MAXIM MAX1072, MAX1075 Technical data

General Description

The MAX1072/MAX1075 low-power, high-speed, serial­output, 10-bit, analog-to-digital converters (ADCs) oper­ate at up to 1.8Msps. These devices feature true-differen­tial inputs, offering better noise immunity, distortion
improvements, and a wider dynamic range over single­ended 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 fea­ture a partial power-down mode and a full power-down
mode for use between conversions, which lower the sup­ply current to 1mA (typ) and 1µA (max), respectively. Also
featured is a separate power-supply input (VL), which
allows direct interfacing to +1.8V to VDDdigital logic. The
fast conversion speed, low-power dissipation, excellent
AC performance, and DC accuracy (±0.5 LSB INL) make
the MAX1072/MAX1075 ideal for industrial process con­trol, motor control, and base-station applications.

The MAX1072/MAX1075 come in a 12-pin TQFN pack­age, and are available in the commercial (0°C to +70°C)
and extended (-40°C to +85°C) temperature ranges.

Applications

Data Acquisition
Bill Validation
Motor Control
Communications
Portable Instruments

Features

♦ 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

MAX1072/MAX1075

1.8Msps, Single-Supply, Low-Power,
True-Differential, 10-Bit ADCs

________________________________________________________________ Maxim Integrated Products 1

12

AIN+11N.C.10SCLK

45

N.C.6GND

1

2REF

3

9

8

7RGND

CNVST

DOUT

V

L

MAX1072
MAX1075

AIN-

V

DD

TQFN

TOP VIEW

Pin Configuration

Ordering Information

MAX1072
MAX1075

DOUT

AIN+

REF

4.7µF

10µF10µF

+4.75V TO +5.25V

0.01µF

0.01µF

0.01µF

+1.8V TO V

DD

AIN-

REF

V

DD

DIFFERENTIAL

INPUT

VOLTAGE

RGND

V

L

GND

CNVST

SCLK

µC/DSP

+

-

Typical Operating Circuit

19-3153; Rev 0; 1/04

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.

SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.

查询MAX1072供应商

PART TEMP RANGE

MAX1072CTC-T 0°C to +70°C 12 TQFN-12 Unipolar

MAX1072ETC-T -40°C to +85°C 12 TQFN-12 Unipolar
MAX1075CTC-T 0°C to +70°C 12 TQFN-12 Bipolar
MAX1075ETC-T -40°C to +85°C 12 TQFN-12 Bipolar

PIN­PACKAGE

INPUT

MAX1072/MAX1075

1.8Msps, Single-Supply, Low-Power,
True-Differential, 10-Bit ADCs

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= +5V ±5%, VL= VDD, V

REF

= 4.096V, f

SCLK

= 28.8MHz, 50% duty cycle, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical

values are at T

A

= +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

VDDto GND..............................................................-0.3V to +6V

V

L

to GND ...................-0.3V to the lower of (VDD+ 0.3V) or +6V

Digital Inputs

to GND ....................-0.3V to the lower of (V

DD

+ 0.3V) or +6V

Digital Output

to GND.......................-0.3V to the lower of (V

L

+ 0.3V) or +6V

Analog Inputs and

REF to GND.............-0.3V to the lower of (V

DD

+ 0.3V) or +6V

RGND to GND .......................................................-0.3V to +0.3V

Maximum Current into Any Pin............................................50mA

Continuous Power Dissipation (T

A

= +70°C)

12-Pin TQFN (derate 16.9mW/°C above +70°C) ......1349mW

Operating Temperature Ranges

MAX107_ CTC ...................................................0°C to +70°C

MAX107_ ETC.................................................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-60°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER

CONDITIONS

UNITS

DC ACCURACY

Resolution 10 Bits
Relative Accuracy INL (Note 1)

LSB

Differential Nonlinearity DNL (Note 2)

LSB

Offset Error ±2 LSB
Offset-Error Temperature

Coefficient

±1

ppm/°C

Gain Error Offset nulled ±2 LSB
Gain Temperature Coefficient ±2

ppm/°C

DYNAMIC SPECIFICATIONS (f

IN

= 525kHz

sine wave

, VIN = V

REF

, unless otherwise noted.)

