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ADS62P49 Datasheet(PDF) 28 Page - Texas Instruments

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Part No. ADS62P49
Description  Dual Channel 14-/12-Bit, 250-/210-MSPS ADC With DDR LVDS and Parallel CMOS Outputs
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

ADS62P49 Datasheet(HTML) 28 Page - Texas Instruments

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ADS62P49 / ADS62P29
ADS62P48 / ADS62P28
SLAS635A – APRIL 2009 – REVISED JUNE 2009............................................................................................................................................................. www.ti.com
A7–A0 IN HEX
D7
D6
D5
D4
D3
D2
D1
D0
6A
<FINE GAIN ADJUST – CH B>
+0.001 dB to +0.134 dB, in 128 steps
Using the FINE GAIN ADJUST register bits, the channel gain can be trimmed in fine steps. The trim is only
additive, has 128 steps and a range of 0.134dB. The relation between the FINE GAIN ADJUST bits and the
trimmed channel gain is:
Δ Channel gain = 20*log10[1 + (FINE GAIN ADJUST/8192)]
Note that the total device gain = ADC gain +
Δ Channel gain. The ADC gain is determined by register bits
<GAIN PROGRAMMABILITY>
A7–A0 IN HEX
D7
D6
D5
D4
D3
D2
D1
D0
75
0
0
0
<TEST PATTERNS – CH B>
D2-D0
<TEST PATTERNS> Test Patterns to verify data capture.
Applies to channel B (only with independent control)
000
Normal operation
001
Outputs all zeros
010
Outputs all ones
011
Outputs toggle pattern
In ADS62P49/48, output data <D13:D0> alternates between 01010101010101 and
10101010101010 every clock cycle.
In ADS62P29/28, output data <D11:D0> alternates between 010101010101 and 101010101010
every clock cycle.
100
Outputs digital ramp
In ADS62P49/48, output data increments by one LSB (14-bit) every clock cycle from code 0 to
code 16383
In ADS62P29/28, output data increments by one LSB (12-bit) every 4th clock cycle from code 0 to
code 4095
101
Outputs custom pattern (use registers 0x51, 0x52 for setting the custom pattern)
110
Unused
111
Unused
28
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Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): ADS62P49 / ADS62P29 ADS62P48 / ADS62P28


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