Rainbow Electronics MAX1326 User Manual

General Description

The MAX1316–MAX1318/MAX1320–MAX1322/MAX1324– MAX1326 14-bit, analog-to-digital converters (ADCs) offer two, four, or eight independent input channels. Independent track/hold (T/H) circuitry provides simultaneous sampling for each channel. The MAX1316/ MAX1317/MAX1318 have a 0 to +5V input range with ±6.0V fault-tolerant inputs. The MAX1320/MAX1321/ MAX1322 have a ±5V input range with ±16.5V fault-tolerant inputs. The MAX1324/MAX1325/MAX1326 have a ±10V input range with ±16.5V fault-tolerant inputs. These ADCs convert two channels in 2µs, and up to eight channels in 3.8µs, and have an 8-channel throughput of 250ksps per channel. Other features include a 10MHz T/H input bandwidth, internal clock, internal (+2.5V) or external (+2.0V to +3.0V) reference, and powersaving modes.

A 16.6MHz, 14-bit, bidirectional, parallel interface provides the conversion results and accepts digital configuration inputs.

These devices operate from a +4.75V to +5.25V analog supply and a separate +2.7V to +5.25V digital supply, and consume less than 50mA total supply current.

These devices come in a 48-pin TQFP package and operate over the extended -40°C to +85°C temperature range.

Applications

Multiphase Motor Control Power-Grid Synchronization Power-Factor Monitoring and Correction Vibration and Waveform Analysis

Features

♦ 8-/4-/2-Channel, 14-Bit ADCs

±1.5 LSB INL, ±1 LSB DNL, No Missing Codes 90dBc SFDR, -86dBc THD, 76.5dB SINAD, 77dB SNR at 100kHz Input

♦ On-Chip T/H Circuit for Each Channel

10ns Aperture Delay 50ps Channel-to-Channel T/H Matching

♦ Fast Conversion Time

One Channel in 1.6µs Two Channels in 1.9µs Four Channels in 2.5µs Eight Channels in 3.7µs

♦ High Throughput

526ksps/ch for One Channel 455ksps/ch for Two Channels 357ksps/ch for Four Channels 250ksps/ch for Eight Channels

♦ Flexible Input Ranges

0 to +5V (MAX1316/MAX1317/MAX1318) ±5V (MAX1320/MAX1321/MAX1322) ±10V (MAX1324/MAX1325/MAX1326)

♦ No Calibration Needed ♦ 14-Bit, High-Speed, Parallel Interface ♦ Internal or External Clock ♦ +2.5V Internal Reference or +2.0V to +3.0V

External Reference

♦ +5V Analog Supply, +3V to +5V Digital Supply

46mA Analog Supply Current (typ)

1.6mA Digital Supply Current (max) Shutdown and Power-Saving Modes

♦ 48-Pin TQFP Package (7mm ✕ 7mm Footprint)

MAX1316–MAX1318/MAX1320–MAX1322/MAX1324–MAX1326

8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs

with ±10V, ±5V, and 0 to +5V Analog Input Ranges

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

Selector Guide

19-3157; Rev 2; 8/04

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.

Pin Configurations and Typical Operating Circuits appear at end of data sheet.

*Future product—contact factory for availability.

PART TEMP RANGE PIN-PACKAGE

MAX1316ECM -40°C to +85°C 48 TQFP MAX1317ECM -40°C to +85°C 48 TQFP MAX1318ECM -40°C to +85°C 48 TQFP MAX1320ECM -40°C to +85°C 48 TQFP MAX1321ECM -40°C to +85°C 48 TQFP MAX1322ECM -40°C to +85°C 48 TQFP MAX1324ECM -40°C to +85°C 48 TQFP MAX1325ECM -40°C to +85°C 48 TQFP MAX1326ECM -40°C to +85°C 48 TQFP

PART INPUT RANGE (V) CHANNEL COUNT

MAX1316ECM 0 to +5 8 MAX1317ECM 0 to +5 4 MAX1318ECM 0 to +5 2 MAX1320ECM ±5 8 MAX1321ECM ±5 4 MAX1322ECM ±5 2 MAX1324ECM ±10 8 MAX1325ECM ±10 4 MAX1326ECM ±10 2

MAX1316–MAX1318/MAX1320–MAX1322/MAX1324–MAX1326

8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs with ±10V, ±5V, and 0 to +5V Analog Input Ranges

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(AVDD= +5V, DVDD= +3V, AGND = DGND = 0V, V

