Part A
AD7243ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3805 PCS
- Package
- SOIC-16
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD7243ARZ and AD7243BR are functionally equivalent 12-bit voltage-output DACs in the same SOIC-16 package with identical pinout and reference architecture; the BR grade offers a tighter INL specification, making it a suitable drop-in candidate where the ARZ grade's linearity tolerance is acceptable or where improved accuracy is desired.
Resolution and DAC Architecture
High match
Package and Pinout
High match
Integral Nonlinearity Grade
Validation required
Supply and Reference Requirements
High match
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 | AD7243BR | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both parts share the same 12-bit resolution, so quantization step size is identical for either device. |
| Number of DAC Channels | 1 | 1 | Single-channel architecture means both are drop-in for one-output designs. |
| Output Type | Voltage (buffered) | Voltage (buffered) | Buffered voltage output allows direct drive of loads without external op-amps in either variant. |
| Supply Voltage | ±15 V (dual) | ±15 V (dual) | Identical dual-supply requirement ensures the same power rail design works for both. |
| Reference Type | Internal | Internal | On-chip reference eliminates external reference circuitry for both parts. |
| Interface | Serial (SPI-compatible) | Serial (SPI-compatible) | Same serial interface allows identical microcontroller firmware and wiring. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature grades mean equivalent environmental tolerance. |
| Package / Mounting | SOIC-16 (surface mount) | SOIC-16 (surface mount) | Same package and footprint enable direct board-level substitution. |
| INL (Integral Nonlinearity) | ±1 LSB (A grade) | ±0.5 LSB (B grade) | The B grade offers tighter linearity, which matters for higher-accuracy applications where the A grade may not suffice. |
| DNL (Differential Nonlinearity) | ±1 LSB (A grade) | ±0.5 LSB (B grade) | Better DNL in the B grade guarantees monotonicity margin and lower distortion in precision designs. |
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 | AD7243BR |
|---|---|---|
| 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 | 10µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | SPI | SPI |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | ±10.8V ~ 16.5V | ±10.8V ~ 16.5V |
| INL / DNL(LSB) | ±1 (Max), ±0.9 (Max) | ±0.5 (Max), ±0.9 (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 AD7243BR?
The AD7243ARZ and AD7243BR are both 12-bit voltage-output DACs from Analog Devices in a 16-lead SOIC package. The primary difference is the grade specification: the AD7243BR offers tighter guaranteed linearity and monotonicity over temperature compared to the AD7243ARZ. The BR grade is specified for 12-bit monotonicity and ±1 LSB INL, while the ARZ grade is specified for ±1 LSB INL with 12-bit monotonicity guaranteed over the operating temperature range but with wider DNL limits. Designers should consult the respective datasheet grade tables for exact limits.
Are the AD7243ARZ and AD7243BR pin-compatible and package-compatible?
Yes. Both devices are offered in the same 16-lead SOIC (R-16) package with identical pin functions, so they are pin-to-pin and package-compatible. This allows a board designed for one grade to accept the other without layout changes, provided the electrical grade requirements are met.
Can the AD7243ARZ be used as a drop-in replacement for the AD7243BR?
Physically and functionally, yes, since both share the same package and pinout. However, the AD7243BR is the higher-grade device with tighter guaranteed specifications. Replacing a BR with an ARZ may reduce guaranteed accuracy and temperature performance margins. Replacing an ARZ with a BR is generally acceptable if the design does not rely on the wider ARZ limits. Always verify against the target design's accuracy budget.
What is the resolution and output configuration of these DACs?
Both the AD7243ARZ and AD7243BR are 12-bit digital-to-analog converters with a voltage output. They integrate an output amplifier and reference, providing a buffered voltage output. The devices support unipolar and bipolar output ranges configurable via external components, as described in the Analog Devices AD7243 datasheet.
Do the AD7243ARZ and AD7243BR differ in operating temperature range?
Both grades are specified over the industrial temperature range of −40°C to +85°C. The grade suffix (A vs. B) denotes accuracy and linearity specifications rather than a different temperature range. Confirm the exact temperature limits in the Analog Devices AD7243 datasheet for the specific grade.
Which grade should be selected for higher-accuracy applications?
The AD7243BR should be selected for higher-accuracy applications because it carries tighter guaranteed linearity, monotonicity, and offset specifications than the AD7243ARZ. For cost-sensitive designs where the ARZ limits are sufficient, the AD7243ARZ is appropriate. Selection should be based on the error budget and the guaranteed limits published in the Analog Devices datasheet.
Are the AD7243ARZ and AD7243BR RoHS compliant?
The "Z" suffix in both part numbers indicates a RoHS-compliant, lead-free package finish per Analog Devices' ordering nomenclature. Both the AD7243ARZ and AD7243BR are therefore RoHS-compliant. Verify the current compliance status on the Analog Devices product page or an authorized distributor listing before finalizing a design.