Maxim Integrated Producs MAX1034, MAX1035EUP Datasheet

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19-3574; Rev 1; 12/06

8-/4-Channel, ±VREF Multirange Inputs,

Serial 14-Bit ADCs

General Description

The MAX1034/MAX1035 multirange, low-power, 14-bit, successive-approximation, analog-to-digital converters (ADCs) operate from a single +5V supply and achieve throughput rates up to 115ksps. A separate digital supply allows digital interfacing with 2.7V to 5.25V systems using the SPI™-/QSPI™-/MICROWIRE™-compatible serial interface. Partial power-down mode reduces the supply current to 1.3mA (typ). Full power-down mode reduces the power-supply current to 1µA (typ).

The MAX1034 provides eight (single-ended) or four (true differential) analog input channels. The MAX1035 provides four (single-ended) or two (true differential) analog input channels. Each analog input channel is independently software programmable for seven single-ended input ranges (0 to +VREF/2, -VREF/2 to 0, 0 to +VREF, -VREF to 0, ±VREF/4, ±VREF/2, and ±VREF), and three differential input ranges (±VREF/2, ±VREF, ±2 x VREF).

An on-chip +4.096V reference offers a small convenient ADC solution. The MAX1034/MAX1035 also accept an external reference voltage between 3.800V and 4.136V.

The MAX1034 is available in a 24-pin TSSOP package and the MAX1035 is available in a 20-pin TSSOP package. Each device is specified for operation from -40°C to +85°C.

Applications

Industrial Control Systems

Data-Acquisition Systems

Avionics

Robotics

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

Features

Software-Programmable Input Range for Each Channel

Single-Ended Input Ranges

0 to +VREF/2, -VREF/2 to 0, 0 to +VREF, -VREF to 0, ±VREF/4, ±VREF/2, and ±VREF

Differential Input Ranges

±VREF/2, ±VREF, and ±2 x VREF

Eight Single-Ended or Four Differential Analog Inputs (MAX1034)

Four Single-Ended or Two Differential Analog Inputs (MAX1035)

±6V Overvoltage Tolerant Inputs

Internal or External Reference

115ksps Maximum Sample Rate

Single +5V Power Supply

20-/24-Pin TSSOP Package

Ordering Information

PART

PIN-

CHANNELS

PKG CODE

PACKAGE

 

 

 

 

 

 

 

MAX1034EUG*

24 TSSOP

8

U24-1

 

 

 

 

MAX1035EUP

20 TSSOP

4

U20-2

 

 

 

 

*Future product—contact factory for availability.

Note: All devices are specified over the -40°C to +85°C operating temperature range.

Pin Configurations

TOP VIEW

AVDD1

1

 

 

 

 

24

AGND1

 

 

 

 

 

 

 

 

 

AGND2

CH0

2

 

 

 

 

23

 

 

 

 

 

 

 

 

 

AVDD2

CH1

3

 

 

 

 

22

 

 

 

 

 

 

 

 

 

 

CH2

4

 

 

 

 

21

AGND3

 

 

 

 

 

 

 

 

MAX1034

 

 

CH3

5

20

REF

 

 

 

 

 

 

 

 

 

 

CH4

6

 

 

 

 

19

REFCAP

 

 

 

 

 

 

 

 

 

 

CH5

7

 

 

 

 

18

DVDD

 

 

 

 

 

 

 

 

 

 

CH6

8

 

 

 

 

17

DVDDO

 

 

 

 

 

 

 

 

 

 

CH7

9

 

 

 

 

16

DGND

 

 

 

 

 

 

 

 

 

 

 

CS

 

10

 

 

 

 

15

DGNDO

 

 

 

 

 

 

 

 

 

 

DIN

11

 

 

 

 

14

DOUT

 

 

 

 

 

 

 

 

 

 

SSTRB

12

 

 

 

 

13

SCLK

TSSOP

Pin Configurations continued at end of data sheet.

________________________________________________________________ Maxim Integrated Products 1

MAX1034/MAX1035

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.

MAX1034/MAX1035

8-/4-Channel, ±VREF Multirange Inputs,

Serial 14-Bit ADCs

ABSOLUTE MAXIMUM RATINGS

AVDD1 to AGND1 ....................................................

-0.3V to +6V

AVDD2 to AGND2 ....................................................

-0.3V to +6V

DVDD to DGND ........................................................

-0.3V to +6V

DVDDO to DGNDO ..................................................

-0.3V to +6V

DVDD to DVDDO......................................................

-0.3V to +6V

DVDD, DVDDO to AVDD1 ........................................

-0.3V to +6V

AVDD1, DVDD, DVDDO to AVDD2 ..........................

