Part A
AD7767BRUZ-RL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6777 Stückzahl
- Package
- TSSOP-16
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7767BRUZ-RL7 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, power consumption, and full-scale input range. The AD7767 offers a lower maximum throughput and reduced power, making it suitable only where the system timing and signal chain can accommodate these differences. Design validation is required before substitution.
Package Type
High match
Resolution
High match
Maximum Sample Rate
Not compatible
Supply Voltage
Validation required
Parts at a glance
Part B
AD7764BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3383 Stückzahl
- Package
- TSSOP-28
- Series
- Datenerfassung mit 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 | AD7767BRUZ-RL7 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit delta-sigma ADCs, so nominal resolution is equivalent for precision measurement applications. |
| Maximum Sample Rate | 312 kSPS | 128 kSPS | The AD7764 supports a higher output data rate, which matters for wider-bandwidth signal acquisition; the AD7767 is limited to lower rates. |
| Number of Input Channels | 1 (differential) | 1 (differential) | Both provide a single differential input, so channel count is not a differentiator for substitutability. |
| Interface Type | SPI / Serial | SPI / Serial | Both use a serial interface compatible with SPI, simplifying digital host connection in either case. |
| Supply Voltage (Analog) | 2.5 V (AVDD) | 2.5 V (AVDD) | Matching analog supply requirements allows reuse of the same power rail design. |
| 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 AD7767 offers a wider temperature range, which matters for industrial or harsh-environment applications. |
| Power Consumption (Typical) | ~120 mW | ~15 mW | The AD7767 consumes significantly less power, which is critical for portable or power-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 | AD7767BRUZ-RL7 | AD7764BRUZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 128k | 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 differences between the AD7764BRUZ and AD7767BRUZ-RL7?
The AD7764BRUZ is a 24-bit, 312 kSPS sigma-delta ADC with a maximum throughput of 312 kSPS and a 120 dB dynamic range, housed in a 20-lead TSSOP. The AD7767BRUZ-RL7 is a 24-bit, 64 kSPS sigma-delta ADC with lower power consumption, supplied in a 16-lead TSSOP and delivered in tape-and-reel packaging. The primary differences are maximum sample rate, power consumption, package pin count, and shipping format.
Are the AD7764BRUZ and AD7767BRUZ-RL7 pin-compatible?
No. The AD7764BRUZ uses a 20-lead TSSOP package, while the AD7767BRUZ-RL7 uses a 16-lead TSSOP package. The different pin counts and pin assignments mean they are not drop-in replacements and require separate PCB layouts.
What is the maximum sample rate of each device?
The AD7764BRUZ supports a maximum throughput of 312 kSPS. The AD7767BRUZ-RL7 supports a maximum throughput of 64 kSPS. Designs requiring higher sampling bandwidth should select the AD7764BRUZ, while lower-rate, lower-power applications may use the AD7767BRUZ-RL7.
How do the power consumption figures compare?
The AD7764BRUZ typically consumes about 120 mW at 312 kSPS. The AD7767BRUZ-RL7 typically consumes about 15 mW at 64 kSPS. The AD7767BRUZ-RL7 is therefore better suited to power-sensitive designs, at the cost of a lower maximum sample rate.
Do both parts offer the same resolution and interface?
Both are 24-bit sigma-delta ADCs and both provide a serial SPI-compatible interface for configuration and data readback. Resolution is identical at 24 bits, but dynamic range and throughput differ: the AD7764BRUZ provides approximately 120 dB dynamic range, while the AD7767BRUZ-RL7 provides approximately 112 dB dynamic range.
What does the -RL7 suffix indicate on the AD7767BRUZ-RL7?
The -RL7 suffix indicates tape-and-reel packaging, typically 7-inch reels, as opposed to the tube packaging of the AD7764BRUZ. This affects handling and automated assembly but not the electrical specifications of the device.
Can the AD7767BRUZ-RL7 replace the AD7764BRUZ in an existing design?
Not directly. Because the devices differ in package pin count, maximum sample rate, power consumption, and dynamic range, a replacement requires a new PCB layout and revalidation of the signal chain against the system's sampling-rate and accuracy requirements. Consult the respective manufacturer datasheets before substitution.