Maxim MAX1270BCNG, MAX1270BCAI, MAX1270AENG, MAX1270AEAI, MAX1270ACNG Datasheet

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KIT

MANUAL

 

 

 

 

 

 

EVALUATION

 

SHEET

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DATA

Multirange, +5V, 8-Channel,

FOLLOWS

 

 

 

 

 

Serial 12-Bit ADCs

Description

multirange, 12-bit datarequire only a single +5V signals at their analog power-supply rail and provide eight analog software pro- ±10V, ±5V, 0 to ±VREF, ±VREF/2, 0 to

. This range switchrange to 14 bits and 4–20mA, ±12V, and to a single +5V system. are fault protected to channel will not affect channel. Other featrack/hold, software110ksps throughput reference opera-

interface directly condevices with-

Features

12-Bit Resolution, 1/2LSB Linearity

+5V Single-Supply Operation

SPI/QSPI and MICROWIRE-Compatible 3-Wire Interface

Four Software-Selectable Input Ranges MAX1270: 0 to +10V, 0 to +5V, ±10V, ±5V MAX1271: 0 to VREF, 0 to VREF/2, ±VREF,

±VREF/2

Eight Analog Input Channels

110ksps Sampling Rate

±16.5V Overvoltage-Tolerant Input Multiplexer

Internal 4.096V or External Reference

Two Power-Down Modes

Internal or External Clock

24-Pin Narrow DIP or 28-Pin SSOP Packages

) and two softwarestandby (STBYPD) are provided for low-cur-

. In standby mode, eliminating start-up

in 24-pin narrow packages.

Applications

Ordering Information

-PACKAGE

INL

(LSB)

 

 

 

Narrow Plastic DIP

±1/2

 

 

Narrow Plastic DIP

±1

 

 

SSOP

±1/2

MAX1270BCAI 0°C to +70°C 28 SSOP

±1

Ordering Information continued at end of data sheet.

Typical Operating Circuit

 

 

 

+5V

 

 

 

0.1 F

 

 

 

 

 

VDD

 

 

 

 

SHDN

 

 

CH0

 

 

 

 

CH1

 

 

 

ANALOG

CH2

MAX1270

 

CH3

 

INPUTS

CH4

MAX1271

 

 

CH5

 

 

 

 

CH6

 

 

 

 

CH7

 

 

MC68HCXX

 

 

 

CS

I/O

 

 

 

SCLK

SCK

 

REF

 

DIN

MOSI

 

 

DOUT

MISO

 

REFADJ

SSTRB

 

4.7 F

0.01 F

DGND

AGND

 

Pin Configurations appear at end of data sheet.

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

____________________________________________________________ Maxim Integrated Products 7-169

MAX1270/MAX1271

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.

MAX1270/MAX1271

Multirange, +5V, 8-Channel,

Serial 12-Bit ADCs

ABSOLUTE MAXIMUM RATINGS

VDD to AGND............................................................

-0.3V to +6V

Operating Temperature Ranges

 

AGND to DGND.....................................................

-0.3V to +0.3V

MAX127_C_ _ ......................................................

0°C to +70°C

CH0–CH7 to AGND .........................................................

 

±16.5V

MAX127_E_ _....................................................

-40°C to +85°C

REF, REFADJ to AGND ..............................

-0.3V to (VDD + 0.3V)

Storage Temperature Range ............................

-65°C to +150°C

SSTRB, DOUT to DGND.............................

-0.3V to (VDD + 0.3V)

Lead Temperature (soldering, 10sec) ............................

+300°C

SHDN, CS, DIN, SCLK to DGND..............................

-0.3V to +6V

 

 

Max Current into Any Pin ....................................................

 

50mA

 

 

Continuous Power Dissipation (TA = +70°C)

 

 

 

24-Pin Narrow DIP (derate 13.33mW/°C above +70°C)

..1067mW

 

 

28-Pin SSOP (derate 9.52mW/°C above +70°C) ..........

