Part A
AD7243ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3805 Stückzahl
- Package
- SOIC-16
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD7243ARZ and AD7245AAR-REEL are both 12-bit voltage-output DACs from Analog Devices in a 24-lead SOIC package, sharing a comparable digital interface and reference architecture, so the AD7245AAR-REEL can serve as a functional replacement candidate for the AD7243ARZ. However, the two parts differ in output voltage span configuration and reference setup, so the replacement is not a pin-for-pin drop-in and requires validation of the output range, reference, and settling behavior against the target design before adoption.
Resolution and DAC Architecture
High match
Package Type
High match
Output Voltage Range
Validation required
Reference Configuration
Validation required
Parts at a glance
Part B
AD7245AAR-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 736 Stückzahl
- Package
- SOIC-24
- Series
- Data Acquisition von Digital to Analog Converters (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 | AD7243ARZ | AD7245AAR-REEL | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both are 12-bit DACs, so quantization step size and achievable output precision are equivalent. |
| Number of DAC Channels | 1 | 1 | Single-channel architecture means both fit the same single-output signal path without channel-count mismatch. |
| Output Voltage Range | ±5 V (bipolar) or 0 to +10 V (unipolar), selectable | 0 to +10 V (unipolar) or ±5 V (bipolar), selectable | Both support unipolar and bipolar output spans, allowing direct substitution in systems requiring either output polarity. |
| Reference Type | Internal reference | Internal reference | An on-chip reference removes the need for an external reference, simplifying board design and reducing component count. |
| Digital Interface | Serial (SPI-compatible) | Parallel | The interface type differs fundamentally; a serial-to-parallel change requires different microcontroller wiring and firmware, so they are not drop-in substitutes. |
| Supply Voltage | ±15 V (dual supply) | ±15 V (dual supply) | Matching dual-supply requirements means the same power rails can be reused in an existing design. |
| Package / Mounting | 20-lead SOIC (surface mount) | 24-lead SOIC (surface mount) | Different package pin counts and footprints mean the PCB layout must be redesigned; they are not footprint-compatible. |
| Settling Time | 10 µs (to ±1/2 LSB) | 10 µs (to ±1/2 LSB) | Equivalent settling time means comparable dynamic response for control-loop and waveform-generation applications. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ratings allow use in the same environmental conditions. |
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 | AD7243ARZ | AD7245AAR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | DACPORT® | DACPORT® |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Number of D/A Converters | 1 | 1 |
| Settling Time | 10µs | 7µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | SPI | Parallel |
| Reference Type | External, Internal | Internal |
| Voltage - Supply, Analog | ±10.8V ~ 16.5V | ±10.8V ~ 16.5V |
| Voltage - Supply, Digital | - | 10.8V ~ 16.5V |
| INL / DNL(LSB) | ±1 (Max), ±0.9 (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 key differences between the AD7243ARZ and AD7245AAR-REEL?
The AD7243ARZ is a 12-bit voltage-output DAC with an internal reference and output amplifier, specified for operation over the commercial temperature range and supplied in a 16-lead SOIC package. The AD7245AAR-REEL is a 12-bit voltage-output DAC in a 24-lead SOIC package, supplied on tape and reel for automated assembly. Both are single-channel voltage-output DACs, but they differ in package, pinout, and reel packaging.
Are the AD7243ARZ and AD7245AAR-REEL pin-compatible?
No. The AD7243ARZ is housed in a 16-lead SOIC, while the AD7245AAR-REEL is housed in a 24-lead SOIC. The different package sizes and pin counts mean the two devices are not pin-compatible and cannot be interchanged on the same PCB footprint without layout changes.
Do both parts have the same resolution and output type?
Yes. Both the AD7243ARZ and AD7245AAR-REEL are 12-bit digital-to-analog converters with voltage output. Each integrates an output amplifier, so the analog output is a buffered voltage rather than a current output.
What is the significance of the "REEL" suffix on the AD7245AAR-REEL?
The "REEL" suffix indicates that the AD7245AAR-REEL is supplied in tape-and-reel packaging, which is intended for high-volume automated pick-and-place assembly. The AD7243ARZ is supplied in standard tube or tray packaging. The electrical function of the device is not changed by the reel packaging.
Can the AD7243ARZ be used as a drop-in replacement for the AD7245AAR-REEL?
No. Because the two devices use different packages (16-lead SOIC versus 24-lead SOIC) and therefore different pinouts, the AD7243ARZ cannot be used as a drop-in replacement for the AD7245AAR-REEL. Any substitution requires verification of package, pinout, reference, and timing specifications against the target design.
Do both devices include an internal voltage reference?
Yes. Both the AD7243ARZ and AD7245AAR-REEL integrate an internal voltage reference along with the DAC and output amplifier, reducing external component count. Designers should confirm the reference voltage and tolerance from the respective manufacturer datasheets before finalizing a design.
Which part should be selected for automated high-volume production?
The AD7245AAR-REEL is the more suitable choice for automated high-volume production because it is supplied in tape-and-reel packaging compatible with pick-and-place assembly equipment. The AD7243ARZ, supplied in standard packaging, is typically used for prototyping or lower-volume builds.