MAX1075ETC-T Maxim Integrated, MAX1075ETC-T Datasheet

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MAX1075ETC-T

Manufacturer Part Number
MAX1075ETC-T
Description
Analog to Digital Converters - ADC
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX1075ETC-T

Number Of Channels
1
Architecture
SAR
Conversion Rate
1.8 MSPs
Resolution
10 bit
Input Type
Differential
Snr
No
Interface Type
3-Wire, Microwire, QSPI, Serial, SPI
Operating Supply Voltage
5 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
External
The MAX1072/MAX1075 low-power, high-speed, serial-
output, 10-bit, analog-to-digital converters (ADCs) oper-
ate at up to 1.8Msps. These devices feature true-differen-
tial inputs, offering better 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 MAX1072/MAX1075 operate from a single +4.75V to
+5.25V supply voltage and require an external reference.
The MAX1072 has a unipolar analog input, while the
MAX1075 has a bipolar analog input. These devices fea-
ture a partial power-down mode and a full power-down
mode for use between conversions, which lower the sup-
ply current to 1mA (typ) and 1µA (max), respectively. Also
featured is a separate power-supply input (V
allows direct interfacing to +1.8V to V
fast conversion speed, low-power dissipation, excellent
AC performance, and DC accuracy (±0.5 LSB INL) make
the MAX1072/MAX1075 ideal for industrial process con-
trol, motor control, and base-station applications.
The MAX1072/MAX1075 come in a 12-pin TQFN pack-
age, and are available in the extended (-40°C to +85°C)
temperature range.
19-3153; Rev 1; 4/09
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.
TOP VIEW
Data Acquisition
Bill Validation
Motor Control
Communications
Portable Instruments
RGND
AIN-
REF
1
2
3
________________________________________________________________ Maxim Integrated Products
AIN+
V
12
4
DD
General Description
MAX1072
MAX1075
TQFN
N.C.
N.C.
11
5
Pin Configuration
1.8Msps, Single-Supply, Low-Power,
SCLK
GND
10
6
Applications
DD
9
8
7
digital logic. The
CNVST
DOUT
V
L
True-Differential, 10-Bit ADCs
L
), which
♦ 1.8Msps Sampling Rate
♦ Only 45mW (typ) Power Dissipation
♦ Only 1µA (max) Shutdown Current
♦ High-Speed, SPI-Compatible, 3-Wire Serial Interface
♦ 61dB S/(N + D) at 525kHz Input Frequency
♦ Internal True-Differential Track/Hold (T/H)
♦ External Reference
♦ No Pipeline Delays
♦ Small 12-Pin TQFN Package
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
MAX1072ETC+T
MAX1075ETC+T
+4.75V TO +5.25V
REF
4.7μF
DIFFERENTIAL
10μF
PART
VOLTAGE
INPUT
0.01μF
+
-
Typical Operating Circuit
0.01μF
-40°C to +85°C 12 TQFN
-40°C to +85°C 12 TQFN
TEMP RANGE
AIN+
AIN-
REF
RGND
Ordering Information
V
DD
MAX1072
MAX1075
+1.8V TO V
GND
V
CNVST
L
DOUT
PIN-
PACKAGE
0.01μF
SCLK
DD
Features
10μF
μC/DSP
Unipolar
Bipolar
INPUT
1

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MAX1075ETC-T Summary of contents

Page 1

... S/( 525kHz Input Frequency ♦ Internal True-Differential Track/Hold (T/H) ♦ External Reference ♦ No Pipeline Delays ♦ Small 12-Pin TQFN Package ), which L digital logic. The DD Applications PART MAX1072ETC+T MAX1075ETC+T + Denotes a lead(Pb)-free/RoHS-compliant package Tape and reel. +4.75V TO +5.25V 10μF 9 CNVST DIFFERENTIAL 8 DOUT INPUT VOLTAGE ...

Page 2

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

Page 3

Single-Supply, Low-Power, ELECTRICAL CHARACTERISTICS (continued +5V ±5 4.096V REF values are +25°C.) A PARAMETER SYMBOL ANALOG INPUTS (AIN+, AIN-) Differential Input Voltage Range Absolute ...

