TSA1203IF STMicroelectronics

D1 GNDBI D0(LSB) DVCC VCCBE DGND GNDBE SELECT VCCBI CLK VCCBI CLKD DGND OEB DVCC AVCC AVCC AVCC AGND INCMI INCMQ REFMI REFMQ REFPI REFPQ TSA1203 Dual-channel 12-bit 40Msps 215mW A/D converter Features Low power consumption: 215 mW 40 Msps Single supply voltage: 2.5 V 7x7mm TQFP48 Independent supply for CMOS output stage with 2.5 V/3.3 V capability index corner SFDR = -75 dBc F =10MHz in 48 47 46 45 44 43 42 41 40 39 38 37 D2 AGND 1 36 1GHz analog bandwidth track-and-hold D3 35 INI 2 3 D4 Common clocking between channels 34 AGND INIB 4 33 D5 Dual simultaneous sample and hold inputs AGND 5 32 D6 IPOL 6 31 D7 Multiplexed binary word outputs 7 30 D8 AVCCB TSA1203 Built-in reference voltage with external bias D9 AGND 8 29 INQ 9 D10 capability 28 D11(MSB) AGND 10 27 26 VCCBE INBQ 11 Description AGND 12 25 GNDBE 13 14 15 16 17 18 19 20 21 22 23 24 The TSA1203 is a new generation high-speed, dual-channel analog-to-digital converter implemented in a mainstream 0.25 m CMOS technology that offers high performance and very Applications low power consumption. Medical imaging and ultrasound The TSA1203 is specifically designed for applications requiring a very low noise floor, high 3G base station SFDR and good insulation between channels. It is I/Q signal processing applications based on a pipeline structure and digital error High-speed data acquisition systems correction to provide high static linearity at F = 40 Msps, and F =10MHz. S in Portable instrumentation Each channel has an integrated voltage reference to simplify the design and minimize external components. It is nevertheless possible to use the circuit with external references. The ADC binary word outputs are multiplexed in a common bus with a small number of pins. A tri-state capability is available for the outputs, allowing chip selection. The inputs of the ADC must be differentially driven. The TSA1203 is available in extended temperature range (-40 C to +85 C), in a small 48-pin TQFP package. December 2006 Rev 4 1/30 www.st.com 30Contents TSA1203 Contents 1 Schematic diagram 4 2 Pin descriptions 5 3 Dynamic characteristics 6 4 Timing characteristics . 6 5 Absolute maximum ratings . 7 6 Operating conditions 7 7 Electrical characteristics . 8 8 Application information . 15 8.1 Additional functions . 15 8.1.1 Output enable mode (OEB) 15 8.1.2 Select mode (SELECT) . 15 8.2 References and common mode connection . 16 8.2.1 Internal reference and common mode 16 8.2.2 External reference and common mode . 16 8.3 Driving the differential analog inputs 17 8.4 Clock input 18 8.5 Power consumption . 19 8.6 Layout precautions 19 8.7 EVAL1203/BA evaluation board 20 8.7.1 Evaluation board operating conditions 22 8.7.2 Consumption adjustment 23 8.7.3 Single and differential inputs . 23 8.7.4 Mode selection 23 9 Practical application examples . 24 9.1 Digital interface applications . 24 9.2 Medical imaging applications 24 2/30