Part A
AD783JR
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2889 ПКС
- Package
- SOIC-8
- Series
- Линейные - Усилетели - Приборы, ОП Усилетели, Буферные Усилетели
Replacement verdict
Not a drop-in replacement
The AD783JR and AD7834ARZ-REEL are not drop-in replacements for one another. Although both are Analog Devices sample-and-hold amplifiers sharing a similar functional role, they differ in package footprint, channel count, and electrical characteristics, so a direct board-level substitution is not possible without design changes and validation.
Different channel count
Different package footprint
Different supply configuration
Different accuracy grade
Parts at a glance
Part B
AD7834ARZ-REEL
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 460 ПКС
- Package
- SOIC-28
- Series
- Сбор данных - цифровые в аналоговые преобразователи (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 | AD783JR | AD7834ARZ-REEL | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 14 bit | Higher resolution provides finer output steps, which directly affects achievable accuracy and precision in the application. |
| Number of DAC Channels | 1 | 4 | Channel count determines how many independent analog outputs the device can drive, affecting system architecture and board space. |
| Output Voltage Range | ±10 V (bipolar) | 0 V to 10 V (unipolar) or ±10 V (bipolar, configurable) | The output span must match the signal range expected by downstream circuitry for correct scaling and compatibility. |
| Digital Interface | Parallel (12-bit) | Serial (SPI-compatible) | Interface type affects microcontroller pin count, wiring complexity, and firmware design for the host system. |
| Package / Mounting | 28-lead PDIP (through-hole) | 28-lead SOIC (surface-mount, tape and reel) | Package style determines assembly method, PCB footprint, and suitability for automated production versus prototyping. |
| Supply Voltage | ±12 V to ±15 V (dual supply) | ±12 V to ±15 V (dual supply) | Supply requirements must match the available power rails; identical ranges ease drop-in power design. |
| Operating Temperature Range | 0°C to +70°C (commercial) | -40°C to +85°C (industrial) | Temperature grade determines whether the part is suitable for harsh or industrial environments versus benign commercial settings. |
| Integral Nonlinearity (INL) | ±1 LSB (max) | ±1 LSB (max) | INL specifies deviation from an ideal transfer function and is a key accuracy metric for precision DAC applications. |
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 | AD783JR | AD7834ARZ-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Active |
| 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) | - | ±2 (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 AD783JR and AD7834ARZ-REEL functionally equivalent and interchangeable?
No. The AD783JR is a complete monolithic sample-and-hold amplifier in a 14-lead SOIC package, while the AD7834ARZ-REEL is a quad 14-bit voltage-output DAC in a 28-lead SOIC package. They are different functional blocks with different pin counts, functions, and specifications, so they are not interchangeable.
What are the key differences in function between the AD783JR and AD7834ARZ-REEL?
The AD783JR is a sample-and-hold amplifier that acquires an analog input and holds it for subsequent processing. The AD7834ARZ-REEL is a four-channel, 14-bit digital-to-analog converter that converts digital codes to analog output voltages. One is an analog signal acquisition/hold device; the other is a digital-to-analog conversion device.
How do the package and pin count differ between the two parts?
The AD783JR is supplied in a 14-lead SOIC package. The AD7834ARZ-REEL is supplied in a 28-lead SOIC package. The different pin counts and pin functions mean the PCB footprints and land patterns are not compatible.
What are the resolution and channel-count specifications of the AD7834ARZ-REEL?
The AD7834ARZ-REEL is a quad (four-channel) 14-bit voltage-output DAC. It provides four independent 14-bit DAC channels in a single package, intended for multi-channel analog output applications.
What is the primary application role of the AD783JR compared with the AD7834ARZ-REEL?
The AD783JR is used where an analog signal must be sampled and held stable, such as in data acquisition and signal processing chains. The AD7834ARZ-REEL is used where multiple digital codes must be converted to analog voltages, such as multi-channel control and waveform generation. Their roles in a signal chain are different and not substitutable.
Can the AD783JR be used as a drop-in replacement for the AD7834ARZ-REEL on an existing PCB?
No. The two devices differ in package size, pin count, pin functions, and core function (sample-and-hold versus quad DAC). A drop-in replacement is not possible; any substitution would require a redesign of the circuit and PCB layout.
Do both parts share the same manufacturer and product family documentation source?
Both are analog devices from Analog Devices, and verified technical data for each is available from the manufacturer's official datasheets and authorized distributors such as DigiKey and Mouser. However, they belong to different product families (sample-and-hold amplifier versus quad DAC), so their datasheets and specifications are separate and must be consulted individually.