MAX1191ETI+ Maxim Integrated Products, MAX1191ETI+ Datasheet

IC ADC 8BIT 7.5MSPS DUAL 28-TQFN

MAX1191ETI+

Manufacturer Part Number
MAX1191ETI+
Description
IC ADC 8BIT 7.5MSPS DUAL 28-TQFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX1191ETI+

Number Of Bits
8
Sampling Rate (per Second)
7.5M
Data Interface
Parallel
Number Of Converters
2
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-WFQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1191 is an ultra-low-power, dual, 8-bit,
7.5Msps analog-to-digital converter (ADC). The device
features two fully differential wideband track-and-hold
(T/H) inputs. These inputs have a 440MHz bandwidth
and accept fully differential or single-ended signals.
The MAX1191 delivers a typical signal-to-noise and dis-
tortion (SINAD) of 48.6dB at an input frequency of
1.875MHz and a sampling rate of 7.5Msps while con-
suming only 12mW. This ADC operates from a 2.7V to
3.6V analog power supply. A separate 1.8V to 3.6V
supply powers the digital output driver. In addition to
ultra-low operating power, the MAX1191 features three
power-down modes to conserve power during idle peri-
ods. Excellent dynamic performance, ultra-low power,
and small size make the MAX1191 ideal for applica-
tions in imaging, instrumentation, and digital communi-
cations.
An internal 1.024V precision bandgap reference sets
the full-scale range of the ADC to ±0.512V. A flexible
reference structure allows the MAX1191 to use its inter-
nal reference or accept an externally applied reference
for applications requiring increased accuracy.
The MAX1191 features parallel, multiplexed, CMOS-
compatible tri-state outputs. The digital output format is
offset binary. A separate digital power input accepts a
voltage from 1.8V to 3.6V for flexible interfacing to dif-
ferent logic levels. The MAX1191 is available in a 5mm
× 5mm, 28-pin thin QFN package, and is specified for
the extended industrial (-40°C to +85°C) temperature
range.
For higher sampling frequency applications, refer to the
MAX1195–MAX1198 dual 8-bit ADCs. Pin-compatible
versions of the MAX1191 are also available. Refer to the
MAX1192 data sheet for 22Msps, and the MAX1193
data sheet for 45Msps.
19-2836; Rev 1; 9/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Ultrasound and Medical Imaging
IQ Baseband Sampling
Battery-Powered Portable Instruments
Low-Power Video
WLAN, Mobile DSL, WLL Receiver
Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC
________________________________________________________________ Maxim Integrated Products
General Description
Applications
o Ultra-Low Power
o Excellent Dynamic Performance
o 2.7V to 3.6V Single Analog Supply
o 1.8V to 3.6V TTL/CMOS-Compatible Digital
o Fully Differential or Single-Ended Analog Inputs
o Internal/External Reference Option
o Multiplexed CMOS-Compatible Tri-State Outputs
o 28-Pin Thin QFN Package
o Evaluation Kit Available (Order MAX1193EVKIT)
*EP = Exposed paddle.
MAX1191ETI-T
Outputs
TOP VIEW
12mW (Normal Operation: 7.5Msps)
0.3µW (Shutdown Mode)
48.7dB SNR at f
69dBc SFDR at f
PART
INA+
GND
GND
INB+
INB-
INA-
CLK
1
2
3
4
5
6
7
EXPOSED PADDLE
-40°C to +85°C
TEMP RANGE
5mm x 5mm THIN QFN
IN
Ordering Information
IN
= 1.875MHz
= 1.875MHz
MAX1191
Pin Configuration
PIN-PACKAGE
28 Thin QFN-EP*
(5mm x 5mm)
Features
21
20
19
18
17
16
15
D0
D1
D2
D3
A/B
D4
D5
1

Related parts for MAX1191ETI+

MAX1191ETI+ Summary of contents

Page 1

... Ultrasound and Medical Imaging IQ Baseband Sampling Battery-Powered Portable Instruments Low-Power Video WLAN, Mobile DSL, WLL Receiver ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. o Ultra-Low Power 12mW (Normal Operation: 7.5Msps) 0.3µ ...

Page 2

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC ABSOLUTE MAXIMUM RATINGS GND ...............................................-0.3V to +3. OGND to GND.......................................................-0.3V to +0.3V INA+, INA-, INB+, INB- to GND .................-0. CLK, REFIN, REFP, REFN, COM to GND ...-0.3V ...

Page 3

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC ELECTRICAL CHARACTERISTICS (continued 3.0V 1.8V REFIN = 0.33µ -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL Spurious-Free Dynamic ...

Page 4

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC ELECTRICAL CHARACTERISTICS (continued 3.0V 1.8V REFIN DD = 0.33µ -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL Maximum ...

Page 5

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC ELECTRICAL CHARACTERISTICS (continued 3.0V 1.8V REFIN = 0.33µ -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL Analog Supply ...

Page 6

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC ELECTRICAL CHARACTERISTICS (continued 3.0V 1.8V REFIN DD = 0.33µ -40°C to +85°C, unless otherwise noted. Typical values are Note 1: Specifications ...

Page 7

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC (V = 3.0V 1.8V REFIN 7.500567MHz at 50% duty cycle +25°C, unless otherwise noted.) A FFT PLOT CHANNEL A (SINGLE-ENDED INPUTS, 8192-POINT DATA RECORD ...

