Part A
AD9057BRSZ-80
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2609 個数
- Package
- SSOP-20
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Not a drop-in replacement
The AD9057BRSZ-80 and AD9051BRS are both 8-bit analog-to-digital converters, but they differ in resolution-critical architecture, sampling rate, package footprint, and analog input configuration, so the AD9051BRS cannot serve as a direct drop-in substitute for the AD9057BRSZ-80 without design validation.
Different sampling rate
Different package footprint
Different analog input range
Different power 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 | AD9057BRSZ-80 | AD9051BRS | Why it matters |
|---|---|---|---|
| Resolution | 8 bit | 10 bit | Resolution determines the quantization granularity; a 10-bit ADC provides 4x finer levels than an 8-bit ADC, affecting dynamic range and SNR. |
| Sampling Rate | 80 MSPS | 60 MSPS | Maximum sampling rate limits the input signal bandwidth that can be digitized without aliasing; higher rates support wider-band signals. |
| Number of Input Channels | 1 | 1 | Single-channel architecture means both parts digitize one analog input, so channel count does not differentiate them functionally. |
| Supply Voltage | 5 V | 5 V | Both operate from a single 5 V supply, so power-rail compatibility is maintained when substituting one for the other. |
| Analog Input Type | Single-ended | Differential | Input topology affects the required front-end drive circuit; a differential input typically offers better common-mode rejection and noise immunity. |
| Package / Case | 20-SSOP | 28-SSOP | Different package footprints and pin counts mean the parts are not drop-in replacements on an existing PCB layout. |
| Output Interface | Parallel CMOS/TTL | Parallel CMOS/TTL | Both provide parallel digital outputs, so the digital interface to downstream logic is compatible in style, though bus width differs with resolution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ratings mean both are suitable for the same environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9057BRSZ-80 | AD9051BRS |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 8 | 10 |
| Sampling Rate(Per Second) | 80M | 60M |
| Number of Inputs | 1 | 1 |
| Input Type | Single Ended | Differential |
| Data Interface | Parallel | Parallel |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | Pipelined | Pipelined |
| Reference Type | Internal | Internal |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 5V | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD9057BRSZ-80 and the AD9051BRS?
The AD9057BRSZ-80 is an 8-bit, 80 MSPS analog-to-digital converter, while the AD9051BRS is a 10-bit, 60 MSPS ADC. The AD9057BRSZ-80 offers higher sampling speed with 8-bit resolution, whereas the AD9051BRS provides higher resolution (10-bit) at a lower maximum sampling rate of 60 MSPS.
Do the AD9057BRSZ-80 and AD9051BRS come in the same package?
Both devices are offered in a 28-lead SSOP (Shrink Small Outline Package). The AD9057BRSZ-80 uses the RS-28 SSOP package, and the AD9051BRS also uses a 28-lead SSOP, allowing similar PCB footprint considerations, though pin functions and external component requirements should be verified against each datasheet.
What is the maximum sampling rate of each device?
The AD9057BRSZ-80 has a maximum sampling rate of 80 MSPS. The AD9051BRS has a maximum sampling rate of 60 MSPS. The higher sampling rate of the AD9057BRSZ-80 makes it better suited for wider-bandwidth signal acquisition.
What resolution does each ADC provide?
The AD9057BRSZ-80 provides 8-bit resolution, yielding 256 output codes. The AD9051BRS provides 10-bit resolution, yielding 1024 output codes, which offers finer quantization and better dynamic range for applications requiring higher accuracy.
Are the AD9057BRSZ-80 and AD9051BRS pin-compatible?
They should not be assumed to be pin-compatible. Although both are 28-lead SSOP devices, the AD9057BRSZ-80 and AD9051BRS have different pin assignments and functions as defined in their respective datasheets. A direct drop-in replacement requires careful comparison of pin functions, supply connections, and output configurations.
What are the typical power supply requirements for these ADCs?
Both the AD9057BRSZ-80 and AD9051BRS operate from a single 5 V analog supply, with separate digital output supply pins that can be configured for interfacing to 3 V or 5 V logic systems, as specified in the Analog Devices datasheets. Designers should confirm exact supply and decoupling requirements from the official datasheets.
Which device is better for high-resolution instrumentation versus high-speed digitization?
For high-resolution instrumentation, the AD9051BRS with 10-bit resolution is preferable because it provides finer quantization. For high-speed digitization where sampling rate is the priority, the AD9057BRSZ-80 with 80 MSPS is preferable. The choice depends on whether resolution or sampling bandwidth is the dominant system requirement.
Can the AD9057BRSZ-80 be used as a replacement for the AD9051BRS in an existing design?
Not without design validation. The AD9057BRSZ-80 is 8-bit and 80 MSPS, while the AD9051BRS is 10-bit and 60 MSPS. Differences in resolution, sampling rate, pin functions, and output data format mean the replacement must be verified against the AD9057BRSZ-80 datasheet and the target system requirements before substitution.