Part A
AD7228ACR
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3193 個数
- Package
- SOIC-24
- Series
- データ取得 - デジタル/アナログコンバータ (DAC)
Replacement verdict
Not a drop-in replacement
The AD7228ACR and AD7224KR-1 are not functionally interchangeable. The AD7228ACR is an octal 8-bit voltage-output DAC, while the AD7224KR-1 is a single-channel 8-bit voltage-output DAC; the channel count, package footprint, and pinout differ fundamentally, so the AD7224KR-1 cannot directly replace the AD7228ACR in an existing design without significant board and architecture changes.
Different channel count
Different package and pinout
Different footprint
Different reference architecture
Parts at a glance
Part B
AD7224KR-1
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 9604 個数
- Package
- SOIC-20
- Series
- データ取得 - デジタル/アナログコンバータ (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 | AD7228ACR | AD7224KR-1 | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 8 | 1 | Determines how many independent analog outputs the device can drive; an 8-channel part cannot be substituted by a single-channel part in multi-output systems. |
| Resolution | 8 bits | 8 bits | Both provide 8-bit resolution, so quantization step size and achievable output granularity are equivalent. |
| Reference Input | External reference required | External reference required | Both need an external voltage reference, so the system must supply a stable reference for accurate conversion. |
| Output Voltage Range | 0 V to VREF (unipolar) | 0 V to VREF (unipolar) | Defines the analog output span; matching ranges allow similar signal-chain compatibility. |
| Digital Interface | Parallel (8-bit) input | Parallel (8-bit) input | Both use a parallel data bus, so the host controller interface style is compatible. |
| Package | 28-lead SOIC (R) | 20-lead SOIC (R) | Different package sizes and pin counts affect PCB footprint and layout; they are not drop-in replacements. |
| Supply Voltage | +12 V to +15 V (single) or ±12 V to ±15 V (dual) | +12 V to +15 V (single) or ±12 V to ±15 V (dual) | Both accept similar supply rails, allowing reuse of the same power design. |
| Operating Temperature Range | 0°C to +70°C (commercial) | 0°C to +70°C (commercial) | Matching temperature grades ensure both parts suit the same commercial environment. |
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 | AD7228ACR | AD7224KR-1 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Number of Bits | 8 | 8 |
| Number of D/A Converters | 8 | 1 |
| Settling Time | 5µs, 7µs | 20µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | Parallel | Parallel |
| Reference Type | External | External |
| Voltage - Supply, Analog | 10.8V ~ 16.5V, ±5V | 11.4V ~ 16.5V, ±5V |
| Voltage - Supply, Digital | 13.5V ~ 16.5V | 14.25V ~ 15.75V |
| INL / DNL(LSB) | ±0.5 (Max), ±1 (Max) | ±1 (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 AD7228ACR and AD7224KR-1?
The AD7228ACR is an octal 8-bit voltage-output DAC with eight on-chip output amplifiers, while the AD7224KR-1 is a single 8-bit voltage-output DAC with one on-chip output amplifier. The AD7228ACR is supplied in a 24-lead SOIC package, whereas the AD7224KR-1 is supplied in a 20-lead SOIC package.
Do the AD7228ACR and AD7224KR-1 have the same resolution and interface type?
Yes. Both devices are 8-bit voltage-output digital-to-analog converters with a parallel microprocessor-compatible interface, and both feature on-chip output amplifiers capable of driving a load to the supply rails.
Can the AD7228ACR and AD7224KR-1 operate from the same supply voltages?
Both devices operate from a single +12 V to +15 V supply for the DAC and output amplifier, and both require a separate VDD reference input. The AD7228ACR additionally provides a VSS negative supply pin for bipolar output swing, while the AD7224KR-1 does not include a VSS pin in its 20-lead package.
Are the AD7228ACR and AD7224KR-1 pin-compatible?
No. The AD7228ACR uses a 24-lead SOIC package with eight analog outputs and associated address/control pins, while the AD7224KR-1 uses a 20-lead SOIC package with a single analog output. The pin counts and pin functions differ, so they are not drop-in replacements.
What are the key AC and DC specifications of the AD7228ACR?
The AD7228ACR offers 8-bit resolution, a relative accuracy of ±1 LSB (A grade), a differential nonlinearity of ±1 LSB, and a typical settling time of 5 µs to ±1/2 LSB. It includes eight voltage-output amplifiers and operates from a +12 V to +15 V supply with a separate VSS for bipolar operation.
What are the key AC and DC specifications of the AD7224KR-1?
The AD7224KR-1 offers 8-bit resolution, a relative accuracy of ±1 LSB (K grade), a differential nonlinearity of ±1 LSB, and a typical settling time of 5 µs to ±1/2 LSB. It includes a single voltage-output amplifier and operates from a +12 V to +15 V supply.
Which device should be selected for an application requiring multiple DAC channels?
The AD7228ACR is the appropriate choice for multi-channel applications because it integrates eight 8-bit DACs with output amplifiers in a single 24-lead SOIC package, reducing board space and component count compared with using multiple single-channel AD7224KR-1 devices.
Are the AD7228ACR and AD7224KR-1 specified over the same temperature range?
Both devices are specified for the commercial temperature range of 0°C to +70°C, as indicated by their respective grade suffixes (A and K) in the standard commercial grade offerings from Analog Devices.