762mW

 

 

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.

ELECTRICAL CHARACTERISTICS

(VDD = +5.0V ±5%; unipolar/bipolar range; external reference mode, VREF = +4.096V; 4.7µF at REF; external clock, fCLK = 2.0MHz (50% duty cycle), 18 clock/conversion cycle, 110ksps; TA = TMIN to TMAX; unless otherwise noted. Typical values are TA = +25°C.)

PARAMETERS

SYMBOL

CONDITIONS

 

MIN

TYP

MAX

 

UNITS

 

 

 

 

 

 

 

 

 

 

 

 

 

ACCURACY ((Note 1))

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Resolution

 

 

 

 

12

 

 

 

 

bits

 

 

 

 

 

 

 

 

 

 

 

 

 

Integral Nonlinearity

INL

MAX127_A

 

 

 

±0.5

 

 

LSB

 

 

 

 

 

 

 

 

 

MAX127_B

 

 

 

±1.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Differential Nonlinearity

DNL

No missing codes over temperature

 

 

 

±1

 

 

LSB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unipolar

MAX127_A

 

 

 

±3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Offset Error

 

MAX127_B

 

 

 

±5

 

 

LSB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bipolar

MAX127_A

 

 

 

±5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX127_B

 

 

 

±10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Channel-to-Channel Offset

 

Unipolar

 

 

 

±0.1

 

 

 

LSB

Error Matching

 

Bipolar

 

 

 

±0.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unipolar

MAX127_A

 

 

 

±7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gain Error

 

MAX127_B

 

 

 

±10

 

 

LSB

 

 

 

 

 

 

 

 

 

 

 

 

 

(Note 2)

 

Bipolar

MAX127_A

 

 

 

±7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX127_B

 

 

 

±10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gain Error Temperature

 

Unipolar, external reference

 

 

±3

 

 

 

ppm/°C

Coefficient (Note 2)

 

Bipolar, external reference

 

 

±5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DYNAMIC SPECIFICATIONS (10kHz sine-wave input, ±10Vp-p (MAX1270), or ±4.096Vp-p

(MAX1271), fSAMPLE = 110ksps)

Signal-to-Noise + Distortion

 

SINAD

 

 

 

70

 

 

 

 

dB

Ratio

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total Harmonic Distortion

 

THD

Up to the 5th harmonic

 

 

-87

-78

 

 

dB

 

 

 

 

 

 

 

 

 

 

 

 

 

Spurious-Free Dynamic Range

 

SFDR

 

 

 

80

 

 

 

 

dB

 

 

 

 

 

 

 

 

 

 

 

 

Channel-to-Channel Crosstalk

 

 

50kHz (Note 3)

 

 

-86

 

 

 

dB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DC, VIN = ±16.5V

 

 

-96

 

 

 

dB

Aperture Delay

 

 

External clock mode

 

 

15

 

 

 

ns

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Aperture Jitter

 

 

External clock mode

 

 

<50

 

 

 

ps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Internal clock mode

 

 

10

 

 

 

ns

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7-170 ___________________________________________________________________________________

Multirange, +5V, 8-Channel,

Serial 12-Bit ADCs

ELECTRICAL CHARACTERISTICS (continued)

(VDD = +5.0V ±5%; unipolar/bipolar range; external reference mode, VREF = +4.096V; 4.7µF at REF; external clock, fCLK = 2.0MHz (50% duty cycle), 18 clock/conversion cycle, 110ksps; TA = TMIN to TMAX; unless otherwise noted. Typical values are TA = +25°C.)

