Part A
AD783JR
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2889 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
Not a drop-in replacement
The AD783JR and AD7834BRZ-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 specified performance grades, so a direct board-level substitution is not supported without design validation.
Different channel count
Different package footprint
Different performance grade
Different supply configuration
Parts at a glance
Part B
AD7834BRZ-REEL
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4124 個数
- Package
- SOIC-28
- Series
- データ取得 - デジタル/アナログコンバータ (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 | AD7834BRZ-REEL | Why it matters |
|---|---|---|---|
| Resolution (bits) | 14 | 14 | Both are 14-bit DACs, so resolution is equivalent and not a differentiator for substitutability. |
| Number of DAC channels | 1 | 4 | Channel count determines how many independent analog outputs are available; a 4-channel part cannot directly replace a single-channel part in a one-output design. |
| Output voltage range | ±10 V (bipolar) | ±10 V (bipolar) | Matching output span ensures the DAC can drive the same analog signal range in the target circuit. |
| Digital interface | Parallel (12-bit + 2-bit) | Serial (SPI/QSPI compatible) | The interface type must match the host controller; parallel versus serial interfaces are not pin- or protocol-compatible. |
| Package / mounting | 28-lead SOIC (surface mount) | 28-lead SOIC (surface mount) | Package compatibility affects PCB footprint and assembly; identical packages simplify board-level substitution. |
| Supply voltage | ±12 V to ±15 V (dual) | ±12 V to ±15 V (dual) | Supply requirements must match the available rails in the system for the device to operate correctly. |
| Operating temperature range | 0°C to +70°C (commercial) | -40°C to +85°C (industrial) | Temperature grade determines suitability for the application environment; industrial grade covers a wider range than commercial. |
| Integral nonlinearity (INL) | ±1 LSB (max) | ±1 LSB (max) | INL defines DC accuracy; equivalent INL means comparable linearity performance in precision applications. |
| Settling time | 5 µs (to ±1/2 LSB) | 10 µs (to ±1/2 LSB) | Settling time affects achievable update rate; slower settling limits high-speed waveform generation or multiplexed output 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 | AD783JR | AD7834BRZ-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| 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) | - | ±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 AD783JR and AD7834BRZ-REEL interchangeable in an existing design?
No, they should not be treated as drop-in replacements. The AD783JR is a sample-and-hold amplifier in a 14-lead SOIC package, while the AD7834BRZ-REEL is a quad 14-bit voltage-output DAC in a 28-lead SOIC package. They differ in function, pin count, package footprint, and interface, so a direct substitution is not possible without a full design review.
What are the core functional differences between the AD783JR and the AD7834BRZ-REEL?
The AD783JR is a monolithic sample-and-hold amplifier intended to acquire and hold an analog input voltage. The AD7834BRZ-REEL is a quad 14-bit digital-to-analog converter with voltage outputs and a serial interface. One processes an analog signal for holding, while the other converts digital codes into analog output voltages.
Do the AD783JR and AD7834BRZ-REEL use the same package and pinout?
No. The AD783JR is supplied in a 14-lead SOIC package, and the AD7834BRZ-REEL is supplied in a 28-lead SOIC package. The pin counts and pin functions differ, so the PCB land patterns and connections are not compatible.
What supply and interface requirements distinguish the AD783JR from the AD7834BRZ-REEL?
The AD783JR is an analog sample-and-hold amplifier with analog input and output pins and does not require a digital serial interface for its core function. The AD7834BRZ-REEL is a digital-to-analog converter that requires a digital interface to load conversion data and provides four voltage outputs. Designers must verify the supply rails and digital interface timing from the respective datasheets before use.
Can the AD7834BRZ-REEL replace the AD783JR in a sample-and-hold circuit?
No. The AD7834BRZ-REEL is a quad DAC, not a sample-and-hold amplifier, so it does not provide the track-and-hold function of the AD783JR. Replacing a sample-and-hold amplifier with a DAC would change the circuit architecture and is not a valid substitution.
Which part should be selected for a multi-channel analog output application?
The AD7834BRZ-REEL is the appropriate choice for multi-channel analog output because it integrates four 14-bit voltage-output DACs in a single package. The AD783JR is a single sample-and-hold amplifier and does not provide multiple DAC output channels.
Are the AD783JR and AD7834BRZ-REEL available in reel packaging?
The AD7834BRZ-REEL is specified with a reel packaging suffix, indicating tape-and-reel delivery for automated assembly. The AD783JR designation does not include a reel suffix in the same way, so packaging and ordering quantities should be confirmed against the manufacturer's ordering guide before production planning.