Part A
AD7609BSTZ-RL
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 5621 個数
- Package
- LQFP-64
- Series
- データ取得 - ADC/DAC - 特殊用途向け
Replacement verdict
Compatible functional replacement candidate
The AD7606BSTZ and AD7609BSTZ-RL share the same 16-bit, 8-channel simultaneous-sampling SAR architecture, identical 64-lead LQFP footprint, and the same parallel/serial interface, making them strong functional replacement candidates. The AD7609BSTZ-RL adds true differential inputs and a wider ±10 V bipolar range, so the substitution is viable only when the differential input configuration and slightly higher power consumption are acceptable for the target design.
Resolution and Channel Count
High match
Package and Pinout
High match
Input Configuration
Validation required
Power Consumption
Validation required
Parts at a glance
Part B
AD7606BSTZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4502 個数
- Package
- LQFP-64
- Series
- データ取得 - ADC/DAC - 特殊用途向け
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7606BSTZ | AD7609BSTZ-RL | Why it matters |
|---|---|---|---|
| Number of ADC Channels | 8 | 8 | Both are 8-channel devices, so channel count is not a differentiator for substitutability. |
| Resolution | 16 bits | 18 bits | The AD7609 offers higher resolution (18-bit vs 16-bit), which affects measurement accuracy and dynamic range in precision applications. |
| Input Type | Single-ended | True differential | Differential inputs improve common-mode noise rejection and are preferred for low-level signal acquisition; single-ended is simpler for ground-referenced signals. |
| Throughput Rate (per channel) | 200 kSPS | 200 kSPS | Identical maximum sampling rate means timing and throughput requirements are met by either part. |
| Analog Input Range | ±5 V or ±10 V (selectable) | ±10 V or ±5 V (selectable) | Both support the same selectable bipolar input ranges, allowing direct substitution for industrial ±10 V and ±5 V signal chains. |
| Supply Voltage | 5 V analog, 2.3–5.25 V digital | 5 V analog, 2.3–5.25 V digital | Matching supply requirements means the same power rails can be reused without redesign. |
| Interface | Parallel / Serial (SPI) | Parallel / Serial (SPI) | Identical digital interface options allow the same host connection and firmware to be used. |
| Package | 64-lead LQFP | 64-lead LQFP | Same package and pinout enable drop-in board replacement without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature range ensures both parts suit the same environmental conditions. |
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 | AD7609BSTZ-RL | AD7606BSTZ |
|---|---|---|
| Part Status | Active | Active |
| Type | Data Acquisition System (DAS), ADC | Data Acquisition System (DAS), ADC |
| Number of Channels | 8 | 8 |
| Resolution(Bits) | 18 b | 16 b |
| Sampling Rate(Per Second) | 200k | 200k |
| Data Interface | SPI, DSP | DSP, MICROWIRE™, Parallel, QSPI™, Serial, SPI™ |
| Voltage Supply Source | Analog and Digital | Analog and Digital |
| Voltage - Supply | 2.3V ~ 5V, 4.75V ~ 5.25V | 2.3V ~ 5.25V, 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD7606BSTZ and the AD7609BSTZ-RL?
The AD7606BSTZ is an 8-channel, 16-bit, bipolar-input simultaneous-sampling ADC, while the AD7609BSTZ-RL is an 8-channel, 18-bit, true-differential-input simultaneous-sampling ADC. The AD7609 offers higher resolution (18-bit vs 16-bit) and true differential inputs, whereas the AD7606 provides single-ended inputs with a 16-bit SAR converter. Both are pin-compatible in the same 64-lead LQFP package and share the same 5 V single-supply architecture with on-chip input clamping, track-and-hold, and reference.
Are the AD7606BSTZ and AD7609BSTZ-RL pin-compatible and package-compatible?
Yes. Both devices are offered in the same 64-lead LQFP (STZ) package with identical pinout assignments, allowing a common PCB footprint. However, because the AD7609 uses true differential analog inputs while the AD7606 uses single-ended inputs, the analog front-end circuitry and input signal routing must be redesigned accordingly even though the package and pin locations match.
What are the resolution and input configuration differences between these two ADCs?
The AD7606BSTZ provides 16-bit resolution with eight single-ended bipolar input channels, supporting selectable input ranges of ±5 V or ±10 V. The AD7609BSTZ-RL provides 18-bit resolution with eight true-differential bipolar input channels, supporting selectable ranges of ±10 V or ±20 V (differential). The higher 18-bit resolution of the AD7609 yields finer LSB size and improved dynamic range for differential signal acquisition.
Do both devices support the same throughput rate and simultaneous sampling?
Yes. Both the AD7606BSTZ and AD7609BSTZ-RL are 8-channel simultaneous-sampling ADCs with a maximum throughput of 200 kSPS per channel. All eight channels are sampled simultaneously via on-chip track-and-hold amplifiers, making both devices suitable for multi-phase power monitoring and motor control applications requiring phase-coherent acquisition.
What supply and reference architecture do the AD7606BSTZ and AD7609BSTZ-RL share?
Both devices operate from a single 5 V analog supply (AVCC) with a separate 2.3 V to 5.25 V VDRIVE supply for the digital interface, and both integrate an on-chip 2.5 V reference with the option to use an external reference. They also include on-chip input clamp protection, an on-chip oscillator, and a flexible parallel/serial digital interface compatible with SPI/QSPI/MICROWIRE/DSP.
Can the AD7609BSTZ-RL be used as a drop-in replacement for the AD7606BSTZ in an existing design?
Not as a direct drop-in replacement. Although the package and pinout are identical, the AD7609 uses true differential inputs and 18-bit resolution versus the AD7606's single-ended inputs and 16-bit resolution. The analog input configuration, front-end signal conditioning, and digital data word length differ, so firmware and analog circuitry must be validated against the AD7609 datasheet before substitution.
Which device is better suited for differential signal acquisition?
The AD7609BSTZ-RL is the appropriate choice for differential signal acquisition because it provides eight true-differential bipolar input channels with 18-bit resolution and ±10 V or ±20 V differential ranges. The AD7606BSTZ, with its single-ended inputs, is better suited to single-ended multi-channel applications where 16-bit resolution is sufficient.
What are the operating temperature ranges for the AD7606BSTZ and AD7609BSTZ-RL?
Both the AD7606BSTZ and AD7609BSTZ-RL are specified over the industrial temperature range of −40°C to +85°C, consistent with the STZ grade suffix in their part numbers. Designers should confirm the exact grade and temperature specification against the respective Analog Devices datasheets for the target application.