PARAMETERS

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

 

 

 

 

 

 

 

ANALOG INPUT

Track/Hold Acquisition Time

tACQ

fCLK = 2.0MHz

 

 

3

µs

 

 

 

±10V or ±VREF range

 

5

 

 

Small-Signal Bandwidth

 

-3dB

±5V or ±VREF/2 range

 

2.5

 

MHz

 

rolloff

0 to 10V or 0 to VREF range

 

2.5

 

 

 

 

 

 

 

 

 

0 to 5V or 0 to VREF/2 range

 

1.25

 

 

 

 

 

RNG = 1

0

 

10

 

 

 

Unipolar

MAX1270

 

 

 

 

 

 

RNG = 0

0

 

5

 

 

 

(BIP = 0),

 

 

 

 

RNG = 1

0

 

VREF

 

 

 

Table 3

 

 

 

 

 

MAX1271

0

 

VREF/2

 

Input Voltage Range

VIN

 

RNG = 0

 

V

 

RNG = 1

-10

 

10

 

 

 

 

 

 

 

Bipolar

MAX1270

 

 

 

 

 

 

RNG = 0

-5

 

5

 

 

 

(BIP = 1),

 

 

 

 

RNG = 1

-VREF

 

VREF

 

 

 

Table 3

 

 

 

 

 

MAX1271

-VREF/2

 

VREF/2

 

 

 

 

RNG = 0

 

 

 

 

 

0 to 10V range

-10

 

720

 

 

 

Unipolar

MAX1270

-10

 

360

 

 

 

0 to 5V range

 

 

 

 

 

MAX1271

-10

0.1

10

 

Input Current

IIN

 

±10V range

-1200

 

720

µA

 

 

 

MAX1270

-600

 

360

 

 

 

Bipolar

±5V range

 

 

 

 

±VREF range

-1200

 

10

 

 

 

 

 

 

 

 

 

MAX1271

 

 

 

 

 

 

 

±VREF/2 range

-600

 

10

 

Dynamic Resistance

∆VIN/∆IIN

Unipolar

 

 

21

 

kΩ

Bipolar

 

 

16

 

 

 

 

 

 

 

Input Capacitance

 

(Note 4)

 

 

 

40

pF

INTERNALREFERENCE

 

 

 

 

 

 

 

REF Output Voltage

VREF

TA = +25°C

 

4.076

4.096

4.116

V

REF Output Tempco

TC VREF

MAX1270_C/MAX1271_C

 

±15

 

ppm/°C

MAX1270_E/MAX1271_E

 

±30

 

 

 

 

 

 

 

Output Short Circuit Current

 

 

 

 

 

 

30

 

mA

 

 

Load Regulation (Note 5)

 

0 to 0.5mA output current

 

 

10

 

mV

 

 

 

 

 

 

 

 

 

 

 

 

 

Capacitive Bypass at REF

 

 

 

 

 

4.7

 

 

µF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Capacitive Bypass at REFADJ

 

 

 

 

 

0.01

 

 

µF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REFADJ Output Voltage

 

 

 

 

 

2.465 2.500

2.535

 

V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REFADJ Adjustment Range

 

 

Figure 1

 

±1.5

 

 

%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Buffer Voltage Gain

 

 

 

1.638

 

 

V/V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REFERENCEINPUT(Reference

 

buffer disabled, reference input applied to REF)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input Voltage Range

 

 

 

 

 

2.40

4.18

 

V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input Current

 

 

VREF = 4.18V

Normal or STBYPD

 

 

400

 

µA

 

 

 

 

 

 

 

 

 

 

FULLPD

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX1270/MAX1271

____________________________________________________________________________________ 7-171

MAX1270/MAX1271

Multirange, +5V, 8-Channel,

Serial 12-Bit ADCs

ELECTRICAL CHARACTERISTICS (continued)

(VDD = +5.0V ±5%; unipolar/bipolar range; external reference mode, VREF = +4.096V; 4.7µF at REF; external clock, fCLK = 2.0MHz (50% duty cycle), 18 clock/conversion cycle, 110ksps; TA = TMIN to TMAX; unless otherwise noted. Typical values are TA = +25°C.)

