Part A
AD8113JSTZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5722 Stückzahl
- Package
- LQFP-100
- Series
- Schnittstelle für analoge Schalter für spezielle Zwecke
Replacement verdict
Not a drop-in replacement
The AD8113JSTZ and AD8111AST are not drop-in replacements for one another. The AD8113JSTZ is a 16×16 crosspoint switch, while the AD8111AST is an 8×8 crosspoint switch, so the two devices differ in channel count, package footprint, and switching matrix configuration. Board-level redesign and revalidation are required before substituting one for the other.
Different matrix size
Different channel count
Different package footprint
Different pin configuration
Parts at a glance
Part B
AD8111AST
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5677 Stückzahl
- Package
- LQFP-80
- Series
- Schnittstelle für analoge Schalter, Multiplexer, Demultiplexer
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8113JSTZ | AD8111AST | Why it matters |
|---|---|---|---|
| Function / Device Type | Audio/video crosspoint switch (16 x 16) | Audio/video crosspoint switch (16 x 16) | Both are 16x16 crosspoint switches, but they belong to different product families with different performance grades, so direct substitution requires checking the remaining parameters. |
| Package / Mounting | LQFP (ST suffix), surface mount | LQFP (ST suffix), surface mount | Package and footprint compatibility determine whether the part can be dropped onto an existing PCB without layout changes. |
| Number of Channels | 16 x 16 (256 crosspoints) | 16 x 16 (256 crosspoints) | Channel count defines the switching matrix size and must match the system's routing requirements. |
| Bandwidth (-3 dB) | ~60 MHz (typical, per datasheet) | ~100 MHz (typical, per datasheet) | Bandwidth limits the maximum signal frequency the switch can pass with acceptable attenuation, affecting video and high-speed signal fidelity. |
| Supply Voltage | ±5 V dual supply (typical) | ±5 V dual supply (typical) | Supply voltage compatibility ensures the part operates correctly within the existing power rail design. |
| On-Resistance / Channel Resistance | Low on-resistance (see datasheet) | Low on-resistance (see datasheet) | On-resistance affects signal attenuation and insertion loss through the switch matrix. |
| Control Interface | Parallel/serial digital control | Parallel/serial digital control | The control interface must match the host system's programming and addressing scheme for correct crosspoint configuration. |
| Operating Temperature Range | Industrial temperature range | Industrial temperature range | Temperature range determines suitability for the target environment and reliability under thermal stress. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8113JSTZ | AD8111AST |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Mounting Type | Surface Mount | Surface Mount |
| Applications | Audio, Video | - |
| Multiplexer / Demultiplexer Circuit | 16:16 | - |
| Number of Channels | 1 | - |
| Voltage - Supply, Dual (V±) | ±5V ~ 12V | - |
| -3 dB Bandwidth | 60MHz | - |
| Features | Buffered | - |
| Operating Temperature | 0°C ~ 70°C (TA) | - |
Frequently asked questions
What are the key differences between the AD8113JSTZ and the AD8111AST?
The AD8113JSTZ is a 16 × 16 crosspoint switch with a 60 MHz bandwidth and a 100 MHz 0.1 dB gain flatness, housed in a 100-lead LQFP package. The AD8111AST is a 16 × 8 crosspoint switch with a 100 MHz bandwidth and a 0.1 dB gain flatness of 50 MHz, housed in a 80-lead LQFP package. The AD8113JSTZ offers twice the output channels (16 vs. 8) and a higher gain flatness bandwidth, while the AD8111AST provides a smaller package and lower channel count.
Are the AD8113JSTZ and AD8111AST pin-compatible?
No. The AD8113JSTZ uses a 100-lead LQFP package, while the AD8111AST uses an 80-lead LQFP package. The different pin counts and package sizes mean they are not pin-compatible and cannot be directly substituted on the same PCB footprint.
What are the supply voltage requirements for these devices?
Both the AD8113JSTZ and AD8111AST operate from dual ±5 V supplies (or a single +5 V supply with appropriate configuration). The AD8113JSTZ specifies a supply range of ±4.5 V to ±5.5 V, and the AD8111AST specifies a similar ±4.5 V to ±5.5 V dual-supply range. Both devices are specified for operation over the industrial temperature range of −40°C to +85°C.
How do the bandwidth and gain flatness specifications compare?
The AD8113JSTZ has a −3 dB bandwidth of 60 MHz and a 0.1 dB gain flatness of 100 MHz. The AD8111AST has a −3 dB bandwidth of 100 MHz and a 0.1 dB gain flatness of 50 MHz. The AD8111AST offers higher small-signal bandwidth, while the AD8113JSTZ provides wider 0.1 dB gain flatness, which is important for applications requiring flat frequency response over a broad range.
What are the crosstalk and isolation performance figures for these crosspoint switches?
The AD8113JSTZ specifies crosstalk of −70 dB at 5 MHz and off-isolation of −90 dB at 5 MHz. The AD8111AST specifies crosstalk of −70 dB at 5 MHz and off-isolation of −85 dB at 5 MHz. Both devices provide excellent signal isolation, with the AD8113JSTZ offering slightly better off-isolation performance.
Can the AD8111AST be used as a drop-in replacement for the AD8113JSTZ in an existing design?
No. The AD8111AST has 8 outputs versus 16 outputs on the AD8113JSTZ, a different package (80-lead vs. 100-lead LQFP), and different pin assignments. A direct drop-in replacement is not possible; the design would require PCB re-layout and verification of the reduced output count against system requirements.
What are the typical applications for the AD8113JSTZ and AD8111AST?
Both devices are intended for professional video switching, RGB routing, and high-speed signal routing applications. The AD8113JSTZ, with its 16 × 16 matrix and 100 MHz 0.1 dB gain flatness, is suited for larger routing matrices requiring flat response, such as broadcast video routers. The AD8111AST, with its 16 × 8 matrix and 100 MHz bandwidth, is suited for smaller switching matrices where board space is constrained.
What is the output current drive capability of these crosspoint switches?
The AD8113JSTZ is specified to drive a 150 Ω load to ±2.5 V while operating on ±5 V supplies, delivering approximately 16.7 mA of output current. The AD8111AST is specified to drive a 150 Ω load to ±2.5 V as well, providing similar output drive capability. Both devices are capable of driving standard video loads directly.