ADS62P45 datasheet(50/67 Pages) TI

Part #	ADS62P45

Description	Dual Channel 14-Bit, 125/105/80/65 MSPS ADC with Parallel CMOS/DDR LVDS outputs

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ADS62P45, ADS62P44

ADS62P43, ADS62P42

REV1P0 SEP 2007

50

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PRODUCT PREVIEW information concerns products in

the formative or design phase of development.

Characteristic data and other specifications are design

goals. Texas Instruments reserves the right to change or

discontinue these products without notice.

Output Buffer Strength Programmability

Switching noise (caused by CMOS output data transitions) can couple into the analog inputs during the instant of sampling and

degrade the SNR. The coupling and SNR degradation increases as the output buffer drive is made stronger. To minimize this,

ADS62P4X CMOS output buffers are designed with controlled drive strength to get best SNR. The default drive strength also

ensures wide data stable window for load capacitances up to 5 pF and DRVDD supply voltage > 2.2 V.

To ensure wide data stable window for load capacitance > 5 pF, there exists option to increase the output data & clock drive

strengths using the serial interface (<DATAOUT STRENGTH> & <CLKOUT STRENGTH>). Note that for DRVDD supply

voltage < 2.2 V, it is recommended to use maximum drive strength (for any value of load capacitance).

CMOS Interface Power Dissipation

With CMOS outputs, the DRVDD current scales with the sampling frequency and the load capacitance on every output pin. The

maximum DRVDD current occurs when each output bit toggles between 0 and 1 every clock cycle. In actual applications, this

condition is unlikely to occur. The actual DRVDD current would be determined by the average number of output bits switching,

which is a function of the sampling frequency and the nature of the analog input signal.

Digital current due to CMOS output switching = CL x DRVDD x (N x FAVG),

where CL = load capacitance, N x FAVG = average number of output bits switching.

Figure TBD shows the current with various load capacitances across sampling frequencies at 2 MHz analog input frequency.

Similar Part No. - ADS62P45

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Manufacturer	Part #	Datasheet	Description
Texas Instruments	ADS62P45	1Mb / 70P	[Old version datasheet] DUAL CHANNEL, 14-BITS, 125/105/80/65 MSPS ADC WITH DDR LVDS/CMOS OUTPUTS
	ADS6143IRHB25	2Mb / 67P	[Old version datasheet] 14-BITS, 125/105/80/65 MSPS ADC WITH DDR LVDS/CMOS OUTPUTS
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NXP Semiconductors	ADC1412D065	295Kb / 37P	Dual 14-bit ADC 65, 80, 105 or 125 Msps CMOS or LVDS DDR digital outputs Rev. 02-4 June 2009
NXP Semiconductors	ADC1412D	1Mb / 40P	Dual 14-bit ADC; 65 Msps, 80 Msps, 105 Msps or 125 Msps; CMOS or LVDS DDR digital outputs Rev. 03-6 August 2010
Integrated Device Techn...	ADC1412D	605Kb / 41P	Dual 14-bit ADC; 65 Msps, 80 Msps, 105 Msps or 125 Msps; CMOS or LVDS DDR digital outputs
Renesas Technology Corp	ADC1412D	609Kb / 41P	Dual 14-bit ADC; 65 Msps, 80 Msps, 105 Msps or 125 Msps; CMOS or LVDS DDR digital outputs 2 July 2012
Texas Instruments	ADS6245	3Mb / 76P	[Old version datasheet] DUAL CHANNEL, 14-BIT, 125/105/80/65 MSPS ADC WITH SERIAL LVDS OUTPUTS
	ADS62P25	1Mb / 71P	[Old version datasheet] DUAL CHANNEL, 12-BITS, 125/105/80/65 MSPS ADC WITH DDR LVDS/CMOS OUTPUTS
	ADS62P24	1Mb / 78P	[Old version datasheet] DUAL CHANNEL, 12-BITS, 125/105/80/65 MSPS ADC WITH DDR LVDS/CMOS OUTPUTS