Page 4

Single-Supply, Low-Power, True-Differential, 10-Bit ADCs TIMING CHARACTERISTICS (V = +5V ±5 4.096V REF values are +25°C.) A PARAMETER SYMBOL SCLK Pulse-Width High SCLK Pulse-Width Low SCLK ...

Page 5

Single-Supply, Low-Power +5V 4.096V REF +25°C.) INTEGRAL NONLINEARITY vs. DIGITAL OUTPUT CODE (MAX1072) 0.2 0.1 0 -0.1 -0.2 0 200 400 600 800 1000 1200 DIGITAL OUTPUT ...

Page 6

Single-Supply, Low-Power, True-Differential, 10-Bit ADCs (V = +5V 4.096V REF +25°C.) FFT PLOT (MAX1075 2Msps SAMPLE f = 32MHz -20 SCLK f = 100kHz IN SINAD ...

Page 7

Single-Supply, Low-Power +5V 4.096V REF +25°C.) V PARTIAL/FULL POWER-DOWN L SUPPLY CURRENT vs. TEMPERATURE 200 150 28.8MHz SCLK 100 V = ...

Page 8

Single-Supply, Low-Power, True-Differential, 10-Bit ADCs PIN NAME 1 AIN- Negative Analog Input External Reference Voltage Input REF capacitor and a 4.7µF capacitor to RGND. 3 RGND Reference Ground. Connect RGND to GND. Positive Analog Supply Voltage (+4.75V ...

Page 9

Single-Supply, Low-Power REF AIN + 10-BIT T/H SAR ADC AIN - CONTROL LOGIC AND TIMING MAX1072 MAX1075 RGND Figure 3. Functional Diagram Serial Interface Initialization After Power-Up and Starting a Conversion Upon initial power-up, the MAX1072/MAX1075 require ...

Page 10

Single-Supply, Low-Power, True-Differential, 10-Bit ADCs CNVST t SETUP 1 2 SCLK HIGH IMPEDANCE DOUT Figure 5. Interface-Timing Sequence CNVST SCLK 1ST SCLK RISING EDGE DOUT 0 0 MODE Figure 6. SPI Interface—Partial Power-Down Mode CNVST FIRST 8-BIT TRANSFER SCLK ...

Page 11

Single-Supply, Low-Power, Applications Information External Reference An external reference is required for the MAX1072/ MAX1075. Use a 4.7µF and 0.01µF bypass capacitor on the REF pin for best performance. The reference input structure allows a voltage range of +1V ...

Page 12

Single-Supply, Low-Power, True-Differential, 10-Bit ADCs 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 MAX1072/MAX1075 12 ______________________________________________________________________________________ ...

Page 13

Single-Supply, Low-Power, CNVST 1 SCLK HIGH-Z DOUT D9 Figure 12. SPI/MICROWIRE Serial-Interface Timing—Single Conversion (CPOL = CPHA = 0), (CPOL = CPHA = 1) CNVST SCLK DOUT Figure 13. SPI/MICROWIRE Serial-Interface Timing—Continuous Conversion (CPOL = ...

Page 14

Single-Supply, Low-Power, True-Differential, 10-Bit ADCs V L MAX1072 SCLK MAX1075 CNVST DOUT Figure 15. Interfacing to the TMS320C54_ Internal Clocks For continuous conversion, set the serial port to trans- mit a clock, and pulse the frame sync signal for ...

Page 15

Single-Supply, Low-Power, CNVST SCLK DOUT Figure 17. DSP Interface—Continuous Conversion CNVST SCLK DOUT Figure 18. DSP Interface—Single-Conversion, Continuous/Burst Clock ters should be configured for late framing (LAFR = ...

Page 16

Single-Supply, Low-Power, True-Differential, 10-Bit ADCs V L MAX1072 SCLK MAX1075 CNVST DOUT Figure 19. Interfacing to the ADSP21_ _ _ Signal-to-Noise Ratio For a waveform perfectly reconstructed from digital sam- ples, signal-to-noise ratio (SNR) is the ratio of full-scale ...

Page 17

Single-Supply, Low-Power, 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 two sine waves at two ...

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 © 2009 Maxim Integrated Products ...

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