Part A
AD976ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1637 PCS
- Package
- SOIC-28
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The AD976ARZ and AD9760ARRL are not drop-in replacements for one another. Although both are 10-bit analog-to-digital converters, they differ in resolution architecture, sampling rate, package footprint, and pin configuration, so a direct board-level substitution is not possible without redesign.
Different sampling rate
Different package footprint
Different pin configuration
Different input architecture
Parts at a glance
Part B
AD9760ARRL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3702 PCS
- Package
- SOIC-28
- Series
- Data Acquisition - Digital to Analog Converters (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 | AD976ARZ | AD9760ARRL | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 10 bit | Resolution determines the number of discrete output levels; a 16-bit DAC offers far finer granularity 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 alone does not differentiate them 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 host-side digital connection scheme is compatible between the two parts. |
| Supply Voltage | ±5 V (analog), 5 V (digital) | 2.7 V to 5.5 V | Differing supply requirements affect power rail design; the AD976ARZ needs bipolar analog rails while the AD9760ARRL operates from a single low-voltage supply. |
| Settling Time | 35 ns | 35 ns | Similar settling times indicate comparable dynamic response, an important factor when evaluating speed-related substitutability. |
| Operating Temperature Range | -40°C to 85°C | -40°C to 85°C | Matching industrial temperature ranges mean both parts suit the same environmental conditions. |
| Package / Mounting Type | 28-SOIC (Surface Mount) | 28-SOIC (Surface Mount) | Identical package and mounting style allow either part to fit the same PCB footprint, easing physical substitution. |
| Reference Type | External | External | Both require an external voltage reference, so reference circuitry design considerations are shared between the two parts. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD976ARZ | AD9760ARRL |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Series | - | TxDAC® |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | - |
| Sampling Rate(Per Second) | 100k | - |
| Number of Inputs | 1 | - |
| Input Type | Single Ended | - |
| Data Interface | Parallel | - |
| Configuration | S/H-ADC | - |
| Ratio - S / H: ADC | 1:1 | - |
| Number of A/D Converters | 1 | - |
| Architecture | SAR | - |
| Reference Type | External, Internal | - |
| Voltage - Supply, Analog | 5V | - |
| Voltage - Supply, Digital | 5V | - |
| Operating Temperature | -40°C ~ 85°C | - |
Frequently asked questions
Are the AD976ARZ and AD9760ARRL interchangeable in an existing design?
No. The AD976ARZ is a 16-bit, 100 kSPS parallel-output ADC in a 28-lead SOIC package, while the AD9760ARRL is a 10-bit, 125 MSPS high-speed ADC in a 28-lead SSOP package. They differ in resolution, sample rate, output interface, package footprint, and analog front-end requirements, so they are not pin-compatible or functionally interchangeable.
What are the key resolution and sampling-rate differences between the AD976ARZ and AD9760ARRL?
The AD976ARZ provides 16-bit resolution at a maximum throughput of 100 kSPS. The AD9760ARRL provides 10-bit resolution at a maximum conversion rate of 125 MSPS. The AD9760ARRL is intended for high-speed signal processing, while the AD976ARZ targets precision, lower-speed measurement applications.
Do the AD976ARZ and AD9760ARRL use the same digital output format?
No. The AD976ARZ provides a parallel 16-bit CMOS-compatible output word. The AD9760ARRL provides a 10-bit parallel output intended for high-speed capture, with timing and load characteristics specified for its 125 MSPS operation. The bus width and output timing are therefore not compatible without redesign.
Are the package and pinout of the AD976ARZ and AD9760ARRL compatible?
No. The AD976ARZ is supplied in a 28-lead SOIC package, and the AD9760ARRL is supplied in a 28-lead SSOP package. The package body dimensions, lead pitch, and PCB land patterns differ, so one part cannot be soldered directly in place of the other.
Which part is better suited for high-speed digitization, and which for precision measurement?
The AD9760ARRL, with 10-bit resolution at up to 125 MSPS, is suited to high-speed digitization such as communications and instrumentation front ends. The AD976ARZ, with 16-bit resolution at up to 100 kSPS, is suited to precision, lower-bandwidth measurement and data-acquisition applications.
Can the AD9760ARRL be used as a drop-in upgrade for the AD976ARZ to increase speed?
No. Replacing the AD976ARZ with the AD9760ARRL would reduce resolution from 16 bits to 10 bits, change the package from SOIC to SSOP, and require a different clock, analog input drive, and digital capture interface. It is not a drop-in upgrade and requires a full design review.
Do both parts operate from the same analog and digital supply voltages?
They should not be assumed to share supply requirements. The AD976ARZ and AD9760ARRL have separate datasheet supply specifications, and the designer must verify the analog and digital supply ranges, reference requirements, and power sequencing against the respective manufacturer datasheets before comparing or substituting them.