Maxim MAX1113CPE, MAX1113CEE, MAX1112MJP, MAX1112EPP, MAX1112EAP Datasheet

KIT

EVALUATION

AVAILABLE

Description

-power, 8-bit, 8-chan- (ADCs) that feature an clock, and serial a single +4.5V to +5.5V while sampling at 8 analog inputs

inputs are software-con- and single-

are performed an external serial-inter- input range is deterreference, or by an from 1V to VDD. with the SPI™, -interface standards.

the end-of-conversion

.

a software-program- down mode to minimize -down, the supply 1ksps, and only 82µA at be controlled using the

SHDN input pin. Accessing the serial interface automatically powers up the device.

The MAX1112 is available in 20-pin SSOP and DIP packages. The MAX1113 is available in small 16-pin QSOP and DIP packages.

________________________Applications

Portable Data Logging

Hand-Held Measurement Devices

Medical Instruments

System Diagnostics

Solar-Powered Remote Systems

4–20mA-Powered Remote

Data-Acquisition Systems

Pin Configurations appear at end of data sheet.

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

Serial 8-Bit ADCs

____________________________Features

♦+4.5V to +5.5V Single Supply

♦Low Power: 135µA at 50ksps

13µA at 1ksps

♦8-Channel Single-Ended or 4-Channel Differential Inputs (MAX1112)

♦4-Channel Single-Ended or 2-Channel Differential Inputs (MAX1113)

♦Internal Track/Hold; 50kHz Sampling Rate

♦Internal 4.096V Reference

♦SPI/QSPI/MICROWIRE-Compatible Serial Interface

♦Software-Configurable Unipolar or Bipolar Inputs

♦Total Unadjusted Error: ±1LSB (max)

±0.3LSB (typ)

Ordering Information

PART	TEMP. RANGE	PIN-PACKAGE
MAX1112CPP	0°C to +70°C	20 Plastic DIP
MAX1112CAP	0°C to +70°C	20 SSOP
MAX1112C/D	0°C to +70°C	Dice*

*Dice are specified at TA = +25°C, DC parameters only.

Ordering Information continued at end of data sheet.

Functional Diagram

CS
SCLK
	INPUT		INT
DIN	SHIFT		CLOCK
	REGISTER	CONTROL
SHDN		LOGIC
CH0			OUTPUT	DOUT
CH1
			SHIFT
CH2	ANALOG		REGISTER	SSTRB
CH3		T/H
CH4*	INPUT	CLOCK
	MUX
CH5*		IN
			8-BIT
CH6*
		SAR ADC
CH7*
			OUT
COM			REF	VDD
REFOUT		+4.096V	MAX1112	DGND
	REFERENCE			AGND
			MAX1113
REFIN

*MAX1112 ONLY

________________________________________________________________ Maxim Integrated Products 1

MAX1112/MAX1113

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone]. For small orders, phone [phone].

MAX1112/MAX1113

+5V, Low-Power, Multi-Channel,

Serial 8-Bit ADCs

ABSOLUTE MAXIMUM RATINGS

VDD to AGND..............................................................	-0.3V to 6V
AGND to DGND .......................................................	-0.3V to 0.3V
CH0–CH7, COM, REFIN,	-0.3V to (VDD + 0.3V)
REFOUT to AGND ...................................
Digital Inputs to DGND ...............................................	-0.3V to 6V
Digital Outputs to DGND............................	-0.3V to (VDD + 0.3V)

Continuous Power Dissipation (TA = +70°C)
16 Plastic DIP (derate 10.53mW/°C above +70°C) ......	842mW
16 QSOP (derate 8.30mW/°C above +70°C)................	667mW
16 CERDIP (derate 10.00mW/°C above +70°C) ..........	800mW

20 Plastic DIP (derate 11.11mW/°C above +70°C)		......889mW
20 SSOP (derate 8.00mW/°C above +70°C)	................	640mW
20 CERDIP (derate 11.11mW/°C above +70°C) ..........		889mW
Operating Temperature Ranges
MAX1112C_P/MAX1113C_E................................	0°C to +70°C
MAX1112E_P/MAX1113E_E .............................	- 40°C to +85°C
MAX1112MJP/MAX1113MJE..........................	- 55°C to +125°C
Storage Temperature Range .............................	- 65°C to +150°C
Lead Temperature (soldering, 10sec) .............................		+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

(VDD = +4.5V to +5.5V; unipolar input mode; COM = 0V; fSCLK = 500kHz, external clock (50% duty cycle); 10 clocks/conversion cycle (50ksps); 1µF capacitor at REFOUT; TA = TMIN to TMAX; unless otherwise noted.)

