ADC14X250 datasheet(36/69 Pages) TI1

36 / 69 page

ADC14X250

SLASE49 – DECEMBER 2015

www.ti.com

Product Folder Links: ADC14X250

Submit Documentation Feedback

8.5.1.10 IMB_ADJ (Imbalance Adjust), [Address: 0x0014], [Default: 0x00]

Table 16. IMB_ADJ (Imbalance Adjust), [Address: 0x0014], [Default: 0x00]

Bit

Field

Type

Reset

Description

[7]

Reserved

Read or write

Reserved. Must be written with 0.

[6:4]

AMPADJ[2:0]

Read or write

000

Analog input amplitude imbalance correction

7 = +30

Ω VIN+, –30 Ω VIN–

6 = +20

Ω VIN+, –20 Ω VIN–

5 = +10

Ω VIN+, –10 Ω VIN–

4 = Reserved

3 = –30

Ω VIN+, +30 Ω VIN–

2 = –20

Ω VIN+, +20 Ω VIN–

1 = –10

Ω VIN+, +10 Ω VIN–

0 = +0

Ω VIN+, –0 Ω VIN– (default)

Resistance changes indicate variation of the internal single-ended

termination.

[3:0]

PHADJ[3:0]

Read or write

0000

Analog input phase imbalance correction

15 = +1.68 pF VIN–

...

9 = +0.48 pF VIN–

8 = +0.24 pF VIN–

7 = +1.68 pF VIN+

...

2 = +0.48 pF VIN+

1 = +0.24 pF VIN+

0 = +0 pF VIN+, +0 pF VIN– (default)

Capacitance changes indicate the addition of internal capacitive load

on the given pin.

8.5.1.11 DC_MODE (DC Offset Correction Mode), [Address: 0x003D], [Default: 0x00]

Table 17. DC_MODE (DC Offset Correction Mode), [Address: 0x003D], [Default: 0x00]

DC_MODE (DC Offset Correction Mode)

Bit

Field

Type

Reset

Description

[7:3]

Reserved

Read or

write

00000

Reserved and must be written as 00000.

[2:1]

TC_DC

Read or

write

DC offset filter time constant.

The time constant determines the filter bandwidth of the DC high-pass filter.

TC_DC

Time Constant

(FS = 250

MSPS)

3-dB Bandwidth

(FS = 250

MSPS)

3-dB Bandwidth

(Normalized)

17 µs

9.3 kHz

37e–6 × Fs

130 µs

1.2 kHz

4.9e–6 × Fs

1.1 ms

150 Hz

605e–9 × Fs

8.4 ms

19 Hz

76e–9 × Fs

[0]

DC_EN

Read or

Write

DC offset correction enable

0 : Disable DC offset correction

1 : Enable DC offset correction

ADC14X250 Datasheet(PDF) 36 Page - Texas Instruments

ADC14X250 Datasheet(HTML) 36 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69

Datasheet Download

Link URL