Part A
AD7606BBSTZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6359 Stückzahl
- Package
- LQFP-64
- Series
- Datenerfassung von ADCs-DACs für besonderen Zweck
Replacement verdict
Compatible functional replacement candidate
The AD7606BBSTZ and AD7609BSTZ-RL are both 8-channel, 16-bit bipolar simultaneous-sampling SAR ADCs in a 64-lead LQFP package, making them strong functional replacement candidates. The AD7609BSTZ-RL offers true differential inputs versus the single-ended inputs of the AD7606BBSTZ, so the replacement is viable only when the system can accommodate differential signal routing and the associated input configuration differences.
Channel Count
High match
Resolution
High match
Package Type
High match
Input Configuration
Validation required
Parts at a glance
Part B
AD7609BSTZ-RL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5621 Stückzahl
- Package
- LQFP-64
- Series
- Datenerfassung von ADCs-DACs für besonderen Zweck
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-RL | 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 matters for precision applications requiring lower LSB size. |
| Input Type | Single-ended | True differential | Differential inputs improve common-mode noise rejection and are preferred for low-level or noisy signal environments; single-ended is simpler to interface. |
| Maximum Throughput (per channel) | 200 kSPS | 200 kSPS | Identical sampling rate means both support the same data acquisition bandwidth per channel. |
| Analog Input Range | ±5 V or ±10 V (selectable) | ±10 V or ±5 V (selectable) | Both offer selectable bipolar ranges, allowing direct interface to industrial signal levels without external conditioning. |
| Supply Voltage | 5 V (analog and digital) | 5 V (analog and digital) | Same supply requirements simplify power design and allow drop-in replacement in existing 5 V systems. |
| Integrated Input Clamp / Overvoltage Protection | Yes (up to ±16.5 V) | Yes (up to ±16.5 V) | On-chip clamp protection safeguards the ADC against overvoltage faults, reducing external protection components. |
| Package | 64-lead LQFP | 64-lead LQFP | Identical package and pinout enable direct PCB footprint compatibility between the two parts. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Same industrial temperature range ensures equivalent environmental robustness for both devices. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7606BBSTZ | AD7609BSTZ-RL |
|---|---|---|
| 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-RL?
The AD7606BBSTZ is an 8-channel, 16-bit, bipolar-input simultaneous-sampling ADC with a maximum throughput of 200 kSPS per channel, while the AD7609BSTZ-RL is an 8-channel, 18-bit, bipolar-input simultaneous-sampling ADC with a maximum throughput of 200 kSPS per channel. The primary differences are resolution (16-bit vs 18-bit) and the associated performance specifications such as SNR and INL.
Are the AD7606BBSTZ and AD7609BSTZ-RL pin-compatible?
Both devices are offered in a 64-lead LQFP package and share the same pinout for the analog input channels, digital interface, and power supply pins, allowing them to be used in the same PCB footprint. However, designers should verify all pin functions against the respective datasheets before substitution.
What is the analog input voltage range for each device?
Both the AD7606BBSTZ and AD7609BSTZ-RL feature bipolar analog input ranges of ±10 V and ±5 V, selectable via the RANGE pin. This makes them suitable for industrial applications requiring direct connection to bipolar sensors and signals.
How do the SNR specifications compare between the two ADCs?
The AD7609BSTZ-RL, with its 18-bit resolution, offers a higher typical SNR of approximately 100 dB, while the AD7606BBSTZ (16-bit) provides a typical SNR of approximately 90 dB. The higher SNR of the AD7609 makes it preferable for applications requiring greater dynamic range.
Do both devices support the same digital interface?
Yes, both the AD7606BBSTZ and AD7609BSTZ-RL support a parallel interface and a serial interface (SPI/QSPI/MICROWIRE/DSP-compatible), with the same pin configuration for interface selection. This allows for flexible connection to FPGAs, DSPs, and microcontrollers.
What are the power supply requirements for these ADCs?
Both devices operate from a single 5 V analog supply (AVCC) and a 2.3 V to 5.25 V digital supply (VDRIVE), with an internal reference or an external reference option. They also require a negative supply (VSS) for the bipolar input range, typically -5 V to -16.5 V, depending on the configuration.
Can the AD7606BBSTZ be used as a drop-in replacement for the AD7609BSTZ-RL?
While the devices are pin-compatible and share the same package, they are not direct drop-in replacements because of the difference in resolution (16-bit vs 18-bit) and associated performance specifications. System firmware and performance requirements must be validated to ensure the AD7606BBSTZ meets the application's accuracy and dynamic range needs.