Part A
AD4115BCPZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6823 PCS
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD4111BCPZ-RL7 and AD4115BCPZ are both single-supply, 24-bit sigma-delta ADCs in the same 40-lead LFCSP package, sharing a common architecture and SPI interface. However, they differ in analog input channel count, maximum input voltage range, and integrated diagnostic features, so the AD4115BCPZ is not a direct drop-in replacement for the AD4111BCPZ-RL7. Designers must validate channel count, input range, and system-level diagnostics before substituting one for the other.
Channel Count
Validation required
Input Voltage Range
Validation required
Package Type
High match
Diagnostic Features
Validation required
Parts at a glance
Part B
AD4111BCPZ-RL7
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4417 PCS
- Package
- VFQFN-40
- Series
- Acquisition de données - Convertisseur analogique - numérique (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 | AD4111BCPZ-RL7 | AD4115BCPZ | Why it matters |
|---|---|---|---|
| Number of Input Channels | 4 differential / 8 single-ended | 8 differential / 16 single-ended | Channel count determines how many sensor signals can be digitized by a single device, directly affecting system scalability and board layout. |
| ADC Architecture | Sigma-Delta (24-bit) | Sigma-Delta (24-bit) | Both use sigma-delta conversion, providing high resolution and noise rejection suitable for precision industrial measurement. |
| Input Voltage Range | ±10 V (voltage inputs) | ±10 V (voltage inputs) | Matching input ranges ensures the same sensor signals can be interfaced without additional signal conditioning. |
| Current Input Support | Yes (0-20 mA / 4-20 mA) | No | Current input capability allows direct connection of industrial current-loop sensors, which is critical for process control applications. |
| Integrated Features | Voltage + current inputs, open-wire detection | Voltage inputs only | Integrated current inputs and diagnostics reduce external circuitry and simplify system design for mixed-signal applications. |
| Data Output Rate | Up to 31.25 kSPS | Up to 31.25 kSPS | Output rate determines the maximum sampling speed for dynamic signals and affects anti-aliasing filter requirements. |
| Interface | SPI | SPI | A standard SPI interface ensures compatibility with most microcontrollers and digital signal processors. |
| Supply Voltage | 2.7 V to 5.5 V (digital), ±15 V (analog) | 2.7 V to 5.5 V (digital), ±15 V (analog) | Compatible supply requirements allow the same power architecture to be used for either device. |
| Package | 40-lead LFCSP (6 mm x 6 mm) | 40-lead LFCSP (6 mm x 6 mm) | Identical package and footprint enable drop-in replacement without PCB redesign. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +105°C | Industrial temperature range ensures reliable operation in harsh environments. |
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 | AD4115BCPZ | AD4111BCPZ-RL7 |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | AD4115 | - |
| Number of Bits | 24 | 24 |
| Sampling Rate (Per Second) | 125k | - |
| Number of Inputs | 8, 16 | 4, 8 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | DSP, MICROWIRE™, QSPI™, and SPI™ | Serial, SPI |
| Configuration | MUX-ADC | MUX-S/H-ADC |
| Ratio - S / H: ADC | 0:1 | 0:1 |
| Number of A / D Converters | 1 | - |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 4.5V ~ 5.5V | 2V ~ 5.5V |
| Voltage - Supply, Digital | 2V ~ 5.5V | 2V ~ 5.5V |
| Features | Temperature Sensor | Internal Oscillator, Temperature Sensor |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
| Mounting Type | Surface Mount | - |
| Packaging | Tray | - |
| Sampling Rate(Per Second) | - | 6.2k |
| Number of A/D Converters | - | 1 |
Frequently asked questions
What are the primary differences between the AD4111BCPZ-RL7 and the AD4115BCPZ?
The AD4111BCPZ-RL7 is a 24-bit, 8-channel, single-ended/differential, sigma-delta ADC with ±10 V and 0-10 V inputs, while the AD4115BCPZ is a 24-bit, 8-channel, single-ended/differential, sigma-delta ADC with ±10 V inputs only. The AD4111BCPZ-RL7 includes additional features such as open-wire detection and a voltage reference, whereas the AD4115BCPZ does not include open-wire detection.
Are the AD4111BCPZ-RL7 and AD4115BCPZ pin-compatible?
No, they are not pin-compatible. The AD4111BCPZ-RL7 is available in a 40-lead LFCSP (6 mm × 6 mm) package, while the AD4115BCPZ is available in a 40-lead LFCSP (6 mm × 6 mm) package, but the pin functions differ due to the additional features of the AD4111BCPZ-RL7. Always consult the respective datasheets for pin configurations.
Can the AD4111BCPZ-RL7 be used as a direct replacement for the AD4115BCPZ?
No, they are not direct replacements. The AD4111BCPZ-RL7 offers additional functionality such as open-wire detection and a voltage reference, which the AD4115BCPZ lacks. The input voltage ranges also differ: the AD4111BCPZ-RL7 supports ±10 V and 0-10 V, while the AD4115BCPZ supports only ±10 V. Design changes may be required.
What are the input voltage ranges for the AD4111BCPZ-RL7 and AD4115BCPZ?
The AD4111BCPZ-RL7 supports both ±10 V and 0-10 V input ranges. The AD4115BCPZ supports only ±10 V input ranges. Both devices are 24-bit sigma-delta ADCs with 8 channels.
Do both the AD4111BCPZ-RL7 and AD4115BCPZ include an internal voltage reference?
No. The AD4111BCPZ-RL7 includes an internal voltage reference, while the AD4115BCPZ does not. The AD4115BCPZ requires an external voltage reference for operation.
What is the package type for the AD4111BCPZ-RL7 and AD4115BCPZ?
Both the AD4111BCPZ-RL7 and AD4115BCPZ are offered in a 40-lead LFCSP (6 mm × 6 mm) package. However, the pin functions and internal features differ between the two devices.
Which device is better suited for applications requiring open-wire detection?
The AD4111BCPZ-RL7 is better suited for applications requiring open-wire detection, as it includes this feature. The AD4115BCPZ does not support open-wire detection.
What is the resolution and channel count for both the AD4111BCPZ-RL7 and AD4115BCPZ?
Both the AD4111BCPZ-RL7 and AD4115BCPZ are 24-bit sigma-delta ADCs with 8 channels. They support both single-ended and differential input configurations.