MAXIM MAX1393, MAX1396 Technical data

General Description

The MAX1393/MAX1396 micropower, serial-output, 12­bit, analog-to-digital converters (ADCs) operate with a
single power supply from +1.5V to +3.6V. These ADCs
feature automatic shutdown, fast wake-up, and a high­speed 3-wire interface. Power consumption is only

0.734mW (VDD= +1.5V) at the maximum conversion rate
of 312.5ksps. AutoShutdown™ between conversions
reduces power consumption at slower throughput rates.

The MAX1393/MAX1396 require an external reference
V

REF

that has a wide range from 0.6V to VDD. The
MAX1393 provides one true-differential analog input
that accepts signals ranging from 0 to V

REF

(unipolar

mode) or ±V

REF

/2 (bipolar mode). The MAX1396 pro­vides two single-ended inputs that accept signals rang­ing from 0 to V

REF

. Analog conversion results are
available through a 5MHz 3-wire SPI™-/QSPI™-/
MICROWIRE™-/digital signal processor (DSP)-compati­ble serial interface. Excellent dynamic performance,
low voltage, low power, ease of use, and small pack­age sizes make these converters ideal for portable bat­tery-powered data-acquisition applications, and for
other applications that demand low power consumption
and minimal space.

The MAX1393/MAX1396 are available in a space-saving
(3mm x 3mm) 10-pin TDFN package or 10-pin µMAX

®

package. The parts operate over the extended (-40°C to
+85°C) and military (-55°C to +125°C) temper­ature ranges.

Applications

Portable Datalogging

Data Acquisition

Medical Instruments

Battery-Powered Instruments

Process Control

Features

♦ 312.5ksps, 12-Bit Successive-Approximation

Register (SAR) ADCs

♦ Single True-Differential Analog Input Channel

with Unipolar-/Bipolar-Select Input (MAX1393)

♦ Dual Single-Ended Input Channel with Channel-

Select Input (MAX1396)

♦ ±1 LSB INL, ±1 LSB DNL, No Missing Codes

♦ ±2 LSB Total Unadjusted Error (TUE)

♦ 70dB SINAD at 75kHz Input Frequency

♦ External Reference (0.6V to V

DD

)

♦ Single-Supply Voltage (+1.5V to +3.6V)

♦ 0.915mW at 300ksps, 1.8V

♦ 0.305mW at 100ksps, 1.8V

♦ 3.1µW at 1ksps, 1.8V

♦ < 1µA Shutdown Current

♦ AutoShutdown Between Conversions

♦ SPI-/QSPI-/MICROWIRE-/DSP-Compatible,

3- or 4-Wire Serial Interface

♦ Small (3mm x 3mm) 10-Pin TDFN or µMAX

(3mm x 5mm) Package

MAX1393/MAX1396

1.5V to 3.6V, 312.5ksps, 1-Channel True-Differential/
2-Channel Single-Ended, 12-Bit, SAR ADCs

________________________________________________________________ Maxim Integrated Products 1

19-3644; Rev 0; 5/05

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.

PART TEMP RANGE PIN-PACKAGE ANALOG INPUTS TOP MARK

MAX1393ETB -40°C to +85°C 10 TDFN-EP** 1-CH DIFF AOZ

MAX1393EUB -40°C to +85°C 10 µMAX 1-CH DIFF —

MAX1393MTB* -55°C to +125°C 10 TDFN-EP** 1-CH DIFF —

MAX1393MUB* -55°C to +125°C 10 µMAX 1-CH DIFF —

MAX1396ETB -40°C to +85°C 10 TDFN-EP** 2-CH S/E APC

MAX1396EUB* -40°C to +85°C 10 µMAX 2-CH S/E —

MAX1396MTB* -55°C to +125°C 10 TDFN-EP** 2-CH S/E —

MAX1396MUB* -55°C to +125°C 10 µMAX 2-CH S/E —

AutoShutdown is a trademark of Maxim Integrated Products, Inc.
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
µMAX is a registered trademark of Maxim Integrated Products, Inc.

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

*Future product—contact factory for availability.
**EP = Exposed pad.

