7621ASTZ-RL7 Pin Configuration
| Pin 1 | AVDD β Analog power supply |
| Pin 2 | AVSS β Analog ground |
| Pin 3 | IN+ β Positive differential input |
| Pin 4 | IN- β Negative differential input |
| Pin 5 | REF β Reference input/output |
| Pin 6 | REFGND β Reference ground |
| Pin 7 | DVDD β Digital power supply |
| Pin 8 | DGND β Digital ground |
| Pin 9 | BUSY β Busy output indicating conversion status |
| Pin 10 | CS β Chip select input |
| Pin 11 | RD β Read input for parallel interface |
| Pin 12 | SCLK β Serial clock input |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AD7621ASTZ-RL7 is suitable for 6 applications: High-Speed Data Acquisition, Medical Imaging, Instrumentation, Communication Systems, Industrial Process Control, Test and Measurement.
High-Speed Data Acquisition
The AD7621ASTZ-RL7 is ideal for high-speed data acquisition systems requiring 16-bit resolution and sampling rates up to 3 MSPS. Its fully differential input and low INL ensure accurate capture of fast-changing signals. In a typical DAQ system, the ADC is placed after a signal conditioning stage, converting analog sensor outputs into digital data for processing. The high throughput enables real-time monitoring in applications like vibration analysis and transient capture. The internal reference and conversion clock simplify the design, reducing external component count and board space. With a single 2.5 V supply, it is suitable for portable and battery-powered instruments.
Recommended
Medical Imaging
In medical imaging systems such as ultrasound and MRI, the AD7621ASTZ-RL7 provides high-resolution digitization of analog signals. Its 16-bit resolution and 3 MSPS sampling rate capture fine details in imaging data. The fully differential input rejects common-mode noise, improving image quality. The low power consumption is beneficial for portable medical devices. The ADC's small 48-LQFP package allows for compact PCB layouts in space-constrained equipment. The internal reference reduces external component count, enhancing reliability. The device's high linearity (2 LSB INL) ensures accurate representation of analog signals, critical for diagnostic accuracy.
Recommended
Instrumentation
The AD7621ASTZ-RL7 is well-suited for precision instrumentation such as digital multimeters, spectrum analyzers, and data loggers. Its 16-bit resolution and 3 MSPS sampling rate enable accurate measurement of a wide range of signals. The fully differential input allows direct connection to sensors with differential outputs, such as strain gauges and thermocouples. The device's low INL ensures measurement accuracy, and the internal reference provides a stable voltage reference. The parallel and serial interfaces offer flexibility in connecting to microcontrollers or DSPs. The single 2.5 V supply simplifies power design, and the small package is ideal for benchtop and portable instruments.
Recommended
Communication Systems
In communication systems, the AD7621ASTZ-RL7 is used in base stations, software-defined radios, and test equipment. Its high sampling rate and 16-bit resolution enable digitization of IF signals for digital signal processing. The fully differential input provides good common-mode rejection, essential in noisy RF environments. The device's low power consumption is advantageous for power-sensitive applications. The internal reference and conversion clock reduce external components, simplifying design. The parallel interface allows high-speed data transfer to FPGAs or DSPs. The small package is suitable for dense PCB layouts in communication infrastructure.
Recommended
Industrial Process Control
The AD7621ASTZ-RL7 is used in industrial process control systems for monitoring and controlling variables such as temperature, pressure, and flow. Its 16-bit resolution and 3 MSPS sampling rate allow precise measurement of fast-changing process signals. The fully differential input rejects common-mode noise from industrial environments. The device's low power consumption is suitable for field instruments. The internal reference and conversion clock reduce external component count, enhancing reliability. The parallel and serial interfaces provide flexibility in connecting to PLCs or microcontrollers. The small package is ideal for space-constrained control modules.
Recommended
Test and Measurement
The AD7621ASTZ-RL7 is a key component in test and measurement equipment such as oscilloscopes, logic analyzers, and signal generators. Its 16-bit resolution and 3 MSPS sampling rate enable accurate digitization of waveforms. The fully differential input allows connection to differential probes. The device's low INL ensures measurement accuracy, and the internal reference provides a stable voltage reference. The parallel interface enables high-speed data transfer to processing units. The single 2.5 V supply simplifies power design, and the small package is suitable for portable test equipment. The device's high performance makes it ideal for demanding measurement applications.
Recommended
Recommended Products Summary
Engineering reference data for AD7621ASTZ-RL7 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7621ASTZ | AD7621ASTZRL | AD7621BSTZ |
|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit |
| Sampling Rate | 3 MSPS | 3 MSPS | 3 MSPS | 3 MSPS |
| Input Type | Differential | Differential | Differential | Differential |
| Data Interface | Parallel, Serial | Parallel, Serial | Parallel, Serial | Parallel, Serial |
| INL | 2 LSB | 2 LSB | 2 LSB | 2 LSB |
| Supply Voltage | 2.5 V | 2.5 V | 2.5 V | 2.5 V |
Key Differentiators
- High speed with 16-bit resolution (vs AD7621ASTZ)
- Fully differential input (vs AD7621ASTZRL)
- Internal reference and conversion clock (vs AD7621BSTZ)
Design Notes
The AD7621ASTZ-RL7 operates from a single 2.5 V supply. Use low-noise LDO regulators to supply AVDD and DVDD separately to minimize digital noise coupling into the analog supply. Place 0.1 uF and 10 uF decoupling capacitors close to each power pin. The internal reference requires a stable supply; consider using a dedicated reference buffer if high accuracy is needed.
For optimal performance, use a solid ground plane and separate analog and digital ground areas, connecting them at a single point. Keep the analog input traces short and shielded to reduce noise pickup. The differential inputs should be routed as a pair with matched lengths. Place the ADC close to the signal source to minimize trace inductance.
Ensure the analog input voltage does not exceed the specified range to avoid damage. The reference pin should be bypassed with a 10 uF capacitor. When using the parallel interface, ensure proper timing to avoid bus contention. The internal conversion clock is sensitive to power supply noise; maintain clean supplies. Refer to the datasheet for layout guidelines.
Compliance Information
RoHS compliant per distributor listings. Other compliance data not specified in the provided data.