REF

= V

REFMS

= +2.5V (external reference), C

REF

= C

REFMS

= 0.1µF, C

REF+

REF-

= 0.1µF, C

REF+-to-REF-

= 2.2µF || 0.1µF, C

COM

= 2.2µF || 0.1µF, C

MSV

= 2.2µF || 0.1µF (unipolar devices, MAX1316/

MAX1317/MAX1318), MSV = AGND (bipolar devices, MAX1320/MAX1321/MAX1322/MAX1324/MAX1325/MAX1326), f

CLK

= 10MHz,

50% duty cycle, INTCLK/

EXTCLK = AGND (external clock), SHDN = DGND, TA = T

MIN

to T

MAX

, unless otherwise noted. Typical val-

ues are at T

= +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.

to AGND.........................................................-0.3V to +6V

to DGND.........................................................-0.3V to +6V

AGND to DGND.....................................................-0.3V to +0.3V

CH0–CH7, I.C. to AGND (MAX1316/MAX1317/MAX1318)...±6.0V CH0–CH7, I.C. to AGND (MAX1320/MAX1321/MAX1322).±16.5V CH0–CH7, I.C. to AGND (MAX1324/MAX1325/MAX1326).±16.5V

INTCLK/EXTCLK to AGND.......................-0.3V to (AV

+ 0.3V)

EOC, EOLC, WR, RD, CS to DGND.........-0.3V to (DV

+ 0.3V)

CONVST, CLK, SHDN,

ALLON to DGND..................................-0.3V to (DV

+ 0.3V)

MSV, REF

, REF to AGND.....................-0.3V to (AV

+ 0.3V)

REF+, COM, REF- to AGND.....................-0.3V to (AV

+ 0.3V)

D0–D13 to DGND ....................................-0.3V to (DV

+ 0.3V)

Maximum Current into Any Pin Except AV

, DVDD,

AGND, DGND...............................................................±50mA

Continuous Power Dissipation

TQFP (derate 22.7mW/°C above +70°C)...................1818mW

Operating Temperature Range ...........................-40°C to +85°C

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

Storage Temperature Range.............................-65°C to +150°C

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

PARAMETER

CONDITIONS

UNITS

STATIC PERFORMANCE (Note 1)

Resolution N 14 Bits Integral Nonlinearity INL (Note 2)

LSB

Differential Nonlinearity DNL No missing codes (Note 2)

±1 LSB

Unipolar devices

Offset Error

Bipolar devices

LSB

Unipolar devices -4

Offset Drift

Bipolar devices -4

ppm/°C

Unipolar devices between all channels 35 80

Channel Offset Matching

Bipolar devices between all channels 25 60

LSB

Gain Error (Note 3) ±8

LSB Channel Gain-Error Matching Between all channels 25 LSB Gain Temperature Coefficient 3

ppm/°C

DYNAMIC PERFORMANCE (at fIN = 100kHz, -0.4dB FS)

Unipolar

Signal-to-Noise Ratio SNR

Bipolar 75

Unipolar

Signal-to-Noise and Distortion Ratio

SINAD

Bipolar 75

Spurious-Free Dynamic Range SFDR 83 93 dBc Total Harmonic Distortion THD -90 -83 dBc Channel-to-Channel Isolation 83 dB

ANALOG INPUTS (CH0–CH7)

MAX1316/MAX1317/MAX1318 0 +5 MAX1320/MAX1321/MAX1322 -5 +5

Input Voltage Range

MAX1324/MAX1325/MAX1326 -10

SYMBOL

MIN TYP MAX

±0.8 ±2.0 ±0.5

±40

74.5

76.5

74.5

76.5

±40

+10

MAX1316–MAX1318/MAX1320–MAX1322/MAX1324–MAX1326

8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs

with ±10V, ±5V, and 0 to +5V Analog Input Ranges

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(AVDD= +5V, DVDD= +3V, AGND = DGND = 0V, V

REF

= V

REFMS

= +2.5V (external reference), C

REF

= C

REFMS

= 0.1µF, C

REF+

REF-

= 0.1µF, C

REF+-to-REF-

= 2.2µF || 0.1µF, C

COM

= 2.2µF || 0.1µF, C

MSV

= 2.2µF || 0.1µF (unipolar devices, MAX1316/

MAX1317/MAX1318), MSV = AGND (bipolar devices, MAX1320/MAX1321/MAX1322/MAX1324/MAX1325/MAX1326), f

