Maxim MAX12527 manual Pin Description, PIN Name Function, Same side of the PC board

Page 12

MAX12527

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

 

 

 

Pin Description

 

 

 

 

 

 

PIN

NAME

FUNCTION

1, 4, 5, 9,

GND

Converter Ground. Connect all ground pins and the exposed paddle (EP) together.

13, 14, 17

 

 

 

 

 

 

 

 

2

INAP

Channel A Positive Analog Input

 

 

 

 

 

3

INAN

Channel A Negative Analog Input

 

 

 

 

 

6

COMA

Channel A Common-Mode Voltage I/O. Bypass COMA to GND with a 0.1µF capacitor.

 

 

 

Channel A Positive Reference I/O. Channel A conversion range is ±2/3 x (VREFAP - VREFAN). Bypass

7

REFAP

REFAP with a 0.1µF capacitor to GND. Connect a 10µF and a 1µF bypass capacitor between REFAP

and REFAN. Place the 1µF REFAP-to-REFAN capacitor as close to the device as possible on the

 

 

 

 

 

 

same side of the PC board.

 

 

 

 

 

 

 

 

Channel A Negative Reference I/O. Channel A conversion range is ±2/3 x (VREFAP - VREFAN). Bypass

8

REFAN

REFAN with a 0.1µF capacitor to GND. Connect a 10µF and a 1µF bypass capacitor between REFAP

and REFAN. Place the 1µF REFAP-to-REFAN capacitor as close to the device as possible on the

 

 

 

 

 

 

same side of the PC board.

 

 

 

Channel B Negative Reference I/O. Channel B conversion range is ±2/3 x (VREFBP - VREFBN). Bypass

10

REFBN

REFBN with a 0.1µF capacitor to GND. Connect a 10µF and a 1µF bypass capacitor between REFBP

and REFBN. Place the 1µF REFBP-to-REFBN capacitor as close to the device as possible on the

 

 

 

 

 

 

same side of the PC board.

 

 

 

Channel B Positive Reference I/O. Channel B conversion range is ±2/3 x (VREFBP - VREFBN). Bypass

11

REFBP

REFBP with a 0.1µF capacitor to GND. Connect a 10µF and a 1µF bypass capacitor between REFBP

and REFBN. Place the 1µF REFBP-to-REFBN capacitor as close to the device as possible on the

 

 

 

 

 

 

same side of the PC board.

12

COMB

Channel A Common-Mode Voltage I/O. Bypass COMB to GND with a 0.1µF capacitor.

 

 

 

 

 

15

INBN

Channel B Negative Analog Input

 

 

 

 

 

16

INBP

Channel B Positive Analog Input

 

 

 

 

 

 

 

 

Differential/Single-Ended Input Clock Drive. This input selects between single-ended or differential clock

18

DIFFCLK/

input drives.

SECLK

DIFFCLK/SECLK = GND: Selects single-ended clock input drive.

 

 

 

 

 

DIFFCLK/SECLK = OVDD: Selects differential clock input drive.

19

CLKN

Negative Clock Input. In differential clock input mode (DIFFCLK/SECLK = OVDD), connect a differential

clock signal between CLKP and CLKN. In single-ended clock mode (DIFFCLK/SECLK = GND), apply the

 

 

 

clock signal to CLKP and connect CLKN to GND.

20

CLKP

Positive Clock Input. In differential clock input mode (DIFFCLK/SECLK = OVDD), connect a differential

clock signal between CLKP and CLKN. In single-ended clock mode (DIFFCLK/SECLK = GND), apply

 

 

 

the single-ended clock signal to CLKP and connect CLKN to GND.

21

DIV2

Divide-by-Two Clock-Divider Digital Control Input. See Table 2 for details.

 

 

 

 

 

22

DIV4

Divide-by-Four Clock-Divider Digital Control Input. See Table 2 for details.

 

 

 

 

 

 

23–26, 61,

VDD

Analog Power Input. Connect VDD to a 3.15V to 3.60V power supply. Bypass VDD to GND with a parallel

62, 63

capacitor combination of 10µF and 0.1µF. Connect all VDD pins to the same potential.

 

27, 43, 60

OVDD

Output-Driver Power Input. Connect OVDD to a 1.7V to VDD power supply. Bypass OVDD to GND with a

parallel capacitor combination of 10µF and 0.1µF.

 

 

 

 

 

 

 

 

28, 29, 45,

N.C.

No Connection

46

 

 

 

 

 

 

 

 

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Image 12
Contents Features General DescriptionApplications Ordering InformationParameter Symbol Conditions MIN TYP MAX Units DC Accuracy Dynamic Characteristics differential inputsAnalog Input INAP, INAN, INBP, Inbn Conversion RateParameter Symbol Conditions MIN TYP MAX Units Interchannel Characteristics Internal Reference RefoutVcom Parameter Symbol Conditions MIN TYP Clock Inputs CLKP, ClknDigital Inputs DIFFCLK/ SECLK, G/ T, PD, DIV2, DIV4 Digital Outputs D0A-D11A, D0B-D11B, DORA, DORB, DAVPower Requirements D0A-D11A, DoraOvdd DIFFCLK/SECLK = GNDTypical Operating Characteristics Timing Characteristics FigureFFT Plot 16,384-POINT Data Record FFT Plot 32,768-POINT Data RecordMAX12527 THD, Sfdr vs. Clock Speed fIN = 70MHz, AIN = -0.5dBFS FCLK = 65.00352MHz, fIN = 175MHz FIN = 70MHz, AIN = -0.5dBFSTHD, Sfdr vs. Clock Duty Cycle FIN = 70MHz, AIN = -0.5dBFS SNR, Sinad vs. Temperature fIN = 175MHz, AIN = -0.5dBFS Pin Description PIN Name FunctionSame side of the PC board D0B D1BD2B D3BDetailed Description ShrefRefout RefinFunctional Diagram Reference Configurations Reference ModeAnalog Inputs and Input Track-and-Hold T/H Amplifier Reference OutputClock Duty-Cycle Equalizer Clock Input and Clock Control LinesSystem Timing Requirements DIV4 DIV2 FunctionEquivalent Binary D11A-D0ADOR D11A-D0A D11B-D0B CODE10Power-Down Input Vrefp VrefnBinary-to-Gray and Gray-to-Binary Code Conversion Using Transformer Coupling Single-Ended AC-Coupled Input SignalApplications Information Buffered External Reference Drives Multiple ADCs Unbuffered External Reference Drives Multiple ADCsGrounding, Bypassing, and Board Layout MAX12527Parameter Definitions Aperture Delay Full-Power BandwidthOverdrive Recovery Time Total Harmonic Distortion THDPin Configuration Gain MatchingOffset Matching Package Information 68L QFN THIN.EPS