Please mention your resolution if it is 12bit I think you can try this
SOIC-8
12-bit ADC, SPI, single
579-MCP3208CIP
PDIP-16
12-bit ADC, SPI, 8-ch
579-MCP3208CISL
SOIC-16
12-bit ADC, SPI, 8-ch
579-MCP3304-CI/SL
SOIC-16
13-bit ADC, 4-ch
579-MCP3551-E/SN
SOIC-8
22-bit Delta-sigma, Single,
15sps, 50-60Hz Rej
579-MCP3202-CI/P
PDIP-8
12-bit ADC, SPI, Dual
579-MCP3202-CI/SN
SOIC-8
12-bit ADC, SPI, Dual
579-MCP3204-CI/P
PDIP-14
12-bit ADC, SPI, 4-Ch
579-MCP3204-CI/SL
SOIC-14
12-bit ADC, SPI, 4-Ch
579-MCP3021A5T
Good luck