Part A
AD7766BRUZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2772 ПКС
- Package
- TSSOP-16
- Series
- Сбор данных - аналогово-цифровые преобразователи (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7766BRUZ-2 and AD7766BRUZ share the same 24-bit sigma-delta ADC architecture, TSSOP-16 package, and supply topology, making them functionally interchangeable in most designs. The primary distinction is the maximum output data rate, where the BRUZ-2 variant supports a higher sampling rate; designers should confirm that the system timing and digital interface can accommodate this difference before substituting.
Resolution
High match
Package Type
High match
Supply Voltage
High match
Maximum Output Data Rate
Validation required
Parts at a glance
Part B
AD7766BRUZ-2
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7052 ПКС
- Package
- TSSOP-16
- Series
- Сбор данных - аналогово-цифровые преобразователи (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 | AD7766BRUZ-2 | AD7766BRUZ | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit delta-sigma ADCs, so resolution is identical and not a differentiator. |
| Maximum Sample Rate | 64 kSPS | 128 kSPS | The -2 variant runs at half the maximum output data rate, directly affecting achievable signal bandwidth and throughput in the application. |
| Output Data Rate Range | 8 kSPS to 64 kSPS | 16 kSPS to 128 kSPS | The selectable ODR range determines the trade-off between noise performance and speed; the -2 part cannot reach the higher rates of the standard part. |
| Signal-to-Noise Ratio (SNR) | 112.5 dB (typical) | 112.5 dB (typical) | SNR is essentially the same, so noise performance is comparable when operated at equivalent data rates. |
| Supply Voltage (Analog & Digital) | 2.5 V (AVDD), 2.5 V (DVDD) | 2.5 V (AVDD), 2.5 V (DVDD) | Identical supply requirements mean the parts are interchangeable from a power-rail perspective. |
| Package | 16-Lead TSSOP | 16-Lead TSSOP | Same package and pinout allow drop-in board replacement without layout changes. |
| Interface | SPI (serial) | SPI (serial) | Identical serial interface ensures firmware and digital host compatibility between the two parts. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Same temperature range means both suit the same industrial environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7766BRUZ | AD7766BRUZ-2 |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 128k | 32k |
| 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 | SAR |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.5V | 2.5V |
| Voltage - Supply, Digital | 2.5V | 2.5V |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
Frequently asked questions
What is the primary difference between the AD7766BRUZ-2 and the AD7766BRUZ?
The AD7766BRUZ-2 and AD7766BRUZ are both 24-bit, 8.5 mW, 109 dB sigma-delta ADCs from Analog Devices in a 16-lead TSSOP package. The key difference is the maximum output data rate: the AD7766BRUZ-2 supports up to 32 kSPS, while the AD7766BRUZ supports up to 64 kSPS. Both share the same pinout and core architecture, but the -2 variant is specified for the lower speed grade.
Are the AD7766BRUZ-2 and AD7766BRUZ pin-compatible?
Yes. Both devices are offered in the same 16-lead TSSOP (RU-16) package with an identical pin configuration, so they are pin-compatible and can share the same PCB footprint. Electrical performance differences between the two speed grades must still be validated for the target design.
What are the maximum output data rates of the AD7766BRUZ-2 and AD7766BRUZ?
The AD7766BRUZ-2 provides a maximum output data rate of 32 kSPS, while the AD7766BRUZ provides a maximum output data rate of 64 kSPS. Both are 24-bit sigma-delta converters with the same analog input structure and digital interface.
Do both parts support the same supply voltage and digital interface?
Yes. Both the AD7766BRUZ-2 and AD7766BRUZ operate from a 2.5 V analog supply (AVDD) and a 2.5 V digital supply (DVDD), with a separate VREF input, and use the same serial SPI-compatible interface for configuration and data readback. The difference between the two is the rated maximum output data rate, not the supply or interface architecture.
Can the AD7766BRUZ-2 be used as a drop-in replacement for the AD7766BRUZ?
Because the two parts are pin-compatible and share the same package and interface, the AD7766BRUZ-2 can physically replace the AD7766BRUZ on an existing board. However, the AD7766BRUZ-2 has a lower maximum output data rate (32 kSPS versus 64 kSPS), so it should only be used as a replacement where the system does not require data rates above 32 kSPS. The substitution should be validated against the Analog Devices datasheet for the specific design.
What is the resolution and typical power consumption of these AD7766 variants?
Both the AD7766BRUZ-2 and AD7766BRUZ are 24-bit sigma-delta ADCs with a typical power consumption of approximately 8.5 mW. They are designed for low-power, high-resolution data acquisition applications such as industrial instrumentation and medical monitoring.
Which part should be selected for a design requiring 64 kSPS sampling?
The AD7766BRUZ should be selected for designs requiring sampling at up to 64 kSPS, since the AD7766BRUZ-2 is limited to a maximum output data rate of 32 kSPS. Both parts otherwise share the same 24-bit resolution, package, pinout, and supply requirements.