-0.3V to +6V

DGND, DGNDO, AGND3, AGND2 to AGND1 ......-0.3V to +0.3V CS, SCLK, DIN, DOUT, SSTRB to

DGNDO ............................................-0.3V to (DVDDO + 0.3V)

CH0–CH7 to AGND1 ...................................................

 

-6V to +6V

REF, REFCAP to AGND1.......................

-0.3V to (AVDD1 + 0.3V)

Continuous Current (any pin) ...........................................

 

±50mA

Continuous Power Dissipation (TA = +70°C)

 

20-Pin TSSOP (derate 11mW/°C above +70°C) ..........

879mW

24-Pin TSSOP (derate 12.2mW/°C above +70°C) .......

976mW

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

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

(AVDD1 = AVDD2 = DVDD = DVDDO = 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, fCLK = 3.5MHz (50% duty cycle), external clock mode, VREF = 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input range (±VREF), CDOUT = 50pF, CSSTRB = 50pF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

 

 

 

 

 

 

 

 

DC ACCURACY (Notes 1, 2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Resolution

 

 

 

14

 

 

Bits

 

 

 

 

 

 

 

 

Integral Nonlinearity

INL

 

 

 

±0.25

±1

LSB

 

 

 

 

 

 

 

 

Differential Nonlinearity

DNL

No missing codes

 

 

 

±1

LSB

Transition Noise

 

External or internal reference

 

0.5

 

LSBRMS

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Single-ended inputs

Unipolar

 

0

±10

 

 

 

 

 

 

 

 

Offset Error

 

Bipolar

 

-1.0

±10

mV

 

 

 

 

 

 

 

 

 

 

Differential inputs

Unipolar

 

0

±20

 

 

 

 

 

 

(Note 3)

Bipolar

 

-2

±20

 

Channel-to-Channel Gain

 

Unipolar or bipolar

 

 

0.025

 

%FSR

Matching

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Channel-to-Channel Offset Error

 

Unipolar or bipolar

 

 

1.0

 

mV

Matching

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Offset Temperature Coefficient

 

Unipolar

 

 

10

 

ppm/°C

 

 

 

 

 

 

 

Bipolar

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gain Error

 

Unipolar

 

 

 

±0.5

%FSR

 

Bipolar

 

 

 

±0.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gain Temperature Coefficient

 

Unipolar

 

 

1.5

 

ppm/°C

 

Bipolar

 

 

1.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unipolar Endpoint Overlap

 

Negative unipolar full scale to positive

0

5

 

LSB

 

unipolar zero-scale

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 _______________________________________________________________________________________

8-/4-Channel, ±VREF Multirange Inputs,

Serial 14-Bit ADCs

ELECTRICAL CHARACTERISTICS (continued)

(AVDD1 = AVDD2 = DVDD = DVDDO = 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, fCLK = 3.5MHz (50% duty cycle), external clock mode, VREF = 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input range (±VREF), CDOUT = 50pF, CSSTRB = 50pF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DYNAMIC SPECIFICATIONS fIN(SINE-WAVE) = 5kHz, VIN = FSR - 0.05dB, fSAMPLE = 130ksps (Notes 1, 2)

 

 

 

 

Differential inputs, FSR = 2 x VREF

 

84.5

 

 

Signal-to-Noise Plus Distortion

SINAD

Single-ended inputs, FSR = VREF

 

84

 

dB

Single-ended inputs, FSR = VREF / 2

 

82.5

 

 

 

 

 

 

 

 

Single-ended inputs, FSR = VREF / 4

79

80.5

 

 

 

 

Differential inputs, FSR = 2 x VREF

 

84.5

 

 

Signal-to-Noise Ratio

SNR

Single-ended inputs, FSR = VREF

 

84

 

dB

Single-ended inputs, FSR = VREF / 2

 

82.5

 

 

 

 

 

 

 

 

Single-ended inputs, FSR = VREF / 4

 

80.5

 

 

Total Harmonic Distortion

THD

 

 

-98

 

dB

(Up to the 5th Harmonic)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Spurious-Free Dynamic Range

SFDR

 

92

99

 

dB

 

 

 

 

 

 

 

Aperture Delay

tAD

Figure 21

 

15

 

ns

Aperture Jitter

tAJ

Figure 21

 

100

 

ps

Channel-to-Channel Isolation

 

 

 

105

 

dB

 

 

 

 

 

 

 

CONVERSION RATE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

External clock mode, Figure 2

 

 

114

 

 

 

 

 

 

 

 

Byte-Wide Throughput Rate

fSAMPLE

External acquisition mode, Figure 3

 

 

84

ksps

 

 

Internal clock mode, Figure 4

 

 

106

 

ANALOG INPUTS (CH0–CH3 MAX1035, CH0–CH7 MAX1034, AGND1)

 

 

 

 

Small-Signal Bandwidth

 