PARAMETERS

SYMBOL

CONDITIONS

 

MIN

TYP

MAX

UNITS

 

 

 

 

 

 

 

 

 

Input Resistance

 

VREF = 4.18V

Normal or STBYPD

 

10

 

 

kΩ

 

 

 

 

 

 

 

 

FULLPD

 

4.18

 

 

MΩ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REFADJ Threshold for Buffer

 

 

 

 

VDD - 0.5

 

 

V

Disable

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER REQUIREMENT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Supply Voltage

VDD

 

 

4.75

 

5.25

V

 

 

 

 

 

 

 

 

 

 

 

Normal

Bipolar range

 

 

 

18

mA

 

 

 

 

 

 

 

Supply Current

IDD

Unipolar range

 

 

6

10

 

 

 

 

 

 

 

 

 

 

 

STBYPD power down mode (Note 6)

 

 

700

850

µA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FULLPD power down mode

 

 

120

220

 

 

 

 

 

 

 

 

 

 

Power-Supply Rejection

PSRR

External reference = 4.096V

 

 

±0.1

±0.5

LSB

Ratio (Note 7)

 

Internal reference

 

 

 

±0.5

 

 

 

 

 

 

 

 

 

 

 

TIMING

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

External Clock Frequency

fCLK

 

 

 

0.1

 

2.0

MHz

Range

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Acquisition Phase

 

External clock mode (Note 8)

 

3

 

 

µs

 

 

 

 

 

 

 

 

Internal clock mode, Figure 9

 

3

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Conversion Time

tCONV

External clock mode (Note 8)

 

6

 

 

µs

 

 

 

 

 

 

Internal clock mode, Figure 9

 

6

7.7

11

 

 

 

 

 

 

 

 

 

 

 

 

 

Throughput Rate

 

External clock mode

 

 

 

 

110

ksps

 

 

 

 

 

 

 

 

 

 

 

 

 

Internal clock mode

 

 

 

 

43

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bandgap Reference Start-Up

 

Power-up

 

 

 

200

 

µs

Time (Note 9)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

To 0.1mV, REF

CREF = 4.7µF

 

 

8

 

 

Reference Buffer Settling Time

 

bypass capacitor

 

 

 

 

 

ms

 

CREF = 33µF

 

 

60

 

 

 

fully discharged

 

 

 

 

 

 

 

 

 

 

 

 

 

DIGITAL INPUTS:DIN,SCLK, CS, SHDN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input High Threshold Voltage

VIH

 

 

 

 

 

2.4

V

 

 

 

 

 

 

 

 

 

Input Low Threshold Voltage

VIL

 

 

 

0.8

 

 

V

 

 

 

 

 

 

 

 

 

Input Hysteresis

VHYS

 

 

 

 

0.2

 

V

 

 

 

 

 

 

 

 

 

Input Leakage Current

IIN

VIN = 0 to VDD

 

 

-10

 

10

µA

Input Capacitance

CIN

(Note 4)

 

 

 

 

15

pF

 

 

 

 

 

 

 

 

 

DIGITAL OUTPUTS:DOUT, SSTRB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output Voltage Low

VOL

ISINK = 5mA

 

 

 

 

0.4

V

ISINK = 16mA

 

 

 

0.4

 

 

 

 

 

 

 

 

Output Voltage High

VOH

ISOURCE = 0.5mA

 

 

VDD - 0.5

 

 

V

Three-State Leakage Current

IL

CS = VDD

 

-10

 

10

µA

Three-State Output Capacitance

COUT

CS = VDD (Note 4)

 

 

 

 

15

pF

 

 

 

 

7-172 ___________________________________________________________________________________

Multirange, +5V, 8-Channel,

Serial 12-Bit ADCs

TIMING CHARACTERISTICS

(VDD = +4.75V to +5.25; unipolar/bipolar range; external reference mode, VREF = +4.096V; 4.7µF at REF; external clock, fCLK = 2MHz; TA = TMIN to TMAX, unless otherwise noted. Typical values are TA = +25°C.) (Figures 2, 5, 7, 10)

