ADS5231/32/37 EVM User's Guide November 2007 Wireless Infrastructure - Radio SBAU111B
SBAU111B – May 2006 – Revised November 2007 Submit Documentation Feedback
Contents 1 Overview .................................................................................................................... 5 1.1 Purpose............................................................................................................ 5 1.2 EVM Basic Functions ............................................................................................ 5 ............................................................................................ 5 1.
List of Figures 1 2 3 4 5 6 Top Layer.................................................................................................................... Layer 2, Ground Plane .................................................................................................... Layer 3, Power Plane #1 .................................................................................................. Layer 4, Power Plane #2 .......................................................................................
User's Guide SBAU111B – May 2006 – Revised November 2007 ADS5231/32/37 EVM This preliminary user’s guide gives a general overview of the ADS5231/32/37 evaluation module (EVM), and provides a general description of the features and functions to be considered while using this module. 1 Overview 1.1 Purpose The ADS5231/32/37 EVM provides a platform for evaluating the ADS5231/32/37 dual, 12-bit, analog-to-digital converter (ADC) under various signal, reference, and supply conditions.
www.ti.com Circuit Description 1.4 ADS5231/32/37 EVM Operational Procedure The ADS5231/32/37 EVM provides a flexible means of evaluating the ADS5231/32/37 in a number of modes of operation. A basic setup procedure that can be used as a board confidence check is as follows: 1. Verify all jumper settings against the schematic jumper list in Table 1: 2. Connect supplies to the EVM as follows: • 3.3-V ADC output buffer supply to J17 and return to J18. • 3.3-V ADC analog supply to J11 and return to J10. 3.
www.ti.com Circuit Description 2.2.1 Analog Inputs The EVM can be configured to provide the ADC with either transformer-coupled or differential amplifier inputs from a single-ended source. The inputs are provided via SMA connectors J15 and J16 for transformer-coupled input, and J1, J2, J7, and J9 for differential amplifier input. To set up for one of these options, the EVM must be configured as follows: 1.
www.ti.com EVM Use With the TSW1100 2.2.5 Outputs The data outputs from the ADC are buffered using two Texas Instruments SN74AVC16244s. Output data headers J8 and J21 are standard 40-pin headers on a 100-mil grid, and allow easy connection to a logic analyzer or TSW1100. The connector pinout is listed in Table 2. Furthermore, five test points are provided. They are listed in Table 3. Table 2. Output Connectors J8 and J21 PIN NO.
www.ti.com Physical Description 3.2 Provide Power to the ADS5231/32/37 EVM Follow the steps in Section 1.4 and power on the ADS5231/32/37 EVM. 3.3 Providing Power to the TSW1100 Use either a wall-mount transformer that has an output rating of 12 VDC and 500 mA or a lab power supply that can supply 12 VDC. Connect the output to J8 and the return to J9. Texas Instruments recommends setting a current limit of 500 mA. Power on the TSW1100. 3.
www.ti.com Physical Description 4.1 PCB Layout The EVM is constructed on a 6-layer, 5.15-inch × 5.05-inch, 0.062-inch thick PCB using FR-4 material. The individual layers are shown in Figure 1 through Figure 6. Figure 1.
www.ti.com Physical Description Figure 2.
www.ti.com Physical Description Figure 3.
www.ti.com Physical Description Figure 4.
www.ti.com Physical Description Figure 5.
www.ti.com Physical Description Figure 6.
www.ti.com Parts List and Schematics 5 Parts List and Schematics Table 4 lists the parts used in constructing the EVM. The EVM schematics are appended at the end of this section. Table 4.
www.ti.com Parts List and Schematics Table 4. ADS5231/32/37 EVM Parts List (continued) Value QTY Part Number ADS5231, ADS5232, or ADS5237 1 ADS5231, ADS5232, or ADS5237 TI U1 THS4503 2 THS4503ID TI U2 U9 OPA2227UA 1 OPA2227UA TI U3 TPS79225 1 TPS79225 TI U4 SN74AVC16244 2 SN74AVC16244DGG TI U7 U10 Screw, machine, PH 4-40 × 3/8 4 PMS 440 0038 PH Building Fasteners Standoff, hex .
