Part A
AD783JRZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5584 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Not a drop-in replacement
The AD783JRZ and AD7837AR-REEL are not drop-in replacements for one another. Although both are dual 12-bit multiplying DACs from Analog Devices, they differ in package type, pin count, and operating temperature range, requiring layout and thermal validation before any substitution.
Different package type
Different pin count
Different temperature range
Different mounting style
Parts at a glance
Part B
AD7837AR-REEL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 143 PCS
- Package
- SOIC-24
- Series
- Data Acquisition - 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 | AD783JRZ | AD7837AR-REEL | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 1 | 2 | Channel count determines how many independent analog outputs the system can drive; a single-channel part cannot directly replace a dual-channel part in multi-output designs. |
| Resolution | 12 bit | 12 bit | Resolution sets the smallest output step and achievable accuracy; matching resolution is essential for equivalent output fidelity. |
| Architecture | R-2R Ladder | R-2R Ladder | The DAC architecture affects settling behavior, linearity, and output characteristics; identical architecture supports similar dynamic performance. |
| Output Type | Voltage - Buffered | Voltage - Buffered | Buffered voltage outputs can drive loads directly without external op-amps, simplifying the analog output stage. |
| Supply Voltage | ±12 V to ±15 V (dual) | ±12 V to ±15 V (dual) | Supply requirements must match the board's available rails; a mismatch would require power redesign or level shifting. |
| Interface | Parallel | Parallel | The digital interface type determines pinout and host connection; a parallel interface requires matching bus width and control signals. |
| Package / Mounting | 28-SOIC (Surface Mount) | 24-SOIC (Surface Mount) | Package footprint and pin count must match the PCB layout; differing pin counts prevent direct drop-in substitution. |
| Operating Temperature Range | 0°C to +70°C | -40°C to +85°C | The temperature range determines suitability for commercial versus industrial environments; a narrower range may not meet application requirements. |
| Settling Time | 5 µs (typical) | 5 µs (typical) | Settling time limits the maximum update rate and dynamic accuracy; matching values preserve timing performance in the target system. |
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 | AD783JRZ | AD7837AR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | - | 12 |
| Number of D/A Converters | - | 2 |
| Settling Time | - | 5µs |
| Output Type | - | Voltage - Buffered |
| Differential Output | - | No |
| Data Interface | - | Parallel |
| Reference Type | - | External |
| Voltage - Supply, Analog | - | ±14.25V ~ 15.75V |
| INL / DNL(LSB) | - | ±1 (Max), ±1 (Max) |
| Architecture | - | R-2R |
| Operating Temperature | 0°C ~ 70°C | -40°C ~ 85°C |
| Amplifier Type | Sample and Hold | - |
| Number of Circuits | 1 | - |
| -3 dB Bandwidth | 15 MHz | - |
| Current - Input Bias | 100 nA | - |
| Supply Current | 9.5mA | - |
| Current - Output / Channel | 5 mA | - |
| Voltage - Supply Span(Min) | 9.5 V | - |
| Voltage - Supply Span(Max) | 10.5 V | - |
| Mounting Type | Surface Mount | - |
Frequently asked questions
Are the AD783JRZ and AD7837AR-REEL interchangeable in an existing design?
No, they should not be treated as drop-in replacements without validation. The AD783JRZ is a single 12-bit multiplying DAC in a 20-lead SOIC (R-20) package, while the AD7837AR-REEL is a dual 12-bit multiplying DAC in a 24-lead SOIC (R-24) package. The channel count and package footprint differ, so the PCB layout and circuit topology must be reviewed before substitution.
What is the difference in channel count between the AD783JRZ and AD7837AR-REEL?
The AD783JRZ contains one 12-bit multiplying DAC channel, whereas the AD7837AR-REEL contains two independent 12-bit multiplying DAC channels in a single package. Designs requiring two DAC outputs can use the AD7837AR-REEL to save board space, while single-channel designs may use the AD783JRZ.
Do the AD783JRZ and AD7837AR-REEL use the same package and pinout?
No. The AD783JRZ is supplied in a 20-lead SOIC (R-20) package, and the AD7837AR-REEL is supplied in a 24-lead SOIC (R-24) package. Because the package sizes and pin counts differ, the PCB land patterns and pin assignments are not identical, and a layout change is required when moving between them.
What is the resolution and DAC architecture of these two parts?
Both the AD783JRZ and AD7837AR-REEL are 12-bit multiplying digital-to-analog converters. Multiplying DACs allow the reference input to be a time-varying analog signal, enabling applications such as digital gain control and signal attenuation in addition to standard voltage output conversion.
What does the "J" grade and "R" package suffix indicate on the AD783JRZ?
In the AD783JRZ part number, "J" denotes the commercial temperature grade and "R" denotes the 20-lead SOIC package; the trailing "Z" indicates RoHS-compliant lead finish. The AD7837AR-REEL uses the "A" grade and "R" 24-lead SOIC package, supplied in tape-and-reel form for automated assembly.
Can the AD7837AR-REEL replace two AD783JRZ devices in a dual-channel design?
Functionally, the AD7837AR-REEL provides two 12-bit multiplying DAC channels in one package, which can replace two single-channel AD783JRZ devices in principle. However, the reference input configuration, digital interface timing, output amplifier requirements, and PCB footprint must be verified against the respective datasheets before implementing such a consolidation.
Which part is better suited for space-constrained multi-channel designs?
The AD7837AR-REEL is generally more space-efficient for multi-channel designs because it integrates two 12-bit multiplying DACs in a single 24-lead SOIC package, whereas implementing two channels with AD783JRZ devices requires two separate 20-lead SOIC packages and associated routing.
Are both parts RoHS compliant?
The AD783JRZ carries the "Z" suffix, which denotes RoHS-compliant lead finish per Analog Devices part-numbering convention. For the AD7837AR-REEL, RoHS status should be confirmed against the specific ordering code and the manufacturer's product declaration, since the base part number alone does not guarantee compliance.