CLK

= 10MHz,

50% duty cycle, INTCLK/EXTCLK = AGND (external clock), SHDN = DGND, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical val-

ues are at T

= +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

VIN = 0V

VIN = -5V

Input Current (Note 4)

MAX1316/MAX1317/MAX1318 MAX1320/MAX1321/MAX1322

Input Resistance (Note 4)

MAX1324/MAX1325/MAX1326

Ω

Input Capacitance 15 pF

TRACK/HOLD

One channel Two channels Four channels

External-Clock Throughput Rate (Note 5)

Eight channels One channel (INTCLK/EXTCLK = AVDD) Two channels (INTCLK/EXTCLK = AVDD) Four channels (INTCLK/EXTCLK = AVDD)

Internal-Clock Throughput Rate (Note 5)

Eight channels (INTCLK/EXTCLK = AV

) Small-Signal Bandwidth 10 Full-Power Bandwidth 10 Aperture Delay 16 ns Aperture Jitter 50 Aperture-Delay Matching

INTERNAL REFERENCE

REFMS Voltage

REF Voltage V

REF

REF Temperature Coefficient 30

EXTERNAL REFERENCE (REFMS AND REF EXTERNALLY DRIVEN)

Input Current

µA

REFMS Input Voltage Range

Unipolar devices 2.0 2.5 3.0 V

REF Voltage Input Range V

REF

2.0 2.5 3.0 V REF Input Capacitance 15 pF REFMS Input Capacitance 15 pF

DIGITAL INPUTS (D0–D7, RD, WR, CS, CLK, SHDN, ALLON, CONVST)

Input-Voltage High V

0.7 x V

REFMS

MAX1316/MAX1317/MAX1318

MAX1320/MAX1321/MAX1322

MAX1324/MAX1325/MAX1326

VIN = +5V 0.54 0.72

VIN = +5V 0.29 0.39

VIN = +10V 0.56 0.74

= -10V -1.13 -0.85

-0.157 -0.12

-1.16 -0.87

2.475 2.500 2.525

-250 +250

7.58

8.66

14.26

526 455 357 250 526 455 357 250

100

ksps

MHz MHz

RMS

ppm/°C

MAX1316–MAX1318/MAX1320–MAX1322/MAX1324–MAX1326

8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs with ±10V, ±5V, and 0 to +5V Analog Input Ranges

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(AVDD= +5V, DVDD= +3V, AGND = DGND = 0V, V

REF

= V

REFMS

= +2.5V (external reference), C

REF

= C

REFMS

= 0.1µF, C

REF+

REF-

= 0.1µF, C

REF+-to-REF-

= 2.2µF || 0.1µF, C

COM

= 2.2µF || 0.1µF, C

MSV

= 2.2µF || 0.1µF (unipolar devices, MAX1316/

MAX1317/MAX1318), MSV = AGND (bipolar devices, MAX1320/MAX1321/MAX1322/MAX1324/MAX1325/MAX1326), f

CLK

= 10MHz,

50% duty cycle, INTCLK/EXTCLK = AGND (external clock), SHDN = DGND, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical val-

ues are at T

= +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Input-Voltage Low V

0.3 x V

Input Hysteresis 15 mV Input Capacitance C

15 pF

Input Current I

VIN = 0V or DV

±1µA

CLOCK-SELECT INPUT (INTCLK/EXTCLK)

Input-Voltage High

0.7 x V

Input-Voltage Low

0.3 x V

DIGITAL OUTPUTS (D0–D13, EOC, EOLC)

Output-Voltage High V

SOURCE

= 0.8mA

0.6

Output-Voltage Low V

SINK

= 1.6mA 0.4 V

Tri-State Leakage Current RD ≥ VIH or CS ≥ V

1µA

Tri-State Output Capacitance RD ≥ VIH or CS ≥ V

15 pF

POWER SUPPLIES

Analog-Supply Voltage AV

Digital-Supply Voltage DV

MAX1316/MAX1317/MAX1318, all channels selected

46 51

MAX1320/MAX1321/MAX1322, all channels selected

46 51

Analog-Supply Current I

AVDD

MAX1324/MAX1325/MAX1326, all channels selected

46 51

MAX1316/MAX1317/MAX1318, all channels selected

1 1.6

MAX1320/MAX1321/MAX1322, all channels selected

1 1.6

Digital-Supply Current (Note 6) I

DVDD

LOAD

100pF

MAX1324/MAX1325/MAX1326, all channels selected

1 1.6

AVDD

SHDN

= DVDD, VCH = float 10

Shutdown Current (Note 7)

