Part A
AD7606BBSTZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6359 PCS
- Package
- LQFP-64
- Series
- Data Acquisition - ADCs-DACs - Special Purpose
Replacement verdict
Compatible functional replacement candidate
The AD7606BBSTZ and AD7609BSTZ are both 8-channel, 16-bit bipolar simultaneous-sampling SAR ADCs in a 64-lead LQFP package, sharing the same supply rails and serial/parallel interface architecture, so the AD7609BSTZ can serve as a functional substitute for the AD7606BBSTZ in many designs. However, the AD7609 provides true differential inputs with a fixed ±10 V range, whereas the AD7606B offers single-ended inputs with selectable ranges and additional features such as oversampling and a digital filter; input configuration, range scaling, and firmware settings must therefore be reviewed before substitution.
Channel Count
High match
Resolution
High match
Package Type
High match
Input Configuration
Validation required
Parts at a glance
Part B
AD7609BSTZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7244 PCS
- Package
- LQFP-64
- Series
- Data Acquisition - ADCs-DACs - Special Purpose
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7606BBSTZ | AD7609BSTZ | Why it matters |
|---|---|---|---|
| Number of ADC Channels | 8 | 8 | Both are 8-channel devices, so channel count is functionally equivalent for multi-channel acquisition systems. |
| Resolution | 16 bits | 18 bits | Higher resolution in the AD7609 provides finer measurement granularity, which affects precision-critical applications. |
| Input Type | Single-ended | True differential | Differential inputs improve common-mode noise rejection and are not directly interchangeable with single-ended front ends. |
| Throughput Rate (max) | 200 kSPS | 200 kSPS | Identical maximum sampling rate means timing and throughput budgets remain compatible between the two parts. |
| Analog Input Range | ±5 V or ±10 V (selectable) | ±10 V or ±5 V (selectable) | Both support the same selectable bipolar ranges, allowing similar sensor and signal-chain interfacing. |
| Supply Voltage | 5 V analog, 2.3 V to 5.25 V digital | 5 V analog, 2.3 V to 5.25 V digital | Matching supply requirements simplify power-rail design and allow drop-in compatibility at the board level. |
| Integrated Input Clamp / Overvoltage Protection | Yes (up to ±16.5 V) | Yes (up to ±16.5 V) | On-chip protection against overvoltage reduces external component count and improves robustness in industrial environments. |
| Interface | Parallel and serial (SPI/QSPI/MICROWIRE/DSP) | Parallel and serial (SPI/QSPI/MICROWIRE/DSP) | Identical digital interface options allow reuse of the same host controller and firmware with minimal changes. |
| Package | 64-lead LQFP | 64-lead LQFP | Same package and pin count support a common PCB footprint, easing substitution and layout reuse. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ratings ensure both parts suit the same environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7606BBSTZ | AD7609BSTZ |
|---|---|---|
| Part Status | Active | Active |
| Type | Data Acquisition System (DAS), ADC | Data Acquisition System (DAS), ADC |
| Number of Channels | 8 | 8 |
| Resolution(Bits) | 16 b | 18 b |
| Sampling Rate(Per Second) | 800k | 200k |
| Data Interface | Parallel, Serial | SPI, DSP |
| Voltage Supply Source | Analog and Digital | Analog and Digital |
| Voltage - Supply | 1.71V ~ 4.75V, 3.6V ~ 5.25V | 2.3V ~ 5V, 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD7606BBSTZ and the AD7609BSTZ?
The AD7606BBSTZ is an 8-channel, 16-bit, 200 kSPS bipolar simultaneous-sampling ADC with on-chip digital filters, while the AD7609BSTZ is an 8-channel, 18-bit, 200 kSPS bipolar simultaneous-sampling ADC without the digital filter feature. The AD7609 offers higher resolution (18-bit vs 16-bit), whereas the AD7606B includes configurable digital filter options and additional oversampling capabilities.
Are the AD7606BBSTZ and AD7609BSTZ pin-compatible?
Both devices are offered in the same 64-lead LQFP package (STZ suffix) and share a similar pinout for the analog input, power supply, and digital interface pins. However, designers should verify pin function differences against the respective datasheets before considering a direct PCB swap, as some pin assignments and configuration options differ between the two parts.
What is the resolution and sampling rate of each device?
The AD7606BBSTZ provides 16-bit resolution at a maximum throughput of 200 kSPS per channel. The AD7609BSTZ provides 18-bit resolution at a maximum throughput of 200 kSPS per channel. Both are simultaneous-sampling ADCs with eight analog input channels.
Do both parts support the same analog input range?
Yes. Both the AD7606BBSTZ and AD7609BSTZ support bipolar true differential analog input ranges of ±10 V and ±5 V, making them suitable for industrial signal acquisition where high-voltage bipolar inputs are required.
Does the AD7606BBSTZ include digital filtering that the AD7609BSTZ lacks?
Yes. The AD7606B family includes an on-chip digital filter with configurable oversampling ratios and a first-order sinc filter, allowing improved noise performance and flexible bandwidth control. The AD7609BSTZ does not include this configurable digital filter block, so filtering must be performed externally or in the digital host.
What digital interfaces do these ADCs provide?
Both devices provide a parallel interface and a serial interface for connection to host processors or FPGAs. The AD7606B additionally supports a serial interface with optional CRC and other enhanced digital features. Designers should confirm the specific interface mode and timing requirements in each datasheet.
Which device is better suited for higher-precision applications?
The AD7609BSTZ is better suited for higher-precision applications because it offers 18-bit resolution compared with the 16-bit resolution of the AD7606BBSTZ. For applications requiring digital filtering flexibility and oversampling, the AD7606BBSTZ may be preferred despite its lower resolution.
Are both devices specified for industrial temperature ranges?
Yes. Both the AD7606BBSTZ and AD7609BSTZ are specified for the industrial temperature range of −40°C to +85°C, consistent with their use in industrial measurement and control systems.