Part A
AD7663ASTZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5007 PCS
- Package
- LQFP-48
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7664ASTZRL is a strong functional replacement candidate for the AD7663ASTZ, sharing the same 16-bit SAR architecture, 48-lead LQFP package, and identical pinout. Designers should validate the higher throughput requirement and confirm timing margins in the target application before committing to the substitution.
Resolution and Architecture
High match
Package and Pinout
High match
Sampling Rate
Validation required
Supply Voltage and Interface
High match
Parts at a glance
Part B
AD7664ASTZRL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 7597 PCS
- Package
- LQFP-48
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7663ASTZ | AD7664ASTZRL | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit SAR ADCs, so resolution is identical and does not affect substitutability. |
| Sampling Rate | 250 kSPS | 570 kSPS | The AD7664 offers a higher throughput, which matters for faster signal acquisition and higher-bandwidth applications. |
| Number of Input Channels | 2 (differential) | 1 (differential) | Channel count affects how many signals can be digitized; the AD7663 supports an additional input path. |
| Input Type | Differential | Differential | Both accept differential inputs, which improves noise immunity and common-mode rejection. |
| Supply Voltage (Analog) | 5 V | 5 V | Identical analog supply simplifies power-rail design and allows drop-in replacement in the analog domain. |
| Interface | Parallel / Serial (SPI/QSPI/MICROWIRE/DSP) | Parallel / Serial (SPI/QSPI/MICROWIRE/DSP) | Matching digital interfaces allow either part to connect to the same host processor without redesign. |
| Package / Case | 48-LQFP | 48-LQFP | Same package footprint enables physical board-level interchangeability. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings ensure equivalent environmental robustness for industrial applications. |
| Power Consumption | Typical 75 mW at 5 V | Typical 87 mW at 5 V | Power draw affects thermal budget and energy efficiency; the AD7664 consumes slightly more due to its higher speed. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7663ASTZ | AD7664ASTZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | PulSAR® | PulSAR® |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 250k | 570k |
| Number of Inputs | 1 | 1 |
| Input Type | Differential | Pseudo-Differential |
| Data Interface | SPI, Parallel, DSP | SPI, Parallel, DSP |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External | External |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 5V | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Features | True Bipolar | - |
Frequently asked questions
What are the key differences between the AD7663ASTZ and AD7664ASTZRL?
Both are 16-bit, 250 kSPS PulSAR analog-to-digital converters from Analog Devices in a 48-lead LQFP package. The AD7663ASTZ is a bipolar-input (±10 V, ±5 V, ±2.5 V) ADC, while the AD7664ASTZRL is a unipolar-input (0 V to 2.5 V) ADC. The AD7664ASTZRL is supplied in tape-and-reel packaging, whereas the AD7663ASTZ is a tray-style part.
Are the AD7663ASTZ and AD7664ASTZRL pin-compatible?
Yes. Both devices are offered in the same 48-lead LQFP (ST-48) package with the same pinout, which allows board-level interchangeability. However, because the analog input ranges differ (bipolar versus unipolar), the surrounding signal-conditioning circuitry must be validated before substitution.
What are the analog input voltage ranges for each device?
The AD7663ASTZ accepts bipolar inputs of ±10 V, ±5 V, or ±2.5 V, selectable via configuration. The AD7664ASTZRL accepts a unipolar input range of 0 V to 2.5 V. Designs must match the input range to the sensor or signal chain to avoid clipping or loss of resolution.
Do both converters offer the same resolution and throughput?
Yes. Both the AD7663ASTZ and AD7664ASTZRL are 16-bit successive-approximation (SAR) ADCs with a maximum throughput of 250 kSPS, making them comparable in resolution and sampling rate for precision data-acquisition applications.
What digital interfaces do the AD7663ASTZ and AD7664ASTZRL support?
Both devices provide a parallel interface and a serial interface (SPI/QSPI/MICROWIRE/DSP-compatible), allowing flexible connection to microcontrollers, DSPs, and FPGAs. The interface mode is selected through device configuration pins.
What are the typical supply and reference requirements for these ADCs?
Both parts operate from a 5 V analog supply (AVDD) and a 5 V digital supply (DVDD), with a separate VDRIVE pin for the digital I/O supply. They use an external reference; the reference voltage and input range configuration must be set according to the datasheet for each specific device.
Can the AD7664ASTZRL directly replace the AD7663ASTZ in an existing design?
Not without design review. Although the package and pinout are identical, the AD7663ASTZ is a bipolar-input device and the AD7664ASTZRL is a unipolar-input device. The analog front end, reference configuration, and input scaling must be revalidated against the AD7664ASTZRL datasheet before replacement.
What packaging difference exists between the AD7663ASTZ and AD7664ASTZRL?
The AD7663ASTZ is supplied in standard tray packaging, while the AD7664ASTZRL suffix indicates tape-and-reel packaging intended for automated high-volume assembly. Both use the same 48-lead LQFP body, so the packaging difference affects handling and production flow rather than PCB footprint.