All input ranges, VIN = 100mVP-P (Note 2)

 

2

 

MHz

Full-Power Bandwidth

 

All input ranges, VIN = 4VP-P (Note 2)

 

700

 

kHz

 

 

R[2:1] = 001

-VREF/4

 

+VREF/4

 

 

 

R[2:1] = 010

-VREF/2

 

0

 

 

 

R[2:1] = 011

0

 

+VREF/2

 

Input Voltage Range (Table 6)

VCH_

R[2:1] = 100

-VREF/2

 

+VREF/2

V

 

 

R[2:1] = 101

-VREF

 

0

 

 

 

R[2:1] = 110

0

 

+VREF

 

 

 

R[2:1] = 111

-VREF

 

+VREF

 

True-Differential Analog

VCMDR

DIF/SGL = 1 (Note 4)

-4.75

 

+5.50

V

Common-Mode Voltage Range

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Common-Mode Rejection Ratio

CMRR

DIF/SGL = 1, input voltage range = ±VREF/4

 

75

 

dB

Input Current

ICH_

-VREF < VCH_ < +VREF

-1500

 

+650

µA

Input Capacitance

CCH_

 

 

5

 

pF

Input Resistance

RCH_

 

 

6

 

kΩ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX1034/MAX1035

_______________________________________________________________________________________ 3

MAX1034/MAX1035

8-/4-Channel, ±VREF Multirange Inputs,

Serial 14-Bit ADCs

ELECTRICAL CHARACTERISTICS (continued)

(AVDD1 = AVDD2 = DVDD = DVDDO = 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, fCLK = 3.5MHz (50% duty cycle), external clock mode, VREF = 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input range (±VREF), CDOUT = 50pF, CSSTRB = 50pF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

 

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

 

 

 

 

 

 

 

INTERNAL REFERENCE (Bypass REFCAP with 0.1µF to AGND1 and REF with 1.0µF to AGND1)

 

 

 

 

 

 

 

 

 

 

 

Reference Output Voltage

 

VREF

 

4.056

4.096

4.136

V

Reference Temperature

 

TCREF

 

 

±30

 

ppm/°C

Coefficient

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reference Short-Circuit Current

 

IREFSC

REF shorted to AGND1

 

10

 

mA

 

REF shorted to AVDD

 

-1

 

 

 

 

 

 

 

Reference Load Regulation

 

 

IREF = 0 to 0.5mA

 

0.1

10

mV

EXTERNAL REFERENCE (REFCAP = AVDD)

 

 

 

 

 

Reference Input Voltage Range

 

VREF

 

3.800

 

4.136

V

REFCAP Buffer Disable

 

VRCTH

(Note 5)

AVDD1

 

AVDD1

V

Threshold

 

- 0.4

 

- 0.1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VREF = +4.096V, external clock mode,

 

 

 

 

Reference Input Current

 

IREF

external acquisition mode, internal clock

 

90

200

µA

 

mode, or partial power-down mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VREF = +4.096V, full power-down mode

 

±0.1

±10

 

 

 

 

External clock mode, external acquisition

 

 

 

 

Reference Input Resistance

 

RREF

mode, internal clock mode, or partial

20

45

 

kΩ

 

power-down mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Full power-down mode

 

40

 

 

 

 

 

 

 

 

 

 

DIGITAL INPUTS (DIN, SCLK, CS)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input High Voltage

 

VIH

 

0.7 x

 

 

V

 

 

DVDDO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input Low Voltage

 

VIL

 

 

 

0.3 x

V

 

 

 

 

DVDDO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input Hysteresis

 

VHYST

 

 

0.2

 

V

Input Leakage Current

 

IIN

VIN = 0 to DVDDO

-10

 

+10

µA

Input Capacitance

 

CIN

 

 

10

 

pF

DIGITAL OUTPUTS (DOUT, SSTRB)

 

 

 

 

 

 

 

 

 

 

 

 

 

Output Low Voltage

 

VOL

DVDDO = 4.75V, ISINK = 10mA

 

 

0.4

V

 

DVDDO = 2.7V, ISINK = 5mA

 

 

0.4

 

 

 

 

 

 

Output High Voltage

 

VOH

ISOURCE = 0.5mA

DVDDO

 

 

V

 

- 0.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DOUT Tri-State Leakage Current

 

IDDO

CS = DVDDO

-10

 

+10

µA

POWER REQUIREMENTS (AVDD1 and AGND1, AVDD2 and AGND2, DVDD and DGND, DVDDO and DGNDO)

 

 

Analog Supply Voltage

 

AVDD1

 

4.75

 

5.25

V

Digital Supply Voltage

 

DVDD

 

4.75

 

5.25

V

 

 

 

 

 

 

 

 

4 _______________________________________________________________________________________

