MAX1185ECM+D Maxim Integrated Products, MAX1185ECM+D Datasheet

IC ADC 10BIT 20MSPS DUAL 48-TQFP

MAX1185ECM+D

Manufacturer Part Number
MAX1185ECM+D
Description
IC ADC 10BIT 20MSPS DUAL 48-TQFP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX1185ECM+D

Number Of Bits
10
Sampling Rate (per Second)
20M
Number Of Converters
2
Power Dissipation (max)
2.43W
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
48-TQFP Exposed Pad, 48-eTQFP, 48-HTQFP, 48-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1185 is a 3V, dual 10-bit analog-to-digital con-
verter (ADC) featuring fully-differential wideband track-
and-hold (T/H) inputs, driving two pipelined, nine-stage
ADCs. The MAX1185 is optimized for low-power, high
dynamic performance applications in imaging, instru-
mentation, and digital communication applications. This
ADC operates from a single 2.7V to 3.6V supply, con-
suming only 105mW while delivering a typical signal-to-
noise ratio (SNR) of 59.5dB at an input frequency of
7.5MHz and a sampling rate of 20Msps. Digital outputs
A and B are updated alternating on the rising (CHA)
and falling (CHB) edge of the clock. The T/H driven
input stages incorporate 400MHz (-3dB) input ampli-
fiers. The converters may also be operated with single-
ended inputs. In addition to low operating power, the
MAX1185 features a 2.8mA sleep mode as well as a
1µA power-down mode to conserve power during idle
periods.
An internal 2.048V precision bandgap reference sets
the full-scale range of the ADC. A flexible reference
structure allows the use of this internal or an externally
derived reference, if desired for applications requiring
increased accuracy or a different input voltage range.
The MAX1185 features parallel, multiplexed, CMOS-
compatible three-state outputs. The digital output for-
mat can be set to two’s complement or straight offset
binary through a single control pin. The device provides
for a separate output power supply of 1.7V to 3.6V for
flexible interfacing. The MAX1185 is available in a 7mm
x 7mm, 48-pin TQFP package, and is specified for the
extended industrial (-40°C to +85°C) temperature
range.
Pin-compatible, nonmultiplexed. high-speed versions of
the MAX1185 are also available. Please refer to the
MAX1180 data sheet for 105Msps, the MAX1181 data
sheet for 80Msps, the MAX1182 data sheet for 65Msps,
the MAX1183 data sheet for 40Msps, and the MAX1184
data sheet for 20Msps.
19-2175; Rev 2; 4/10
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.
Internal Reference and Multiplexed Parallel Outputs
High Resolution Imaging
I/Q Channel Digitization
Multichannel IF Sampling
Instrumentation
Video Application
Ultrasound
Dual 10-Bit, 20Msps, 3V, Low-Power ADC with
________________________________________________________________ Maxim Integrated Products
General Description
Applications
o Single 3V Operation
o Excellent Dynamic Performance:
o Low Power:
o 0.02dB Gain and 0.25° Phase Matching
o Wide ±1Vp-p Differential Analog Input Voltage
o 400MHz, -3dB Input Bandwidth
o On-Chip 2.048V Precision Bandgap Reference
o Single 10-Bit Bus for Multiplexed, Digital Outputs
o User-Selectable Output Format—Two’s
o 48-Pin TQFP Package with Exposed Paddle For
* EP = Exposed paddle.
+ Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Pin-Compatible Versions table at end of data sheet.
MAX1185ECM
MAX1185ECM+
MAX1185ECM/V+
Range
Complement or Offset Binary
Improved Thermal Dissipation
59.5dB SNR at f
74dB SFDR at f
35mA (Normal Operation)
2.8mA (Sleep Mode)
1µA (Shutdown Mode)
PART
COM
INA+
INB+
NOTE: THE PIN 1 INDICATOR FOR LEAD-FREE
GND
INA-
GND
INB-
GND
V
V
V
CLK
DD
DD
DD
PACKAGES IS REPLACED BY A "+" SIGN.
10
11
12
1
2
3
4
5
6
7
8
9
EP
IN
IN
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
Ordering Information
= 7.5MHz
48 TQFP-EP
= 7.5MHz
MAX1185
RANGE
TEMP
Pin Configuration
PIN-PACKAGE
48 TQFP-EP*
48 TQFP-EP*
48 TQFP-EP*
Features
36
35
34
33
32
31
30
29
28
27
26
25
D1A/B
D0A/B
OGND
OV
OV
OGND
A/B
N.C.
N.C.
N.C.
N.C.
N.C.
DD
DD
1

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MAX1185ECM+D Summary of contents

Page 1

... High Resolution Imaging I/Q Channel Digitization Multichannel IF Sampling Instrumentation Video Application Ultrasound ________________________________________________________________ Maxim Integrated Products 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. o Single 3V Operation o Excellent Dynamic Performance: 59.5dB SNR at f 74dB SFDR at f ...

