This TM7705 A/D module is manufactured in China and sold as an AD7705 acquisition board with two 16-bit input channels. A 2.5V voltage reference is also on the board.

The TM7705 mimics the operation of the AD7705 and the TM7705 data-sheet, which is only available in Chinese, is similar to the AD7705 original.

Module

A1+ o                 VCC         o o  GND
A1- o                 CHIP SEL    o o  RESET
A2+ o                 DATA IN     o o  CLOCK
A2- o                 DATA READY  o o  DATA OUT
          TM7705 I.C.
          
RESET   HAS  10K PULL UP
A1-/A2- HAVE 0R  PULL DOWN

TM7705

       CLOCK     o    o GND
       MCLK IN   o    o VDD
       MCLK OUT  o    o DATA IN  / MOSI
       CHIP SEL  o    o DATA OUT / MISO
       RESET     o    o DATA READY
       A2+       o    o A2-
       A1+       o    o REF-
       A1-       o    o REF+

Raspberry Pi

         +---P1---+
         .        .
3V3      17      18 
MOSI     19      20 
MISO     21      22 
SCLK     23      24 CE0
GND      25      26 CE1
         +--------+
These are the relevant pins on the RPi for SPI.

AD7705 data-sheet
TM7705 data-sheet (chinese)