Part A
AD9203ARU
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7565 PCS
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD9203ARU is a functional replacement candidate for the AD9200ARSZ, sharing the same 10-bit resolution and 20 MSPS maximum sampling rate, but it is not a drop-in replacement. The AD9203ARU offers a wider supply range and lower power consumption, while the AD9200ARSZ provides a higher analog input bandwidth. Designers must validate the supply voltage, package footprint, and input drive requirements before substituting.
Resolution and Sampling Rate
High match
Supply Voltage Range
Validation required
Package Type
Not compatible
Analog Input Bandwidth
Validation required
Parts at a glance
Part B
AD9200ARSZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3768 PCS
- Package
- SSOP-28
- Series
- Data Acquisition - 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 | AD9200ARSZ | AD9203ARU | Why it matters |
|---|---|---|---|
| Resolution | 10 bit | 10 bit | Both converters provide 10-bit resolution, so quantization noise and dynamic range are comparable for a given input span. |
| Sampling Rate | 20 MSPS | 40 MSPS | The AD9203 supports roughly twice the maximum sample rate, enabling wider signal bandwidth or higher oversampling in the application. |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 3.6 V | The AD9200 tolerates a wider supply range including 5 V, while the AD9203 is limited to 3.6 V, affecting system power rail compatibility. |
| Analog Input Range | 1 V p-p to 2 V p-p (programmable) | 1 V p-p to 2 V p-p (programmable) | Both offer a programmable input span, allowing the designer to trade off noise performance against headroom for the driving amplifier. |
| Package | 28-lead SSOP | 28-lead TSSOP | Different package footprints and thermal characteristics mean the PCB layout and assembly must be redesigned when substituting one for the other. |
| Power Consumption | Approximately 100 mW at 3 V | Approximately 100 mW at 3 V | Similar power draw means thermal and supply budgeting remain largely unchanged between the two parts. |
| SNR | Approximately 57 dB (at 20 MSPS) | Approximately 57 dB (at 40 MSPS) | Comparable signal-to-noise ratio indicates similar effective dynamic range for the same input signal conditions. |
| Output Interface | Parallel CMOS | Parallel CMOS | Both use a parallel CMOS output bus, so the digital interface to the downstream FPGA or DSP is functionally similar. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ratings mean both parts suit the same environmental conditions without derating. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9203ARU | AD9200ARSZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Base Product Number | AD9203 | - |
| Number of Bits | 10 | 10 |
| Sampling Rate (Per Second) | 40M | - |
| Number of Inputs | 1 | 1 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| 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 | - |
| Architecture | Pipelined | Pipelined |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 2.7V ~ 3.6V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 3.6V | 2.7V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | - |
| Packaging | Tube | - |
| Sampling Rate(Per Second) | - | 20M |
| Number of A/D Converters | - | 1 |
Frequently asked questions
What are the key differences between the AD9200ARSZ and AD9203ARU?
The AD9200ARSZ is a 10-bit, 20 MSPS analog-to-digital converter in a 28-lead SSOP package, while the AD9203ARU is a 10-bit, 40 MSPS ADC in a 28-lead TSSOP package. The AD9203ARU offers a higher maximum sampling rate and a different package footprint, so they are not drop-in replacements for each other.
Are the AD9200ARSZ and AD9203ARU pin-compatible?
No. The AD9200ARSZ uses a 28-lead SSOP (RS-28) package, and the AD9203ARU uses a 28-lead TSSOP (RU-28) package. The package body dimensions and lead pitch differ, so the PCB land patterns are not interchangeable.
What is the maximum sampling rate of each device?
The AD9200ARSZ is specified for a maximum sampling rate of 20 MSPS. The AD9203ARU is specified for a maximum sampling rate of 40 MSPS, allowing it to support higher-bandwidth input signals.
Do both converters have the same resolution and input range?
Both are 10-bit ADCs. The AD9200ARSZ provides a differential input with a nominal 1 V peak-to-peak input range and an on-chip reference. The AD9203ARU also provides a differential input with a nominal 1 V peak-to-peak range and an on-chip reference. Designers should confirm the exact reference and input configuration against the respective datasheets for their application.
Can the AD9203ARU be used as a higher-speed replacement for the AD9200ARSZ?
Functionally the AD9203ARU offers a higher sampling rate, but it is not a drop-in replacement because the package and PCB footprint differ. A redesign of the board layout and validation of the clock, input, and output timing against the AD9203ARU datasheet is required.
What supply voltage do these ADCs require?
Both the AD9200ARSZ and AD9203ARU operate from a single 3 V analog supply, with separate digital output supply pins that allow interfacing to 2.5 V or 3 V logic. Refer to the respective datasheets for the exact recommended supply ranges and decoupling requirements.
Which device should be selected for a 40 MSPS application?
The AD9203ARU should be selected for applications requiring up to 40 MSPS, since the AD9200ARSZ is limited to 20 MSPS. The AD9203ARU also provides the same 10-bit resolution, making it suitable for higher-speed signal chains where the AD9200ARSZ would be undersampled.