MAX1379EVKIT+ Maxim Integrated Products, MAX1379EVKIT+ Datasheet

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MAX1379EVKIT+

Manufacturer Part Number
MAX1379EVKIT+
Description
EVAL KIT FOR MAX1379
Manufacturer
Maxim Integrated Products
Datasheets
1.MAX1377ATP.pdf (25 pages)
2.MAX1379EVKIT.pdf (19 pages)

Specifications of MAX1379EVKIT+

Number Of Adc's
2
Number Of Bits
12
Sampling Rate (per Second)
1.25M
Data Interface
Serial
Inputs Per Adc
2 Single
Input Range
±VREF/2
Power (typ) @ Conditions
85.5mW @ 1.25MSPS
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 125°C
Utilized Ic / Part
MAX1379
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1377/MAX1379/MAX1383 feature two simulta-
neous-sampling, low-power, 12-bit ADCs with serial
interface and internal voltage reference. Fast sampling
rate, low power dissipation, and excellent dynamic per-
formance make the MAX1377/MAX1379/MAX1383
ideal for industrial process control, motor control, and
RF applications.
Conversion results are available through a SPI™-/
QSPI™-/MICROWIRE™-/DSP-compatible interface with
independent serial digital outputs for each channel. The
serial outputs allow twice as much data to be transferred
at the given clock rate. The conversion results for both
ADCs can also be output on a single digital output for
microcontrollers (µCs) and DSPs with only a single serial
input available.
The MAX1377 operates from a 2.7V to 3.6V analog sup-
ply and the MAX1379/MAX1383 operate from a 4.75V
to 5.25V analog supply. A separate 1.8V to AVDD digi-
tal supply allows interfacing to low voltage logic without
the use of level translators.
Two power-down modes, partial and full, allow the
MAX1377/MAX1379 and MAX1383 (full power-down only)
to save power between conversions. Partial power-down
mode reduces the supply current to 2mA while leaving
the reference enabled for quick power-up. Full power-
down mode reduces the supply current to 1µA.
The MAX1377/MAX1379 inputs accept voltages
between zero and the reference voltage or ±V
The MAX1383 offers an input voltage range of ±10V,
which is ideal for industrial and motor-control applica-
tions. The input to each of the ADCs supports either a
true-differential input or two single-ended inputs.
The MAX1377/MAX1379/MAX1383 are available in a
20-pin TQFN package, and are specified for the automo-
tive (-40°C to +125°C) temperature range.
19-4126; Rev 1; 2/09
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
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.
MAX1377ATP+
MAX1379ATP+
MAX1383ATP+
Dual, 12-Bit, 1.25Msps Simultaneous-Sampling
Motor Control
Communications
Data Acquisition
PART
________________________________________________________________ Maxim Integrated Products
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
TEMP RANGE
Ordering Information
General Description
Bill Validation
Portable Instruments
Applications
PIN-PACKAGE
20 TQFN-EP*
20 TQFN-EP*
20 TQFN-EP*
REF
ADCs with Serial Interface
/2.
♦ Dual, Simultaneous-Sampling, 12-Bit Successive
♦ 2 x 2 Mux Inputs or Two Differential Inputs
♦ 1.25Msps Sampling Rate per ADC
♦ Internal or External Reference
♦ Excellent Dynamic Performance
♦ 2.7V to 3.6V Low-Power Operation (MAX1377)
♦ 4.75V to 5.25V Low-Power Operation (MAX1379)
♦ 4.75V to 5.25V Low-Power Operation (MAX1383)
♦ 20MHz, SPI-Compatible, 3-Wire Serial Interface
♦ Input Range: ±10V (MAX1383), 0–V
♦ Small 20-Pin TQFN Package
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Pin Configuration appears at end of data sheet.
Approximation Register (SAR) ADCs
User-Selectable Single (0.625Msps max) or Dual
Outputs (1.25Msps max)
±V
REFSEL
AIN1A
AIN2A
AIN2B
AIN1B
RGND
70dB SINAD (MAX1377)
71dB SINAD (MAX1379/MAX1383)
84dBc/SFDR
1MHz Full-Linear Bandwidth
50mW (Normal Operation)
6mW (Partial Power-Down)
3µW (Full Power-Down)
90mW (Normal Operation)
10mW (Partial Power-Down)
5µW (Full Power-Down)
280mW (Normal Operation)
2.5µW (Full Power-Down)
REF
REF
/2 (MAX1377/MAX1379)
MUX
MUX
SEL
A = 1
T/H
T/H
AGND
REFERENCE
INTERNAL
AVDD
Functional Diagram
12-BIT
SAR
ADC2
12-BIT
ADC1
SAR
DGND
OUTPUT
BUFFER
OUTPUT
BUFFER
REF
V
AND TIMING
INTERFACE
CONTROL
L
SERIAL
LOGIC
V
Features
L
MAX1377
MAX1379
MAX1383
or
DOUT1
CS
CNVST
SCLK
U/B
S/D
DOUT2
1

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MAX1379EVKIT+ Summary of contents

Page 1

... MAX1383ATP+ -40°C to +125°C + Denotes a lead(Pb)-free/RoHS-compliant package Exposed pad. ________________________________________________________________ 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. ADCs with Serial Interface ♦ Dual, Simultaneous-Sampling, 12-Bit Successive Approximation Register (SAR) ADCs ♦ ...

Page 2

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling ADCs with Serial Interface ABSOLUTE MAXIMUM RATINGS AVDD to AGND ........................................................-0. DGND ..............................................................-0.3V to +6V L SCLK, CS, CNVST, U/B, S/D, SEL, REFSEL to DGND.......................................-0. DOUT_ to DGND ...........................................-0.3V to ...

