CS5531-AS Ver la hoja de datos (PDF) - Cirrus Logic

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CS5531-AS

16-bit and 24-bit ADCs withUltra-low-noise PGIA

Cirrus Logic 

2.4.1. Channel-Setup Register Descriptions

CSR

#1

Setup 1

Bits <127:112>

Setup 2

Bits <111:96>

CS5531/32/33/34-AS

#4

Setup 7

Bits <31:16>

Setup 8

Bits <15:0>

D31(MSB) D30 D29 D28 D27 D26 D25 D24 D23 D22 D21 D20 D19 D18 D17 D16

CS1 CS0 G2 G1 G0 WR3 WR2 WR1 WR0 U/B OL1 OL0 DT OCD OG1 OG0

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

CS1 CS0 G2 G1 G0 WR3 WR2 WR1 WR0 U/B OL1 OL0 DT OCD OG1 OG0

CS1-CS0 (Channel Select Bits) [31:30] [15:14]

00

Select physical channel 1 (All devices)

01

Select physical channel 2 (All devices)

10

Select physical channel 3 (CS5533/34 only)

11

Select physical channel 4 (CS5533/34 only)

G2-G0 (Gain Bits) [29:27] [13:11]

For VRS = 0, A = 2; For VRS = 1, A = 1; Bipolar input span is twice the unipolar input span.

000

Gain = 1, (Input Span = [(VREF+)-(VREF-)]/1*A for unipolar).

001

Gain = 2, (Input Span = [(VREF+)-(VREF-)]/2*A for unipolar).

010

Gain = 4, (Input Span = [(VREF+)-(VREF-)]/4*A for unipolar).

011

Gain = 8, (Input Span = [(VREF+)-(VREF-)]/8*A for unipolar).

100

Gain = 16, (Input Span = [(VREF+)-(VREF-)]/16*A for unipolar).

101

Gain = 32, (Input Span = [(VREF+)-(VREF-)]/32*A for unipolar).

110

Gain = 64, (Input Span = [(VREF+)-(VREF-)]/64*A for unipolar).

WR3-WR0 (Word Rate) [26:23] [10:7]

The listed Word Rates are for continuous conversion mode using a 4.9152 MHz clock. All word rates will

scale linearly with the clock frequency used. The very first conversion using continuous conversion mode

will last longer, as will conversions done with the single conversion mode. See the section on Performing

Conversions and Tables 1 and 2 for more details.

Bit

WR (FRS = 0)

WR (FRS = 1)

0000

120 Sps

100 Sps

0001

60 Sps

50 Sps

0010

30 Sps

25 Sps

0011

15 Sps

12.5 Sps

0100

7.5 Sps

6.25 Sps

1000

3840 Sps

3200 Sps

1001

1920 Sps

1600 Sps

1010

960 Sps

800 Sps

1011

480 Sps

400 Sps

1100

240 Sps

200 Sps

All other combinations are not used.

28

DS289F5

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