MAX19505ETM+ Maxim Integrated Products, MAX19505ETM+ Datasheet

IC ADC 8BIT 1CH 65MSPS 48TQFN

MAX19505ETM+

Manufacturer Part Number
MAX19505ETM+
Description
IC ADC 8BIT 1CH 65MSPS 48TQFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX19505ETM+

Number Of Bits
8
Sampling Rate (per Second)
65M
Data Interface
Serial, Parallel
Number Of Converters
1
Power Dissipation (max)
99mW
Voltage Supply Source
Analog and Digital
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
48-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX19505 dual-channel, analog-to-digital convert-
er (ADC) provides 8-bit resolution and a maximum sam-
ple rate of 65Msps.
The MAX19505 analog input accepts a wide 0.4V to
1.4V input common-mode voltage range, allowing DC-
coupled inputs for a wide range of RF, IF, and base-
band front-end components. The MAX19505 provides
excellent dynamic performance from baseband to high
input frequencies beyond 400MHz, making the device
ideal for zero-intermediate frequency (ZIF) and high-
intermediate frequency (IF) sampling applications. The
typical signal-to-noise ratio (SNR) performance is
49.8dBFS and typical spurious-free dynamic range
(SFDR) is 69dBc at f
The MAX19505 operates from a 1.8V supply.
Additionally, an integrated, self-sensing voltage regula-
tor allows operation from a 2.5V to 3.3V supply (AVDD).
The digital output drivers operate on an independent
supply voltage (OVDD) over the 1.8V to 3.5V range.
The analog power consumption is only 43mW per chan-
nel at V
power, the MAX19505 consumes only 1mW in power-
down mode and 15mW in standby mode.
Various adjustments and feature selections are avail-
able through programmable registers that are
accessed through the 3-wire serial-port interface.
Alternatively, the serial-port interface can be disabled,
with the three pins available to select output mode,
data format, and clock-divider mode. Data outputs are
available through a dual parallel CMOS-compatible out-
put data bus that can also be configured as a single
multiplexed parallel CMOS bus.
The MAX19505 is available in a small 7mm x 7mm
48-pin thin QFN package and is specified over the
-40°C to +85°C extended temperature range.
Refer to the MAX19515, MAX19516, and MAX19517
data sheets for pin- and feature-compatible 10-bit,
65Msps, 100Msps, and 130Msps versions, respectively.
Refer to the MAX19506 and MAX19507 data sheets for
pin- and feature-compatible 8-bit, 100Msps and
130Msps versions, respectively.
19-4314; Rev 1; 9/10
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
IF and Baseband Communications, Including
Cellular Base Stations and Point-to-Point
Microwave Receivers
Ultrasound and Medical Imaging
Portable Instrumentation and Low-Power Data
Acquisition
Digital Set-Top Boxes
AVDD
= 1.8V. In addition to low operating
________________________________________________________________ Maxim Integrated Products
IN
= 70MHz and f
General Description
Applications
Dual-Channel, 8-Bit, 65Msps ADC
CLK
= 65MHz.
o Very-Low-Power Operation (43mW/Channel at
o 1.8V or 2.5V to 3.3V Analog Supply
o Excellent Dynamic Performance
o User-Programmable Adjustments and Feature
o Selectable Data Bus (Dual CMOS or Single
o DCLK Output and Programmable Data Output
o Very Wide Input Common-Mode Voltage Range
o Very High Analog Input Bandwidth (> 850MHz)
o Single-Ended or Differential Analog Inputs
o Single-Ended or Differential Clock Input
o Divide-by-One (DIV1), Divide-by-Two (DIV2), and
o Two’s Complement, Gray Code, and Offset Binary
o Out-of-Range Indicator (DOR)
o CMOS Output Internal Termination Options
o Reversible Bit Order (Programmable)
o Data Output Test Patterns
o Small, 7mm x 7mm 48-Pin Thin QFN Package with
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
Pin Configuration appears at end of data sheet.
SPI is a trademark of Motorola, Inc.
MAX19505ETM+
65Msps)
Selection through an SPI™ Interface
Multiplexed CMOS)
Timing Simplifies High-Speed Digital Interface
(0.4V to 1.4V)
Divide-by-Four (DIV4) Clock Modes
Output Data Format
(Programmable)
Exposed Pad
49.8dBFS SNR at 70MHz
69dBc SFDR at 70MHz
PART
-40°C to +85°C
TEMP RANGE
Ordering Information
PIN-PACKAGE
48 TQFN-EP*
Features
1

