Part A
AD7226KRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6418 PCS
- Package
- SOIC-20
- Series
- Acquisição de dados - Convertedores digitais para analógicos (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD7226KRZ and AD7225LR are both quad 8-bit voltage-output DACs from Analog Devices, sharing a compatible functional architecture and similar package footprint, making the AD7225LR a viable functional replacement candidate for the AD7226KRZ in many designs. However, the AD7225LR offers a higher reference input range and improved linearity specifications, so engineers should validate reference drive, supply headroom, and timing margins before committing to a drop-in substitution.
Resolution and Channel Count
High match
Output Type
High match
Reference Input Range
Validation required
Package Type
Validation required
Parts at a glance
Part B
AD7225LR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7017 PCS
- Package
- SOIC-24
- Series
- Acquisição de dados - Convertedores digitais para analógicos (DAC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7226KRZ | AD7225LR | Why it matters |
|---|---|---|---|
| Number of DACs | 4 | 4 | Both are quad DACs, so channel count is functionally equivalent. |
| Resolution | 8-bit | 8-bit | Resolution determines the number of discrete output levels; both provide 256 steps. |
| DAC Architecture | R-2R voltage output | R-2R voltage output | Architecture affects settling behavior and output drive characteristics. |
| Output Voltage Range | 0 V to VREF (buffered) | 0 V to VREF (buffered) | Determines the analog output span available for the application. |
| Reference Input | External VREF | External VREF | Both require an external reference, affecting accuracy and system design. |
| Supply Voltage | +12 V to +15 V (single) or ±5 V (dual) | +12 V to +15 V (single) or ±5 V (dual) | Supply requirements must match the host system's available rails. |
| Interface | Parallel (8-bit) | Parallel (8-bit) | Interface type determines how the DAC connects to the microcontroller or bus. |
| Package | 28-lead SOIC (R-28) | 24-lead SOIC (R-24) | Different package footprints affect PCB layout and drop-in substitutability. |
| Operating Temperature Range | 0°C to +70°C (commercial) | -40°C to +85°C (industrial) | Temperature grade affects suitability for industrial versus commercial environments. |
| Integral Nonlinearity (INL) | ±1 LSB (K grade) | ±1/2 LSB (L grade) | INL specifies accuracy deviation from ideal; the L grade offers tighter linearity. |
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 | AD7226KRZ | AD7225LR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 8 | 8 |
| Number of D/A Converters | 4 | 4 |
| Settling Time | 4µs | 4µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | Parallel | Parallel |
| Reference Type | External | External |
| Voltage - Supply, Analog | 11.4V ~ 16.5V, -5V | 11.4V ~ 16.5V, -5V |
| Voltage - Supply, Digital | 14.25V ~ 15.75V | 14.25V ~ 15.75V |
| INL / DNL(LSB) | ±0.5 (Max), +1 (Max) | ±0.5 (Max), ±1 (Max) |
| Architecture | R-2R | R-2R |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the primary differences between the AD7226KRZ and the AD7225LR?
The AD7226KRZ is a quad 8-bit voltage-output digital-to-analog converter (DAC) with a 20-pin SOIC package, specified for operation over the commercial temperature range of 0°C to +70°C. The AD7225LR is a quad 8-bit voltage-output DAC with a 24-pin SOIC package, specified for the industrial temperature range of -40°C to +85°C. The AD7225LR additionally provides a separate reference input for each DAC, while the AD7226KRZ uses a single common reference input for all four DACs.
Are the AD7226KRZ and AD7225LR pin-compatible?
No. The AD7226KRZ is housed in a 20-pin SOIC package, whereas the AD7225LR is housed in a 24-pin SOIC package. The different pin counts and pin assignments prevent direct pin-to-pin substitution without PCB redesign.
How many DACs are integrated in each device?
Both the AD7226KRZ and the AD7225LR integrate four independent 8-bit voltage-output DACs on a single monolithic chip.
What is the resolution of the AD7226KRZ and AD7225LR?
Both devices provide 8-bit resolution, yielding 256 discrete output levels per DAC channel.
Do the AD7226KRZ and AD7225LR have separate reference inputs per DAC?
The AD7225LR provides a separate reference input for each of its four DACs, allowing independent full-scale setting per channel. The AD7226KRZ uses a single common reference input shared by all four DACs.
What are the operating temperature ranges for the AD7226KRZ and AD7225LR?
The AD7226KRZ is specified for the commercial temperature range of 0°C to +70°C. The AD7225LR is specified for the industrial temperature range of -40°C to +85°C.
What package types are used for the AD7226KRZ and AD7225LR?
The AD7226KRZ is supplied in a 20-pin SOIC package. The AD7225LR is supplied in a 24-pin SOIC package.
Can the AD7226KRZ be used as a drop-in replacement for the AD7225LR in an existing design?
No. Due to differences in package pin count (20-pin vs. 24-pin), pin assignments, reference architecture (single common reference vs. per-DAC references), and specified temperature range, the AD7226KRZ is not a drop-in replacement for the AD7225LR. Any substitution requires schematic and PCB layout changes plus validation against the target design requirements.