8-/4-Channel, ±VREF Multirange Inputs,

Serial 14-Bit ADCs

ELECTRICAL CHARACTERISTICS (continued)

(AVDD1 = AVDD2 = DVDD = DVDDO = 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, fCLK = 3.5MHz (50% duty cycle), external clock mode, VREF = 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input range (±VREF), CDOUT = 50pF, CSSTRB = 50pF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

 

 

 

 

 

 

 

 

 

Preamplifier Supply Voltage

AVDD2

 

 

 

4.75

 

5.25

V

Digital I/O Supply Voltage

DVDDO

 

 

 

2.70

 

5.25

V

 

 

External clock mode,

Internal reference

 

3

3.5

 

AVDD1 Supply Current

IAVDD1

external acquisition

 

 

 

 

 

mA

mode, or internal

 

External reference

 

2.5

3

 

 

 

 

 

 

 

clock mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DVDD Supply Current

IDVDD

External clock mode, external acquisition

 

0.9

2

mA

mode, or internal clock mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AVDD2 Supply Current

IAVDD2

External clock mode, external acquisition

 

17.5

25

mA

mode, or internal clock mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DVDDO Supply Current

IDVDDO

External clock mode, external acquisition

 

0.2

1

mA

mode, or internal clock mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total Supply Current

 

Partial power-down mode

 

1.3

 

mA

 

 

 

 

 

 

 

 

 

Full power-down mode

 

 

1

 

µA

 

 

 

 

 

 

 

 

 

 

 

 

 

Power-Supply Rejection Ratio

PSRR

All analog input ranges

 

 

±0.125

 

LSB

 

 

 

 

 

 

 

 

 

TIMING CHARACTERISTICS (Figures 15 and 16)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

External clock mode

 

272

 

62

 

SCLK Period

tCP

 

 

 

 

µs

External acquisition mode

228

 

62

 

 

Internal clock mode

 

100

 

83

 

 

 

 

 

 

 

 

 

 

 

External clock mode

 

109

 

 

 

 

 

 

 

 

 

 

SCLK High Pulse Width (Note 6)

tCH

External acquisition mode

92

 

 

ns

 

 

Internal clock mode

 

40

 

 

 

 

 

 

 

 

 

 

 

 

 

External clock mode

 

109

 

 

 

SCLK Low Pulse Width (Note 6)

tCL

External acquisition mode

92

 

 

ns

 

 

Internal clock mode

 

40

 

 

 

DIN to SCLK Setup

tDS

 

 

 

40

 

 

ns

DIN to SCLK Hold

tDH

 

 

 

0

 

 

ns

SCLK Fall to DOUT Valid

tDO

 

 

 

 

 

40

ns

CS Fall to DOUT Enable

tDV

 

 

 

 

 

40

ns

CS Rise to DOUT Disable

tTR

 

 

 

 

 

40

ns

CS Fall to SCLK Rise Setup

tCSS

 

 

 

40

 

 

ns

CS High Minimum Pulse Width

tCSPW

 

 

 

40

 

 

ns

SCLK Fall to CS Rise Hold

tCSH

 

 

 

0

 

 

ns

SSTRB Rise to CS Fall Setup

 

(Note 4)

 

40

 

 

ns

 

 

 

 

 

 

 

 

DOUT Rise/Fall Time

 

CL = 50pF

 

 

10

 

ns

SSTRB Rise/Fall Time

 

CL = 50pF

 

 

10

 

ns

 

 

 

 

 

 

 

 

 

MAX1034/MAX1035

_______________________________________________________________________________________ 5

MAX1034/MAX1035

8-/4-Channel, ±VREF Multirange Inputs,

Serial 14-Bit ADCs

ELECTRICAL CHARACTERISTICS (continued)

(AVDD1 = AVDD2 = DVDD = DVDDO = 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, fCLK = 3.5MHz (50% duty cycle), external clock mode, VREF = 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input range (±VREF), CDOUT = 50pF, CSSTRB = 50pF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

Note 1: Parameter tested at AVDD1 = AVDD2 = DVDD = DVDDO = 5V.

Note 2: See definitions in the Parameter Definitions section at the end of the data sheet. Note 3: Guaranteed by correlation with single-ended measurements.

Note 4: Not production tested. Guaranteed by design.

Note 5: To ensure external reference operation, VREFCAP must exceed (AVDD1 - 0.1V). To ensure internal reference operation, VREFCAP must be below (AVDD1 - 0.4V). Bypassing REFCAP with a 0.1µF or larger capacitor to AGND1 sets VREFCAP 4.096V. The transition point between internal reference mode and external reference mode lies between the REFCAP buffer disable threshold minimum and maximum values (Figures 17 and 18).

Note 6: The SCLK duty cycle can vary between 40% and 60%, as long as the tCL and tCH timing requirements are met.