DVDD

V RD = V WR = DVDD, V

SHDN

= DV

0.1 2

µA

Power-Supply Rejection Ratio PSRR AVDD = +4.75V to +5.75V (Note 8) 50 dB

0.06

4.75 5.25

2.70 5.25

MAX1316–MAX1318/MAX1320–MAX1322/MAX1324–MAX1326

8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs

with ±10V, ±5V, and 0 to +5V Analog Input Ranges

_______________________________________________________________________________________ 5

Note 1: For the MAX1316/MAX1317/MAX1318, VIN= 0 to +5V. For the MAX1320/MAX1321/MAX1322, VIN= -5V to +5V. For the

MAX1324/MAX1325/MAX1326, V

= -10V to +10V.

Note 2: All channel performance is guaranteed by correlation to a single channel test. Note 3: Offset nulled. Note 4: The analog input resistance is terminated to an internal bias point. Calculate the analog input current using:

for V

within the input voltage range.

Note 5: Throughput rate is given per channel. Throughput rate is a function of clock frequency (f

CLK

= 10MHz). See the Data

Throughput section for more information.

Note 6: All analog inputs are driven with an FS 100kHz sine wave.

BIAS

−

TIMING CHARACTERISTICS (Figures 3, 4, 5, 6 and 7) (Tables 1, 3)

PARAMETER

SYMBOL

CONDITIONS MIN TYP MAX

UNITS

Internal clock 1.6 1.8 µs

Time-to-First-Conversion Result t

CONV

External clock, Figure 6 16

Clock

cycles

Internal clock 0.3 0.36 µs

Time-to-Next-Conversion Result t

External clock, Figure 6 3

Clock

cycles

CONVST Pulse-Width Low (Acquisition Time)

ACQ

(Note 9) 0.16 100 µs

CS Pulse Width t

30 ns

RD Pulse-Width Low t

30 ns

RD Pulse-Width High t

30 ns

WR Pulse-Width Low t

30 ns

CS to WR t

WR to CS t

CS to RD t

RD to CS t

Data-Access Time (RD Low to Valid Data)

30 ns

Bus-Relinquish Time (RD High) t

30 ns

Internal clock 80 ns

EOC Pulse Width t

External clock, Figure 6 1

Clock

cycles

Input-Data Setup Time t

10 ns

Input-Data Hold Time t

10 ns

External-Clock Period t

0.08

µs

External-Clock High Period t

Logic sensitive to rising edges 20 ns

External-Clock Low Period t

Logic sensitive to rising edges 20 ns External-Clock Frequency (Note 11) 0.1 12.5 MHz Internal-Clock Frequency 10 MHz CONVST High to CLK Edge t

EOC Low to RD t

0ns

(Note 10) (Note 10) (Note 10) (Note 10)

(Note 12)

10.00

INTEGRAL NONLINEARITY

vs. DIGITAL OUTPUT CODE

MAX1316 toc01

DIGITAL OUTPUT CODE

INL (LSB)

1228881924096

-0.75

-0.50

-0.25

0.25

0.50

0.75

1.00

-1.00 0 16384

DIFFERENTIAL NONLINEARITY

vs. DIGITAL OUTPUT CODE

MAX1316 toc02

DIGITAL OUTPUT CODE

DNL (LSB)

1228881924096

-0.75

-0.50

-0.25

0.25

0.50

0.75

1.00

-1.00 0 16384

ANALOG SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX1316 toc03

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

5.125.004.87

4.75 5.25

SAMPLE

= 250ksps ALL 8 CHANNELS DRIVEN WITH FULLSCALE SINE WAVES

ANALOG SUPPLY CURRENT

vs. TEMPERATURE

MAX1316 toc04

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

603510-15

-40 85

SAMPLE =

250ksps ALL 8 CHANNELS DRIVEN WITH FULLSCALE SINE WAVES

SHUTDOWN CURRENT vs. SUPPLY VOLTAGE

MAX1316 toc05

SUPPLY VOLTAGE (V)

SHUTDOWN CURRENT (µA)

4.53.5

0.2

0.4

0.6

0.8

2.5 5.5

ANALOG

SHUTDOWN

CURRENT

DIGITAL

SHUTDOWN

CURRENT

SHUTDOWN CURRENT

vs. TEMPERATURE

MAX1316 toc06

TEMPERATURE (°C)

SHUTDOWN CURRENT (µA)