Page 8

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC (V = 3.0V 1.8V REFIN DD 7.500567MHz at 50% duty cycle +25°C, unless otherwise noted.) A SIGNAL-TO-NOISE RATIO vs. ANALOG INPUT FREQUENCY ...

Page 9

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC (V = 3.0V 1.8V REFIN 7.500567MHz at 50% duty cycle +25°C, unless otherwise noted.) A SIGNAL-TO-NOISE RATIO vs. ANALOG INPUT POWER 2.017059MHz IN ...

Page 10

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC (V = 3.0V 1.8V REFIN DD 7.500567MHz at 50% duty cycle +25°C, unless otherwise noted.) A SIGNAL-TO-NOISE RATIO vs. SAMPLING RATE 2.017059MHz IN ...

Page 11

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC (V = 3.0V 1.8V REFIN 7.500567MHz at 50% duty cycle +25°C, unless otherwise noted.) A SIGNAL-TO-NOISE RATIO vs. CLOCK DUTY CYCLE 2.017059MHz IN ...

Page 12

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC (V = 3.0V 1.8V REFIN DD 7.500567MHz at 50% duty cycle +25°C, unless otherwise noted.) A INTEGRAL NONLINEARITY 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 ...

Page 13

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC (V = 3.0V 1.8V REFIN 7.500567MHz at 50% duty cycle +25°C, unless otherwise noted.) A SUPPLY CURRENT vs. INPUT FREQUENCY 0.9 DIGITAL SUPPLY CURRENT 0.8 0.7 ...

Page 14

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC PIN NAME 23 PD0 Power-Down Digital Input 0. See Table 3. 24 REFIN Reference Input. Internally pulled COM Common-Mode Voltage I/O. Bypass COM to GND with a 0.33µF capacitor. Negative Reference ...

Page 15

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC S4a INA+ INA- S4b S4a INB+ INB- S4b Figure 3. Internal T/H Circuits Input Track-and-Hold (T/H) Circuits Figure 3 displays a simplified functional diagram of the input T/H circuits. In track mode, switches S1, S2a, ...

Page 16

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC Table 1. Reference Modes V REFIN Internal reference mode. V >0 each with a 0.33µF capacitor. Buffered external reference mode. An external 1.024V ±10% reference voltage is applied to 1.024V ±10% REFIN. ...

Page 17

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC CHA CHB t CLK CLK t t DOB DOA A/B CHB CHA CHB t DA/B D0–D7 D0B D1A D1B Figure 5. System Timing Diagram provide lowest possible jitter. Any significant aperture ...

Page 18

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC Table 2. Output Codes vs. Input Voltage DIFFERENTIAL INPUT VOLTAGE (IN+ - IN-) 127 × V REF 128 126 × V REF 128 1 × V REF 128 0 × V REF 128 1 × ...

Page 19

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC R1 600Ω 0.5V TO 1.5V COM = ±85mV V SIG P 300Ω 600Ω OPERATIONAL AMPLIFIERS CHOOSE EITHER OF THE MAX4452/MAX4453/MAX4454 SINGLE/ DUAL/QUAD +3V, 200MHz OP AMPS FOR USE WITH THIS CIRCUIT. ...

Page 20

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC 25Ω 22pF 0.1µ N.C. 2.2µF 0.1µ MINICIRCUITS TT1-6-KK81 25Ω 22pF 25Ω 22pF 0.1µ N.C. 2.2µF 0.1µ MINICIRCUITS ...

Page 21

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC 3V 1.248V 0.1µ MAX6061 10Hz 1% LOWPASS 20kΩ FILTER 3 1% 1µF 90.9kΩ 3 NOTE: ONE FRONT-END REFERENCE CIRCUIT PROVIDES ±15mA OF OUTPUT DRIVE AND SUPPORTS OVER 1000 MAX1191s. MAX4250 4 Figure 10. ...

Page 22

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC 3V 2.500V 1 0.1µF 2 MAX6066 3 1µF NOTE: ONE FRONT-END REFERENCE CIRCUIT SUPPORTS UP TO 160 MAX1191s. 3V UNCOMMITTED 1MΩ 0.1µ 1/4 14 MAX4254 1MΩ Figure 11. External Unbuffered Reference ...

Page 23

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC Figure 12. Typical QAM Receiver Application Typical QAM Demodulation Application Quadrature amplitude modulation (QAM) is frequently used in digital communications. Typically found in spread-spectrum-based systems, a QAM signal repre- sents a carrier frequency modulated in ...

Page 24

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC CLK ANALOG INPUT SAMPLED DATA (T/H) HOLD TRACK T/H Figure 13. T/H Aperture Timing Static Parameter Definitions Integral Nonlinearity (INL) Integral nonlinearity is the deviation of the values on an actual ...

Page 25

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC Total Harmonic Distortion (THD) THD is typically the ratio of the RMS sum of the first five harmonics of the input signal to the fundamental itself. This is expressed as:  ...

Page 26

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) D D/2 PIN # 1 I. ______________________________________________________________________________________ 0. ...

Page 27

... 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 ____________________ 27 © 2003 Maxim Integrated Products ...

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