Part A
AD7616BSTZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1872 Stückzahl
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7616BSTZ and AD7612BSTZ-RL share the same 16-bit SAR ADC architecture and LQFP-64 package, making them functionally related candidates. However, the AD7616 offers a dual simultaneous-sampling 16-channel front end while the AD7612 is a single-channel device, so the AD7612BSTZ-RL cannot directly substitute for the AD7616BSTZ in multi-channel simultaneous-sampling applications. The AD7616BSTZ is the more capable device and is the recommended choice where channel count and throughput are critical; the AD7612BSTZ-RL is only a viable candidate for single-channel designs requiring validation of timing and interface compatibility.
Channel Count
Validation required
Resolution
High match
Package Type
High match
Sampling Architecture
Validation required
Parts at a glance
Part B
AD7612BSTZ-RL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6903 Stückzahl
- Package
- LQFP-48
- Series
- Datenerfassung mit Analog to Digital Converters (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 | AD7616BSTZ | AD7612BSTZ-RL | Why it matters |
|---|---|---|---|
| Number of ADC Channels | 16 (dual simultaneous, 8+8) | 1 | Channel count determines how many analog signals can be digitized; a 16-channel device cannot be substituted by a single-channel part in multi-channel systems. |
| Resolution | 16 bits | 12 bits | Resolution sets the smallest measurable signal step; a 16-bit ADC offers 16x finer quantization than a 12-bit device, affecting accuracy-critical designs. |
| Sampling Rate (max) | 1 MSPS per channel | 1 MSPS | Maximum throughput limits the bandwidth of signals that can be captured; both reach 1 MSPS but the AD7616 does so across 16 channels simultaneously. |
| Input Configuration | Single-ended (16) or differential (8) | Single-ended / differential (software selectable) | Input topology must match the sensor or signal source; differential inputs improve noise immunity while single-ended suits referenced signals. |
| Package / Pin Count | 80-lead LQFP | 48-lead LQFP | Footprint and pin count dictate PCB layout compatibility; different packages are not drop-in interchangeable. |
| Supply Voltage | 5 V analog, 2.3–3.6 V digital (DVCC) | 5 V analog, 2.7–5.25 V digital (DVCC) | Supply rails must match the host system; differing digital supply ranges affect logic-level compatibility and level shifting needs. |
| Digital Interface | Parallel or serial (SPI/QSPI/MICROWIRE/DSP) | Parallel or serial (SPI/QSPI/MICROWIRE/DSP) | Interface type must match the host controller; both support parallel and serial modes, easing protocol-level substitution. |
| SNR (typ) | 92 dB | 72 dB | Signal-to-noise ratio defines dynamic range; the higher SNR of the AD7616 enables detection of smaller signals in noisy environments. |
| INL (typ) | ±0.5 LSB | ±0.5 LSB | Integral nonlinearity indicates linearity error; matching INL values suggest comparable static accuracy despite differing resolution. |
| Operating Temperature Range | −40 °C to +85 °C | −40 °C to +85 °C | Temperature range confirms suitability for industrial environments; identical ratings mean both meet the same thermal requirements. |
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 | AD7616BSTZ | AD7612BSTZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Series | - | iCMOS®, PulSAR® |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | - | 750k |
| Number of Inputs | 16 | 1 |
| Input Type | Single Ended | Differential |
| Data Interface | DSP, MICROWIRE™, Parallel, QSPI™, Serial, SPI™ | SPI, Parallel, DSP |
| Configuration | MUX-ADC | S/H-ADC |
| Ratio - S / H: ADC | - | 1:1 |
| Number of A/D Converters | - | 1 |
| Architecture | SAR | SAR |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 4.75V ~ 5.25V | 5V |
| Voltage - Supply, Digital | 2.3V ~ 3.6V | 5V |
| Features | Simultaneous Sampling | True Bipolar |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Base Product Number | AD7616 | - |
| Sampling Rate (Per Second) | 1M | - |
| Number of A / D Converters | 2 | - |
| Mounting Type | Surface Mount | - |
| Packaging | Tray | - |
Frequently asked questions
What are the key architectural differences between the AD7616BSTZ and the AD7612BSTZ-RL?
The AD7616BSTZ is a 16-channel, 16-bit, 1 MSPS dual simultaneous-sampling SAR ADC with on-chip oversampling and a flexible parallel/serial interface. The AD7612BSTZ-RL is a single-channel, 16-bit, 750 kSPS SAR ADC with a parallel interface and no multiplexer. The AD7616 integrates a 16-channel input mux and two simultaneous ADCs, while the AD7612 is a single-channel converter in a smaller footprint.
Are the AD7616BSTZ and AD7612BSTZ-RL pin-compatible or package-compatible?
No. The AD7616BSTZ is supplied in a 64-lead LQFP package, while the AD7612BSTZ-RL is supplied in a 48-lead LQFP package. The pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements for each other.
How do the sampling rates and channel counts compare?
The AD7616BSTZ provides 16 analog input channels with dual simultaneous sampling at up to 1 MSPS per channel pair. The AD7612BSTZ-RL provides a single analog input channel at up to 750 kSPS. The AD7616 is intended for multi-channel simultaneous-sampling applications, whereas the AD7612 targets single-channel high-accuracy acquisition.
Do both devices support the same digital interface?
No. The AD7616BSTZ supports a flexible parallel or serial interface (including SPI-compatible serial and byte/word parallel modes). The AD7612BSTZ-RL provides a parallel interface only. System designers must account for these interface differences when considering either part.
What are the analog input voltage ranges for each device?
The AD7616BSTZ offers software-selectable input ranges of ±10 V, ±5 V, and ±2.5 V, with a 5 V single supply and separate digital supply. The AD7612BSTZ-RL offers a ±10 V input range (with a 5 V reference) in its standard configuration. Input range selection and reference requirements should be confirmed against the respective datasheets for the target design.
Can the AD7612BSTZ-RL replace the AD7616BSTZ in an existing design?
No, not directly. The AD7612BSTZ-RL has fewer channels (1 vs 16), a different package (48-lead vs 64-lead LQFP), a lower maximum throughput (750 kSPS vs 1 MSPS), and a parallel-only interface. A direct substitution would require significant redesign of the analog front end, PCB layout, and digital interface.
Which device is better suited for multi-channel simultaneous-sampling applications?
The AD7616BSTZ is the appropriate choice for multi-channel simultaneous-sampling applications because it integrates a 16-channel multiplexer with dual simultaneous-sampling ADCs, enabling correlated acquisition across channel pairs. The AD7612BSTZ-RL, being a single-channel ADC, is suited to applications requiring one high-accuracy channel rather than multi-channel simultaneity.