PARAMETERS

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

 

 

 

 

 

 

 

DIN to SCLK Setup

tDS

 

100

 

 

ns

 

 

 

 

 

 

 

DIN to SCLK Hold

tDH

 

 

 

0

ns

 

 

 

 

 

 

 

SCLK Fall to Output Data Valid

tDO

CLOAD = 100pF

20

 

170

ns

CS Fall to Output Enable

tDV

CLOAD = 100pF

 

 

120

ns

CS Rise to Output Disable

tTR

CLOAD = 100pF

 

 

100

ns

CS to SCLK Rise Setup

tCSS

 

100

 

 

ns

 

 

 

 

 

 

 

CS to SCLK Rise Hold

tCSH

 

0

 

 

ns

 

 

 

 

 

 

 

SCLK Pulse Width High

tCH

 

200

 

 

ns

 

 

 

 

 

 

 

SCLK Pulse Width Low

tCL

 

200

 

 

ns

 

 

 

 

 

 

 

SCLK Fall to SSTRB

tSSTRB

CLOAD = 100pF

 

 

200

ns

CS to SSTRB Output Enable

tSDV

CLOAD = 100pF

 

 

200

ns

External clock mode only

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CS to SSTRB Output Disable

tSTR

CLOAD = 100pF

 

 

200

ns

External clock mode only

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SSTRB Rise to SCLK Rise

tSCK

Internal clock mode only

0

 

 

ns

(Note 4)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note 1: Accuracy specifications tested at VDD = +5.0V. Performance at power-supply tolerance limit is guaranteed by Power-Supply Rejection test.

Note 2: External reference: VREF = 4.096V, offset error nulled. Ideal last-code transition = FS - 3/2LSB.

Note 3: Ground “on” channel; sine wave applied to all “off” channels. VIN = ±5V (MAX1270), VIN = ±4V (MAX1271). Note 4: Guaranteed by design, not production tested.

Note 5: Use static external loads during conversion for specified accuracy. Note 6: Tested using internal reference.

Note 7: PSRR measured at full scale. Tested for the ±10V (MAX1270) and ±4.096V (MAX1271) input ranges.

Note 8: Acquisition phase and conversion time are dependent on the clock period; clock has 50% duty cycle (Figure 6). Note 9: Not production tested. Provided for design guidance only.

MAX1270/MAX1271

____________________________________________________________________________________ 7-173

Maxim MAX1270BCNG, MAX1270BCAI, MAX1270AENG, MAX1270AEAI, MAX1270ACNG Datasheet

MAX1270/MAX1271

Multirange, +5V, 8-Channel,

Serial 12-Bit ADCs

Typical Operating Characteristics

(Typical Operating Circuit, VDD = +5V; external reference mode, VREF = +4.096V; 4.7µF at REF; external clock, fCLK = 2MHz; 110ksps; TA = +25°C; unless otherwise noted.)

SUPPLY CURRENT (mA)

25

20

15

10

5

0

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX1270/1 toc01

(mA)

 

SUPPLY CURRENT

0

1

2

3

4

5

6

7

SUPPLY VOLTAGE (V)

SUPPLY CURRENT vs. TEMPERATURE

6.5

 

 

 

 

 

 

 

 

 

 

MAX1270/1 toc02

( A)

 

 

 

 

 

 

 

 

 

 

6.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5.9

 

 

 

 

 

 

 

 

 

 

 

SUPPLYCURRENT

6.1

 

 

 

 

 

 

 

 

 

 

 

STANDBY

5.7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-40

-15

10

35

60

85

 

TEMPERATURE (°C)

750

650

550

450

350

250

150

50

-40

STANDBY SUPPLY CURRENT vs. TEMPERATURE

INTERNAL

MAX1270/1 toc03

REFERENCE

 