Typical Operating Characteristics

(AVDD1 = AVDD2 = DVDD = DVDDO = 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, fCLK = 3.5MHz (50% duty cycle), external clock mode, VREF = 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input range (±VREF), CDOUT = 50pF, CSSTRB = 50pF, unless otherwise noted.)

ANALOG SUPPLY CURRENT

PREAMPLIFIER SUPPLY CURRENT

vs. ANALOG SUPPLY VOLTAGE

vs. PREAMPLIFIER SUPPLY VOLTAGE

 

2.60

 

 

 

 

toc01

 

24

 

 

 

 

toc02

 

EXTERNAL CLOCK MODE

 

 

 

EXTERNAL CLOCK MODE

 

 

 

 

 

MAX1034/35

 

 

 

MAX1034/35

 

 

 

 

 

 

 

22

 

 

 

 

 

2.55

 

 

 

 

 

 

23

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.50

 

TA = +85°C

 

 

 

21

 

TA = +85°C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(mA)

 

 

 

 

 

(mA)

 

 

 

 

 

 

 

TA = +25°C

 

 

20

 

 

 

 

 

AVDD1

2.45

 

 

 

AVDD2

 

 

 

 

 

 

 

 

19

 

°

 

 

 

I

 

 

 

 

 

 

I

 

 

TA = +25 C

 

 

 

 

2.40

 

TA = -40°C

 

 

 

 

18

 

 

 

 

 

 

 

 

 

 

 

 

 

17

 

°

 

 

 

 

2.35

 

 

 

 

 

 

 

 

TA = -40 C

 

 

 

 

 

 

 

 

 

 

16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.30

 

 

 

 

 

 

15

 

 

 

 

 

 

4.75

4.85

4.95

5.05

5.15

5.25

 

4.75

4.85

4.95

5.05

5.15

5.25

 

 

 

AVDD1 (V)

 

 

 

 

 

AVDD2 (V)

 

 

DIGITAL SUPPLY CURRENT vs. DIGITAL SUPPLY VOLTAGE

 

0.90

 

 

 

 

toc03

 

EXTERNAL CLOCK MODE

 

 

 

 

 

MAX1034/35

 

0.85

 

 

 

 

 

 

 

 

 

 

(mA)

0.80

 

TA = +85°C

 

 

 

 

TA = +25°C

 

 

 

 

 

 

DVDD

0.75

 

 

 

 

 

I

 

 

 

 

 

 

 

TA = -40°C

 

 

 

 

 

 

 

 

0.70

 

 

 

 

 

 

0.65

 

 

 

 

 

 

4.75

4.85

4.95

5.05

5.15

5.25

 

 

 

DVDD (V)

 

 

6 _______________________________________________________________________________________

8-/4-Channel, ±VREF Multirange Inputs,

Serial 14-Bit ADCs

Typical Operating Characteristics (continued)

(AVDD1 = AVDD2 = DVDD = DVDDO = 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, fCLK = 3.5MHz (50% duty cycle), external clock mode, VREF = 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input range (±VREF), CDOUT = 50pF, CSSTRB = 50pF, unless otherwise noted.)

DIGITAL I/O SUPPLY CURRENT

ANALOG SUPPLY CURRENT

vs. DIGITAL I/O SUPPLY VOLTAGE

vs. ANALOG SUPPLY VOLTAGE

 

0.28

EXTERNAL CLOCK MODE

 

 

toc04

 

0.55

 

 

 

 

toc05

 

0.24

 

 

 

PARTIAL POWER-DOWN MODE

 

 

 

 

 

 

 

MAX1034/35

 

0.53

 

 

 

 

MAX1034/35

 

0.26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.22

TA = +85°C

 

 

 

 

 

 

 

TA = +85°C

 

 

 

(mA)

 

 

 

 

(mA)

0.51

 

 

 

 

 

0.20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DVDDO

0.18

 

 

TA = +25°C

 

 

 

AVDD1

 

 

TA = +25°C

 

 

 

 

 

 

 

 

 

0.49

 

 

 

 

 

I

 

 

 

 

 

 

 

I

 

 

 

 

 

 

0.16

 

 

TA = -40°C

 

 

 

 

 

°

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TA = -40 C

 

 

 

 

0.14

 

 

 

 

 

 

 

0.47

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.10

4.75

4.85

4.95

5.05

5.15

5.25

 

0.45

 

 

 

 

 

 

 

 

4.75

4.85

4.95

5.05

5.15

5.25

 

 

 

 

DVDDO (V)

 

 

 

 

 

AVDD1 (V)

 

 

MAX1034/MAX1035

PREAMPLIFIER SUPPLY CURRENT vs. PREAMPLIFIER SUPPLY VOLTAGE

 

