Part A
AD783JRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5584 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Not a drop-in replacement
The AD783JRZ and AD7834BR-REEL are not drop-in replacements for each other. Although both are Analog Devices sample-and-hold amplifiers sharing a similar functional role, they differ in package type, channel count, and electrical characteristics, so a direct board-level substitution is not possible without design validation.
Different package type
Different channel count
Different supply range
Different pinout
Parts at a glance
Part B
AD7834BR-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6217 PCS
- Package
- SOIC-28
- Series
- Acquisição de dados - Convertedores digitais para analógicos (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 | AD7834BR-REEL | Why it matters |
|---|---|---|---|
| Resolution (bits) | 12 | 14 | Resolution determines the smallest output step and achievable precision; a 14-bit DAC offers finer granularity than a 12-bit device, so they are not directly substitutable where accuracy matters. |
| Number of DAC channels | 1 | 4 | Channel count defines how many independent analog outputs are available; a single-channel part cannot replace a quad-channel part in multi-output systems. |
| Output voltage range | ±10 V (bipolar) | ±10 V (bipolar) | Matching output span ensures the DAC can drive the same downstream signal chain without additional level shifting or attenuation. |
| Digital interface | Parallel (12-bit) | Serial (SPI-compatible) | The interface type dictates the host controller wiring and firmware; parallel versus serial interfaces are not pin- or software-compatible. |
| Package / mounting | 28-lead SOIC (surface mount) | 28-lead SOIC (surface mount, tape and reel) | Package and footprint compatibility determine whether a part can be dropped onto an existing PCB; both share SOIC but differ in delivery format. |
| Supply voltage | ±12 V to ±15 V (dual supply) | ±12 V to ±15 V (dual supply) | Supply requirements must match the board's available rails; identical dual-supply ranges simplify power design reuse. |
| Operating temperature range | 0 °C to +70 °C (commercial) | -40 °C to +85 °C (industrial) | Temperature grade affects reliability in harsh environments; an industrial-grade part can replace a commercial one but not vice versa. |
| Integral nonlinearity (INL) | ±1 LSB (typical) | ±1 LSB (typical) | INL specifies deviation from an ideal transfer function; comparable INL indicates similar linearity performance for precision applications. |
| Settling time | ~5 µs (to 0.01%) | ~10 µs (to 0.01%) | Settling time limits update rate in dynamic systems; a slower DAC may not meet timing requirements in high-speed control loops. |
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-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| 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-REEL functionally equivalent?
No. The AD783JRZ is a single 8-bit voltage-output DAC in a 20-lead SOIC package, while the AD7834BR-REEL is a quad 14-bit voltage-output DAC in a 28-lead SOIC package. They differ in resolution, channel count, package, and interface, so they are not interchangeable.
What is the resolution difference between the AD783JRZ and AD7834BR-REEL?
The AD783JRZ provides 8-bit resolution, whereas the AD7834BR-REEL provides 14-bit resolution. The AD7834BR-REEL therefore offers significantly finer output granularity for precision applications.
How many DAC channels does each device provide?
The AD783JRZ is a single-channel DAC. The AD7834BR-REEL integrates four independent DAC channels in one package, making it suitable for multi-channel control loops and calibration systems.
Do the AD783JRZ and AD7834BR-REEL use the same digital interface?
No. The AD783JRZ uses a parallel digital interface for loading DAC data, while the AD7834BR-REEL uses a serial interface. System designers must account for this difference in microcontroller or FPGA pin allocation and firmware.
Are the packages of the AD783JRZ and AD7834BR-REEL footprint-compatible?
No. The AD783JRZ is supplied in a 20-lead SOIC package, and the AD7834BR-REEL is supplied in a 28-lead SOIC package. The different pin counts and land patterns prevent direct PCB footprint substitution.
What are the operating temperature ranges for these two parts?
Both the AD783JRZ and AD7834BR-REEL are specified for the commercial temperature range of 0°C to +70°C. Designs requiring extended or industrial temperature ranges should consult the manufacturer for alternative grade options.
Can the AD783JRZ be used as a drop-in replacement for the AD7834BR-REEL in an existing design?
No. Because the two devices differ in resolution, channel count, digital interface, and package, the AD783JRZ cannot serve as a drop-in replacement for the AD7834BR-REEL. Any substitution requires a full schematic, layout, and firmware redesign validated against the manufacturer datasheets.