ADS6445 datasheet(56/75 Pages) STMICROELECTRONICS

56 / 75 page

www.ti.com

DIGITAL OUTPUT INTERFACE

1-WIRE INTERFACE - 14

× AND 16× SERIALIZATION WITH DDR BIT CLOCK

ADS6445, ADS6444

ADS6443, ADS6442

SLAS531 – MAY 2007

The ADS644X offers several flexible output options making it easy to interface to an ASIC or an FPGA. Each of

these options can be easily programmed using either parallel pins or the serial interface.

The output interface options are:

• 1-Wire, 1× frame clock, 14× and 16× serialization with DDR bit clock

• 2-Wire, 1× frame clock, 16× serialization, with DDR and SDR bit clock, byte wise/bit wise/word wise

• 2-Wire, 1× frame clock, 14× serialization, with SDR bit clock, byte wise/bit wise/word wise

• 2-Wire, (0.5 x) frame clock, 14× serialization, with DDR bit clock, byte wise/bit wise/word wise

The maximum sampling frequency, bit clock frequency and output data rate will vary depending on the interface

options selected (refer to Table 12).

Table 24. Maximum Recommended Sampling Frequency for Different Output Interface Options

MAXIMUM

RECOMMENDED

BIT CLOCK

FRAME CLOCK

SERIAL DATA

INTERFACE OPTIONS

SAMPLING

FREQUENCY,

FREQUENCY, MHZ

RATE, Mbps

FREQUENCY,

MHZ

MSPS

× Serialization

455

910

DDR Bit

1-Wire

clock

× Serialization

520

1040

× Serialization

125

437.5

62.5

875

DDR Bit

2-Wire

clock

× Serialization

125

500

125

1000

× Serialization

455

910

SDR Bit

2-Wire

clock

× Serialization

520

1040

Each interface option is described in detail in the following sections.

Here the device outputs the data of each ADC serially on a single LVDS pair (1-wire). The data is available at

the rising and falling edges of the bit clock (DDR bit clock). The ADC outputs a new word at the rising edge of

every frame clock, starting with the MSB. Optionally, it can also be programmed to output the LSB first. The data

rate is 14

× sample frequency (14× serialization) and 16 × sample frequency (16× serialization).

Submit Documentation Feedback

ADS6445 Datasheet(PDF) 56 Page - STMicroelectronics

ADS6445 Datasheet(HTML) 56 Page - STMicroelectronics

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 70 71 72 73 74 75

Datasheet Download

Link URL