Part A
AD7226KRZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6418 PCS
- Package
- SOIC-20
- Series
- Data Acquisition - Digital to Analog Converters (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
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.