VDRV D C9 C6 C28 C5 .1uF .1uF .1uF .1uF + C26 10uF D VDRV 1 R10 W1 (1-2) INTERNAL R11 2 (2-3) EXTERNAL 2 R1 3 56.
1 2 3 4 5 6 R36 R82 J2 392 +VCC 54.9 AINA+ 7 U2 THS4503 5 4 3 2 383 3 C70 R28 1 D NC 8 5 + R45 (Note 1) R5 24.9 0 R43 (Note 1) R6 24.9 0 VOCM VOUT+ 1 C94 1 J1 AINA- 2 4 - R19 1 3 (2-3) INA -VCC 412 -VCC 5 4 3 2 R12 6 .01uF INA_ VOUT- 2 SJP1 D .1uF +VCC INPUT_CMLA 0 J15 AIN_A .1uF R35 T1 1 C 3 5 4 3 2 R74 4 INA_ 24.9 R70 49.9 C80 392 (Sh 1) INA_ C107 C 5 2 1 27pF (Note 1) R75 6 INA (Sh 1) INA 24.9 ADT1-1WT C95 .
D D U7 SN74AVC16244DGG 48 (Sh 1) DVA DVA 47 46 45 C 44 RP7 A1 A2 A3 A4 4 3 2 1 RA1 RA2 RA3 RA4 5 6 7 8 43 42 41 40 0 39 RP8 A5 A6 A7 A8 4 3 2 1 38 RA5 RA6 RA7 RA8 5 6 7 8 37 36 35 0 34 33 RP9 A9 A10 A11 A12 4 3 2 1 32 RA9 RA10 RA11 RA12 5 6 7 8 31 30 29 0 B 28 27 (Sh 1) A[1..12] A[1..
1 2 3 4 5 6 D D U10 SN74AVC16244DGG 48 DVB (Sh 1) DVB 47 46 45 C 44 RP10 B1 B2 B3 B4 4 3 2 1 RB1 RB2 RB3 RB4 5 6 7 8 43 42 41 40 0 39 RP11 B5 B6 B7 B8 4 3 2 1 38 RB5 RB6 RB7 RB8 5 6 7 8 37 36 35 0 34 33 RP12 B9 B10 B11 B12 4 3 2 1 32 RB9 RB10 RB11 RB12 5 6 7 8 31 30 29 0 B 28 27 (Sh 1) B[1..12] B[1..
1 2 3 4 5 6 Diff Amp Positive Supply (+5.0V) ADC Analog Supply (+3.3V) AVDD D RED FB1 J11 RED +VCC FB2 J14 +3.3VA-PS C21 C13 C27 + D + .1uF C75 C65 + C83 47uF C66 J12 + .1uF .1uF 47uF 10uF BLACK 10uF J10 BLACK Diff Amp Negative Supply (-5.0V) -VCC FB3 C19 C15 .1uF + RED C23 + J13 47uF 10uF FB4 (Note 1) C C TP3 TP4 TP1 ADC Driver Supply (+3.3V) ADC_BUFFER VDRV FB5 J17 RED C89 C81 + C87 C73 + .1uF .1uF 47uF 10uF J18 BLACK Buffer Supply (+3.
1 2 3 4 5 6 D D R16 3 4.99K R20 2 R23 5 7 100 10K 1K C46 6 C41 C51 1 + TP6 U3B OPA2227UA R17 10uF R13 R3 49.9 0.1% 0 (Note 1) R27 .1uF REFT (Sh 1) 2K .047uF C7 +VCC R15 C REFT C8 .1uF C .1uF (Note 1) 2K +VCC 10uF C53 2 5 TPS79225 R18 2 GND 2.2uF BYPASS 4 R21 R24 10K 1K EN 8 2K C56 1uF 3 C43 C34 .1uF 470pF R29 +2.5V C44 C48 + 3 1 2 -VCC .1uF 10uF C55 100 C42 C33 .1uF 470pF R34 .01uF 4.
www.ti.com Parts List and Schematics EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
www.ti.com Parts List and Schematics FCC Warning This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use.
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
