MAX1185ECM datasheet(3/20 Pages) MAXIM

Part #	MAX1185ECM

Description	Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs

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Manufacturer	MAXIM [Maxim Integrated Products]

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Dual 10-Bit, 20Msps, +3V, Low-Power ADC with

Internal Reference and Multiplexed Parallel Outputs

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(VDD = +3V, OVDD = +2.5V, 0.1µF and 1µF capacitors from REFP, REFN, and COM to GND; REFOUT connected to REFIN through a

10k

Ω resistor, VIN = 2Vp-p (differential w.r.t. COM), CL = 10pF at digital outputs (Note 5), fCLK = 20MHz,

TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

fINA or B = 7.5MHz

-74

Third-Harmonic Distortion

HD3

fINA or B = 12MHz

-72

dBc

fINA or B = 11.9852MHz at -6.5dB FS

Intermodulation Distortion

IMD

fINA or B = 12.8934MHz at -6.5dB FS (Note 2)

-76

dBc

fINA or B = 7.5MHz, TA = +25

°C

-72

-64

Total Harmonic Distortion

(first 4 harmonics)

THD

fINA or B = 12MHz

-71

dBc

Small-Signal Bandwidth

Input at -20dB FS, differential inputs

500

MHz

Full-Power Bandwidth

FPBW

Input at -0.5dB FS, differential inputs

400

MHz

Aperture Delay

tAD

1ns

Aperture Jitter

tAJ

2psRMS

Overdrive Recovery Time

For 1.5 ✕ full-scale input

2

ns

Differential Gain

±1%

Differential Phase

±0.25

degrees

Output Noise

INA+ = INA- = INB+ = INB- = COM

0.2

LSBRMS

INTERNAL REFERENCE

Reference Output Voltage

REFOUT

2.048

±3%

V

Reference Temperature

Coefficient

TCREF

60

ppm/°C

Load Regulation

1.25

mV/mA

BUFFERED EXTERNAL REFERENCE (VREFIN = +2.048V)

REFIN Input Voltage

VREFIN

2.048

V

Positive Reference Output

Voltage

VREFP

2.012

V

Negative Reference Output

Voltage

VREFN

0.988

V

Differential Reference Output

Voltage Range

∆VREF

∆VREF = VREFP - VREFN

0.98

1.024

1.07

V

REFIN Resistance

RREFIN

>50

M

Ω

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