603510-15

0.2

0.4

0.6

0.8

-40 85

ANALOG

SHUTDOWN

CURRENT

DIGITAL

SHUTDOWN

CURRENT

MAX1316–MAX1318/MAX1320–MAX1322/MAX1324–MAX1326

8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs with ±10V, ±5V, and 0 to +5V Analog Input Ranges

6 _______________________________________________________________________________________

TIMING CHARACTERISTICS (Figures 3, 4, 5, 6 and 7) (Tables 1, 3) (continued)

Note 7: Shutdown current is measured with analog input floating. The large amplitude of the maximum shutdown current specifi-

cation is due to automatic test equipment limitations.

Note 8: Defined as the change in positive full scale caused by ±5% variation in the nominal supply voltage. Note 9: CONVST must remain low for at least the acquisition period. The maximum acquisition time is limited by internal capacitor

droop.

Note 10: CS-to-WR and CS-to-RD pins are internally AND together. Setup and hold times do not apply. Note 11: Minimum clock frequency is limited only by the internal T/H droop rate. Limit the time between the falling edge of CONVST

to the falling edge of EOLC to a maximum of 0.25ms.

Note 12: To avoid T/H droop degrading the sampled analog input signals, the first clock pulse should occur within 10µs of the ris-

ing edge of CONVST, and have a minimum clock frequency of 100kHz.

Typical Operating Characteristics

(AV

= +5V, DVDD= +3V, AGND = DGND = 0V, V

REF

= V

REFMS

= +2.5V (external reference), see the Typical Operating Circuits sec-

tion, f

CLK

= 10MHz, 50% duty cycle, INTCLK/EXTCLK = AGND (external clock), SHDN = DGND, TA = +25°C, unless otherwise noted.)

Typical Operating Characteristics (continued)

(AV

= +5V, DVDD= +3V, AGND = DGND = 0V, V

REF

= V

REFMS

= +2.5V (external reference), see the Typical Operating Circuits sec-

tion, f

CLK

= 10MHz, 50% duty cycle, INTCLK/EXTCLK = AGND (external clock), SHDN = DGND, TA = +25°C, unless otherwise noted.)

INTERNAL REFERENCE VOLTAGE

vs. ANALOG SUPPLY VOLTAGE

MAX1316 toc07

AVDD (V)

REF

(V)

5.25.14.8 4.9 5.0

2.4997

2.4998

2.4999

2.5000

2.5001

2.5002

2.5003

2.5004

2.4996

4.7 5.3

INTERNAL REFERENCE VOLTAGE

vs. TEMPERATURE

MAX1316 toc08

TEMPERATURE (°C)

REF

(V)

6035-15 10

2.497

2.498

2.499

2.500

2.501

2.502

2.503

2.504

2.496

-40 85

OFFSET ERROR vs. SUPPLY VOLTAGE

MAX1316 toc09

AVDD (V)

OFFSET ERROR (LSB)

5.155.054.954.85

-1.5

-1.0

-0.5

0.5

1.0

1.5

-2.0

4.75 5.25

NORMALIZED AT TA = +25°C

MAX1316–MAX1318/MAX1320–MAX1322/MAX1324–MAX1326

8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs

with ±10V, ±5V, and 0 to +5V Analog Input Ranges

_______________________________________________________________________________________ 7

OFFSET ERROR vs. TEMPERATURE

MAX1316 toc10

TEMPERATURE (°C)

OFFSET ERROR (%FSR)

6035-15 10

-0.03

-0.02

-0.01

0.02

0.01

0.03

0.04

-0.04

-40 85

NORMALIZED AT TA = +25°C

GAIN ERROR vs. SUPPLY VOLTAGE

MAX1316 toc11

AVDD (V)

GAIN ERROR (LSB)

5.155.054.954.85

4.75 5.25

GAIN ERROR vs. TEMPERATURE

MAX1316 toc12

TEMPERATURE (°C)

GAIN ERROR (%FSR)

6035-15 10

0.02

0.03

0.04

0.05

0.07

0.06

0.08

0.09

0.01

-40 85

Typical Operating Characteristics (continued)

(AV

= +5V, DVDD= +3V, AGND = DGND = 0V, V

REF

= V

REFMS

= +2.5V (external reference), see the Typical Operating Circuits sec-

tion, f

CLK

= 10MHz, 50% duty cycle, INTCLK/EXTCLK = AGND (external clock), SHDN = DGND, TA = +25°C, unless otherwise noted.)

