  Realization of qubit gate sequences require coherent microwave control pulses
with programmable amplitude, duration, spacing and phase. We propose an SRAM
based arbitrary waveform generator for cryogenic control of spin qubits. We
demonstrate in this work, the cryogenic operation of a fully programmable radio
frequency arbitrary waveform generator in 14 nm FinFET technology. The waveform
sequence from a control processor can be stored in an SRAM memory array, which
can be programmed in real time. The waveform pattern is converted to microwave
pulses by a source-series-terminated digital to analog converter. The chip is
operational at 4 K, capable of generating an arbitrary envelope shape at the
desired carrier frequency. Total power consumption of the AWG is 40-140mW at 4
K, depending upon the baud rate. A wide signal band of 1-17 GHz is measured at
4 K, while multiple qubit control can be achieved using frequency division
multiplexing at an average spurious free dynamic range of 40 dB. This work
paves the way to optimal qubit control and closed loop feedback control, which
is necessary to achieve low latency error mitigation
