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SPT7883SIR
10-bit, 70 MSPS ADC
Features 2.5V power supply SNR: 59.5dB @ ƒIN = 10MHz, ƒS = 70 MSPS;
57dB @ ƒIN = 30MHz Low power dissipation: 129mW @ 2.5V;
Sleep mode: 17mW Sample rate: 10–115 MSPS Frequency-dependent biasing Internal sample-and-hold
•Differential input Low input capacitance
•9.5 ENOBs @ ƒIN = 10MHz, ƒS = 70 MSPS SFDR: 77.5dB
Applications Imaging Computer scanners Communications Set top boxes
•Video products Battery-operated equipment Portable test equipment
DescriptionThe SPT7883 is a compact, high-speed, low-power 10-bit
monolithic analog-to-digital converter, implemented in a 0.25µm
CMOS process. It has 10-bit resolution with 9.5 effective bits
and spurious-free dynamic range (SFDR) of 77.5dB for 10MHz
input signals. The converter includes a high bandwidth
sample-and-hold. The full-scale range can be set between
±0.5V and ±1.5V . It operates from a single 2.5V supply. Its
low distortion and high dynamic range provide the performance
needed for demanding imaging, video, and communications
applications.
The bias current level for the ADC is automatically adjusted
based on the clock input frequency. Hence, the power
dissipation of the device is continuously optimized for the
operating frequency.
The SPT7883 has a pipelined architecture, resulting in low input
capacitance. Digital error correction of the 9 most significant
bits ensures good linearity for input frequencies approaching
Nyquist.
The SPT7883 is available in a 28-lead SSOP package over the
industrial temperature range (-40°C to +85°C).
SPT7883
10-bit, 70 MSPS A/D Converter
Block Diagram