0.20

 

 

 

 

toc06

 

PARTIAL POWER-DOWN MODE

 

 

 

MAX1034/35

 

0.18

 

 

 

TA = +85°C

 

 

 

 

 

(mA)

0.16

 

 

 

 

 

TA = +25°C

 

 

 

 

AVDD2

 

 

 

 

0.14

 

 

 

 

 

I

 

 

 

 

 

 

TA = -40°C

 

 

 

 

 

 

 

 

 

0.12

 

 

 

 

 

 

0.10

 

 

 

 

 

 

4.75

4.85

4.95

5.05

5.15

5.25

AVDD2 (V)

DIGITAL SUPPLY CURRENT vs. DIGITAL SUPPLY VOLTAGE

 

0.136

 

 

 

 

toc07

 

PARTIAL POWER-DOWN MODE

 

 

 

MAX1034/35

 

0.134

 

 

 

 

 

0.132

 

TA = +85°C

 

 

(mA)

0.130

 

 

 

 

 

0.128

 

 

 

 

 

DVDD

 

 

 

 

 

 

 

 

 

 

 

I

0.126

 

 

 

 

 

 

 

 

 

 

 

 

0.124

 

TA = -40°C

 

 

 

0.122

TA = +25°C

 

 

 

 

0.120

 

 

 

 

 

 

4.75

4.85

4.95

5.05

5.15

5.25

DVDD (V)

_______________________________________________________________________________________ 7

MAX1034/MAX1035

8-/4-Channel, ±VREF Multirange Inputs,

Serial 14-Bit ADCs

Typical Operating Characteristics (continued)

(AVDD1 = AVDD2 = DVDD = DVDDO = 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, fCLK = 3.5MHz (50% duty cycle), external clock mode, VREF = 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input range (±VREF), CDOUT = 50pF, CSSTRB = 50pF, unless otherwise noted.)

ANALOG SUPPLY CURRENT vs. CONVERSION RATE

 

3.0

 

 

 

toc08

 

 

 

 

 

 

2.5

EXTERNAL CLOCK MODE

 

MAX1034/35

 

 

 

 

 

 

 

 

 

(mA)

2.0

PARTIAL

 

 

 

 

 

 

 

 

POWER-DOWN MODE

 

 

AVDD1

1.5

 

 

 

 

 

 

 

 

 

 

 

I

 

 

 

 

 

 

1.0

 

FULL

 

 

 

 

 

 

 

 

0.5

 

POWER-DOWN MODE

 

 

 

 

 

 

 

0

 

 

 

 

 

0

50

100

150

200

 

 

CONVERSION RATE (ksps)

 

PREAMPLIFIER SUPPLY CURRENT vs. CONVERSION RATE

 

25

fCLK = 7.5MHz (NOTE 6)

 

toc09

 

 

 

 

 

 

MAX1034/35

 

20

EXTERNAL CLOCK MODE

 

(mA)

15

FULL POWER-DOWN MODE,

 

 

 

PARTIAL POWER-DOWN MODE

 

 

AVDD2

 

 

 

10

 

 

 

 

I

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

0

 

 

 

 

 

0

50

100

150

200

CONVERSION RATE (ksps)

DIGITAL SUPPLY CURRENT vs. CONVERSION RATE

 

1.8

fCLK = 7.5MHz (NOTE 6)

 

toc10

 

 

 

 

1.6

 

MAX1034/35

 

 

 

 

 

1.4

 

 

 

 

1.2

EXTERNAL CLOCK MODE,

 

 

(mA)

PARTIAL POWER-DOWN MODE

 

 

 

 

 

1.0

 

 

 

 

DVDD

0.8

 

 

 

 

I

 

 

 

 

 

0.6

 

 

 

 

 

0.4

 

FULL POWER-DOWN MODE

 

 

0.2

 

 

 

 

 

 

 

 

0

 

 

 

 

 

0

50

100

150

200

CONVERSION RATE (ksps)

DIGITAL I/O SUPPLY CURRENT vs. CONVERSION RATE

 

0.6

fCLK = 7.5MHz (NOTE 6)

 

toc11

 

 

 

 

 

 

MAX1034/35

 

0.5

 

EXTERNAL CLOCK MODE

 

 

 

 

 

 

 

(mA)

0.4

 

 

 

 

 

 

 

 

 

DVDDO

0.3

 

 

 

 

 

 

 

 

 

I

 

 

 

 

 

 

0.2

 

 

 

 

 

0.1

 

FULL POWER-DOWN MODE,

 

 

 

 

 

 

0

 

PARTIAL POWER-DOWN MODE

 

 

 

 

 

 

 

0

50

100

150

200

CONVERSION RATE (ksps)

Note 6: For partial power-down and full power-down modes, external clock mode was used for a burst of continuous samples. Partial power-down or full power-down modes were entered thereafter. By using this method, the conversion rate was found by averaging the number of conversions over the time starting from the first conversion to the end of the partial power-down or full power-down modes.

