CDK1300ITQ44_Q datasheet(11/12 Pages) CADEKA

номер детали	CDK1300ITQ44_Q

подробное описание детали	8-bit, 250 MSPS ADC with Demuxed Outputs

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производитель	CADEKA [Cadeka Microcircuits LLC.]

домашняя страница	http://www.cadeka.com

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Data Sheet

selected transformer does not exhibit core saturation at

the full-scale voltage. Proper termination of the input is

important for input signal purity. A small capacitor across

the input attenuates kickback noise from the internal track-

and-hold.

Figure 6 illustrates a solution (based on operational ampli-

fiers) that can be used if a DC-coupled single-ended input

is desired.

Figure 6. DC-Coupled Single-Ended to Differential

Conversion (power supplies and bypassing are not shown)

Input Protection

All I/O pads are protected with an on-chip protection circuit.

This circuit provides ESD robustness and prevents latchup

under severe discharge conditions without degrading ana-

log transmission times.

Power Supplies and Grounding

The CDK1300 is operated from a single power supply in

the range of 4.75V to 5.25V. Normal operation is suggest-

ed to be 5.0V. All power supply pins should be bypassed

as close to the package as possible. The analog and digital

grounds should be connected together with a ferrite bead

as shown in the typical interface circuit and as close to the

ADC as possible.

Power-Down Mode

To save on power, the CDK1300 incorporates a power-

down function. This function is controlled by the signal on

pin PD. When pin PD is set high, the CDK1300 enters the

power-down mode. All outputs are set to high impedance.

In the powerdown mode the CDK1300 dissipates 24mW

typically.

Common-Mode Voltage Reference Circuit

The CDK1300 has an on-board common-mode voltage ref-

erence circuit (VCM). It is 2.5V and is capable of driving

50µA loads typically. The circuit is commonly used to drive

the center tap of the RF transformer in fully differential

applications. For single-ended applications, this output

can be used to provide the level shifting required for the

single-to-differential converter conversion circuit. Bypass

VCM to AGND by external 0.01µF capacitor, as shown in

Figure 3 on the previous page.

Clock Input

The clock input on the CDK1300 can be driven by either a

single-ended or double-ended clock circuit and can handle

TTL, PECL, and CMOS signals. When operating at high

sample rates it is important to keep the pulse width of the

clock signal as close to 50% as possible. For TTL/CMOS

single- ended clock inputs, the rise time of the signal

also becomes an important consideration.

Digital Outputs

The output circuitry of the CDK1300 has been designed

to be able to support three separate output modes. The

demuxed (double-wide) mode supports either parallel

aligned or interleaved data output. The single-channel mode

is not demuxed and can support direct output at speeds up

to 125 MSPS. The output format is straight binary (Table 1).

Table 1. Output Data Format

analog input

output code D7–D0

+FS

1111 1111

+FS - 1 LSB

1111 111Ø

+1 FS

1000 000Ø

-FS + 1 LSB

0000 000Ø

-FS

0000 0000

Ø indicates the flickering bit between logic 0 and 1

The data output mode is set using the DMODE1 and

DMODE2 inputs (pins 32 & 31 respectively). Table 2 describes

the mode switching options.

Table 2. Output Data Modes

output Mode

DMoDe1

DMoDe2

Parallel Dual Channel Output

0

Interleaved Dual Channel Output

0

1

Single Channel Data Output

(Bank A only 125 MSPS max)

1

X

Аналогичный номер детали - CDK1300ITQ44_Q

производитель	номер детали	датащи	подробное описание детали
Cadeka Microcircuits LL...	CDK1301	2Mb / 12P	8-bit, 250 MSPS A/D Converter with Demuxed Outputs REV 1A
	CDK1301ITQ44	2Mb / 12P	8-bit, 250 MSPS A/D Converter with Demuxed Outputs REV 1A
	CDK1301ITQ44_Q	2Mb / 12P	8-bit, 250 MSPS A/D Converter with Demuxed Outputs REV 1A
	CDK1302	1Mb / 9P	8-bit, 750 MSPS, Flash A/D Converter
	CDK1302AEMQ80	1Mb / 9P	8-bit, 750 MSPS, Flash A/D Converter

More results

Аналогичное описание - CDK1300ITQ44_Q

производитель	номер детали	датащи	подробное описание детали
Cadeka Microcircuits LL...	SPT7721	192Kb / 11P	8-BIT, 250 MSPS ADC WITH DEMUXED OUTPUTS
Fairchild Semiconductor	SPT7721	103Kb / 11P	8-BIT, 250 MSPS ADC WITH DEMUXED OUTPUTS
Fairchild Semiconductor	SPT7722	217Kb / 12P	8-bit, 250 MSPS A/D Converter with Demuxed Outputs
Cadeka Microcircuits LL...	CDK1301	2Mb / 12P	8-bit, 250 MSPS A/D Converter with Demuxed Outputs REV 1A
ATMEL Corporation	TS8308500	491Kb / 50P	ADC 8-bit 500 Msps
Texas Instruments	ADS62P19	1Mb / 65P	[Old version datasheet] Dual-Channel, 11-Bit, 250-MSPS ADC With DDR LVDS and Parallel CMOS Outputs
NXP Semiconductors	TDA8757	895Kb / 37P	Triple 8-bit ADC 170 Msps Rev. 07-28 February 2002
ATMEL Corporation	AT84AD004	1,023Kb / 58P	DUAL 8 BIT 500 MSPS ADC
Texas Instruments	ADS5525	806Kb / 48P	[Old version datasheet] 12-BIT, 170 MSPS ADC WITH DDR LVDS/CMOS OUTPUTS
Texas Instruments	ADS5547	1Mb / 50P	[Old version datasheet] 14-BIT, 210 MSPS ADC WITH DDR LVDS/CMOS OUTPUTS

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