PARAMETER	SYMBOL	CONDITIONS	MIN	TYP	MAX	UNITS
DC ACCURACY
Resolution			8			Bits
Relative Accuracy (Note 1)	INL			±0.1	±0.5	LSB
Differential Nonlinearity	DNL	No missing codes over temperature			±1	LSB
Offset Error				±0.3	±1	LSB
Gain Error (Note 2)		Internal or external reference			±1	LSB
Gain Temperature Coefficient		External reference, 4.096V		±0.8		ppm/°C
Total Unadjusted Error	TUE	MAX111_C/E		±0.3	±1	LSB
Channel-to-Channel				±0.1		LSB
Offset Matching
DYNAMIC SPECIFICATIONS (10.034kHz sine-		wave input, 4.096Vp-p, 50ksps, 500kHz external clock)
Signal-to-Noise	SINAD			49		dB
and Distortion Ratio
Total Harmonic Distortion	THD			-70		dB
(up to the 5th harmonic)
Spurious-Free Dynamic Range	SFDR			68		dB
Channel-to-Channel Crosstalk		VCH_ = 4.096Vp-p, 25kHz (Note 3)		-75		dB
Small-Signal Bandwidth		-3dB rolloff		1.5		MHz
Full-Power Bandwidth				800		kHz

2 _______________________________________________________________________________________

+5V, Low-Power, Multi-Channel,

Serial 8-Bit ADCs

ELECTRICAL CHARACTERISTICS (continued)

(VDD = +4.5V to +5.5V; unipolar input mode; COM = 0V; fSCLK = 500kHz, external clock (50% duty cycle); 10 clocks/conversion cycle (50ksps); 1µF capacitor at REFOUT; TA = TMIN to TMAX; unless otherwise noted.)

PARAMETER	SYMBOL	CONDITIONS			MIN	TYP	MAX	UNITS
CONVERSION RATE
Conversion Time (Note 4)	tCONV	Internal clock				25	55	µs
		External clock, 500kHz, 10 clocks/conversion			20
Track/Hold Acquisition Time	tACQ	External clock, 2MHz			1			µs
Aperture Delay						10		ns
Aperture Jitter						<50		ps
Internal Clock Frequency						400		kHz
External Clock-Frequency Range		(Note 5)			50		500	kHz
		Used for data transfer only					2	MHz
ANALOG INPUT
Input Voltage Range, Single-		Unipolar input, COM = 0V			0		VREFIN
								V
							COM ±
Ended and Differential (Note 6)		Bipolar input, COM = VREFIN / 2
						VREFIN / 2
Multiplexer Leakage Current		On/off leakage current, VCH_ = 0V or VDD				±0.01	±1	µA
Input Capacitance						18		pF
INTERNAL REFERENCE
REFOUT Voltage					3.936	4.096	4.256	V
REFOUT Short-Circuit Current						6		mA
REFOUT Temperature Coefficient						±50		ppm/°C
Load Regulation (Note 7)		0mA to 0.5mA output load				4.5		mV
Capacitive Bypass at REFOUT					1			µF
EXTERNAL REFERENCE AT REFIN
Input Voltage Range					1		VDD +	V
							50mV
Input Current		(Note 8)				1	20	µA
POWER REQUIREMENTS
Supply Voltage	VDD				4.5		5.5	V
		Full-scale input		Operating mode		135	250
		CLOAD = 10pF		Reference disabled		95		µA
Supply Current	IDD							µA
		Power-down		Software		2
				SHDN at DGND		3.2	10
Power-Supply Rejection	PSR	VDD = 4.5V to 5.5V; external reference,				±0.4	±4	mV
(Note 9)		4.096V; full-scale input

MAX1112/MAX1113

_______________________________________________________________________________________ 3

MAX1112/MAX1113

+5V, Low-Power, Multi-Channel,

Serial 8-Bit ADCs

ELECTRICAL CHARACTERISTICS (continued)

(VDD = +4.5V to +5.5V; unipolar input mode; COM = 0V; fSCLK = 500kHz, external clock (50% duty cycle); 10 clocks/conversion cycle (50ksps); 1µF capacitor at REFOUT; TA = TMIN to TMAX; unless otherwise noted.)

PARAMETER		SYMBOL	CONDITIONS		MIN	TYP	MAX	UNITS
DIGITAL INPUTS: DIN, SCLK, CS
DIN, SCLK, CS Input High Voltage		VIH			3			V
DIN, SCLK, CS Input Low Voltage		VIL					0.8	V
DIN, SCLK, CS Input Hysteresis		VHYST				0.2		V
DIN, SCLK, CS Input Leakage		IIN	Digital inputs = 0V or VDD				±1	µA
DIN, SCLK, CS Input Capacitance		CIN	(Note 5)				15	pF
SHDN INPUT
SHDN Input High Voltage		VSH			VDD - 0.4			V
SHDN Input Mid-Voltage		VSM			1.1		VDD - 1.1	V
SHDN Voltage, Floating		VFLT	SHDN = open			VDD / 2		V
SHDN Input Low Voltage		VSL					0.4	V
SHDN Input Current			SHDN = 0V or VDD				±4	µA
SHDN Maximum Allowed Leakage			SHDN = open				±100	nA
for Mid-Input
DIGITAL OUTPUTS: DOUT, SSTRB
Output Low Voltage		VOL	ISINK = 5mA				0.4	V
			ISINK = 16mA				0.8
Output High Voltage		VOH	ISOURCE = 0.5mA		VDD - 0.5			V
Three-State Leakage Current		IL	CS = VDD			±0.01	±10	µA
Three-State Output Capacitance		COUT	CS = VDD (Note 5)				15	pF