Related parts for MAX19505ETM+

MAX19505ETM+ Summary of contents

Page 1

... Reversible Bit Order (Programmable) o Data Output Test Patterns o Small, 7mm x 7mm 48-Pin Thin QFN Package with Exposed Pad PART MAX19505ETM+ + Denotes a lead(Pb)-free/RoHS-compliant package Exposed pad. Pin Configuration appears at end of data sheet. SPI is a trademark of Motorola, Inc. Features Ordering Information ...

Page 2

Dual-Channel, 8-Bit, 65Msps ADC ABSOLUTE MAXIMUM RATINGS OVDD, AVDD to GND............................................-0.3V to +3.6V CMA, CMB, REFIO, INA+, INA-, INB+, INB- to GND ......................................................-0.3V to +2.1V CLK+, CLK-, SYNC, SPEN, CS, SCLK, SDIN to GND ..........-0.3V to the lower of (V ...

Page 3

ELECTRICAL CHARACTERISTICS (continued 1.8V, internal reference, differential clock, V AVDD OVDD = 50Ω -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL DYNAMIC PERFORMANCE Small-Signal Noise Floor Signal-to-Noise Ratio ...

Page 4

Dual-Channel, 8-Bit, 65Msps ADC ELECTRICAL CHARACTERISTICS (continued 1.8V, internal reference, differential clock, V AVDD OVDD = 50Ω -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL INTERCHANNEL CHARACTERISTICS Crosstalk ...

Page 5

ELECTRICAL CHARACTERISTICS (continued 1.8V, internal reference, differential clock, V AVDD OVDD = 50Ω -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL CLOCK INPUT (SYNC) Allowable Logic Swing Sync ...

Page 6

Dual-Channel, 8-Bit, 65Msps ADC ELECTRICAL CHARACTERISTICS (continued 1.8V, internal reference, differential clock, V AVDD OVDD = 50Ω -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL POWER-MANAGEMENT CHARACTERISTICS Wake-Up ...

Page 7

ELECTRICAL CHARACTERISTICS (continued 1.8V, internal reference, differential clock, V AVDD OVDD = 50Ω -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL POWER REQUIREMENTS Analog Supply Voltage Digital Output ...

Page 8

Dual-Channel, 8-Bit, 65Msps ADC ( 1.8V, internal reference, differential clock, V AVDD OVDD = 50Ω +25°C, unless otherwise noted.) A 3MHz INPUT FFT PLOT 2.99877166MHz IN - -0.493dBFS IN SNR ...

Page 9

V = 1.8V, internal reference, differential clock, V AVDD OVDD = 50Ω +25°C, unless otherwise noted.) A SINGLE-ENDED PERFORMANCE vs. INPUT FREQUENCY 85 80 SFDR1 SFDR2 -THD SINAD 55 SNR 50 45 ...

Page 10

Dual-Channel, 8-Bit, 65Msps ADC ( 1.8V, internal reference, differential clock, V AVDD OVDD = 50Ω +25°C, unless otherwise noted.) A ANALOG SUPPLY CURRENT vs. SUPPLY VOLTAGE ...

Page 11

V = 1.8V, internal reference, differential clock, V AVDD OVDD = 50Ω +25°C, unless otherwise noted.) A OFFSET ERROR vs. TEMPERATURE 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -40 - ...