查询MAX1393供应商

MAX1393/MAX1396

2 _______________________________________________________________________________________

1.5V to 3.6V, 312.5ksps, 1-Channel True-Differential/
2-Channel Single-Ended, 12-Bit, SAR ADCs

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V

DD

= +1.5V to +3.6V, V

REF

= VDD, C

REF

= 0.1µF, f

SCLK

= 5MHz, 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 +4V

SCLK,

CS, OE, CH1/CH2, UNI/BIP,

DOUT to GND.........................................-0.3V to (V

DD

+ 0.3V)

AIN+, AIN-, AIN1, AIN2, REF to GND ........-0.3V to (V

DD

+ 0.3V)

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

Continuous Power Dissipation (T

A

= +70°C)

10-Pin TDFN (derate 18.5mW/°C above +70°C) ....1481.5mW

10-Pin µMAX (derate 5.6mW/°C above +70°C) ........444.4mW

Operating Temperature Ranges

MAX139_E_ _...................................................-40°C to +85°C

MAX139_M_ _................................................-55°C to +125°C

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

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

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

PARAMETER

CONDITIONS

UNITS

DC ACCURACY (Note 1)

Resolution 12 Bits

Integral Nonlinearity INL ±1 LSB

Differential Nonlinearity DNL No missing code overtemperature ±1 LSB

Offset Error 0.5 ±2 LSB

Gain Error Offset nulled 0.5 ±2 LSB

Total Unadjusted Error TUE ±2 LSB

Offset-Error Temperature
Coefficient

LSB/°C

Gain-Error Temperature
Coefficient

LSB/°C

Channel-to-Channel Offset
Matching

MAX1396 only

LSB

Channel-to-Channel Gain
Matching

MAX1396 only

LSB

Input Common-Mode Rejection CMR VCM = 0 to VDD, MAX1393 only

mV/V

DYNAMIC SPECIFICATIONS (Note 2)

V

REF

= VDD = 1.6 70

V

REF

= VDD = 1.8–2.5 69Signal-to-Noise Plus Distortion SINAD

V

REF

= VDD = 2.5–3.6 70

dB

V

REF

= VDD = 1.6

V

REF

= VDD = 1.8–2.5 70 71

Signal-to-Noise Ratio SNR

V

REF

= VDD = 2.5–3.6 71

dB

Total Harmonic Distortion THD -83 -75 dBc

Spurious-Free Dynamic Range SFDR -85 -76 dBc

Intermodulation Distortion IMD

f

IN1

= 73kHz at -6.5dBFS,

f

IN2

= 77kHz at -6.5dBFS

-78 dB

Channel-to-Channel Crosstalk MAX1396 only -70 dB

SYMBOL

MIN TYP MAX

±0.004

±0.001

±0.1

±0.1

±0.1

70.5

MAX1393/MAX1396

_______________________________________________________________________________________ 3

1.5V to 3.6V, 312.5ksps, 1-Channel True-Differential/
2-Channel Single-Ended, 12-Bit, SAR ADCs

ELECTRICAL CHARACTERISTICS (continued)

(V

DD

= +1.5V to +3.6V, V

REF

= VDD, C

REF

= 0.1µF, f

SCLK

= 5MHz, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

T

A

= +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Full-Power Bandwidth -3dB point 4

MHz

MAX1393

Full-Linear Bandwidth SINAD > 68dB

MAX1396

kHz

CONVERSION RATE

Conversion Time t

CONV

13 clock cycles 2.6 µs

Throughput Rate

16 clock cycles per conversion; includes

ksps

Power-Up and Acquisition Time t

ACQ

Three SCLK cycles

ns

Aperture Delay t

AD

8ns

Aperture Jitter t

AJ

30 ps

Serial Clock Frequency f

CLK

0.1 5.0

MHz

ANALOG INPUTS (AIN+, AIN-, AIN1, AIN2)

Unipolar 0

Input Voltage Range V

IN

Bipolar, MAX1393 only, (AIN+ - AIN-)

V

Common-Mode Input Voltage
Range

V

CM

0

V

Input Leakage Current

Channel not selected, or conversion
stopped, or in shutdown mode

±1 µA

Input Capacitance 16 pF

REFERENCE INPUT (REF)

REF Input Voltage Range V

REF

0.6

V

DD

+

V

REF Input Capacitance 24 pF

REF DC Leakage Current

µA

REF Input Dynamic Current 312.5ksps 20 60 µA

DIGITAL INPUTS (SCLK, CS, OE, CH1/CH2, UNI/BIP)

