ADC12D1800 Replacement: GX12D1800 Pin-to-Pin 12-Bit 1.8 GSPS ADC
GX12D1800 is a dual-channel, 12-bit, 1.8 GSPS high-speed ADC developed as a direct replacement for ADC12D1800 in RF sampling and wideband data acquisition systems.
Its compatible BGA292 package, 1.9 V power supply, differential input architecture, data-clock arrangement and parallel LVDS interface allow existing ADC12D1800 designs to migrate to GX12D1800 without changing the original schematic or PCB.
With 3.0 GHz full-power bandwidth, less than 2.4 W power consumption and an operating-temperature range of −55°C to +105°C, GX12D1800 supports demanding communication, radar, satellite, test and measurement, and electronic warfare applications.
GX12D1800 as a Direct ADC12D1800 Replacement
GX12D1800 integrates two independent 12-bit ADC channels, with each channel operating at sampling rates up to 1.8 GSPS.
For products currently using ADC12D1800, GX12D1800 provides a direct pin-to-pin migration path. The existing BGA292 footprint, differential analog inputs, sampling-clock connections, parallel LVDS buses and system architecture can be retained without redesigning the PCB.
The device combines high sampling speed with a 3.0 GHz full-power bandwidth, making it suitable for direct RF sampling and acquisition of signals beyond the first Nyquist zone.
GX12D1800 can also be selected for new high-speed digitizers, broadband receivers and synchronized multichannel acquisition systems.
Pin-to-Pin Hardware Compatibility Without PCB Redesign
GX12D1800 is designed for pin-to-pin hardware compatibility with ADC12D1800. Its BGA292 package, power connections, analog inputs, clock signals, control functions and parallel LVDS outputs correspond to the existing device architecture.
This compatibility allows customers to retain the original:
l Schematic design
l PCB footprint and routing
l Differential analog input connections
l 1.9 V power-supply architecture
l Sampling-clock circuit
l DCLKI and DCLKQ connections
l Parallel LVDS data buses
l AutoSync interconnection
l FPGA or ASIC data-capture architecture
By avoiding a complete board redesign, GX12D1800 helps reduce migration time, engineering effort and replacement verification costs.
GX12D1800 vs ADC12D1800: Key Specification Comparison
|
Specification |
ADC12D1800 |
GX12D1800 |
|
Resolution |
12-bit |
12-bit |
|
ADC Channels |
2 |
2 |
|
Maximum Sampling Rate |
1.8 GSPS per Channel |
1.8 GSPS per Channel |
|
Input Type |
Buffered Differential |
Differential |
|
Full-Power Bandwidth |
2.8 GHz Typical |
3.0 GHz |
|
Supply Voltage |
1.9 V ± 0.1 V |
1.9 V ± 0.1 V |
|
Data Output Interface |
Parallel LVDS |
Parallel LVDS |
|
Data Clock Outputs |
Independent DCLKI and DCLKQ |
Independent DCLKI and DCLKQ |
|
DCLKI and DCLKQ Phase |
In Phase When Both Channels Are Active |
In Phase When Both Channels Are Active |
|
Non-Demux Mode |
Supported |
Supported |
|
1:2 Demux Mode |
Supported |
Supported |
|
Output Data Format |
Offset Binary / Two’s Complement |
Offset Binary / Two’s Complement |
|
Multi-Device Synchronization |
AutoSync |
AutoSync |
|
Conversion Latency |
Low-Latency Parallel Architecture |
Minimum 18 ns |
|
Power Consumption |
Approximately 4.4 W |
Less Than 2.4 W |
|
Operating Temperature Range |
−40°C to +85°C |
−55°C to +105°C |
|
Package |
BGA292 |
BGA292 |
|
Pin-to-Pin Compatible |
— |
Yes |
|
Schematic or PCB Changes Required |
— |
No |
GX12D1800 maintains the principal resolution, sampling rate, supply voltage, package, data interface and synchronization architecture required by ADC12D1800-based systems.
It also provides a 3.0 GHz full-power bandwidth, lower power consumption and a wider operating-temperature range for demanding high-speed applications.
Parallel LVDS Output and Data-Clock Architecture
GX12D1800 uses a parallel LVDS interface for low-latency data transfer to an FPGA or ASIC.
Each ADC channel provides an independent DDR data clock, DCLKI or DCLKQ. When both ADC channels are active, DCLKI and DCLKQ remain in phase. This allows the receiving system to capture data from both channels using one of the data clocks when required.
The data interface supports both Non-Demux and 1:2 Demux operation.
In Non-Demux mode, each channel outputs data through one 12-bit LVDS bus.
In 1:2 Demux mode, each channel outputs data through two 12-bit LVDS buses. The data rate of each bus is reduced by half, easing the bandwidth and timing requirements of the receiving FPGA or ASIC.
The digital output format can be programmed as either offset binary or two’s complement, providing flexibility for different signal-processing architectures.
AutoSync Multi-ADC Synchronization and Applications
GX12D1800 supports AutoSync for multi-device synchronization and cascading.
The synchronization function can be used with multiple ADCs installed on the same board or across multiple boards. This enables aligned sampling and data output in systems requiring several synchronized acquisition channels.
Key GX12D1800 features include:
l Dual-channel 12-bit ADC
l Up to 1.8 GSPS per channel
l Differential analog inputs
l 3.0 GHz full-power bandwidth
l 1.9 V ± 0.1 V supply
l Parallel LVDS output
l Independent DDR data clocks
l In-phase DCLKI and DCLKQ operation
l Non-Demux and 1:2 Demux modes
l Offset-binary and two’s-complement output formats
l Minimum conversion latency of 18 ns
l AutoSync multi-device synchronization
l Single-board and cross-board ADC cascading
l Power consumption below 2.4 W
l −55°C to +105°C operating-temperature range
l Plastic BGA292 package
GX12D1800 is suitable for:
l RF direct downconversion and direct sampling
l High-speed data acquisition systems
l Ultra-wideband satellite data receivers
l Automatic test equipment
l High-speed test and measurement instruments
l Wideband radar systems
l Electronic warfare systems
l Synchronized multichannel digitizers
Request the GX12D1800 Datasheet, Samples and Technical Support
GXSC can provide the GX12D1800 datasheet, BGA292 pinout information, samples, quotations and technical support for ADC12D1800 replacement projects and new high-speed data acquisition designs.
Contact GXSC to discuss your ADC12D1800 replacement requirements or request GX12D1800 samples for evaluation and system testing.
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