Page 12

Dual-Channel, 8-Bit, 65Msps ADC PIN NAME 1, 12, 13, 48 AVDD Analog Supply Voltage. Bypass each AVDD input pair (1, 48) and (12, 13) to GND with 0.1µF. 2 CMA Channel A Common-Mode Input-Voltage Reference 3 INA+ Channel A Positive ...

Page 13

PIN NAME 40 D5A Channel A Three-State Digital Output, Bit 5 41 D6A Channel A Three-State Digital Output, Bit 6 42 D7A Channel A Three-State Digital Output, Bit 7 (MSB) 43 DORA Channel A Data Over Range 44 DCLKA Channel ...

Page 14

Dual-Channel, 8-Bit, 65Msps ADC INA+ T/H INA- CMA REFIO CMB INB+ T/H INB- CLK+ CLK- SYNC CS SERIAL PORT SCLK SDIN CONTROL REGISTERS SPEN Figure 2. Functional Diagram CMA INA+ 2kΩ 2kΩ INA- SAMPLING CLOCK *V PROGRAMMABLE FROM 0.45V TO ...

Page 15

INTERNAL GAIN—BYPASS REFIO EXTERNAL GAIN CONTROL—DRIVE REFIO REFIO 1.250V 10kΩ BANDGAP SCALE AND BUFFER REFERENCE LEVEL SHIFT Figure 4. Simplified Reference Schematic Table 1. Parallel-Interface Pin Functionality SPEN SDIN/FORMAT 0 SDIN AVDD 1 Unconnected ...

Page 16

Dual-Channel, 8-Bit, 65Msps ADC CS SCLK SDIN R R WRITE 1 = READ Figure 6. Serial-Interface Communication Cycle t CSS CS SCLK SDIN Figure 7. Serial-Interface Timing Diagram Serial Programming Interface A serial interface programs ...

Page 17

Register address 0Ah is a special-function register. Writing data 5Ah to register 0Ah initiates a register reset. When this operation is executed, all control registers Table 2. Register 0Ah Status Byte BIT NO. VALUE 7 0 Reserved 6 0 Reserved ...

Page 18

Dual-Channel, 8-Bit, 65Msps ADC In addition to power management, the HPS_SHDN1 and HPS_SHDN0 activate an A+B adder mode. In this mode, the results from both channels are averaged. Control Bits: HPS_SHDN0 STBY_SHDN0 HPS_SHDN1 STBY_SHDN1 ...

Page 19

Digital Output Power Management (02h) BIT 7 BIT Bit 7–4 Don’t care Bit 3, 2 PD_DOUT_1, PD_DOUT_0: Power-down digital output state control 00 = Digital output three state (default Digital output low 10 = Digital ...

Page 20

Dual-Channel, 8-Bit, 65Msps ADC Data/DCLK Timing (03h) BIT 7 BIT 6 BIT 5 DA_BYPASS DLY_HALF_T DCLKTIME_2 Bit 7 DA_BYPASS: Data aligner bypass 0 = Nominal 1 = Bypasses data aligner delay line to minimize output data latency with respect to ...

Page 21

CHA Data Output Termination Control (04h) BIT 7 BIT 6 BIT CT_DCLK_2_A Bit 7, 6 Don’t care Bit CT_DCLK_2_A, CT_DCLK_1_A, CT_DCLK_0_A: CHA DCLK termination control 000 = 50Ω (default) 001 = 75Ω 010 = ...

Page 22

Dual-Channel, 8-Bit, 65Msps ADC Clock Divide/Data Format/Test Pattern (06h) BIT 7 BIT 6 TEST_PATTERN TEST_DATA FORMAT_1 Bit 7 TEST_PATTERN: Test pattern selection 0 = Ramps from 0 to 255 (offset binary) and repeats (subsequent formatting applied) (default Data ...

Page 23

Common Mode (08h) BIT 7 BIT 6 CMI_SELF_B CMI_ADJ_2_B CMI_ADJ_1_B CMI_ADJ_0_B Bit 7 CMI_SELF_B: CHB connect input common-mode to analog inputs 0 = Internal common-mode voltage is NOT applied to inputs (default Internal common-mode voltage applied to analog ...