FFT

MAX1316 toc13

FREQUENCY (MHz)

AMPLITUDE (dB)

0.200.150.100.05

-120

-100

-80

-60

-40

-20

-140 0 0.25

ANALOG_IN

= 103kHz

SAMPLE

= 490kHz

CLK

= 10MHz SINAD = 76.7dB SNR = 77.0dB THD = -88.3dB SFDR = 91.0dB

SIGNAL-TO-NOISE RATIO

vs. CLOCK FREQUENCY

MAX1316 toc14

CLK

(MHz)

SNR (dB)

1816141210

820

fIN = 100kHz

SIGNAL-TO-NOISE PLUS DISTORTION

vs. CLOCK FREQUENCY

MAX1316 toc15

CLK

(MHz)

SINAD (dB)

1816141210

820

= 100kHz

EFFECTIVE NUMBER OF BITS

vs. CLOCK FREQUENCY

MAX1316 toc16

CLK

(MHz)

ENOB (BITS)

1816141210820

11.0

11.5

12.0

12.5

13.0

13.5

10.5

= 100kHz

TOTAL HARMONIC DISTORTION

vs. CLOCK FREQUENCY

MAX1316 toc17

CLK

(MHz)

THD (dB)

1816141210820

-95

-90

-85

-80

-75

-70

-100

SPURIOUS-FREE DYNAMIC RANGE

vs. CLOCK FREQUENCY

MAX1316 toc17b

CLK

(MHz)

SFDR (dB)

1816141210820

100

MAX1316–MAX1318/MAX1320–MAX1322/MAX1324–MAX1326

8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs with ±10V, ±5V, and 0 to +5V Analog Input Ranges

8 _______________________________________________________________________________________

OUTPUT HISTOGRAM

(DC INPUT)

MAX1316 toc20

DIGITAL OUTPUT CODE

COUNTS

821782168214 82158211 8212 82138210

500

1000

1500

2000

2500

3000

3500

4000

4500

01013

8209

2306

1562

154

341

3815

CONVERSION TIME vs. TEMPERATURE

MAX1316 toc19

TEMPERATURE (°C)

CONVERSION TIME (µs)

603510-15

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

-40 85

CONV

INTERNAL CLOCK

CONVERSION TIME

vs. ANALOG SUPPLY VOLTAGE

MAX1316 toc18

ANALOG SUPPLY VOLTAGE (V)

CONVERSION TIME (µs)

5.1255.0004.875

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

4.750 5.250

CONV

INTERNAL CLOCK

Typical Operating Characteristics (continued)

(AV

= +5V, DVDD= +3V, AGND = DGND = 0V, V

REF

= V

REFMS

= +2.5V (external reference), see the Typical Operating Circuits sec-

tion, f

CLK

= 10MHz, 50% duty cycle, INTCLK/EXTCLK = AGND (external clock), SHDN = DGND, TA = +25°C, unless otherwise noted.)

MAX1316–MAX1318/MAX1320–MAX1322/MAX1324–MAX1326

8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs

with ±10V, ±5V, and 0 to +5V Analog Input Ranges

_______________________________________________________________________________________ 9

Pin Description

MAX1316 MAX1320 MAX1324

MAX1317 MAX1321 MAX1325

MAX1318 MAX1322 MAX1326

NAME FUNCTION

1, 15, 17 1, 15, 17 1, 15, 17 AV

Analog Supply Input. AVDD is the power input for the analog section of the converter. Apply 4.75V to 5.25V to AV

. Bypass AVDD to AGND (pin 14 to pin 15, pin 16 to pin 17, pin 1 to pin 2) with a 0.1µF capacitor at each AV

input.

2, 3, 14, 16, 23

AGND

Analog Ground. AGND is the power return for AV

. Connect all

AGNDs together.

4 4 4 CH0 Channel 0 Analog Input 5 5 5 CH1 Channel 1 Analog Input

666MSV

Midscale Voltage Bypass. For the MAX1316/MAX1317/MAX1318, connect a 2.2µF and a 0.1µF capacitor from MSV to AGND. For the MAX1320/MAX1321/MAX1322/MAX1324/MAX1325/MAX1326, connect MSV directly to AGND.

7 7 — CH2 Channel 2 Analog Input 8 8 — CH3 Channel 3 Analog Input 9 — — CH4 Channel 4 Analog Input

2, 3, 14, 16, 23 2, 3, 14, 16, 23

+ 18 hidden pages