Part A
AD9761ARSZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7536 Stückzahl
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Not a drop-in replacement
The AD9761ARSZ and AD976ARS are not drop-in replacements for one another. Although both are 10-bit CMOS analog-to-digital converters from Analog Devices, they differ in resolution architecture, sampling rate, package footprint, and supply configuration, so the AD9761ARSZ cannot be substituted directly for the AD976ARS without a full design review.
Different sampling rate
Different package footprint
Different supply configuration
Different input architecture
Parts at a glance
Part B
AD976ARS
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9032 Stückzahl
- Package
- SSOP-28
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD9761ARSZ | AD976ARS | Why it matters |
|---|---|---|---|
| Resolution | 10 bit | 16 bit | Resolution determines the number of discrete output levels; a 16-bit DAC provides far finer granularity than a 10-bit device, so they are not functionally interchangeable in precision applications. |
| Number of DAC Channels | 2 | 1 | Channel count defines how many independent analog outputs are available; a dual-channel part cannot directly replace a single-channel part in a single-output design without redesign. |
| Sampling / Update Rate | 40 MSPS | 100 kSPS | The maximum update rate sets the achievable signal bandwidth; the AD9761ARSZ is a high-speed converter while the AD976ARS is a low-speed precision part, making them suitable for very different applications. |
| Output Type | Current (differential) | Voltage | Current-output and voltage-output DACs require different external signal conditioning, so the output architecture directly affects circuit compatibility and substitutability. |
| Supply Voltage | 3.0 V to 5.5 V | ±5 V (dual supply) | Supply requirements determine power-rail compatibility; a single-supply low-voltage part cannot be dropped into a dual-supply ±5 V design without changes. |
| Interface | Parallel (dual 10-bit) | Parallel (16-bit) | The digital interface width and protocol must match the host controller; differing bus widths require different wiring and timing, affecting direct replacement. |
| Package | 28-Lead SSOP | 28-Lead SSOP | Package and pinout compatibility is essential for board-level substitution; matching packages simplify replacement but pin functions must still be verified. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range indicates environmental suitability; identical ranges mean both parts can serve the same operating environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9761ARSZ | AD976ARS |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 10 | 16 |
| Sampling Rate(Per Second) | - | 100k |
| Number of Inputs | - | 1 |
| Input Type | - | Single Ended |
| Data Interface | Parallel | Parallel |
| Configuration | - | S/H-ADC |
| Ratio - S / H: ADC | - | 1:1 |
| Number of A/D Converters | - | 1 |
| Architecture | Current Source | SAR |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 3V ~ 5.5V | 5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Series | TxDAC+® | - |
| Base Product Number | AD9761 | - |
| Number of D / A Converters | 2 | - |
| Settling Time | 35ns (Typ) | - |
| Output Type | Current - Unbuffered | - |
| Differential Output | Yes | - |
| INL / DNL (LSB) | ±0.7, ±0.5 | - |
| Mounting Type | Surface Mount | - |
| Packaging | Tube | - |
Frequently asked questions
What are the key differences between the AD9761ARSZ and the AD976ARS?
The AD9761ARSZ is a dual-channel, 10-bit, 40 MSPS analog-to-digital converter (ADC) with on-chip digital filters and a 20-bit output bus, while the AD976ARS is a single-channel, 16-bit, 100 kSPS ADC with a parallel 16-bit output interface. They differ in resolution, channel count, sample rate, output format, and package pinout, so they are not functionally interchangeable.
Are the AD9761ARSZ and AD976ARS pin-compatible?
No. The AD9761ARSZ is supplied in a 28-lead SSOP package, and the AD976ARS is supplied in a 28-lead SOIC package. Pin functions and PCB land patterns differ, so neither device can be dropped into the other's footprint without layout changes.
What is the maximum sample rate of each device?
The AD9761ARSZ supports a maximum conversion rate of 40 MSPS per channel, while the AD976ARS supports a maximum throughput of 100 kSPS. The AD9761ARSZ is therefore intended for higher-speed signal chains, whereas the AD976ARS targets precision, lower-speed applications.
What are the resolution and channel configurations of these ADCs?
The AD9761ARSZ provides two 10-bit ADC channels with digital filtering and decimation, delivering a 20-bit output word. The AD976ARS provides a single 16-bit ADC channel with a 16-bit parallel output. Resolution and channel count are not equivalent between the two parts.
Do the AD9761ARSZ and AD976ARS use the same output interface?
No. The AD9761ARSZ outputs data over a 20-bit bus derived from its dual 10-bit channels and on-chip filters, while the AD976ARS provides a 16-bit parallel output. System designers must adapt the digital interface and timing accordingly.
Can the AD976ARS be used as a substitute for the AD9761ARSZ in an existing design?
No. The two devices differ in resolution, channel count, sample rate, output format, and package, so a direct substitution is not possible. Any replacement requires a full review of the signal chain, digital interface, and PCB layout against the manufacturer datasheets.
What are the typical application targets for each device?
The AD9761ARSZ is suited to dual-channel, higher-speed signal processing such as communications receive paths and instrumentation requiring matched channels. The AD976ARS is suited to precision, single-channel data acquisition where 16-bit resolution at up to 100 kSPS is required. Application suitability should be confirmed against the respective datasheets.