Part A
AD7392ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2297 Stückzahl
- Package
- SOIC-20
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Not a drop-in replacement
The AD7392ARZ and AD7397AR are both 12-bit voltage-output DACs from Analog Devices, but they differ in resolution architecture, interface timing, reference configuration, and package footprint, so they are not interchangeable in existing designs. The AD7392ARZ is a 12-bit parallel-input DAC in a 20-lead SOIC, while the AD7397AR is a 12-bit serial-input DAC in a 24-lead SOIC with a different reference and output amplifier arrangement. Engineers must validate interface, reference, and layout compatibility before considering any substitution.
Different digital interface
Different package footprint
Different reference configuration
Different output amplifier topology
Parts at a glance
Part B
AD7397AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8191 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 | AD7392ARZ | AD7397AR | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 10 bit | Resolution determines the number of discrete output levels; a 12-bit DAC provides 4x finer adjustment granularity than a 10-bit DAC, affecting precision of the analog output. |
| Number of DAC Channels | 1 | 2 | Channel count determines how many independent analog outputs are available; the dual-channel AD7397AR can drive two outputs while the single-channel AD7392AR drives one. |
| Digital Interface | Parallel | SPI / Serial (3-wire) | The interface type dictates microcontroller pin usage and firmware; a parallel interface needs a full data bus while a serial interface uses fewer pins, affecting board layout and host compatibility. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Both parts share the same supply range, so power rail compatibility is equivalent for either device in a given system. |
| Output Voltage Range | 0 V to VREF (rail-to-rail) | 0 V to VREF (rail-to-rail) | Output span relative to the reference determines the usable analog range; both provide rail-to-rail output swing referenced to VREF. |
| Package / Mounting | 20-Lead SOIC (surface mount) | 20-Lead SOIC (surface mount) | Package and footprint compatibility affects whether the parts are drop-in replacements on an existing PCB; both use the same 20-lead SOIC outline. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range defines the environments in which the device is guaranteed to meet specifications; identical ranges mean equivalent thermal suitability. |
| Settling Time | Typically ~5 µs to 0.01% FSR | Typically ~5 µs to 0.01% FSR | Settling time limits how fast the DAC output can update accurately; comparable settling supports similar dynamic performance in control loops. |
| Reference Input | External VREF | External VREF | Both require an external reference, so the accuracy and stability of the analog output depend on the same external reference design in either case. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7392ARZ | AD7397AR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | - |
| Number of D/A Converters | 1 | - |
| Settling Time | 70µs (Typ) | - |
| Output Type | Voltage - Buffered | - |
| Differential Output | No | - |
| Data Interface | Parallel | - |
| Reference Type | External | - |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | - |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | - |
| INL / DNL(LSB) | ±3 (Max), ±1 (Max) | - |
| Architecture | R-2R | - |
| Operating Temperature | -40°C ~ 85°C | - |
Frequently asked questions
What are the key differences between the AD7392ARZ and AD7397AR?
The AD7392ARZ is a 12-bit voltage-output digital-to-analog converter (DAC) in a 20-lead SOIC package, while the AD7397AR is a 10-bit voltage-output DAC in a 24-lead SOIC package. The AD7392 offers higher resolution (12-bit vs 10-bit), and the two devices differ in package pin count and corresponding pinout, so they are not drop-in replacements for each other.
Do the AD7392ARZ and AD7397AR have the same resolution?
No. The AD7392ARZ provides 12-bit resolution, whereas the AD7397AR provides 10-bit resolution. This difference affects the number of discrete output levels and the LSB size relative to the reference voltage.
Are the AD7392ARZ and AD7397AR pin-compatible?
No. The AD7392ARZ is supplied in a 20-lead SOIC package and the AD7397AR in a 24-lead SOIC package. Because the package pin counts and pinouts differ, they are not pin-compatible and cannot be interchanged on the same PCB land pattern without redesign.
What is the supply voltage range for these DACs?
Both the AD7392ARZ and AD7397AR are specified for single-supply operation over a 2.7 V to 5.5 V range, making them suitable for low-voltage, mixed-signal systems. Designers should confirm the exact supply and reference conditions against the respective manufacturer datasheets.
What digital interface do the AD7392ARZ and AD7397AR use?
Both devices use a serial digital interface for loading DAC data, allowing them to be driven by common microcontrollers and DSPs. The exact timing, word length, and control-signal behavior differ between the 12-bit AD7392ARZ and the 10-bit AD7397AR, so the interface timing must be verified per datasheet.
Can the AD7397AR be used as a direct substitute for the AD7392ARZ?
No. Although both are voltage-output serial DACs, the AD7397AR has lower resolution (10-bit vs 12-bit) and a different package (24-lead vs 20-lead SOIC). A direct substitution would require validating resolution, accuracy, pinout, and PCB layout against the target design requirements.
What are typical applications for the AD7392ARZ and AD7397AR?
Both parts are general-purpose voltage-output DACs suited to applications such as digital gain and offset adjustment, programmable voltage references, and control-loop trimming in industrial and instrumentation systems. Selection between them typically depends on required resolution, package size, and board layout constraints.