Page 3

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling ELECTRICAL CHARACTERISTICS—MAX1377 (continued 2.7V to 3.6V 1.8V to AVDD, f AVDD L 1µ unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL ...

Page 4

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling ADCs with Serial Interface ELECTRICAL CHARACTERISTICS—MAX1377 (continued 2.7V to 3.6V 1.8V to AVDD, f AVDD L 1µ unless otherwise noted. Typical values are ...

Page 5

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling ELECTRICAL CHARACTERISTICS—MAX1379 (continued 4.75V to 5.25V 3V, f AVDD L SCLK unless otherwise noted. Typical values are at T MIN MAX PARAMETER SYMBOL Track-and-Hold Acquisition Time Aperture Delay ...

Page 6

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling ADCs with Serial Interface ELECTRICAL CHARACTERISTICS—MAX1379 (continued 4.75V to 5.25V 3V, f AVDD L SCLK unless otherwise noted. Typical values are at T MIN MAX PARAMETER SYMBOL Analog ...

Page 7

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling ELECTRICAL CHARACTERISTICS—MAX1383 (continued 4.75V to 5.25V 1.8V to AVDD, f AVDD L 1µ unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL ...

Page 8

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling ADCs with Serial Interface TIMING CHARACTERISTICS (Figures 6, 10 4.25V to 5.25V 1.8V to AVDD, V AVDD unless otherwise noted. Typical values are at T MAX PARAMETER SYMBOL SCLK ...

Page 9

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling (V = 5V/3V 3V 20MHz, T AVDD L SCLK MAX1377 UNIPOLAR FFT 1.25MHz SAMPLE - 20MHz SCLK f = 100kHz IN SINAD = 69.324dB -40 SNR = ...

Page 10

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling ADCs with Serial Interface (V = 5V/3V 3V 20MHz, T AVDD L SCLK MAX1379 UNIPOLAR DNL vs. DIGITAL OUTPUT CODE 1.0 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 0 ...

Page 11

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling (V = 5V/3V 3V 20MHz, T AVDD L SCLK MAX1379 INTERMODULATION PLOT 1.8Msps SAMPLE f = 28.8MHz -20 SCLK f = 250kHz IN1 f = 300kHz IN1 -40 IMD ...

Page 12

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling ADCs with Serial Interface (V = 5V/3V 3V 20MHz, T AVDD L SCLK MAX1383 BIPOLAR INL vs. DIGITAL OUTPUT CODE 1.0 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 0 ...

Page 13

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling (V = 5V/3V 3V 20MHz, T AVDD L SCLK MAX1383 AVDD SUPPLY CURRENT vs. TEMPERATURE CONVERTING AT 1.25Msps 50 48 STATIC -40 -25 - ...

Page 14

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling ADCs with Serial Interface PIN NAME Reference-Select Input. Drive REFSEL high to select external reference mode and power down the 1 REFSEL internal reference. Drive REFSEL low to select internal reference mode. Internal Reference Output/External Reference ...

Page 15

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling Detailed Description The MAX1377/MAX1379/MAX1383 use an input track and hold (T/H) and SAR circuitry to convert an analog input signal to a digital 12-bit output. The dual serial interface requires a minimum of three digital lines ...

Page 16

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling ADCs with Serial Interface the MAX1383, the signal bandwidth is limited to 100kHz by specification. Since ±10V signals are divided down to a 2.5V range, this version should only be used with sig- nals greater than ...

Page 17

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling The internal reference is continuously powered-up dur- ing both normal and partial power-down modes. In full power-down mode, the internal reference is disabled. Allow at least 2ms recovery time after a power-on reset or exiting full ...

Page 18

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling ADCs with Serial Interface CS CNVST SCLK 1 Figure 8. Dual-Output CNVST Transition Modes SINGLE CONVERSION CNVST 1 SCLK DOUT_ HIGH-Z CONTINUOUS CONVERSION CNVST 1 SCLK DOUT_ *CNVST MUST GO ...

Page 19

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling Single-/Dual-Output Modes (S/D) In dual-output mode, conversion results from the two channels appear on separate outputs. DOUT1 outputs the result from channel 1 and DOUT2 outputs the result from channel 2. Drive S/D low to operate ...

Page 20

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling ADCs with Serial Interface CNVST SCLK 1 3 1ST SCLK RISING EDGE 0 DOUT_ 0 0 MODE REF Figure 11. Partial Power-Down Timing Sequence CNVST SCLK 1ST SCLK RISING EDGE DOUT_ 0 0 D11 0 NORMAL ...

Page 21

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling For CPOL = 0 and CPHA = 0 or CPOL = 1 and CPHA = 1, the data is clocked into the µC on the rising edge of SCLK. For CPOL = 0 and CPHA = ...

Page 22

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling ADCs with Serial Interface MISO1 DSP-BASED DIGITAL PROCESSING ENGINE MISO2 IGBT CURRENT DRIVERS CURRENT SENSORS I PHASE1 PHASE PHASE3 PHASE1 PHASE2 Figure 16. Three-Phase Motor Control 22 ______________________________________________________________________________________ MAX1383 ...

Page 23

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling Wireless Communication Use the MAX1377/MAX1379/MAX1383 in a variety of wireless communication systems. These devices allow precise, simultaneous sampling of the I and Q signals of quadrature RF receiver systems. Figure 17 shows the MAX1377 in a ...

Page 24

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling ADCs with Serial Interface zation noise only. With an input range equal to the full- scale range of the ADC, calculate the ENOB as follows: SINAD 1 76 ⎛ − ENOB = ⎜ ⎝ ...

Page 25

... 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 ____________________ 25 © 2009 Maxim Integrated Products ...

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