8 _______________________________________________________________________________________

Maxim Integrated Producs MAX1034, MAX1035EUP Datasheet

8-/4-Channel, ±VREF Multirange Inputs,

Serial 14-Bit ADCs

Typical Operating Characteristics (continued)

(AVDD1 = AVDD2 = DVDD = DVDDO = 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, fCLK = 3.5MHz (50% duty cycle), external clock mode, VREF = 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input range (±VREF), CDOUT = 50pF, CSSTRB = 50pF, unless otherwise noted.)

EXTERNAL REFERENCE INPUT CURRENT

GAIN DRIFT

vs. EXTERNAL REFERENCE INPUT VOLTAGE

vs. TEMPERATURE

 

0.16

 

 

 

 

 

 

toc12

 

0.10

 

ALL MODES

 

 

 

 

 

0.08

CURRENT (mA)

 

 

 

 

MAX1034/35

 

 

 

 

 

 

 

 

 

0.15

 

 

 

 

 

 

 

0.06

 

 

 

 

 

 

 

0.04

 

 

 

 

 

 

 

(%)

 

 

 

 

 

 

 

0.02

REFERENCE

 

 

 

 

 

 

 

 

GAIN DRIFT

0.14

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

-0.02

 

 

 

 

 

 

 

 

 

EXTERNAL

0.13

 

 

 

 

 

 

 

 

-0.04

 

 

 

 

 

 

 

 

-0.06

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-0.08

 

 

 

 

 

 

 

 

 

 

 

0.12

 

 

 

 

 

 

 

 

-0.10

 

3.80

3.85

3.90

3.95

4.00

4.05

4.10

4.15

 

 

 

 

EXTERNAL REFERENCE VOLTAGE (V)

 

 

 

 

toc13

±VREF BIPOLAR RANGE

MAX1034/35

 

+VREF/2 BIPOLAR

 

±VREF/4 BIPOLAR

 

-40

-15

10

35

60

85

 

 

TEMPERATURE (°C)

 

 

OFFSET DRIFT vs. TEMPERATURE

 

1.0

 

 

 

 

toc14

 

0.8

 

 

 

 

 

 

 

 

 

MAX1034/35

 

0.6

 

+VREF/4 BIPOLAR RANGE

 

 

 

 

 

(mV)

0.4

 

 

 

 

 

 

 

 

0.2

 

 

 

 

 

ERROR

 

 

 

 

 

0

 

 

 

 

 

OFFSET

-0.2

 

 

 

 

 

-0.4

 

 

 

 

 

 

 

 

±VREF BIPOLAR

 

 

 

-0.6

 

 

 

 

 

 

 

 

 

 

 

-0.8

 

 

 

 

 

 

-1.0

 

 

 

 

 

 

-40

-15

10

35

60

85

 

 

 

TEMPERATURE (°C)

 

 

CHANNEL-TO-CHANNEL ISOLATION

COMMON-MODE REJECTION RATIO

INTEGRAL NONLINEARITY

vs. INPUT FREQUENCY

vs. FREQUENCY

vs. DIGITAL OUTPUT CODE

 

0

fSAMPLE = 115ksps

 

 

MAX1034/35toc15

0

fSAMPLE = 115ksps

 

 

MAX1034/35toc16

 

1.0

fSAMPLE = 115ksps

 

 

MAX1034/35toc17

 

 

 

 

-10

 

 

 

 

 

 

 

-20

±VREF BIPOLAR RANGE

 

 

±VREF BIPOLAR RANGE

 

 

 

 

±VREF BIPOLAR RANGE

 

 

 

CH0 TO CH2

 

 

 

-20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-30

 

 

 

 

 

 

 

 

 

(dB)ISOLATION

-40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(dB)CMRR

-60

 

 

 

 

(LSB)INL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-40

 

 

 

 

 

 

 

 

 

 

 

-60

 

 

 

 

-50

 

 

 

 

 

0

 

 

 

 

 

-80

 

 

 

 

-70

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-0.5

 

 

 

 

 

 

 

 

 

 

-80

 

 

 

 

 

 

 

 

 

 

-100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-90

 

 

 

 

 

 

 

 

 

 

 

-120

 

 

 

 

-100

 

 

 

 

 

-1.0

 

 

 

 

 

1

10

100

1000

10,000

1

10

100

1000

10,000

 

0

4096

8192

12,288

16,383

FREQUENCY (kHz) FREQUENCY (kHz) DIGITAL OUTPUT CODE

 

 

 

DIFFERENTIAL NONLINEARITY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

vs. DIGITAL OUTPUT CODE

 

