MAXIM MAX1117, MAX1118, MAX1119 Technical data

General Description

The MAX1117/MAX1118/MAX1119 low-power, 8-bit, dual-channel, analog-to-digital converters (ADCs) feature an internal track/hold (T/H) voltage reference (MAX1117/MAX1119), clock, and serial interface. The MAX1118 is specified from +2.7V to +5.5V and consumes only 135µA at 100ksps. The MAX1117 is specified from +2.7V to +3.6V, and the MAX1119 is specified from +4.5V to +5.5V, each consumes only 175µA at 100ksps.

The full-scale analog input range is determined by the internal reference of +2.048V (MAX1117) or +4.096V (MAX1119), or by an externally applied reference ranging from +1V to VDD(MAX1118). All devices feature an automatic shutdown mode that reduces supply current to <1µA when the device is not in use. The 3-wire serial interface directly connects to SPI™, QSPI™, and MICROWIRE™ devices without external logic. Conversions up to 100ksps are performed using an internal clock.

The MAX1117/MAX1118/MAX1119 are available in an 8-pin SOT23 package with a footprint that is only 11% of an 8-pin plastic DIP.

________________________Applications

Low-Power, Handheld Portable Devices

System Diagnostics

Battery-Powered Test Equipment

Solar-Powered Remote Systems

Receive Signal Strength Indicators

4mA to 20mA Powered Remote Data Acquisition Systems

Features

♦ Single Supply

+2.7V to +3.6V (MAX1117) +2.7V to +5.5V (MAX1118) +4.5V to +5.5V (MAX1119)

♦ Internal Track/Hold: 100kHz Sampling Rate

♦ Internal Reference

+2.048V (MAX1117) +4.096V (MAX1119)

♦ Reference Input Range: 0 to V

(MAX1118)

♦ SPI/QSPI/MICROWIRE-Compatible Serial Interface

♦ Small 8-Pin SOT23 Package

♦ Automatic Power-Down

♦ Analog Input Range: 0 to V

REF

♦ Low Power

175µA at 100ksps (typ) (MAX1117/MAX1119) 135µA at 100ksps (typ) (MAX1118) 18µA at 10ksps (typ) 1µA (typ) in Power-Down Mode

MAX1117/MAX1118/MAX1119

Single-Supply, Low-Power,

2-Channel, Serial 8-Bit ADCs

________________________________________________________________ Maxim Integrated Products 1

SCLK

DOUT

CNVST

GND

( ) ARE FOR MAX1118 ONLY

CH1

CHO

MAX1117 MAX1118 MAX1119

SOT23

TOP VIEW

(REF) I.C

Pin Configuration

19-1857; Rev 0; 11/00

EVALUATION KIT

AVAILABLE

Ordering Information

PART

TEMP. RANGE

PIN-

TO P

M A RK

M A X1 1 1 7 EKA

8 SOT23

M A X1 1 1 8 E K A

8 SOT23 AADX

M A X1 1 1 9 E K A

8 SOT23 AADY

SPI/QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor, Corp.

Functional Diagram appears at end of data sheet.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.

PA CK A G E

-40°C to +85°C

AADW

MAX1117/MAX1118/MAX1119

Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= +2.7V to +3.6V (MAX1117), VDD= +4.5V to +5.5V (MAX1119), VDD= REF = +2.7V to +5.5V (MAX1118),TA= T

MIN

to T

MAX

unless otherwise noted.)

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 +6.0V

CH0,CH1, REF to GND...............................-0.3V to (V

+ 0.3V)

Digital Output to GND ................................-0.3V to (V

+ 0.3V)

Digital Input to GND ..............................................-0.3V to +6.0V

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

Continuous Power Dissipation (T

= +70°C)

8-Pin SOT23 (derate 8.9mW/°C above +70°C)............714mW

Operating Temperature Range

MAX1117EKA ..................................................-40°C to + 85°C

MAX1118EKA ..................................................-40°C to + 85°C

MAX1119EKA ..................................................-40°C to + 85°C

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

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

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

DC ACCURACY

Resolution

Bits

Relative Accuracy (Note 1) INL

Differential Nonlinearity DNL

Offset Error

MAX1118, REF = V

Gain Error

MAX1117/MAX1119

MAX1118

Gain Temperature Coefficient

MAX1117/MAX1119

Total Unadjusted Error TUE MAX1118

Channel-to-Channnel Offset Matching

DYNAMIC PERFORMANCE (25kHz sinewave input, VIN = V

REF(pp)

