Part A
AD783JRZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 5584 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The AD783JRZ and AD7834BR are both quad 14-bit voltage-output DACs from Analog Devices sharing a compatible functional architecture, making the AD7834BR a viable replacement candidate for the AD783JRZ. However, the two devices differ in package type and specified operating temperature range, so the replacement should be validated against the target board layout and thermal requirements before adoption.
Resolution and DAC Architecture
High match
Output Type
High match
Package Type
Validation required
Operating Temperature Range
Validation required
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 | AD7834BR | Why it matters |
|---|---|---|---|
| Resolution (bits) | 12 | 14 | Resolution determines the smallest analog step the DAC can produce; a 14-bit part offers finer granularity than a 12-bit part, affecting precision-critical designs. |
| Number of DAC channels | 1 | 4 | Channel count defines how many independent analog outputs are available; a single-channel part cannot directly replace a quad-channel part in multi-output systems. |
| Output type | Voltage (unbuffered) | Voltage (buffered) | Buffered outputs can drive loads directly without external op-amps, while unbuffered outputs require external buffering, affecting board design and BOM. |
| Digital interface | Parallel | Serial (SPI-compatible) | The interface type must match the host controller; parallel and serial interfaces are not pin- or protocol-compatible, preventing direct substitution. |
| Supply voltage | ±12 V to ±15 V (dual) | +5 V (single) with internal reference | Supply requirements dictate power rail design; a dual-supply part cannot operate on a single 5 V rail, so the power architecture must be compatible. |
| Package type | 28-lead SOIC | 28-lead SOIC | Package footprint affects PCB layout; matching packages allow the same land pattern, though pinout differences still prevent drop-in replacement. |
| Operating temperature range | 0°C to +70°C (commercial) | -40°C to +85°C (industrial) | Temperature grade determines suitability for harsh environments; industrial-grade parts are required for wide-temperature applications. |
| Integral nonlinearity (INL) | ±1 LSB (max) | ±1 LSB (max) | INL specifies DAC accuracy deviation from an ideal transfer function; matching INL indicates comparable linearity performance. |
| Settling time | 5 µs (to ±1/2 LSB) | 10 µs (to ±1/2 LSB) | Settling time affects maximum update rate; faster settling enables higher-speed waveform generation and control loop bandwidth. |
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 | AD7834BR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | - | 14 |
| Number of D/A Converters | - | 4 |
| Settling Time | - | 10µs (Typ) |
| Output Type | - | Voltage - Buffered |
| Differential Output | - | No |
| Data Interface | - | SPI |
| Reference Type | - | External |
| Voltage - Supply, Analog | - | ±11.4V ~ 15.75V |
| Voltage - Supply, Digital | - | 5V |
| INL / DNL(LSB) | - | ±1 (Max), ±0.9 (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 AD7834BR functionally interchangeable?
No. The AD783JRZ is a single 14-bit voltage-output DAC in a 20-lead SOIC, while the AD7834BR is a quad 14-bit voltage-output DAC in a 28-lead SOIC. They differ in channel count, package, and pinout, so they are not drop-in replacements.
What is the resolution and architecture of each device?
Both are 14-bit voltage-output DACs. The AD783JRZ is a single-channel device, and the AD7834BR integrates four independent 14-bit DACs on one chip.
How do the package and pin count differ between the AD783JRZ and AD7834BR?
The AD783JRZ is supplied in a 20-lead SOIC (R-20 package), whereas the AD7834BR is supplied in a 28-lead SOIC (R-28 package). The different pin counts and land patterns prevent direct PCB substitution.
Do both parts support the same digital interface?
Both devices use a parallel digital interface for loading DAC data. However, because the AD7834BR contains four DAC channels, its data and address bus structure and control signals differ from the single-channel AD783JRZ, so interface wiring is not identical.
What are the supply voltage requirements for these DACs?
Both the AD783JRZ and AD7834BR operate from dual supplies with a +5 V digital supply and analog supplies of approximately ±12 V to ±15 V, consistent with the AD783 family datasheet specifications. Verify exact limits against the respective manufacturer datasheet before design.
Can the AD7834BR replace the AD783JRZ in an existing single-channel design?
Not directly. Although both are 14-bit voltage-output DACs, the AD7834BR has four channels, a 28-lead package, and a different pinout. A redesign of the PCB land pattern and interface logic would be required, and unused channels would need to be handled appropriately.
Which part should be selected for a multi-channel analog output application?
The AD7834BR is the appropriate choice when four independent 14-bit voltage outputs are needed in a single package, reducing board space and component count compared with using four single-channel AD783JRZ devices.