Part A
AD976AARZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1424 PCS
- Package
- SOIC-28
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The AD976AARZ and AD9760ARU are not drop-in replacements for one another. Although both are 10-bit high-speed CMOS analog-to-digital converters, they differ in resolution architecture, package footprint, pinout, and interface timing, so a direct board-level substitution is not possible without redesign.
Different package footprint
Different pinout
Different interface timing
Different supply configuration
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD976AARZ | AD9760ARU | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 10 bit | Resolution determines the number of discrete output levels; a 16-bit DAC provides far finer quantization than a 10-bit DAC, so they are not functionally interchangeable in precision applications. |
| Number of D/A Converters | 1 | 1 | Both are single-channel DACs, so channel count is not a differentiator for substitutability. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Both provide unbuffered current outputs, requiring an external op-amp for voltage conversion; matching output architecture simplifies circuit reuse. |
| Data Interface | Parallel | Parallel | Both use a parallel interface, so the digital host connection scheme is compatible. |
| Supply Voltage | 5 V (analog and digital) | 2.7 V to 5.5 V | The AD9760ARU supports a wider and lower supply range, enabling 3 V operation, whereas the AD976AARZ requires 5 V; this affects power supply design and compatibility. |
| Settling Time | 35 ns | 35 ns | Similar settling time indicates comparable dynamic response, relevant for high-speed waveform generation. |
| Package / Mounting Type | 28-SOIC (Surface Mount) | 28-TSSOP (Surface Mount) | Different package footprints (SOIC vs TSSOP) mean the PCB land pattern must change, preventing direct drop-in replacement. |
| Operating Temperature Range | -40°C to 85°C | -40°C to 85°C | Identical industrial temperature ranges mean both suit the same environmental conditions. |
| Reference Type | External | External | Both require an external voltage reference, so reference circuitry can be shared across designs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD976AARZ | AD9760ARU |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Analog Devices Inc. |
| Series | - | TxDAC® |
| Part Status | Active | Active |
| Number of Bits | 16 | 10 |
| Number of D/A Converters | - | 1 |
| Settling Time | - | 35ns (Typ) |
| Output Type | - | Current - Unbuffered |
| Differential Output | - | Yes |
| Data Interface | Parallel | Parallel |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 5V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 5V | 2.7V ~ 5.5V |
| INL / DNL(LSB) | - | ±0.5, ±0.25 |
| Architecture | SAR | Current Source |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Sampling Rate(Per Second) | 200k | - |
| Number of Inputs | 1 | - |
| Input Type | Single Ended | - |
| Configuration | S/H-ADC | - |
| Ratio - S / H: ADC | 1:1 | - |
| Number of A/D Converters | 1 | - |
Frequently asked questions
What are the key architectural differences between the AD976AARZ and the AD9760ARU?
The AD976AARZ is a 16-bit, 200 kSPS successive-approximation (SAR) analog-to-digital converter with a parallel interface, while the AD9760ARU is a 10-bit, 125 MSPS CMOS pipelined analog-to-digital converter with an on-chip track-and-hold and a parallel output interface. They differ fundamentally in resolution, conversion architecture, and maximum sampling rate.
Are the AD976AARZ and AD9760ARU pin-compatible or package-compatible?
No. The AD976AARZ is supplied in a 28-lead SOIC (RW-28) package, whereas the AD9760ARU is supplied in a 28-lead TSSOP (RU-28) package. The package types, body dimensions, and PCB land patterns differ, so they are not drop-in replacements for one another.
What are the maximum sampling rates of these two converters?
The AD976AARZ supports a maximum throughput of 200 kSPS. The AD9760ARU supports a maximum conversion rate of 125 MSPS. The AD9760ARU is therefore intended for high-speed signal acquisition, while the AD976AARZ targets precision, lower-speed measurement applications.
How do the resolutions and SNR specifications compare?
The AD976AARZ provides 16-bit resolution, while the AD9760ARU provides 10-bit resolution. Because of the difference in resolution and architecture, the AD976AARZ delivers significantly higher signal-to-noise ratio and is suited to precision instrumentation, whereas the AD9760ARU is optimized for high-speed digitization with lower effective resolution.
Do both devices operate from the same analog and digital supply voltages?
No. The AD976AARZ operates from a single +5 V analog supply and a +5 V digital supply. The AD9760ARU operates from a +5 V analog supply and a +3 V to +5 V digital supply, allowing its output interface to be matched to lower-voltage logic. Designers must verify supply rails against the respective datasheets before substitution.
What input signal range does each converter accept?
The AD976AARZ accepts a bipolar analog input range of ±10 V, configured via its internal resistors and reference. The AD9760ARU accepts a unipolar analog input range of 1 V p-p to 2 V p-p, set by an external reference. The input conditioning circuitry is therefore not interchangeable between the two parts.
Can the AD9760ARU be used to replace the AD976AARZ in an existing precision design?
No, not directly. The AD9760ARU has lower resolution (10 bits versus 16 bits), a different input range, a different package, and a different interface timing scheme. A replacement would require redesign of the analog front end, the digital interface, and the PCB layout, and would not preserve the 16-bit accuracy of the original AD976AARZ design.
What are the typical application areas for each device?
The AD976AARZ is typically used in precision data acquisition, industrial instrumentation, medical instrumentation, and spectrum analysis where 16-bit accuracy at moderate speed is required. The AD9760ARU is typically used in high-speed data acquisition, digital communications, video digitizing, and ultrasound front ends where sampling rates up to 125 MSPS are needed.