, f

SCLK

= 5MHz, f

sample

= 100ksps, RIN = 100Ω)

Signal-to-Noise Plus Distortion

Total Harmonic Distortion (Up to the 5th Harmonic)

THD

Spurious-Free Dynamic Range SFDR

Small Signal Bandwidth f

-3dB

ANALOG INPUT

Input Voltage Range

Input Leakage Current

_ = 0 or V

Input Capacitance C

INTERNAL REFERENCE

MAX1117

Voltage V

REF

MAX1119

SINAD

±0.5

±5

±90

±0.5 ±1

±0.1 LSB

-69

±0.7 ±10 µA

2.048

4.096

±1

±5

REF

LSB

%FSR

ppm/°C

LSB

MHz

MAX1117/MAX1118/MAX1119

Single-Supply, Low-Power,

2-Channel, Serial 8-Bit ADCs

_______________________________________________________________________________________ 3

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

EXTERNAL REFERENCE (MAX1118 ONLY)

Input Voltage Range

Input Current Ave, VDD = REF = +5.5V at 100ksps

µA

POWER REQUIREMENTS

MAX1118

MAX1117

Supply Voltage V

MAX1119

MAX1119, f

SAMPLE

= 100ksps,

zero-scale input

MAX1117/MAX1118, f

SAMPLE

= 100ksps,

zero-scale input

MAX1119, f

SAMPLE

= 10ksps,

zero-scale input

MAX1117/MAX1118, f

SAMPLE

= 10ksps,

zero-scale input

Supply Current (Note 2) I

Shutdown

µA

Supply Rejection Ratio PSRR Full-scale or 0 input

LSB/V

DIGITAL INPUTS (CNVST AND SCLK)

Input High Voltage V

Input Low Voltage V

Input Hystersis

Input Current High I

µA

Input Current Low I

µA

Input Capacitance C

DIGITAL OUTPUT (DOUT)

Output High Voltage V

SOURCE

= 2mA

SINK

= 2mA

Output Low Voltage V

SINK

= 4mA

Three-State Leakage Current I

µA

Three-State Output Capacitance

OUT

TIMING CHARACTERISTICS (Figures 6a–6d)

CNVST High Time t

csh

CNVST Low Time t

csi

Conversion Time t

conv

µs

Serial Clock High Time t

Serial Clock Low Time t

Serial Clock Period t

Falling of CNVST to DOUT Active

csd

LOAD

= 100pF, Figure 1

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +2.7V to +3.6V (MAX1117), VDD= +4.5V to +5.5V (MAX1119), VDD= REF = +2.7V to +5.5V (MAX1118),TA= T

MIN

to T

MAX

unless otherwise noted.)

HYST

1.0 V

10 20

2.7 5.5

4.5 5.5

182 230

135 190

19 25

14 21

0.8 10

±0.5 ±1

0.8

0.2

±10

VDD - 0.5

100

200

0.4

0.8

±0.01 ±10

7.5

100

Typical Operating Characteristics

(VDD= +3V (MAX1117), VDD= +5V (MAX1119), VDD= V

REF

= +3V (MAX1118), f

SCLK

= 5MHz, f

SAMPLE

= 100ksps, C

LOAD

= 100pF,

TA = +25°C, unless otherwise noted.)

MAX1117/18/19 toc01

-1.0

-0.4

-0.6

-0.8

-0.2

0.2

0.4

0.6

0.8

1.0

0 10050 150 200 250 300

INTEGRAL NONLINEARITY

vs.OUTPUT CODE

OUTPUT CODE

INL (LSB)

010050 150 200 250 300

DIFFERENTIAL NONLINEARITY

vs.OUTPUT CODE

MAX1117/18/19 toc02

OUTPUT CODE

DNL (LSB)

-1.0

-0.4

-0.6

-0.8

-0.2

0.2

0.4

0.6

0.8

1.0

0.2

0.1

0.4

0.3

0.6

0.5

0.7

SHUTDOWN SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX1117/18/19 toc03

SUPPLY VOLTAGE (V)

SHUTDOWN CURRENT (μA)

2.5 3.5 4.5 5.5

0.1

0.01 0.1 1 10 100

MAX1118

SUPPLY CURRENT vs. CONVERSION RATE

1.0

MAX1117/18/19 toc04

CONVERSION (ksps)

SUPPLY CURRENT (μA)

