Texas Instruments ADS7881 User Manual Download Page 19

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Regulatory Notices:

3.1

United States

3.1.1

Notice applicable to EVMs not FCC-Approved:

FCC NOTICE:

This kit is designed to allow product developers to evaluate electronic components, circuitry, or software

associated with the kit to determine whether to incorporate such items in a finished product and software developers to write
software applications for use with the end product. This kit is not a finished product and when assembled may not be resold or
otherwise marketed unless all required FCC equipment authorizations are first obtained. Operation is subject to the condition
that this product not cause harmful interference to licensed radio stations and that this product accept harmful interference.
Unless the assembled kit is designed to operate under part 15, part 18 or part 95 of this chapter, the operator of the kit must
operate under the authority of an FCC license holder or must secure an experimental authorization under part 5 of this chapter.

3.1.2

For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant:

CAUTION

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any interference received, including interference that may cause
undesired operation.

Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to
operate the equipment.

FCC Interference Statement for Class A EVM devices

NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.

FCC Interference Statement for Class B EVM devices

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

Consult the dealer or an experienced radio/TV technician for help.

3.2

Canada

3.2.1

For EVMs issued with an Industry Canada Certificate of Conformance to RSS-210 or RSS-247

Concerning EVMs Including Radio Transmitters:

This device complies with Industry Canada license-exempt RSSs. Operation is subject to the following two conditions:

(1) this device may not cause interference, and (2) this device must accept any interference, including interference that may
cause undesired operation of the device.

Concernant les EVMs avec appareils radio:

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation
est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit
accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

Concerning EVMs Including Detachable Antennas:

Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser)
gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type
and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for
successful communication. This radio transmitter has been approved by Industry Canada to operate with the antenna types
listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated.
Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited
for use with this device.

Summary of Contents for ADS7881

Page 1: ...2 1 Decoding Control Signals Using the Address Bus 7 Figure 4 1 Top Layer Layer 1 10 Figure 4 2 Ground Plane Layer 2 11 Figure 4 3 Power Plane Layer 3 12 Figure 4 4 Bottom Layer Layer 4 13 Figure 5 1...

Page 2: ...SCLS230 SN74AHC1G04 SCLS318 1 1 Features The ADS78x1EVM includes the following features Full featured evaluation board for the high speed SAR type ADS7881 12 bit 4 MSPS or ADS7891 14 bit 3 MSPS single...

Page 3: ...al but also isolates the amplifier from the capacitive load The capacitor to ground at the input of the ADC works in conjunction with the series resistor to filter the input signal and functions as a...

Page 4: ...U2 to ground Installed Short to pin 4 of amplifier U2 to VCC Installed 1 1 Factory set condition 1 3 Digital Interface The ADS78x1EVM is designed for easy interfacing to multiple platforms Samtec part...

Page 5: ...EVM to a host processor Table 1 6 Data Bus Connector P3 Connector Pin 1 Signal Name Description ADS7881 ADS7891 P3 1 B_DB0 Not connected Buffered data bit 0 LSB P3 3 B_DB1 Not connected Buffered data...

Page 6: ...digital section of the board ADC address decoder buffers There are two ways to provide these voltages 1 Wire in voltages as listed in Table 1 8 at test points on the EVM Table 1 8 Power Supply Test P...

Page 7: ...be applied via test point TP12 or connector J1 pin 1 As a software test platform connectors P1 P2 and P3 plug into the parallel interface connectors of the 5 6K interface card The 5 6K interface card...

Page 8: ...ternate C1608C0G1H102J CAP CER 1000 pF 50V C0G 5 0603 17 13 0 01 F C4 C10 C13 C20 C21C26 C41 C44 C46 C48 C50 C53 C56 603 TDK Corporation or Alternate C1608X7R1H103KT CAP CER 10000 pF 50V X7R 10 0603 1...

Page 9: ...c SSW 105 22 S D VS 0 025 SMT socket bottom side of PWB 43 1 Samtec TSM 105 01 T D V P 0 025 SMT plug top side of PWB 44 1 SMA_PCB_MT J2 SMA_JACK Johnson Components Inc 142 0701 301 Right angle SMA co...

Page 10: ...te the silkscreens for the ADS78x1EVM Figure 4 1 Top Layer Layer 1 ADS78x1EVM Layout www ti com 10 ADS7881EVM ADS7891EVM Evaluation Module SLAU150A DECEMBER 2004 REVISED OCTOBER 2021 Submit Document F...

Page 11: ...2 Ground Plane Layer 2 www ti com ADS78x1EVM Layout SLAU150A DECEMBER 2004 REVISED OCTOBER 2021 Submit Document Feedback ADS7881EVM ADS7891EVM Evaluation Module 11 Copyright 2021 Texas Instruments Inc...

Page 12: ...3 Power Plane Layer 3 ADS78x1EVM Layout www ti com 12 ADS7881EVM ADS7891EVM Evaluation Module SLAU150A DECEMBER 2004 REVISED OCTOBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Inco...

Page 13: ...4 Bottom Layer Layer 4 www ti com ADS78x1EVM Layout SLAU150A DECEMBER 2004 REVISED OCTOBER 2021 Submit Document Feedback ADS7881EVM ADS7891EVM Evaluation Module 13 Copyright 2021 Texas Instruments Inc...

Page 14: ...B_DB0 B_DB1 B_DB2 B_DB3 B_DB4 B_DB5 B_DB6 B_DB7 B_DB8 B_DB9 B_DB10 B_DB11 B_DB12 B_DB13 AVCC BVDD 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20...

Page 15: ...1 2 SJP7 3 1 2 SJP6 3 2 6 7 4 5 1 8 U2 THS4031 C30 NI TP9 R1 21 R2 NI REFIN 1 REFOUT 2 NC 3 VA 4 AGND 5 IN 6 IN 7 AGND 8 VA 9 VA 10 AGND 11 AGND 12 AGND 14 AGND 15 DB13 16 DB12 17 DB11 18 DB10 19 DB9...

Page 16: ...DB7 B_DB4 B_DB6 B_DB5 CS RD CONVST BYTE PWN RST B_BUSY 1 16 2 15 3 14 4 13 5 9 12 6 8 10 11 7 RP2 100 OE DIR A1 A2 A3 A4 A5 A6 A7 A8 B1 B2 B3 B4 B5 B6 B7 B8 VCC GND U5 SN74AHC245PWR VBD C25 0 1uF CS R...

Page 17: ...91EVM to ADS78x1EVM throughout document 1 Added Related Documentation from Texas Instruments table to Introduction section 2 Changed paragraph preceding Data Bus Connector P3 4 Changed Data Bus Connec...

Page 18: ...ther than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control tec...

Page 19: ...These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not in...

Page 20: ...instructions set forth by Radio Law of Japan which includes but is not limited to the instructions below with respect to EVMs which for the avoidance of doubt are stated strictly for convenience and s...

Page 21: ...any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electr...

Page 22: ...R DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthe...

Page 23: ...are subject to change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and...

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