MAX1079ETC Maxim Integrated, MAX1079ETC Datasheet

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MAX1079ETC

Manufacturer Part Number
MAX1079ETC
Description
Analog to Digital Converters - ADC
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX1079ETC

Number Of Channels
1
Architecture
SAR
Conversion Rate
1.5 MSPs
Resolution
10 bit
Input Type
Differential
Snr
No
Interface Type
3-Wire, Microwire, QSPI, Serial, SPI
Operating Supply Voltage
3.3 V
Maximum Operating Temperature
+ 85 C
Package / Case
TQFN EP
Maximum Power Dissipation
1349 mW
Minimum Operating Temperature
- 40 C
Number Of Converters
1
Voltage Reference
Internal
The MAX1077/MAX1079 are low-power, high-speed, seri-
al-output, 10-bit, analog-to-digital converters (ADCs) that
operate at up to 1.5Msps and have an internal reference.
These devices feature true-differential inputs, offering bet-
ter noise immunity, distortion improvements, and a wider
dynamic range over single-ended inputs. A standard
SPI™/QSPI™/MICROWIRE™ interface provides the clock
necessary for conversion. These devices easily interface
with standard digital signal processor (DSP) synchronous
serial interfaces.
The MAX1077/MAX1079 operate from a single +2.7V to
+3.6V supply voltage. The MAX1077/MAX1079 include a
2.048V internal reference. The MAX1077 has a unipolar
analog input, while the MAX1079 has a bipolar analog
input. These devices feature a partial power-down mode
and a full power-down mode for use between conver-
sions, which lower the supply current to 2mA (typ) and
1µA (max), respectively. Also featured is a separate
power-supply input (V
+1.8V to V
low-power dissipation, excellent AC performance, and DC
accuracy (±0.5 LSB INL) make the MAX1077/MAX1079
ideal for industrial process control, motor control, and
base-station applications.
The MAX1077/MAX1079 come in a 12-pin TQFN pack-
age, and are available in the extended (-40°C to +85°C)
temperature range.
19-3363; Rev 1; 3/11
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
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.
Differential, 10-Bit ADCs with Internal Reference
TOP VIEW
Data Acquisition
Bill Validation
Motor Control
DD
RGND
AIN-
REF
digital logic. The fast conversion speed,
1
2
3
+
________________________________________________________________ Maxim Integrated Products
1.5Msps, Single-Supply, Low-Power, True-
L
AIN+
V
), which allows direct interfacing to
12
4
DD
General Description
MAX1077
MAX1079
TQFN
N.C.
N.C.
11
5
Pin Configuration
Communications
Portable Instruments
SCLK
GND
10
6
EP
Applications
9
8
7
CNVST
DOUT
V
L
o 1.5Msps Sampling Rate
o Only 22mW (typ) Power Dissipation
o Only 1µA (max) Shutdown Current
o High-Speed, SPI-Compatible, 3-Wire Serial Interface
o 61dB S/(N + D) at 525kHz Input Frequency
o Internal True-Differential Track/Hold (T/H)
o Internal 2.048V Reference
o No Pipeline Delays
o Small 12-Pin TQFN Package
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*EP = Exposed pad.
MAX1077ETC+T
MAX1079ETC+T
+2.7V TO +3.6V
4.7µF
DIFFERENTIAL
PART
10µF
VOLTAGE
INPUT
0.01µF
+
-
Typical Operating Circuit
0.01µF
-40°C to +85°C 12 TQFN-EP*
-40°C to +85°C 12 TQFN-EP*
TEMP RANGE
AIN+
AIN-
REF
RGND
V
Ordering Information
DD
MAX1077
MAX1079
+1.8V TO V
GND
V
CNVST
L
DOUT
0.01µF
SCLK
PIN-
PACKAGE
DD
Features
10µF
µC/DSP
Unipolar
Bipolar
INPUT
1

Related parts for MAX1079ETC

MAX1079ETC Summary of contents

Page 1

... Only 1µA (max) Shutdown Current o High-Speed, SPI-Compatible, 3-Wire Serial Interface o 61dB S/( 525kHz Input Frequency o Internal True-Differential Track/Hold (T/H) o Internal 2.048V Reference o No Pipeline Delays o Small 12-Pin TQFN Package PART MAX1077ETC+T MAX1079ETC+T + Denotes a lead(Pb)-free/RoHS-compliant package Tape and reel. *EP = Exposed pad. +2.7V TO +3.6V 10µF 9 CNVST DIFFERENTIAL ...