Page 2

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs ABSOLUTE MAXIMUM RATINGS GND ...............................................-0.3V to +3. OGND to GND.......................................................-0.3V to +0.3V INA+, INA-, INB+, INB- to GND ...............................-0. ...

Page 3

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs ELECTRICAL CHARACTERISTICS (continued 3V 2.5V, 0.1µF and 1µF capacitors from REFP, REFN, and COM to GND; REFOUT connected to REFIN through a DD ...

Page 4

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs ELECTRICAL CHARACTERISTICS (continued 3V 2.5V, 0.1µF and 1µF capacitors from REFP, REFN, and COM to GND; REFOUT connected to REFIN through a DD ...

Page 5

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs ELECTRICAL CHARACTERISTICS (continued 3V 2.5V, 0.1µF and 1µF capacitors from REFP, REFN, and COM to GND; REFOUT connected to REFIN through a DD ...

Page 6

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs ( 2.5V 2.048V, differential input at -0.5dBFS REFIN FFT PLOT CHA (DIFFERENTIAL INPUT, 8192-POINT DATA RECORD ...

Page 7

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs ( 2.5V 2.048V, differential input at -0.5dBFS REFIN FULL-POWER INPUT BANDWIDTH vs. ANALOG INPUT FREQUENCY, SINGLE-ENDED 6 4 ...

Page 8

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs ( 2.5V 2.048V, differential input at -0.5dBFS REFIN OFFSET ERROR vs. TEMPERATURE 0.2 0.1 0 -0.1 CHB -0.2 ...

Page 9

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs PIN NAME Common-Mode Voltage Input/Output. Bypass to GND with a ≥ 0.1µF capacitor. 1 COM Analog Supply Voltage. Bypass each supply pin to GND with a 0.1µF ...

Page 10

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs PIN NAME Three-State Digital Output, Bit 6. Depending on status of A/B, output data reflects channel A 41 D6A/B or channel B data. Three-State Digital Output, Bit ...

Page 11

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs V IN Σ T/H FLASH DAC ADC 1.5 BITS STAGE 1 STAGE 2 DIGITAL CORRECTION LOGIC T/H V INA Figure 1. Pipelined Architecture—Stage Blocks S4a INA+ INA- ...

Page 12

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs Analog Inputs and Reference The full-scale range of the MAX1185 is determined by the internally generated voltage difference between REFP ( ...

Page 13

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs CHA CHB t CLK CLK t t DOB DOA A/B CHB CHA CHB t DA/B D0A/B-D9A/B D0B D1A D1B Figure 3. Timing Diagram ...

Page 14

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs Table 1. MAX1185 Output Codes For Differential Inputs DIFFERENTIAL INPUT VOLTAGE 511/512 +FULL SCALE - 1LSB REF V x 1/512 REF ...

Page 15

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs 300Ω 300Ω 300Ω +5V 0.1µF INPUT MAX4108 0.1µF -5V 300Ω 300Ω 300Ω 300Ω +5V 0.1µF INPUT MAX4108 0.1µF -5V 300Ω 300Ω Figure 5. Typical Application for Single-Ended-to-Differential ...

Page 16

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs 0.1µ N.C. 0.1µ N.C. Figure 6. Transformer-Coupled Input Drive Static Parameter Definitions Integral Nonlinearity (INL) Integral nonlinearity is the deviation of the values ...

Page 17

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs V IN MAX4108 V IN MAX4108 Figure 7. Using an Op Amp for Single-Ended, AC-Coupled Input Drive quantization error (residual error). The ideal, theoretical minimum analog-to-digital noise ...

Page 18

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs Figure 8. Typical QAM Application, Using the MAX1185 CLK ANALOG INPUT SAMPLED DATA (T/H) HOLD TRACK T/H Figure 9. T/H Aperture Timing 18 ...

Page 19

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs V DD GND INA+ T/H INA- CLK INB+ T/H INB- REFOUT PART MAX1190 MAX1180 MAX1181 MAX1182 MAX1183 MAX1186 MAX1184 MAX1185 MAX1198 MAX1197 MAX1196 MAX1195 ______________________________________________________________________________________ PIPELINE DEC ...

Page 20

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. ...

Page 21

... 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 ____________________ 21 © 2010 Maxim Integrated Products ...

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