Part A
AD7705BRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5488 PCS
- Package
- SOIC-16
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7705BRZ and AD7705BR-REEL are functionally equivalent implementations of the same 16-bit sigma-delta ADC, differing only in packaging format and delivery method. Both share identical die, electrical specifications, and pinout, making them interchangeable for design and production purposes. The primary distinction is that the AD7705BRZ is supplied in tube packaging while the AD7705BR-REEL is supplied on tape and reel for automated assembly. Selection between the two should be driven by manufacturing handling requirements rather than electrical or functional considerations.
Resolution and Architecture
High match
Package and Pinout
High match
Supply Voltage and Interface
High match
Packaging Format
Validation required
Parts at a glance
Part B
AD7705BR-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7972 PCS
- Package
- SOIC-16
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (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 | AD7705BRZ | AD7705BR-REEL | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Determines the smallest signal change the ADC can resolve; identical resolution means equivalent measurement precision. |
| Number of Input Channels | 2 differential | 2 differential | Defines how many sensor signals can be connected; matching channel count ensures the same system-level input capability. |
| Interface Type | SPI / 3-wire serial | SPI / 3-wire serial | The digital communication protocol must match the host microcontroller for drop-in compatibility. |
| Supply Voltage Range | 2.7 V to 3.3 V (DVDD), 2.7 V to 5.25 V (AVDD) | 2.7 V to 3.3 V (DVDD), 2.7 V to 5.25 V (AVDD) | Operating voltage must be compatible with the system power rails; identical ranges allow the same power design. |
| Package / Case | 16-Lead SOIC (Wide) | 16-Lead SOIC (Wide) | Footprint and soldering profile must match for PCB compatibility; identical package enables direct board replacement. |
| Mounting Type | Surface Mount | Surface Mount | Assembly method must match the manufacturing process; both being SMD ensures the same production flow. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Environmental tolerance must suit the application; identical ranges guarantee the same operating envelope. |
| Packaging / Delivery Form | Tube | Tape & Reel | Delivery form affects automated pick-and-place assembly and inventory handling; reel packaging suits high-volume SMT lines while tubes suit low-volume or manual assembly. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7705BRZ | AD7705BR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 500 | 500 |
| Number of Inputs | 2 | 2 |
| Input Type | Differential | Differential |
| Data Interface | SPI, DSP | SPI, DSP |
| Configuration | MUX-PGA-ADC | MUX-PGA-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.7V ~ 3.3V, 5V | 2.7V ~ 3.3V, 5V |
| Voltage - Supply, Digital | 2.7V ~ 3.3V, 5V | 2.7V ~ 3.3V, 5V |
| Features | PGA | PGA |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What is the difference between the AD7705BRZ and the AD7705BR-REEL?
Both parts are the same AD7705 16-bit sigma-delta ADC in a 16-lead SOIC package. The AD7705BRZ is supplied in tube packaging, while the AD7705BR-REEL is supplied on tape and reel for automated assembly. The electrical specifications and functional performance are identical.
Are the AD7705BRZ and AD7705BR-REEL electrically and functionally interchangeable?
Yes. Both variants share the same die, package, pinout, and datasheet specifications. The only difference is the shipping packaging format, so they are interchangeable in the target design.
What is the resolution and architecture of the AD7705?
The AD7705 is a 16-bit sigma-delta analog-to-digital converter with two differential input channels and an on-chip programmable gain amplifier. It is intended for low-frequency, high-resolution measurement applications.
What is the supply voltage range for the AD7705BRZ and AD7705BR-REEL?
Both variants operate from a single 2.7 V to 3.3 V supply or a 4.75 V to 5.25 V supply, as specified in the AD7705 datasheet. The supply range is identical for both packaging options.
What package do the AD7705BRZ and AD7705BR-REEL use?
Both parts are offered in a 16-lead SOIC package. The package outline, pin assignments, and PCB land pattern are the same for both ordering codes.
Which variant should be selected for high-volume automated assembly?
The AD7705BR-REEL is supplied on tape and reel, making it suitable for automated pick-and-place assembly lines. The AD7705BRZ in tube packaging is typically used for prototyping or low-volume production.
Do the AD7705BRZ and AD7705BR-REEL differ in temperature range or accuracy grade?
No. Both ordering codes correspond to the same B-grade accuracy and industrial temperature range as defined in the AD7705 datasheet. Packaging format does not affect the specified performance grade.