TSA1204IFT STMicroelectronics, TSA1204IFT Datasheet
TSA1204IFT
Specifications of TSA1204IFT
TSA1204IFT
Available stocks
Related parts for TSA1204IFT
TSA1204IFT Summary of contents
Page 1
Dual channel 12-bit 20Msps 120mW A/D converter Features ■ 0.5 Msps to 20 Msps sampling frequency ■ Adaptive power consumption: 120 Msps, 95 mW@10 Msps ■ Single supply voltage: 2.5 V ■ Independent supply for CMOS output ...
Page 2
Contents Contents 1 Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 3
TSA1204 10 Definitions of specified parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Static parameters . . . . ...
Page 4
Schematic diagram 1 Schematic diagram Figure 1. TSA1204 block diagram VREFPI VREFPQ VREFMQ VINCMQ Figure 2. Timing diagram Simultaneous sampling on I/Q channels I N-1 Q CLK SELECT OEB sample N-8 I channel DATA OUTPUT sample N-9 sample N-7 I ...
Page 5
TSA1204 2 Pin descriptions Table 1. Pin descriptions (TQFP48 package) Pin Name 1 AGND Analog ground 2 INI I channel analog input 3 AGND Analog ground I channel inverted 4 INBI analog input 5 AGND Analog ground Analog bias current ...
Page 6
Dynamic characteristics 3 Dynamic characteristics Dynamic characteristics are measured =10.5 MHz specified). Table 2. Dynamic characteristics Symbol SFDR Spurious free dynamic range SNR Signal to noise ratio THD Total harmonics distortion SINAD Signal to ...
Page 7
TSA1204 5 Absolute maximum ratings Table 4. Absolute maximum ratings Symbol AV Analog supply voltage CC DV Digital supply voltage CC V Digital buffer supply voltage CCBE V Digital buffer supply voltage CCBI ID Digital output current out T Storage ...
Page 8
Electrical characteristics 7 Electrical characteristics Electrical characteristics are measured MHz dBFS specified). Table 6. Analog inputs Symbol Full scale reference INB voltage C Input capacitance in R ...
Page 9
TSA1204 Table 9. Power consumption Symbol I Analog supply current CCA I Digital supply current CCD I Digital buffer supply current (10 pF load) CCBE I Digital buffer supply current CCBI Power consumption in normal operation P d mode R ...
Page 10
Electrical characteristics Figure 3. Static parameter: integral non linearity F =20 MSPS CCA 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 0 Figure 4. Static parameter: differential non linearity F =20 MSPS CCA 0.4 0.3 ...
Page 11
TSA1204 Figure 5. Linearity vs =5MHz pol 100 ENOB Q 90 ENOB I 80 SINAD Q SNR SNR_I (MHz) Figure 7. Linearity vs ...
Page 12
Electrical characteristics Figure 11. Linearity vs =20Msps CCA 100 ENOB_Q 95 90 ENOB_I SNR_Q SINAD_Q 70 65 SINAD_I 60 SNR_I 55 50 2.25 2.35 2.45 AVCC (V) Figure 13. Linearity vs ...
Page 13
TSA1204 Figure 17. Linearity vs. V CCBE F =20Msps CCA 90 ENOB_I 85 80 ENOB_Q 75 SNR_I SINAD_I 70 65 SNR_Q 2.25 2.75 VCCBE (V) Figure 19. Linearity vs. duty cycle F =20Msps ...
Page 14
Electrical characteristics Figure 21. Single-tone 8K FFT at 20Msps - Channel I F =5MHz; I =40mA CCA 0 -20 -40 -60 -80 -100 -120 -140 Figure 22. Dual-tone 8K FFT at 20Msps - Channel I F =9.7MHz; F ...
Page 15
TSA1204 8 Application information The TSA1204 is a dual-channel, 12-bit resolution analog-to-digital converter based on a pipeline structure and the latest deep submicron CMOS process to achieve the best performance in terms of linearity and power consumption. Each channel achieves ...
Page 16
... Table 5: Operating conditions on page 7 voltages set the analog dynamic range at the input of the converter REFM -V REFP REFM -V REFP REFM voltage instead of lowering the V REFM Figure 24 with the STMicroelectronics TS821or TS4041-1.2 Vref. 1kΩ 330pF VCCA VREFP VIN TS821 TS4041 TSA1204 external VINB VREFM ...
Page 17
TSA1204 8.3 Driving the differential analog inputs The TSA1204 is designed to deliver optimum performance when driven on differential inputs transformer is an efficient way of achieving this high performance. Figure 25 describes the schematics. The input signal ...
Page 18
Application information Figure 27. DC-coupled 2 V Figure 27 shows a DC-coupled configuration with forced VREFP and INCM to the analog input while VREFM is connected to ground; the differential amplitude obtained ...
Page 19
TSA1204 Table 12. Total power consumption optimization depending (Msps kΩ) pol Optimized power (mW) 8.6 Layout precautions To use the ADC circuits most efficiently at high frequencies, some precautions have to be taken for ...
Page 20
Application information Note: The analog signal must be filtered to be very pure. The dataready signal is the acquisition clock of the logic analyzer. The ADC digital outputs are latched by the octal buffers 74LCX573. All characterization measurements are made ...
Page 21
TSA1204 Figure 30. TSA1204 evaluation board schematic VccB3 GndB3 VccB2 GndB2 VccB1 GndB1 INCM REFM REFP + D1 GNDBI 37 D0(LSB) DVCC 38 + VCCBE DGND 39 GNDBE SELECT 40 VCCBI CLK 41 VCCBI DGND CLKD 42 OEB DVCC 43 ...
Page 22
Application information 8.7.1 Evaluation board operating conditions Table 14 below shows the connections to the board for the power supplies and other pins. Table 14. Board connections for power supplies and other pins Board marking AV AG RPI RMI CMI ...
Page 23
TSA1204 8.7.4 Mode select In order to select the channel you want to evaluate, you must set a jumper on the board in the relevant position for the SELECT pin (see The channels selected depend on the position of the ...
Page 24
Practical application examples 9 Practical application examples 9.1 Digital interface applications The wide external buffer power supply range of the TSA1204 makes it a perfect choice for plugging into 2 3.3 V low voltage DSPs or digital interfaces. ...
Page 25
TSA1204 10 Definitions of specified parameters Static parameters Static measurements are performed using the histograms method MHz input signal, sampled at 50 Msps, which is high enough to fully characterize the test frequency response. The input level ...
Page 26
Definitions of specified parameters =6.02 × ENOB + 1. log (2A SINAD 2Ao The ENOB is expressed in bits. Analog input bandwidth The maximum analog input frequency at which the spectral response of a full power signal ...
Page 27
... JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics trademark. ECOPACK specifications are available at: www.st.com. Package mechanical data ...
Page 28
Package mechanical data Figure 33. Package mechanical data (48-pin plastic package) 12 Ref 28/ ...
Page 29
... TSA1204 12 Ordering information Table 15. Order codes Part number TSA1204IFT-E EVAL1204/BA Temperature Package range -40° +85° C TQFP48 Evaluation board Ordering information Packing Marking Tape & reel SA1204I 29/31 ...
Page 30
Revision history 13 Revision history Table 16. Document revision history Date 1-Apr-2004 2-May-2005 26-Sep-2006 12-Dec-2006 30/31 Revision 1 Initial release. Datasheet modified from Not for new Design to full production further 2 to new business demand. Editorial updates. Reorganized document ...
Page 31
... TSA1204 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...