Part A
AD4115BCPZ-RL7
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4071 ПКС
- Package
- VFQFN-40
- Series
- Сбор данных - аналогово-цифровые преобразователи (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD4111BCPZ and AD4115BCPZ-RL7 are both single-supply, 24-bit sigma-delta ADCs with integrated analog front ends in a 40-lead LFCSP package, sharing the same core architecture and SPI interface. However, they differ in input channel configuration and feature set, so the AD4115BCPZ-RL7 can serve as a functional replacement for the AD4111BCPZ only when the specific channel count and voltage/current input requirements of the target design are validated against the AD4115 configuration.
Resolution and Architecture
High match
Package Type
High match
Input Channel Configuration
Validation required
Analog Input Type Support
Validation required
Parts at a glance
Part B
AD4111BCPZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3288 ПКС
- Package
- VFQFN-40
- Series
- Сбор данных - аналогово-цифровые преобразователи (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 | AD4115BCPZ-RL7 | Why it matters |
|---|---|---|---|
| Number of Input Channels | 4 differential / 8 single-ended | 8 differential / 16 single-ended | Determines how many sensor signals can be measured simultaneously, directly affecting system channel density 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 Types Supported | Voltage and current inputs | Voltage inputs only | Current-input capability allows direct interfacing with 4-20 mA industrial sensors without external burden resistors, simplifying design. |
| Maximum Input Voltage Range | ±10 V | ±10 V | Defines the maximum signal amplitude the ADC can directly accept, impacting compatibility with industrial voltage-output sensors. |
| Current Input Range | ±20 mA | Not supported | The AD4111 can directly digitize 4-20 mA loop currents, while the AD4115 requires external signal conditioning for current loops. |
| Data Output Rate | Up to 31.25 kSPS | Up to 31.25 kSPS | Determines the maximum sampling speed, affecting the ability to capture fast-changing signals and overall system throughput. |
| Interface | SPI | SPI | SPI is a standard serial interface for connecting ADCs to microcontrollers, ensuring straightforward digital integration. |
| Supply Voltage (AVDD) | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Defines the required analog supply rail, affecting power supply design and compatibility with existing system voltages. |
| Package | 40-Lead LFCSP (6 mm x 6 mm) | 40-Lead LFCSP (6 mm x 6 mm) | Package footprint and thermal characteristics determine PCB layout compatibility and whether parts can be swapped without redesign. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +105°C | Specifies the ambient temperature range for reliable operation, critical for industrial and outdoor applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD4115BCPZ-RL7 | AD4111BCPZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 125k | 6.2k |
| 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 | 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 |
Frequently asked questions
What are the main differences between the AD4111BCPZ and the AD4115BCPZ-RL7?
The AD4111BCPZ is a 24-bit sigma-delta ADC with ±10 V and 0-10 V voltage inputs plus 4 differential/8 single-ended current inputs, while the AD4115BCPZ-RL7 is a 24-bit sigma-delta ADC with ±10 V voltage inputs and 8 differential/16 single-ended voltage inputs. The AD4111 includes current-channel capability, whereas the AD4115 provides more voltage input channels and is supplied in a 7-inch reel (RL7) packaging option.
Do the AD4111BCPZ and AD4115BCPZ-RL7 have the same package and pinout?
Both devices are offered in a 40-lead LFCSP (CP-40-9) package with the same 6 mm × 6 mm body size. However, pin functions differ because the AD4111 integrates current input pins while the AD4115 uses those pins for additional voltage inputs, so the pinouts are not identical.
Can the AD4111BCPZ and AD4115BCPZ-RL7 be used interchangeably in an existing design?
No. Although they share the same package footprint and resolution, their analog input structures differ: the AD4111 supports current inputs and voltage inputs, while the AD4115 supports only voltage inputs with a higher channel count. A direct substitution would require verifying the input configuration, channel count, and register map against the target design.
What is the maximum input voltage range for the AD4111BCPZ and AD4115BCPZ-RL7?
Both devices support ±10 V and 0 V to 10 V analog input ranges on their voltage input channels. The AD4111 additionally supports current input ranges of ±20 mA and 0 mA to 20 mA.
What is the resolution and output data rate of the AD4111BCPZ and AD4115BCPZ-RL7?
Both are 24-bit sigma-delta ADCs. The AD4111 offers output data rates from 1 SPS to 31.25 kSPS, and the AD4115 offers output data rates from 1 SPS to 31.25 kSPS, depending on filter configuration and channel selection.
What are the operating temperature ranges for the AD4111BCPZ and AD4115BCPZ-RL7?
Both devices are specified for operation over the industrial temperature range of −40°C to +105°C.
What supply voltages do the AD4111BCPZ and AD4115BCPZ-RL7 require?
Both devices operate from a single 3.3 V or 5 V AVDD supply for the analog core, with a separate 2.7 V to 5.5 V IOVDD for the digital interface. The AD4111 also requires an AVSS supply for its current input channels.
Are evaluation boards available for the AD4111BCPZ and AD4115BCPZ-RL7?
Yes. Analog Devices provides the EVAL-AD4111SDZ for the AD4111 and the EVAL-AD4115SDZ for the AD4115. These evaluation boards are separate and are not interchangeable because the devices have different input channel configurations.