Signal-to-Noise Plus Distortion

SINAD 60 61 dB

Total Harmonic Distortion

THD -80 -74 dB
Spurious-Free Dynamic Range SFDR -80 -74 dB
Intermodulation Distortion IMD f

IN1

= 250kHz, f

IN2

= 300kHz -78 dB

Full-Power Bandwidth -3dB point, small-signal method 20

MHz

Full-Linear Bandwidth S/(N + D) Σ 56dB, single ended 2

MHz

CONVERSION RATE

Minimum Conversion Time t

CONV

(Note 3)

µs

Maximum Throughput Rate 1.8

Msps

M i ni m um Thr oug hp ut Rate ( N ote 4) 10

ksps

Track-and-Hold Acquisition Time

t

ACQ

(Note 5) 104 ns
Aperture Delay 5ns
Aperture Jitter (Note 6) 30 ps
External Clock Frequency f

SCLK

MHz

SYMBOL

MIN TYP MAX

±0.5
±0.5

0.556

28.8

MAX1072/MAX1075

1.8Msps, Single-Supply, Low-Power,
True-Differential, 10-Bit ADCs

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +5V ±5%, VL= VDD, V

REF

= 4.096V, f

SCLK

= 28.8MHz, 50% duty cycle, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical

values are at T

A

= +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

ANALOG INPUTS (AIN+, AIN-)

AIN+ - AIN-, MAX1072 0

Differential Input Voltage Range

V

IN

AIN+ - AIN-, MAX1075

V

Absolute Input Voltage Range 0

V
DC Leakage Current ±1 µA
Input Capacitance Per input pin 20 pF
Input Current (Average)

75 µA

REFERENCE INPUT (REF)

REF Input Voltage Range V

REF

1.0

V

DD

+

V

Input Capacitance 20 pF
DC Leakage Current ±1 µA
Input Current (Average)

400 µA

DIGITAL INPUTS (SCLK, CNVST)

Input Voltage Low VIL

V
Input Voltage High VIH 0.7 x V

L

V
Input Leakage Current I

IL

µA

DIGITAL OUTPUT (DOUT)

Output Load Capacitance C

OUT

For stated timing performance 30 pF

Output Voltage Low V

OL

I

SINK

= 5mA, VL ≥ 1.8V 0.4 V

Output Voltage High V

OH

I

SOURCE

= 1mA, VL ≥ 1.8V

V
Output Leakage Current I

OL

Output high impedance

µA

POWER REQUIREMENTS

Analog Supply Voltage V

DD

V
Digital Supply Voltage V

L

1.8

V

Static, f

SCLK

= 28.8MHz

79

Static, no SCLK 4 5

Analog Supply Current,
Normal Mode

I

DD

Operational, 1.8Msps 9 11

mA

f

SCLK

= 28.8MHz 1

Analog Supply Current,
Partial Power-Down Mode

I

DD

No SCLK 1

mA

f

SCLK

= 28.8MHz 1

Analog Supply Current,
Full Power-Down Mode

I

DD

No SCLK 1

µA

Operational, full-scale input at 1.8Msps

1 2.5

Static, f

SCLK

= 28.8MHz

Partial/full power-down mode,
f

SCLK

= 28.8MHz

0.2 0.5

mA

Digital Supply Current (Note 7)

Static, no SCLK (all modes)

1

Positive-Supply Rejection PSR VDD = 5V ±5%, full-scale input

mV

Time averaged at maximum throughput rate

-V

/ 2 +V

REF

Time averaged at maximum throughput rate

V L - 0.5V

0.05 ±10

±0.2 ±10

4.75 5.25

0.4 1

0.1

±0.2 ±3.0

V

REF

REF

V

50mV

0.3 x V

V

/ 2

DD

L

DD

µA

MAX1072/MAX1075

1.8Msps, Single-Supply, Low-Power,
True-Differential, 10-Bit ADCs

4 _______________________________________________________________________________________

Note 1: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the gain error and the offset

error have been nulled.

Note 2: No missing codes over temperature.
Note 3: Conversion time is defined as the number of clock cycles (16) multiplied by the clock period.
Note 4: At sample rates below 10ksps, the input full-linear bandwidth is reduced to 5kHz.
Note 5: The listed value of three SCLK cycles is given for full-speed continuous conversions. Acquisition time begins on the 14th ris-

ing edge of SCLK and terminates on the next falling edge of CNST. The IC idles in acquisition mode between conversions.

Note 6: Undersampling at the maximum signal bandwidth requires the minimum jitter spec for SINAD performance.
Note 7: Digital supply current is measured with the V

IH

level equal to VL, and the VILlevel equal to GND.