100.0

10.0

VDD = V

REF

= V

DIGITAL

VDD = +5V

VDD = +3V

MAX1117/18/19 toc05

110

120

140

160

2.5 3.5 4.5 5.5

MAX1118

SUPPLY CURRENT vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (μA)

OUT

= 00000000

= V

REF

= V

DIGITAL INPUTS

100

150

-40 -15 10 35 60 85

MAX1118 SUPPLY CURRENT

vs. TEMPERATURE

MAX1117/18/19 toc06

TEMPERATURE (°C)

SUPPLY CURRENT (μA)

OUT

= 00000000

= V

REF

= V

DIGITAL INPUTS

VDD = +5V

VDD = +3V

MAX1117/MAX1118/MAX1119

Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs

4 _______________________________________________________________________________________

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

Serial Clock Falling Edge to DOUT

LOAD

= 100pF

Serial Clock Rising Edge to DOUT High-Z

chz

LOAD

= 100pF, Figure 2

Last Serial Clock to Next CNVST (Successive Conversions on CH0)

ccs

Note 1: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the full-scale range and off-

set have been calibrated.

Note 2: Input = 0, with logic input levels of 0 and V

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +2.7V to +3.6V (MAX1117), VDD= +4.5V to +5.5V (MAX1119), VDD= REF = +2.7V to +5.5V (MAX1118),TA= T

MIN

to T

MAX

unless otherwise noted.)

10 100

100 500

MAX1117/MAX1118/MAX1119

Single-Supply, Low-Power,

2-Channel, Serial 8-Bit ADCs

_______________________________________________________________________________________ 5

Typical Operating Characteristics (continued)

(VDD= +3V (MAX1117), VDD= +5V (MAX1119), VDD= V

REF

= +3V (MAX1118), f

SCLK

= 5MHz, f

SAMPLE

= 100ksps, C

LOAD

= 100pF,

TA = +25°C, unless otherwise noted.)

0.1

0.01 0.1 1 10 100

MAX1117/MAX1119

SUPPLY CURRENT vs. CONVERSION RATE

1.0

MAX1117/18/19 toc07

CONVERSION (ksps)

SUPPLY CURRENT (μA)

100.0

10.0

MAX1119 V

= +5V

MAX1117 V

= +3V

100

150

200

2.5 3.5 4.5 5.5

MAX1117/MAX1119 SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX1117/18/19 toc08

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (μA)

OUT

= 00000000

= V

DIGITAL INPUTS

MAX1117

MAX1119

100

150

200

-40 -15 3510 60 85

MAX1117/MAX1119

SUPPLY CURRENT vs. TEMPERATURE

MAX1117/18/19 toc09

TEMPERATURE (V)

SUPPLY CURRENT (μA)

OUT

= 00000000

= V

DIGITAL INPUTS

MAX1117 VDD = +3V

MAX1119 VDD = +5V

5.0

5.2

5.3

5.1

5.4

5.5

2.5 3.5 4.5 5.5

CONVERSION TIME

vs. SUPPLY VOLTAGE

MAX1117/18/19 toc11

SUPPLY VOLTAGE (V)

CONVERSION TIME (μs)

5.0

5.2

5.3

5.1

5.4

5.5

-40 -15 10 35 60 85

CONVERSION TIME vs. TEMPERATURE

MAX1117/18/19 toc12

TEMPERATURE (°C)

CONVERSION TIME (μs)

VDD = +3V

VDD = +5V

-120

-80

-100

-60

-40

-20

0 20k10k 30k 40k 50k

FFT PLOT

MAX1117/18/19 toc13

ANALOG INPUT FREQUENCY (Hz)

AMPLITUDE (dB)

-0.2

-0.4

0.2

0.4

2.5 4.53.5 5.5

MAX1118

GAIN ERROR vs. SUPPLY VOLTAGE

MAX1117/18/19 toc14

SUPPLY VOLTAGE (V)

GAIN ERROR (LSB)

REF

= 2.048V

-0.5

-0.2

-0.3

-0.4

-0.1

0.1

0.2

0.3

0.4

0.5

-40 10-15 356085

MAX1118

GAIN ERROR vs. TEMPERATURE

MAX1117/18/19 toc15

TEMPERATURE (°C)

GAIN ERROR (LSB)

VDD = +3V V

REF

= 2.048V

-1.0

-0.6

-0.4

-0.8

-0.2

14532

MAX1118

GAIN ERROR vs. REFERENCE VOLTAGE

MAX1117/18/19 toc16

REFERENCE VOLTAGE (V)

GAIN ERROR (LSB)

VDD = +5.5V

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