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

 

 

 

 

 

 

 

REF_P Sink Current

IREFAP

VREF_P = 2.418V

 

1.2

 

mA

IREFBP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REF_N Source Current

IREFAN

VREF_N = 0.882V

 

0.85

 

mA

IREFBN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COM_ Sink Current

ICOMA

VCOM_ = 1.65V

 

0.85

 

mA

ICOMB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REF_P, REF_N Capacitance

CREF_P,

 

 

13

 

pF

CREF_N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COM_ Capacitance

CCOM_

 

 

6

 

pF

CLOCK INPUTS (CLKP, CLKN)

 

 

 

 

 

 

 

 

 

 

 

 

 

Single-Ended Input High

VIH

DIFFCLK/SECLK = GND, CLKN = GND

0.8 x

 

 

V

Threshold

VDD

 

 

 

 

 

 

 

Single-Ended Input Low

VIL

DIFFCLK/SECLK = GND, CLKN = GND

 

 

0.2 x

V

Threshold

 

 

VDD

 

 

 

 

 

Minimum Differential Clock Input

 

DIFFCLK/SECLK = OVDD

 

0.2

 

VP-P

Voltage Swing

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Differential Input Common-Mode

 

DIFFCLK/SECLK = OVDD

 

VDD / 2

 

V

Voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CLK_ Input Resistance

RCLK

Each input, Figure 4

 

5

 

k

CLK_ Input Capacitance

CCLK

 

 

2

 

pF

DIGITAL INPUTS (DIFFCLK/SECLK, G/T, PD, DIV2, DIV4)

 

 

 

 

 

 

 

 

 

 

 

Input High Threshold

VIH

 

0.8 x

 

 

V

 

OVDD

 

 

 

 

 

 

 

 

Input Low Threshold

VIL

 

 

 

0.2 x

V

 

 

 

OVDD

 

 

 

 

 

 

Input Leakage Current

 

OVDD applied to input

 

 

±5

µA

 

Input connected to ground

 

 

±5

 

 

 

 

 

Digital Input Capacitance

CDIN

 

 

5

 

pF

DIGITAL OUTPUTS (D0A–D13A, D0B–D13B, DORA, DORB, DAV)

 

 

 

 

 

 

 

 

 

 

 

 

 

D0A–D13A, D0B–D13B, DORA, DORB:

 

 

0.2

 

Output-Voltage Low

VOL

ISINK = 200µA

 

 

V

 

 

 

 

 

DAV: ISINK = 600µA

 

 

0.2

 

 

 

D0A–D13A, D0B–D13B, DORA, DORB:

OVDD -

 

 

 

Output-Voltage High

VOH

ISOURCE = 200µA

0.2

 

 

V

DAV: ISOURCE = 600µA

OVDD -

 

 

 

 

 

 

 

 

 

0.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tri-State Leakage Current

ILEAK

OVDD applied to input

 

 

±5

µA

(Note 3)

Input connected to ground

 

 

±5

 

 

 

 

MAX12557

_______________________________________________________________________________________ 5

Page 5
Image 5
Maxim MAX12557 manual Clock Inputs CLKP, Clkn, DIFFCLK/ Seclk = GND, Clkn = GND, DIFFCLK/ Seclk = OV DD