Datasheet

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3 EVM Operation
3.1 Factory Default Settings
EVM Operation
Table 1. Parts List (continued)
Item Qty. Designators Description Manufacturer Mfg. Part Number
13 1 J6 10-PIN_IDC Samtec TSM-105-01-T-DV
14 2 J11, J12 3-Pin terminal connector
(1)
On-Shore Tech. ED555/3DS
15 4 J1B, P2, P4, P5 20-PIN_IDC
(2)
Samtec SSW-110-22-S-D-VS-P
10-PIN Isolated power socket,
16 1 P6 Samtec SSW-105-22-F-D-VS-K
0.100
(2)
17 3 TP1, TP2, TP4 Turret terminal pin Mill-Max 2348-2-01-00-00-07-0
QFN-40 (RTA), 12-bit analog
18 1 U1 Texas Instruments AMC7823IRTA
monitoring and control circuit
19 2 U2, U3 Single buffer/driver Texas Instruments SN74LVC1G07DBVR
20 1 U4 64-Kbit EEPROM Microchip Technology 24LC64-I/ST
21 1 REF1 1.25-V Reference Texas Instruments REF3112AIDBZT
22 1 REF2 2.5-V Reference Texas Instruments REF3125AIDBZT
23 1 J3 Terminal block 3,5 mm, 2-pos PCB On-Shore Tech. ED555/2DS
24 2 D1, D5 2.2-V, 45 mC LED, green Lumex SML-LX1206SUGC-TR
25 3 W5, W10, W11 2 Circuit header, 0.100 straight Molex 22-03-2021
W1, W2, W3, W4, W6,
26 8 3 Circuit header, 0.100 straight Molex 22-03-2031
W7, W8, W9
(2)
P2, P4, and P6 parts are not shown in the schematic diagram. All P designated parts are installed in the bottom side of the PC
board opposite the J designated counterpart. Example, J2 is installed on the topside while P2 is installed in the bottom side
opposite of J2.
This chapter presents in detail the operation of the EVM to provide guidance to the user in evaluating the
onboard AMC and how to interface the EVM to a specific host processor.
Refer to the AMC7823 data sheet (SLAS453 ) for information about its serial interface and other related
topics.
The EVM board is tested and configured to operate from the factory.
The EVM board is set to its default configuration at the factory as described in Table 2 to operate in
unipolar mode. The jumper configuration is shown in Figure 9 for clarity.
Table 2. Factory Default Jumper Settings
Jumper
Reference Function
Position
W1 Open Internal reference voltage is used.
W2 2-3 Digital logic supply, IOV
DD
, for the AMC7823 is +3.3 VD.
W3 1-2 Analog supply, AV
DD
, for the AMC7823 is +5 VA.
W4 1-2 Digital core supply, DV
DD
, for the AMC7823 is +5 VD.
W5 Closed Signal ground for ADC analog input is tied to analog ground.
W6 1-2 CS signal from J2 is routed through to drive the SS signal pin of the AMC7823.
The external 2.5-V reference is connected as the external reference voltage source through the W1
W7 2-3
header.
W8 Open Convert pin is floated and ADC internal trigger is used.
W9 Open LRCLK or BCLK not used for convert signal.
W10 Closed Address of EEPROM is set to 0x00.
W11 Closed Analog ground and digital ground are tied together.
SLAU171 – November 2005 AMC7823 Evaluation Module 9