TIMING CHARACTERISTICS

(VDD= +5V ±5%, VL= VDD, V

REF

= 4.096V, f

SCLK

= 28.8MHz, 50% duty cycle, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical

values are at T

A

= +25°C.)

PARAMETER

CONDITIONS

UNITS

SCLK Pulse-Width High t

CH

VL = 1.8V to V

DD

ns

SCLK Pulse-Width Low t

CL

VL = 1.8V to V

DD

ns

CL = 30pF, VL = 4.75V to V

DD

14

CL = 30pF, VL = 2.7V to V

DD

17

SCLK Rise to DOUT Transition t

DOUT

CL = 30pF, VL = 1.8V to V

DD

24

ns

DOUT Remains Valid After SCLK

VL = 1.8V to V

DD

4ns

CNVST Fall to SCLK Fall t

SETUPVL

= 1.8V to V

DD

10 ns

CNVST Pulse Width t

CSW

VL = 1.8V to V

DD

20 ns

Power-Up Time; Full Power-Down

2ms

Restart Time; Partial Power-Down

t

RCV

16

Cycles

Figure 1. Detailed Serial-Interface Timing

GND

6kΩ

C

L

DOUT

DOUT

C

L

GND

V

L

a) HIGH-Z TO VOH, V

OL

TO VOH,

AND V

OH

TO HIGH-Z

b) HIGH-Z TO V

OL

, V

OH

TO VOL,

AND V

OL

TO HIGH-Z

6kΩ

Figure 2. Load Circuits for Enable/Disable Times

SYMBOL

t

DHOLD

T

PWR-UP

MIN TYP MAX

15.6

15.6

CNVST

t

SETUP

SCLK

DOUT

t

CL

t

CH

t

DHOLD

t

DOUT

t

CSW

MAX1072/MAX1075

1.8Msps, Single-Supply, Low-Power,
True-Differential, 10-Bit ADCs

_______________________________________________________________________________________ 5

Typical Operating Characteristics

(VDD= +5V, VL= VDD, V

REF

= 4.096V, f

SCLK

= 28.8MHz, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

INTEGRAL NONLINEARITY

vs. DIGITAL OUTPUT CODE (MAX1072)

MAX1072/75 toc01

DIGITAL OUTPUT CODE

INL (LSB)

1000800600400200

-0.1

0

0.1

0.2

-0.2
0 1200

INTEGRAL NONLINEARITY

vs. DIGITAL OUTPUT CODE (MAX1075)

MAX1072/75 toc02

DIGITAL OUTPUT CODE

INL (LSB)

1000800600400200

-0.1

0

0.1

0.2

-0.2
0 1200

DIFFERENTIAL NONLINEARITY

vs. DIGITAL OUTPUT CODE (MAX1072)

MAX1072/75 toc03

DIGITAL OUTPUT CODE

DNL (LSB)

1000800600400200

-0.1

0

0.1

0.2

-0.2
0 1200

DIFFERENTIAL NONLINEARITY

vs. DIGITAL OUTPUT CODE (MAX1075)

MAX1072/75 toc04

DIGITAL OUTPUT CODE

DNL (LSB)

1000800600400200

-0.1

0

0.1

0.2

-0.2
0 1200

OFFSET ERROR

vs. TEMPERATURE (MAX1072)

MAX1072/75 toc05

TEMPERATURE (°C)

OFFSET ERROR (LSB)

603510-15

-0.25

0

0.25

0.50

-0.50

-40 85

OFFSET ERROR

vs. TEMPERATURE (MAX1075)

MAX1072/75 toc06

TEMPERATURE (°C)

OFFSET ERROR (LSB)

603510-15

-0.25

0

0.25

0.50

-0.50

-40 85

GAIN ERROR

vs. TEMPERATURE (MAX1072)

MAX1072/75 toc07

TEMPERATURE (°C)

GAIN ERROR (LSB)

6035-15 10

-0.75

-0.50

-0.25

0

0.25

0.50

0.75

1.00

-1.00

-40 85

GAIN ERROR

vs. TEMPERATURE (MAX1075)

MAX1072/75 toc08

TEMPERATURE (°C)

GAIN ERROR (LSB)

6035-15 10

-0.75

-0.50

-0.25

0

0.25

0.50

0.75

1.00

-1.00

-40 85

FFT PLOT (MAX1072)

MAX1072/75 toc09

ANALOG INPUT FREQUENCY (kHz)

AMPLITUDE (dB)