Input-Voltage Low V

IL

0.3 x
V

Input-Voltage High V

IH

0.7 x
V

Input Hysteresis

0.06 x
V

Input Leakage Current I

IL

Inputs at GND or V

DD

±1 µA

CS, OE 1

Input Capacitance C

IN

CH1/CH2, UNI/BIP

pF

DIGITAL OUTPUT (DOUT)

Output-Voltage Low V

OL

I

SINK

= 2mA

0.1 x
V

Output-Voltage High V

OH

I

SOURCE

= 2mA

0.9 x
V

200

150

power-up, acquisition, and conversion time

600

-V

/2 +V

REF

Bipolar, MAX1393 only, [(AIN+) + (AIN-)] / 2

V

DD

0.025 ±2.5

V

DD

312.5

V

REF

REF

V

DD

0.05

V

DD

/2

V

DD

12.5

V

DD

MAX1393/MAX1396

4 _______________________________________________________________________________________

1.5V to 3.6V, 312.5ksps, 1-Channel True-Differential/
2-Channel Single-Ended, 12-Bit, SAR ADCs

ELECTRICAL CHARACTERISTICS (continued)

(V

DD

= +1.5V to +3.6V, V

REF

= VDD, C

REF

= 0.1µF, f

SCLK

= 5MHz, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

T

A

= +25°C.)

PARAMETER

CONDITIONS

UNITS

Tri-State Leakage Current I

LT

OE = V

DD

±1 µA

Tri-State Output Capacitance C

OUT

OE = V

DD

10 pF

POWER SUPPLY

Positive Supply Voltage V

DD

1.5 3.6 V

VDD = 1.6V

200

f

SAMPLE

= 100ksps

V

DD

= 3V

260

VDD = 1.6V

600

f

SAMPLE

= 312.5ksps

V

DD

= 3V

800

Power-down mode (Note 4) 5 10

Positive Supply Current (Note 3) I

DD

Power-down mode (Note 5) 0.2

µA

Power-Supply Rejection PSR

µV/V

TIMING CHARACTERISTICS

(V

DD

= +1.5V to +3.6V, V

REF

= VDD, C

REF

= 0.1µF, f

SCLK

= 5MHz, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Figure 1)

PARAMETER

CONDITIONS

SCLK Clock Period t

CP

ns

SCLK Pulse-Width High t

CH

90 ns

SCLK Pulse-Width Low t

CL

90 ns

CS Fall to SCLK Rise Setup t

CSS

80 ns

SCLK Rise to CS Fall Ignore t

CSO

0ns

SCLK Fall to DOUT Valid t

DOV

C

LOAD

= 0 to 30pF 10 80 ns

OE Rise to DOUT Disable t

DOD

620ns

OE Fall to DOUT Enable t

DOE

920ns

CS Pulse-Width High or Low t

CSW

80 ns

OE Pulse-Width High or Low t

OEW

80 ns

CH1/CH2 Setup Time (to the
First SCLK)

t

CHS

MAX1396 only 10 ns

CH1/CH2 Hold Time (to the First
SCLK)

t

CHH

MAX1396 only 0 ns

UNI/BIP Setup Time (to the First
SCLK)

t

UBS

MAX1393 only 10 ns

UNI/BIP Hold Time (to the First
SCLK)

t

UBH

MAX1393 only 0 ns

Note 1: V

DD

= 1.5V, V

REF

= 1.5V, and V

AIN

= 1.5V.

Note 2: V

DD

= 1.5V, V

REF

= 1.5V, V

AIN

= 1.5V

P-P

, f

SCLK

= 5MHz, f

SAMPLE

= 312.5ksps, and fIN(sine wave) = 75kHz.

Note 3: All digital inputs swing between V

DD

and GND. V

REF

= VDD,fIN= 75kHz sine wave, V

AIN

= V

REFP-P,CLOAD

= 30pF on DOUT.

Note 4: CS = V

DD

, OE = UNI/BIP = CH1/CH2 = VDDor GND, SCLK is active.

Note 5: CS = V

DD

, OE = UNI/BIP = CH1/CH2 = VDDor GND, SCLK is inactive.

Note 6: Change in V

AIN

at code boundary 4094.5.