 

 

 

 

FFT AT 5kHz

 

 

 

 

 

1.0

 

 

 

 

 

 

 

 

 

toc18

0

 

 

 

 

 

 

 

toc19

 

 

 

fSAMPLE = 115ksps

 

 

 

 

 

 

 

 

 

 

fSAMPLE = 115ksps

 

 

 

 

 

 

 

 

 

 

MAX1034/35

 

 

 

 

 

MAX1034/35

 

 

 

±VREF BIPOLAR RANGE

 

 

 

 

-20

 

 

 

fIN(SINE WAVE) = 5kHz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DNL(LSB)

0.5

 

 

 

 

 

 

 

 

 

 

-40

 

 

 

±VREF BIPOLAR RANGE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAGNITUDE(dB)

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

-60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-0.5

 

 

 

 

 

 

 

 

 

 

-100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-120

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-1.0

 

 

 

 

 

 

 

 

 

 

-140

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

4096

8192

12,288

16,383

0

10

20

30

40

50

 

 

 

 

 

 

DIGITAL OUTPUT CODE

 

 

 

 

 

FREQUENCY (kHz)

 

 

 

MAX1034/MAX1035

_______________________________________________________________________________________ 9

MAX1034/MAX1035

8-/4-Channel, ±VREF Multirange Inputs,

Serial 14-Bit ADCs

Typical Operating Characteristics (continued)

(AVDD1 = AVDD2 = DVDD = DVDDO = 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, fCLK = 3.5MHz (50% duty cycle), external clock mode, VREF = 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input range (±VREF), CDOUT = 50pF, CSSTRB = 50pF, unless otherwise noted.)

SNR, SINAD, ENOB

vs. ANALOG INPUT FREQUENCY

 

100

 

MAX1034/35 toc20

16

 

 

90

 

 

 

15

 

 

80

 

 

 

14

 

SNR, SINAD (dB)

70

 

SNR

 

13

 

60

 

SINAD

 

12

ENOB (BITS)

50

 

 

 

11

40

 

ENOB

 

10

 

30

 

 

 

9

 

 

20

fSAMPLE = 115ksps

 

 

8

 

 

10

 

 

7

 

 

±VREF BIPOLAR RANGE

 

 

 

 

0

 

 

6

 

 

 

 

 

 

 

1

10

100

1000

 

FREQUENCY (kHz)

-SFDR, THD vs. SAMPLE RATE

 

0

fIN(SINE WAVE) = 5kHz

 

 

toc22

 

 

 

 

 

 

 

 

MAX1034/35

 

-20

±VREF BIPOLAR RANGE

 

 

 

 

 

 

 

 

 

 

THD (dB)

-40

 

 

 

 

-60

 

 

 

 

-SFDR,

 

 

 

 

-80

 

 

 

 

 

 

 

 

 

 

-100

THD

 

 

 

 

 

 

 

 

 

-120

 

 

-SFDR

 

 

 

 

 

 

 

0.1

1

10

100

1000

SAMPLE RATE (ksps)

SNR, SINAD, ENOB vs. SAMPLE RATE

 

100

MAX1034/35 toc21

14

 

 

ENOB

 

 

 

 

 

 

80

SNR, SINAD

13

 

 

 

 

 

SNR, SINAD (dB)

60

 

12

ENOB (BITS)

40

 

11

 

 

 

 

20

 

10

 

fIN(SINE WAVE) = 5kHz

±VREF BIPOLAR RANGE

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.1

1

10

100

1000

SAMPLE RATE (ksps)

-SFDR, THD vs. ANALOG INPUT FREQUENCY

 

0

fSAMPLE = 115ksps

 

toc23

 

 

 

 

 

 

MAX1034/35

 

-20

±VREF BIPOLAR RANGE

 

 

 

 

 

 

 

 

THD (dB)

-40

 

 

 

-60

 

 

 

-SFDR,

 

 

 

-80

 

 

 

 

 

 

 

 

 

THD

 

 

 

-100

-SFDR

 

 

 

 

 

 

 

-120

 

 

 

 

1

10

100

1000

 

 

FREQUENCY (kHz)

 

 

 

 

 

ANALOG INPUT CURRENT

 

 

 

 

 

 

 

vs. ANALOG INPUT VOLTAGE

 

 

 

1.5

 

 

 

 

 

 

 

 

 

 

 

toc24

 

 

 

ALL MODES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX1034/35

(mA)

1.0

 

 

 

 

 

 

 

 

 

 

 

CURRENT

 

 

 

 

 

 

 

 

 

 

 

 

0.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INPUT

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANALOG

-0.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-1.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-1.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-6

-4

-2

0

2

4

6

ANALOG INPUT VOLTAGE (V)

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