Maxim MAX12557 manual Typical Operating Characteristics, Timing Characteristics Figure

Dual, 65Msps, 14-Bit, IF/Baseband ADC

ELECTRICAL CHARACTERISTICS (continued)

(VDD = 3.3V, OVDD = 2.0V, GND = 0, REFIN = REFOUT (internal reference), CL ≈ 10pF at digital outputs, VIN = -0.5dBFS (differen- tial), DIFFCLK/SECLK = OVDD, PD = GND, SHREF = GND, DIV2 = GND, DIV4 = GND, G/T = GND, fCLK = 65MHz, TA = -40°C to

+85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER	SYMBOL	CONDITIONS	MIN	TYP	MAX	UNITS
TIMING CHARACTERISTICS (Figure 5)
Clock Pulse-Width High	tCH			7.7		ns
Clock Pulse-Width Low	tCL			7.7		ns
Data-Valid Delay	tDAV			5.4		ns
Data Setup Time Before Rising	tSETUP	(Note 6)	7.0			ns
Edge of DAV
Data Hold Time After Rising Edge	tHOLD	(Note 6)	7.0			ns
of DAV
Wake-Up Time from Power-Down	tWAKE	VREFIN = 2.048V		10		ms

Note 1: Specifications ≥+25°C guaranteed by production test, <+25°C guaranteed by design and characterization.

Note 2: Guaranteed by design and characterization. Device tested for performance during product test.

Note 3: Specification guaranteed by production test for ≥+25°C.

Note 4: Two-tone intermodulation distortion measured with respect to a single-carrier amplitude, and not the peak-to-average input power of both input tones.

Note 5: During power-down, D0A–D13A, D0B–D13B, DORA, DORB, and DAV are high impedance.

Note 6: Guaranteed by design and characterization.

Typical Operating Characteristics

(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.)

FFT PLOT (32,768-POINT DATA RECORD) FFT PLOT (32,768-POINT DATA RECORD) FFT PLOT (32,768-POINT DATA RECORD)

MAX12557

	0				fCLK = 65MHz		toc01		0
	-10								-10
					fIN = 3.00125MHz		MAX12557
	-20								-20
					AIN = -0.48dBFS
(dBFS)	-30				SNR = 74.45dB			(dBFS)	-30
	-40				SINAD = 74.33dB				-40
					THD = -90.06dBc
	-50								-50
					SFDR = 92.47dBc
AMPLITUDE								AMPLITUDE
	-60								-60
	-70		HD2 HD3						-70
	-80								-80
	-90								-90
	-100								-100
	-110								-110
	-120								-120
	0	5	10	15	20	25	30

				fCLK = 65.00352MHz			toc02		0
									-10
				fIN = 32.40058MHz			MAX12557
									-20
				AIN = -0.424dBFS
				SNR = 74.77dB				(dBFS)	-30
				SINAD = 74.62dB					-40
				THD = -87.22dBc
									-50
				SFDR = 91.88dBc
								AMPLITUDE
									-60
					HD3				-70
									-80
	HD2
									-90
									-100
									-110
0	5	10	15	20	25	30			-120

			fCLK = 65.00352MHz				toc03
			AIN = -0.498dBFS				MAX12557
			fIN	= 70.00852MHz
			SNR = 74.41dB
			SINAD = 74.00dB
			THD = -84.50dBc
			SFDR = 86.25dBc
		HD2	HD3
0	5	10	15	20	25	30

ANALOG INPUT FREQUENCY (MHz) ANALOG INPUT FREQUENCY (MHz) ANALOG INPUT FREQUENCY (MHz)

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