Page 24

Dual-Channel, 8-Bit, 65Msps ADC 100Ω TERMINATION (PROGRAMMABLE) CLK+ AVDD 5kΩ 50Ω 10kΩ 20kΩ 50Ω THRESHOLD 5kΩ GND CLK- SELF-BIAS TURNED OFF FOR SINGLE-ENDED CLOCK OR POWER-DOWN. Figure 8. Simplified Clock Input Schematic SAMPLING INSTANT t AD IN_ SAMPLE ON RISING ...

Page 25

SAMPLING INSTANT IN_ SAMPLE ON RISING EDGE SAMPLE CLOCK t DD CHB DATA, DOR n-10 DCLK SAMPLE CLOCK IS THE DERIVED CLOCK FROM (CLK+ - CLK-)/CLOCK DIVIDER, IN_ = IN_+ - IN_-. MUX_CH (BIT 2, OUTPUT FORMAT 01h) DETERMINES THE ...

Page 26

Dual-Channel, 8-Bit, 65Msps ADC SUV SYNC INPUT CLK (0) (1) 1x DIVIDED CLK (STATE) (1) ( SUV SYNC INPUT CLK (0) (1) (2) (1) (2) (3) 1x DIVIDED ...

Page 27

HO t SUV SYNC INPUT CLK (0) (1) 1x DIVIDED CLK (STATE) (1) ( SUV SYNC INPUT CLK (0) (1) (2) (1) (2) (3) 1x DIVIDED CLK (STATE) (2) (3) ...

Page 28

Dual-Channel, 8-Bit, 65Msps ADC Table 4. Data Timing Controls DATA TIMING CONTROL Data aligner bypass. When this control is active (high), data and DCLK delay is reduced by DA_BYPASS approximately 3.4ns (relative to DA_BYPASS = 0). When this control is ...

Page 29

FACTORY-DEFAULT NOMINAL DATA TIMING vs. SAMPLE RATE 2 1.8V OVDD DA_BYPASS = 1 1.5 1.0 0 SAMPLING RATE (Msps) Figure 13. Default Data Timing (V OVDD FACTORY-DEFAULT NOMINAL DATA TIMING vs. SAMPLING RATE 2.0 ...

Page 30

Dual-Channel, 8-Bit, 65Msps ADC Table 7. Recommended Timing Adjustments (V SAMPLING RATE (Msps) FROM Table 8. Allowed Settings of DCLKTIME and DTIME for DA_BYPASS = 1 DTIME<2:0> 111 (-3T/16) 111 (-3T/16) 110 (-2T/16) 110 (-2T/16); 111 (-3T/16) ...

Page 31

AVDD (PINS 1, 12, 13, 48) REFERENCE GND Figure 17. Integrated Voltage Regulator 36.5Ω 0.1µF 0. N.C. N.C. 0.1µ 36.5Ω MINI-CIRCUITS 0.5% ADT1-1WT Figure 18. Transformer-Coupled Input Drive for Input Frequencies ...

Page 32

Dual-Channel, 8-Bit, 65Msps ADC V IN 0.1µF MAX4108 100Ω 0.1µF 100Ω 0.1µF Figure 20. Single-Ended, AC-Coupled Input Drive The circuit of Figure 19 also converts a single-ended input signal to a fully differential signal. Figure 19 uti- lizes an additional ...

Page 33

Small-Signal Noise Floor (SSNF) SSNF is the integrated noise and distortion power in the Nyquist band for small-signal inputs. The DC offset is excluded from this noise calculation. For this converter, a small signal is defined as a single tone ...

Page 34

Dual-Channel, 8-Bit, 65Msps ADC TOP VIEW D2A D3A D4A D5A D6A D7A DORA DCLKA SDIN/FORMAT SCLK/DIV CS/OUTSEL AVDD For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package ...

Page 35

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 35 © 2010 Maxim Integrated Products ...

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