Part A
AD9747BCPZRL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2001 Stückzahl
- Package
- LFCSP-72
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9747BCPZRL and AD9743BCPZRL are functionally compatible dual-channel DACs sharing the same package, pinout, and resolution, but they differ in maximum sample rate and dynamic performance. The AD9747BCPZRL is the higher-speed variant, so the AD9743BCPZRL can serve as a drop-in substitute only where the reduced update rate and lower SFDR remain acceptable for the target application.
Maximum Sample Rate
Validation required
Package Type
High match
Resolution
High match
Dynamic Performance
Validation required
Parts at a glance
Part B
AD9743BCPZRL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7690 Stückzahl
- Package
- VFQFN-72
- Series
- Data Acquisition von 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 | AD9747BCPZRL | AD9743BCPZRL | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 10 bit | Resolution determines the number of discrete output levels; a 16-bit DAC offers far finer amplitude granularity than a 10-bit DAC, directly affecting signal fidelity and dynamic range. |
| Number of DAC Channels | 2 | 2 | Both are dual-channel DACs, so channel count is identical and does not affect substitutability. |
| Maximum Update Rate | 250 MSPS | 250 MSPS | Sample rate defines the maximum signal bandwidth the DAC can synthesize; identical rates mean comparable high-frequency capability. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Current-output DACs require an external I/V stage; matching output type ensures the same analog front-end design can be reused. |
| Supply Voltage | 1.8 V, 3.3 V | 1.8 V, 3.3 V | Supply requirements must match the surrounding power architecture; identical rails allow drop-in replacement without power redesign. |
| Package / Case | 72-VFQFN Exposed Pad, CSP | 72-VFQFN Exposed Pad, CSP | Package and footprint compatibility is essential for physical substitutability on an existing PCB. |
| Operating Temperature Range | -40°C to 85°C | -40°C to 85°C | Industrial temperature range matching ensures both parts meet the same environmental requirements. |
| Data Interface | Parallel LVDS | Parallel LVDS | The digital input interface must match the driving FPGA/ASIC; identical LVDS interfaces allow the same digital source to drive either part. |
| INL / DNL Linearity | ±4 LSB INL (typical) | ±0.5 LSB INL (typical) | Linearity specifications affect distortion performance; the 16-bit part's larger LSB-referenced INL reflects its finer resolution, so linearity must be evaluated in context of resolution. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9747BCPZRL | AD9743BCPZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Number of Bits | 16 | 10 |
| Number of D/A Converters | 2 | 2 |
| Output Type | Current - Unbuffered | Current - Unbuffered |
| Differential Output | Yes | Yes |
| Data Interface | Parallel | Parallel |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 3.13V ~ 3.47V | 3.13V ~ 3.47V |
| Voltage - Supply, Digital | 1.7V ~ 1.9V, 3.13V ~ 3.47V | 1.7V ~ 1.9V, 3.13V ~ 3.47V |
| INL / DNL(LSB) | ±4, ±2 | ±0.1, ±0.05 |
| Architecture | Quad-Switch | Quad-Switch |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD9747BCPZRL and AD9743BCPZRL?
The AD9747BCPZRL is a dual 16-bit, 250 MSPS digital-to-analog converter (DAC), while the AD9743BCPZRL is a dual 10-bit, 250 MSPS DAC. Both are members of the Analog Devices AD974x family, share the same 72-lead LFCSP (CP-72-2) package, and support the same 1.8 V to 3.3 V digital interface and 3.3 V analog supply. The primary difference is resolution: 16-bit (AD9747) versus 10-bit (AD9743), which affects INL/DNL, SNR, and SFDR performance.
Are the AD9747BCPZRL and AD9743BCPZRL pin-compatible?
Yes. Both devices are offered in the same 72-lead LFCSP (CP-72-2) package with an identical pinout, as documented in the Analog Devices AD9747/AD9746/AD9745/AD9744/AD9743/AD9742 datasheet (Rev. B). This allows a common PCB footprint, though the AD9747 provides higher resolution and therefore different performance specifications.
What is the maximum update rate and resolution of each device?
Both the AD9747BCPZRL and AD9743BCPZRL support a maximum DAC update rate of 250 MSPS. The AD9747BCPZRL provides 16-bit resolution per DAC channel, while the AD9743BCPZRL provides 10-bit resolution per DAC channel. Both are dual-channel DACs.
Do both parts support the same digital input interface and supply voltages?
Yes. Both devices use a parallel LVCMOS digital input interface with a supply range of 1.8 V to 3.3 V (DVDD), and an analog supply (AVDD) of 3.3 V. They also share the same on-chip 1.2 V reference and integrated 2x/4x/8x interpolation filters, as specified in the AD9747/AD9743 datasheet.
Can the AD9743BCPZRL be used as a drop-in replacement for the AD9747BCPZRL?
Because both parts are pin-compatible and share the same package and interface, the AD9743BCPZRL can be placed on a board designed for the AD9747BCPZRL. However, it is not a functional drop-in replacement: the AD9743 provides only 10-bit resolution versus 16-bit, resulting in lower SNR, SFDR, and INL/DNL performance. The design must be validated against the system's dynamic performance requirements before substitution.
How do the static accuracy specifications compare between the two parts?
Per the Analog Devices AD9747/AD9743 datasheet, the AD9747BCPZRL (16-bit) specifies typical INL of ±2.0 LSB and DNL of ±1.0 LSB, while the AD9743BCPZRL (10-bit) specifies typical INL of ±0.5 LSB and DNL of ±0.25 LSB. Note that LSB size differs between the two resolutions, so absolute accuracy in volts must be evaluated for the target application.
What are the typical power consumption figures for these DACs?
Both the AD9747BCPZRL and AD9743BCPZRL are specified with a typical total power consumption of approximately 350 mW at 250 MSPS with 3.3 V analog supply, per the AD9747/AD9743 datasheet. Power consumption scales with update rate and digital input activity, and both parts offer a power-down mode to reduce consumption when not in use.
What are the operating temperature ranges and packaging for both parts?
Both the AD9747BCPZRL and AD9743BCPZRL are specified for the industrial temperature range of −40 °C to +85 °C and are supplied in a 72-lead LFCSP (CP-72-2) package. The "RL" suffix indicates tape-and-reel packaging. Both are RoHS-compliant as documented by Analog Devices.