SYMBOL

MIN TYP MAX

176

225

520

710

±2.5

VDD = 1.5V to 3.6V, full-scale input (Note 6) ±150 ±1000

SYMBOL

MIN TYP MAX UNITS

200 10,000

MAX1393/MAX1396

_______________________________________________________________________________________ 5

1.5V to 3.6V, 312.5ksps, 1-Channel True-Differential/
2-Channel Single-Ended, 12-Bit, SAR ADCs

CS

SCLK

DOUT

OE

UNI/BIP OR

CH1/CH2

t

UBS

t

CHS

t

UBH

t

CHH

t

CSO

t

CSS

t

CL

t

CH

t

CP

t

DOE

HIGH-Z

t

DOV

t

OEW

t

CSW

t

DOD

HIGH-Z

Figure 1. Detailed Serial-Interface Timing Diagram

GND

50pF

50pF

DOUT

DOUT

GND

V

DD

a) HIGH IMPEDANCE TO VOH, V

OL

TO VOH,

AND V

OH

TO HIGH IMPEDANCE

b) HIGH IMPEDANCE TO V

OL, VOH

TO VOL,

AND V

OL

TO HIGH IMPEDANCE

10mA

10mA

Figure 2. Load Circuits for Enable/Disable Times

1.5V to 3.6V, 312.5ksps, 1-Channel True-Differential/
2-Channel Single-Ended, 12-Bit, SAR ADCs

MAX1393/MAX1396

6 _______________________________________________________________________________________

DNL ERROR vs. REFERENCE VOLTAGE

MAX1393/96 toc04

REFERENCE VOLTAGE (V)

DNL ERROR (LSB)

3.12.62.11.61.1

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1.0

-1.0

0.6 3.6

VDD = 3.6V

MAX DNL

MIN DNL

OFFSET ERROR vs. SUPPLY VOLTAGE

MAX1393/96 toc05

SUPPLY VOLTAGE (V)

OFFSET ERROR (µV)

V

REF

= 1.5V

TEMPERATURE = +25°C

-300

-200

-100

0

100

200

300

400

-400

3.33.01.8 2.1 2.4 2.71.5 3.6

AIN1

AIN2

OFFSET ERROR vs. TEMPERATURE

MAX1393/96 toc06

TEMPERATURE (°C)

OFFSET ERROR (µV)

95-25 5 35 65

-300

-200

-100

0

100

200

300

400

-400

-55 125

VDD = 2.6V

OFFSET ERROR

vs. REFERENCE VOLTAGE

MAX1393/96 toc07

REFERENCE VOLTAGE (V)

OFFSET ERROR (µV)

3.11.1 1.6 2.1 2.6

-300

-200

-100

0

100

200

300

400

-400

0.6 3.6

VDD = 3.6V

GAIN ERROR vs. SUPPLY VOLTAGE

MAX1393/96 toc08

SUPPLY VOLTAGE (V)

GAIN ERROR (µV)

3.33.01.8 2.1 2.4 2.7

-300

-200

-100

0

100

200

300

400

-400

1.5 3.6

V

REF

= 1.5V

TEMPERATURE = +25°C

GAIN ERROR vs. TEMPERATURE

MAX1393/96 toc09

TEMPERATURE (°C)

GAIN ERROR (µV)

95-25 5 35 65

-300

-200

-100

0

100

200

300

400

-400

-55 125

VDD = 2.6V

AIN1

AIN2

Typical Operating Characteristics

(VDD= +1.5V, V

REF

= +1.5V, C

REF

= 0.1µF, CL= 30pF, f

SCLK

= 5MHz. TA= +25°C, unless otherwise noted.)

INL vs. CODE

MAX1393/96 toc01

CODE

INL (LSB)

358430722048 25601024 1536512

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1.0

-1.0
0 4096

VDD = 1.5V
V

REF

= 1.5V

INL ERROR vs. REFERENCE VOLTAGE

MAX1393/96 toc02

REFERENCE VOLTAGE (V)

INL ERROR (LSB)

3.12.62.11.61.1

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1.0

-1.0

0.6 3.6

VDD = 3.6V

MAX INL

MIN INL

DNL vs. CODE

MAX1393/96 toc03

CODE

DNL (LSB)

358430722048 25601024 1536512

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1.0

-1.0
0 4096

VDD = 1.5V
V

REF

= 1.5V