Maxim MAX12527 manual THD, Sfdr vs. Clock Speed fIN = 70MHz, AIN = -0.5dBFS

Dual, 65Msps, 12-Bit, IF/Baseband ADC

Typical Operating Characteristics (continued)

(VDD = 3.3V, OVDD = 2.0V, GND = 0, REFIN = REFOUT (internal reference mode), CL ≈ 5pF at digital outputs, VIN = -0.5dBFS, DIFFCLK/SECLK = OVDD, PD = GND, G/T = GND, fCLK = 65MHz (50% duty cycle), TA = +25°C, unless otherwise noted.)

SNR, SINAD vs. ANALOG INPUT AMPLITUDE	-THD, SFDR vs. ANALOG INPUT AMPLITUDE
(fCLK = 65.00352MHz, fIN = 175MHz)	(fCLK = 65.00352MHz, fIN = 175MHz)

SNR, SINAD vs. CLOCK SPEED (fIN = 70MHz, AIN = -0.5dBFS)

	75		toc13		95
	SNR		MAX12527		85
	65
(dB)	55			(dBc)	75
					65
SINAD				SFDR
	45				55
SNR,	SINAD			-THD,
	35
					45
	25				35
	15				25
	-55 -50 -45 -40 -35 -30 -25 -20 -15 -10	-5	0

		toc14	72
SFDR		MAX12527	70
		SINAD (dB)	68
			66
-THD		SNR,
			64
			62
-55 -50 -45 -40 -35 -30 -25 -20 -15 -10	-5	0	60

SNR	toc15
	MAX12527
SINAD

20 25 30 35 40 45 50 55 60 65

MAX12527

AIN (dBFS) AIN (dBFS)

fCLK (MHz)

-THD, SFDR vs. CLOCK SPEED (fIN = 70MHz, AIN = -0.5dBFS)

	90			SFDR						toc16	72
	85									MAX12527	70
SFDR (dBc)	80			-THD						SINAD(dB)	68
	75										66
-THD,	70									SNR,	64
	65										62
	60										60
	20	25	30	35	40	45	50	55	60	65
					fCLK (MHz)

SNR, SINAD vs. CLOCK SPEED (fIN = 175MHz, AIN = -0.5dBFS)

	toc17
SNR	MAX12527
	SINAD

20	25	30	35	40	45	50	55	60	65
				fCLK (MHz)

-THD, SFDR vs. CLOCK SPEED (fIN = 175MHz, AIN = -0.5dBFS)

	90									toc18
	85			SFDR						MAX12527
SFDR (dBc)	80
	75			-THD
-THD,	70
	65
	60
	20	25	30	35	40	45	50	55	60	65
				fCLK (MHz)

SNR, SINAD vs. ANALOG SUPPLY VOLTAGE	-THD, SFDR vs. ANALOG SUPPLY VOLTAGE	SNR, SINAD vs. ANALOG SUPPLY VOLTAGE
(fCLK = 65.00352MHz, fIN = 70MHz)	(fCLK = 65.00352MHz, fIN = 70MHz)	(fCLK = 65.00352MHz, fIN = 175MHz)

	72			SNR			toc19	90
							MAX12527
	70							85
SINAD(dB)	68		SINAD				SFDR (dBc)	80
	66							75
SNR,	64						-THD,	70
	62							65
	60							60
	3.0	3.1	3.2	3.3	3.4	3.5	3.6

						toc20	72
			SFDR
						MAX12527
							70
						(dB)	68
					-THD
						SINAD
							66
						SNR,	64
							62
3.0	3.1	3.2	3.3	3.4	3.5	3.6	60

			SNR			toc21
						MAX12527
		SINAD
3.0	3.1	3.2	3.3	3.4	3.5	3.6

VDD (V) VDD (V) VDD (V)

_______________________________________________________________________________________ 9