4 _______________________________________________________________________________________

+5V, Low-Power, Multi-Channel,

Serial 8-Bit ADCs

TIMING CHARACTERISTICS (Figures 8 and 9)

(VDD = +4.5V to +5.5V, TA = TMIN to TMAX, unless otherwise noted.)

PARAMETER	SYMBOL	CONDITIONS			MIN	TYP	MAX	UNITS
Track/Hold Acquisition Time	tACQ				1			µs
DIN to SCLK Setup	tDS				100			ns
DIN to SCLK Hold	tDH				0			ns
SCLK Fall to Output Data Valid	tDO	Figure 1,	MAX111_C/E		20		200	ns
		CLOAD = 100pF	MAX111_M		20		240
CS Fall to Output Enable	tDV	Figure 1, CLOAD = 100pF					240	ns
CS Rise to Output Disable	tTR	Figure 2, CLOAD = 100pF					240	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					240	ns
CS Fall to SSTRB Output Enable	tSDV	Figure 1, external clock mode only,					240	ns
(Note 5)		CLOAD = 100pF
CS Rise to SSTRB Output	tSTR	Figure 2, external clock mode only,					240	ns
Disable (Note 5)		CLOAD = 100pF
SSTRB Rise to SCLK Rise	tSCK	Figure 11, internal clock mode only			0			ns
(Note 5)
Wakeup Time	tWAKE	External reference				20		µs
		Internal reference (Note 10)				24		ms

Note 1: Relative accuracy is the analog value’s deviation (at any code) from its theoretical value after the full-scale range is calibrated. Note 2: VREFIN = 4.096V, offset nulled.

Note 3: On-channel grounded; sine wave applied to all off-channels.

Note 4: Conversion time is defined as the number of clock cycles multiplied by the clock period; clock has 50% duty cycle. Note 5: Guaranteed by design. Not subject to production testing.

Note 6: Common-mode range for the analog inputs is from AGND to VDD.

Note 7: External load should not change during the conversion for specified accuracy. Note 8: External reference at 4.096V, full-scale input, 500kHz external clock.

Note 9: Measured as | VFS (4.5V) - VFS (5.5V) |.

Note 10: 1µF at REFOUT; internal reference settling to 0.5LSB.

MAX1112/MAX1113

_______________________________________________________________________________________ 5

MAX1112/MAX1113

+5V, Low-Power, Multi-Channel,

Serial 8-Bit ADCs

__________________________________________Typical Operating Characteristics

(VDD = +5.0V; fSCLK = 500kHz; external clock (50% duty cycle); RL = ∞; TA = +25°C, unless otherwise noted.)

	SUPPLY CURRENT vs. TEMPERATURE				SHUTDOWN SUPPLY CURRENT				DIFFERENTIAL NONLINEARITY
					vs. TEMPERATURE				vs. CODE
	180	MAX1112/13-01	A)(μ	10		MAX1112/13-02		0.3	MAX1112/13-03
	OUTPUT CODE = FULL SCALE				SHDN = DGND
	CLOAD = 10pF			8				0.2
A)(CURRENTSUPPLYμ	160		CURRENTSUPPLYSHUTDOWN				(LSB)DNL	-0.2
				2
	VDD = 5.5V			6				0.1
	140							0
	VDD = 4.5V			4				-0.1
	120

100								0								-0.3
-60		-20	20	60	100	140		-60		-20	20	60	100	140		0		64	128	192	256
			TEMPERATURE (°C)								TEMPERATURE (°C)								DIGITAL CODE

OFFSET ERROR (LSB)

0.6

0.5

0.4

0.3

0.2

0.1

0

OFFSET ERROR vs. TEMPERATURE

MAX1112/13-04

-60

-20

20

60

100

140

TEMPERATURE (°C)

INL (LSB)

0.20

0.15

0.10

0.05

0

-0.05

-0.10

-0.15

-0.20

INTEGRAL NONLINEARITY vs. CODE

AMPLITUDE (dB)

MAX1112/13-05

0

64

128

192

256

DIGITAL CODE

			FFT PLOT
20										06
										-
					fCH_	= 10.034kHz, 4Vp-p				MAX1112/13
0					fSAMPLE = 50ksps
-20
-40
-60
-80
-100
0		5	10		15		20		25

FREQUENCY (kHz)

6 _______________________________________________________________________________________