Page 2

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0. GND ................-0.3V to the lower Digital Inputs to GND .................-0.3V to the lower of (V ...

Page 3

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference ELECTRICAL CHARACTERISTICS (continued +2.7V to +3.6V SCLK +25°C.) A PARAMETER SYMBOL ANALOG INPUTS (AIN+, AIN-) Differential Input ...

Page 4

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference TIMING CHARACTERISTICS (V = +2.7V to +3.6V SCLK +25°C.) A PARAMETER SYMBOL SCLK Pulse-Width High SCLK Pulse-Width Low SCLK ...

Page 5

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference (V = +3V 24MHz SCLK +25°C.) MAXIMUM RECOMMENDED f vs. V SCLK 1.8 2.1 2.4 ...

Page 6

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference (V = +3V 24MHz SCLK +25°C.) DYNAMIC PERFORMANCE vs. INPUT FREQUENCY (MAX1077) 62.0 SNR AND SINAD 61.5 61.0 60.5 60.0 ...

Page 7

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference (V = +3V 24MHz SCLK +25°C FULL POWER-DOWN DD L SUPPLY CURRENT vs. TEMPERATURE 1.00 0.80 0.60 V ...

Page 8

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference PIN NAME 1 AIN- Negative Analog Input Reference Voltage Output. Internal 2.048V reference output. Bypass REF with a 0.01µF capacitor and 2 REF a 4.7µF capacitor to RGND. 3 RGND ...

Page 9

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference V DD REF REF 2.048V AIN+ 10-BIT T/H SAR ADC AIN- LOGIC AND RGND MAX1077 MAX1079 Figure 3. Functional Diagram Serial Interface Initialization After Power-Up and Starting a Conversion Upon ...

Page 10

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference CNVST t SETUP SCLK HIGH IMPEDANCE DOUT Figure 5. Interface-Timing Sequence CNVST ONE 8-BIT TRANSFER SCLK 1ST SCLK RISING EDGE DOUT MODE NORMAL REF ...

Page 11

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference Applications Information Internal Reference The MAX1077/MAX1079 have an on-chip voltage refer- ence trimmed to 2.048V. The internal reference output is connected to REF and also drives the internal capac- itive ...

Page 12

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference CNVST SCLK 1 DOUT Figure 10. Continuous Conversion with Burst/Continuous Clock A) SPI B) QSPI C) MICROWIRE Figure 11. Common Serial-Interface Connections to the MAX1077/MAX1079 12 ______________________________________________________________________________________ ...

Page 13

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference CNVST 1 SCLK HIGH-Z DOUT Figure 12. SPI/MICROWIRE Serial-Interface Timing—Single Conversion (CPOL = CPHA = 0), (CPOL = CPHA = 1) CNVST SCLK DOUT Figure 13. ...

Page 14

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference V L MAX1077 SCLK MAX1079 CNVST DOUT Figure 15. Interfacing to the TMS320C54_ Internal Clocks SCLK, and the transmit frame sync (FSX) drives the receive frame sync (FSR) and CNVST. ...

Page 15

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference CNVST SCLK DOUT Figure 17. DSP Interface—Continuous Conversion CNVST SCLK DOUT Figure 18. DSP Interface—Single-Conversion, Continuous/Burst Clock transmit-data register more ...

Page 16

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference V L MAX1077 SCLK MAX1079 CNVST DOUT Figure 19. Interfacing to the ADSP21_ _ _ Aperture delay ( the time defined between the AD falling edge of CNVST ...

Page 17

Single-Supply, Low-Power, True- Differential, 10-Bit ADCs with Internal Reference Full-Linear Bandwidth Full-linear bandwidth is the frequency at which the sig- nal-to-noise plus distortion (SINAD) is equal to 56dB. Intermodulation Distortion Any device with nonlinearities creates distortion prod- ucts when ...

Page 18

... 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. 18 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2011 Maxim Integrated Products ...

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