800600400200

-120

-100

-80

-60

-40

-20

0

-140
0 1000

f

SAMPLE

= 2Msps

f

SCLK

= 32MHz

f

IN

= 100kHz
SINAD = 61.4dB
SNR = 61.4dB
THD = -94.42dB
SFDR = 84.54dB

Typical Operating Characteristics (continued)

(VDD= +5V, VL= VDD, V

REF

= 4.096V, f

SCLK

= 28.8MHz, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

MAX1072/MAX1075

1.8Msps, Single-Supply, Low-Power,
True-Differential, 10-Bit ADCs

6 _______________________________________________________________________________________

FFT PLOT (MAX1075)

MAX1072/75 toc10

ANALOG INPUT FREQUENCY (kHz)

AMPLITUDE (dB)

800600400200

-120

-100

-80

-60

-40

-20

0

-140
0 1000

f

SAMPLE

= 2Msps

f

SCLK

= 32MHz

f

IN

= 100kHz
SINAD = 61.37dB
SNR = 61.37dB
THD = -90.79dB
SFDR = 85.45dB

FFT PLOT (MAX1072)

MAX1072/75 toc11

ANALOG INPUT FREQUENCY (kHz)

AMPLITUDE (dB)

800600400200

-120

-100

-80

-60

-40

-20

0

-140
0 1000

f

SAMPLE

= 2Msps

f

SCLK

= 32MHz

f

IN

= 300kHz
SINAD = 61.43dB
SNR = 61.43dB
THD = -84.38dB
SFDR = 85.43dB

FFT PLOT (MAX1075)

MAX1072/75 toc12

ANALOG INPUT FREQUENCY (kHz)

AMPLITUDE (dB)

800600400200

-120

-100

-80

-60

-40

-20

0

-140
0 1000

f

SAMPLE

= 2Msps

f

SCLK

= 32MHz

f

IN

= 300kHz
SINAD = 61.36dB
SNR = 61.38dB
THD = -84.27dB
SFDR = 84.82dB

FFT PLOT (MAX1072)

MAX1072/75 toc13

ANALOG INPUT FREQUENCY (kHz)

AMPLITUDE (dB)

800600400200

-120

-100

-80

-60

-40

-20

0

-140
0 1000

f

SAMPLE

= 2Msps

f

SCLK

= 32MHz

f

IN

= 500kHz
SINAD = 61.27dB
SNR = 61.28dB
THD = -86.84dB
SFDR = 84.77dB

FFT PLOT (MAX1075)

MAX1072/75 toc14

ANALOG INPUT FREQUENCY (kHz)

AMPLITUDE (dB)

800600400200

-120

-100

-80

-60

-40

-20

0

-140
0 1000

f

SAMPLE

= 2Msps

f

SCLK

= 32MHz

f

IN

= 500kHz
SINAD = 61.34dB
SNR = 61.35dB
THD = -95.5dB
SFDR = 84.35dB

TOTAL HARMONIC DISTORTION

vs. SOURCE IMPEDANCE

MAX1072/75 toc15

SOURCE IMPEDANCE (Ω)

THD (dB)

100

-95

-90

-85

-80

-75

-70

-65

-60

-100
10 1000

fIN = 100kHz

fIN = 500kHz

TWO-TONE IMD PLOT (MAX1072)

MAX1072/75 toc16

ANALOG INPUT FREQUENCY (kHz)

AMPLITUDE (dB)

800600400200

-120

-100

-80

-60

-40

-20

0

-140
0 1000

f

SCLK

= 32MHz

f

IN1

= 250.039kHz

f

IN2

= 300.059kHz

IMD = -81.9dB

f

IN1

f

IN2

TWO-TONE IMD PLOT (MAX1075)

MAX1072/75 toc17

ANALOG INPUT FREQUENCY (kHz)

AMPLITUDE (dB)

800600400200

-120

-100

-80

-60

-40

-20

0

-140
0 1000

f

SCLK

= 32MHz

f

IN1

= 250.039kHz

f

IN2

= 300.059kHz

IMD = -82.1dB

f

IN1

f

IN2

VDD/VL FULL POWER-DOWN

SUPPLY CURRENT vs. TEMPERATURE

MAX1072/75 toc18

TEMPERATURE (°C)

V

DD

/V

L

SUPPLY CURRENT (µA)

603510-15

0.2

0.4

0.6

0.8

1.0

0

-40 85

VDD, f

SCLK

= 28.8MHz

VDD, f

SCLK

= 0

VL, f

SCLK

= 0