Part A
AD7766BRUZ-2
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7052 PCS
- Package
- TSSOP-16
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7766BRUZ-2 is a functionally related but not drop-in replacement for the AD7764BRUZ. Both are 24-bit sigma-delta ADCs in a 20-lead TSSOP package with similar serial interface architecture, but they differ in maximum sample rate, analog input configuration, and power consumption. Designers must validate clocking, input drive, and timing against the target application before substituting.
Package Type
High match
Resolution
High match
Maximum Sample Rate
Not compatible
Analog Input Configuration
Validation required
Parts at a glance
Part B
AD7764BRUZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3383 PCS
- Package
- TSSOP-28
- Series
- Data Acquisition - Analog to Digital Converters (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 | AD7764BRUZ | AD7766BRUZ-2 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit delta-sigma ADCs, so nominal resolution is equivalent for precision measurement applications. |
| Maximum Sampling Rate | 312 kSPS | 64 kSPS | The AD7764 supports a much higher output data rate, which matters for wide-bandwidth signal acquisition; the AD7766-2 is limited to lower rates. |
| Input Type | Differential | Differential | Both accept differential inputs, preserving common-mode rejection and noise immunity in sensor interfaces. |
| Supply Voltage (Analog) | 2.5 V (AVDD) | 2.5 V (AVDD) | Matching analog supply simplifies power-rail design when considering substitution. |
| Digital Supply Voltage (DVDD) | 2.5 V to 3.6 V | 2.5 V to 3.6 V | Compatible DVDD ranges allow either part to interface with the same logic levels. |
| Interface | SPI / Serial | SPI / Serial | Both use a serial interface, so the host microcontroller connection is functionally similar. |
| Package | 20-Lead TSSOP | 16-Lead TSSOP | Different package pin counts and footprints mean the PCB layout must be redesigned; they are not drop-in replacements. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +105 °C | The AD7766-2 supports a wider temperature range, which matters for industrial and harsh-environment applications. |
| Power Consumption (typical) | Higher (approx. 100 mW class) | Lower (approx. 15 mW class) | The AD7766-2 is significantly lower power, which matters for portable or thermally constrained designs. |
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 | AD7766BRUZ-2 | AD7764BRUZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 32k | 312k |
| Number of Inputs | 1 | 1 |
| Input Type | Differential | Differential |
| Data Interface | SPI | SPI |
| Configuration | ADC | ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | Sigma-Delta |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.5V | 2.5V, 5V |
| Voltage - Supply, Digital | 2.5V | 2.5V |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 85°C |
Frequently asked questions
What are the key architectural differences between the AD7764BRUZ and AD7766BRUZ-2?
The AD7764BRUZ is a 24-bit, 312 kSPS sigma-delta ADC with a programmable digital filter and a parallel/serial interface, housed in a 28-lead TSSOP. The AD7766BRUZ-2 is a 24-bit, 64 kSPS sigma-delta ADC with a fixed low-latency digital filter and a serial interface, housed in a 16-lead TSSOP. The AD7764 offers higher throughput and filter programmability, while the AD7766-2 targets lower-speed, low-latency applications with a smaller package.
Are the AD7764BRUZ and AD7766BRUZ-2 pin-compatible?
No. The AD7764BRUZ uses a 28-lead TSSOP package, while the AD7766BRUZ-2 uses a 16-lead TSSOP package. The pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements.
How do the maximum output data rates compare?
The AD7764BRUZ supports output data rates up to 312 kSPS. The AD7766BRUZ-2 supports output data rates up to 64 kSPS. Designs requiring higher sampling throughput should select the AD7764BRUZ.
Do both devices provide the same digital filter capabilities?
No. The AD7764BRUZ includes a programmable digital filter that allows the user to configure filter characteristics. The AD7766BRUZ-2 uses a fixed digital filter optimized for low latency. The filter architectures and configurability are therefore not equivalent.
What interface options are available on each device?
The AD7764BRUZ provides both parallel and serial interface options for data output. The AD7766BRUZ-2 provides a serial interface. System designs requiring a parallel data bus should use the AD7764BRUZ.
Can the AD7766BRUZ-2 replace the AD7764BRUZ in an existing design?
Not directly. The devices differ in package, pinout, maximum data rate, filter architecture, and interface options. A replacement requires schematic, layout, and firmware changes, and the lower 64 kSPS rate of the AD7766BRUZ-2 must be acceptable for the application.
Which device is better suited for low-latency signal chains?
The AD7766BRUZ-2 is specified with a fixed low-latency digital filter, making it suitable for low-latency signal chains at data rates up to 64 kSPS. The AD7764BRUZ, with its programmable filter and higher 312 kSPS rate, is oriented toward higher-throughput applications where filter configurability is beneficial.