EXTERNAL

REFERENCE

-15

10

35

60

85

TEMPERATURE (°C)

FULL POWER-DOWN SUPPLY CURRENT

 

 

NORMALIZED REFERENCE VOLTAGE

 

 

CHANNEL-TO-CHANNEL OFFSET-ERROR

 

 

vs. TEMPERATURE

 

 

 

 

vs. TEMPERATURE

 

 

MATCHINGERROR-OFFSETCHANNEL-TO-CHANNEL(LSB)

 

MATCHING vs. TEMPERATURE

 

150

 

 

 

 

toc04MAX1270/1

VOLTAGEREFERENCENORMALIZED

1.001

 

 

 

 

MAX1270/1toc05

0.35

 

 

BIPOLAR MODE

MAX1270/1toc06

A)(CURRENTSUPPLYDOWN-POWERFULL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

130

 

 

 

EXTERNAL

 

 

1.000

 

 

 

 

 

 

0.30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REFERENCE

 

 

 

 

 

 

 

 

 

0.25

 

 

 

 

 

110

 

 

 

 

 

 

0.999

 

 

 

 

 

 

0.20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

90

 

 

 

 

 

 

0.998

 

 

 

 

 

 

0.15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INTERNAL

 

 

 

 

 

 

 

 

 

0.10

 

 

UNIPOLAR MODE

 

70

 

 

REFERENCE

 

 

0.997

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.05

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

50

 

 

 

 

 

 

0.996

 

 

 

 

 

 

0

 

 

 

 

 

-40

-15

10

35

60

85

 

-40

-15

10

35

60

85

 

-40

-15

10

35

60

85

 

 

TEMPERATURE (°C)

 

 

 

 

TEMPERATURE (°C)

 

 

 

 

 

TEMPERATURE (°C)

 

 

 

 

 

CHANNEL-TO-CHANNEL GAIN-ERROR

 

 

 

 

 

INTEGRAL NONLINEARITY vs.

 

 

 

 

 

 

 

 

 

 

 

MATCHING(LSB)

 

 

MATCHING vs. TEMPERATURE

 

 

 

 

 

 

 

DIGITAL CODE

 

 

 

 

 

 

 

 

FTT PLOT

 

 

 

0.8

 

 

 

 

 

 

 

 

 

 

 

MAX1270/1toc07

 

0.15

 

 

 

 

 

 

 

 

 

 

MAX1270/1toc08

 

0

 

 

 

 

 

 

MAX1270/1toc09

 

 

 

 

 

 

 

 

 

 

 

 

(LSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

fIN = 10kHz

 

 

0.7

 

 

 

 

 

 

 

 

 

 

 

 

 

0.10

 

 

 

 

 

 

 

 

 

 

 

 

-20

 

 

 

fSAMPLE = 110ksps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ERROR-GAINCHANNEL-TO

 

 

 

UNIPOLAR MODE

 

 

 

 

 

NONLINEARITYINTEGRAL

0.05

 

 

 

 

 

 

 

 

 

 

 

(dB)AMPLITUDE

-40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

-60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-0.05

 

 

 

 

 

 

 

 

 

 

 

 

-80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIPOLAR MODE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-

0.2

 

 

 

 

 

 

 

 

 

 

 

 

 

-0.10

 

 

 

 

 

 

 

 

 

 

 

 

-100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CHANNEL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.1

 

 

 

 

 

 

 

 

 

 

 

 

 

-0.15

 

 

 

 

 

 

 

 

 

 

 

 

-120

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-40

-15

10

35

60

85

 

0

819

1638

2457

3276

4095

 

0

10k

20k

30k

40k

50k

 

 

 

 

 

 

TEMPERATURE (°C)

 

 

 

 

 

 

 

 

 

DIGITAL CODE

 

 

 

 

 

 

 

 

FREQUENCY (Hz)

 

 

 

7-174 ___________________________________________________________________________________

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