Maxim MAX1093AEEG, MAX1093ACEG, MAX1091BCEI, MAX1091AEEI, MAX1091ACEI Datasheet

KIT

EVALUATION

AVAILABLE

250ksps, +3V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface

General Description

The MAX1091/MAX1093 low-power, 10-bit analog-to- digital converters (ADCs) feature a successive-approxi- mation ADC, automatic power-down, fast wake-up (2µs), an on-chip clock, +2.5V internal reference, and a high-speed, byte-wide parallel interface. They operate with a single +3V analog supply and feature a VLOGIC pin that allows them to interface directly with a +1.8V to +3.6V digital supply.

Power consumption is only 5.7mW (VDD = VLOGIC) at the maximum sampling rate of 250ksps. Two softwareselectable power-down modes enable the MAX1091/ MAX1093 to be shut down between conversions; accessing the parallel interface returns them to normal operation. Powering down between conversions can cut supply current to under 10µA at reduced sampling rates.

Both devices offer software-configurable analog inputs for unipolar/bipolar and single-ended/pseudo-differen- tial operation. In single-ended mode, the MAX1091 has eight input channels and the MAX1093 has four input channels (four and two input channels, respectively, when in pseudo-differential mode).

Excellent dynamic performance and low power combined with ease of use and small package size make these converters ideal for battery-powered and dataacquisition applications or for other circuits with demanding power consumption and space requirements.

The MAX1091 is available in a 28-pin QSOP package, while the MAX1093 is available in a 24-pin QSOP. For pin-compatible +5V, 10-bit versions, refer to the MAX1090/MAX1092 data sheet.

		Applications
Industrial Control Systems	Data Logging
Energy Management	Patient Monitoring
Data-Acquisition Systems	Touch Screens

Ordering Information

	PART	TEMP. RANGE	PIN-PACKAGE	INL
				(LSB)
	MAX1091ACEI	0°C to +70°C	28 QSOP	±0.5
	MAX1091BCEI	0°C to +70°C	28 QSOP	±1
	MAX1091AEEI	-40°C to +85°C	28 QSOP	±0.5
	MAX1091BEEI	-40°C to +85°C	28 QSOP	±1

Ordering Information continued at end of data sheet.

Features

♦10-Bit Resolution, ±0.5LSB Linearity

♦+3V Single-Supply Operation

♦User-Adjustable Logic Level (+1.8V to +3.6V)

♦Internal +2.5V Reference

♦Software-Configurable, Analog Input Multiplexer 8-Channel Single-Ended/

4-Channel Pseudo-Differential (MAX1091)

4-Channel Single-Ended/

2-Channel Pseudo-Differential (MAX1093)

♦Software-Configurable, Unipolar/Bipolar Inputs

♦Low Power: 1.9mA (250ksps)

1.0mA (100ksps) 400µA (10ksps) 2µA (Shutdown)

♦Internal 3MHz Full-Power Bandwidth Track/Hold

♦Byte-Wide Parallel (8+2) Interface

♦Small Footprint: 28-Pin QSOP (MAX1091)

24-Pin QSOP (MAX1093)

Pin Configurations

TOP VIEW

HBEN						1					24	VLOGIC
			D7			2					23	VDD
			D6			3					22	REF
			D5			4					21	REFADJ
			D4			5					20	GND
							MAX1093
			D3			6					19	COM
			D2			7					18	CH0
D1/D9						8					17	CH1
D0/D8						9					16	CH2
		INT				10					15	CH3
			RD			11					14		CS
	WR					12					13	CLK

QSOP

Pin Configurations continued at end of data sheet.

Typical Operating Circuits appear at end of data sheet.

________________________________________________________________ Maxim Integrated Products 1

MAX1091/MAX1093

For free samples and the latest literature, visit www.maxim-ic.com or phone [phone]. For small orders, phone [phone].

MAX1091/MAX1093

250ksps, +3V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface

ABSOLUTE MAXIMUM RATINGS

VDD to GND ..............................................................	-0.3V to +6V
VLOGIC to GND.........................................................	-0.3V to +6V
CH0–CH7, COM to GND ............................	-0.3V to (VDD + 0.3V)
REF, REFADJ to GND ................................	-0.3V to (VDD + 0.3V)
Digital Inputs to GND ...............................................	-0.3V to +6V
Digital Outputs (D0–D9, INT) to GND.....	-0.3V to (VLOGIC + 0.3V)

Continuous Power Dissipation (TA = +70°C)
24-Pin QSOP (derate 9.5mW/°C above +70°C) ...........		762mW
28-Pin QSOP (derate 8.00mW/°C above +70°C)		.........667mW
Operating Temperature Ranges
MAX1091_C_ _/MAX1093_C_ _...........................		0°C to +70°C
MAX1091_E_ _/MAX1093_E_ _ ........................	-40°C to +85°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

(VDD = VLOGIC = +2.7V to +3.6V, COM = GND, REFADJ = VDD, VREF = +2.5V, 4.7µF capacitor at REF pin, fCLK = 4.8MHz (50% duty cycle), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER	SYMBOL	CONDITIONS		MIN	TYP	MAX	UNITS
DC ACCURACY (Note 1)
Resolution	RES			10			Bits
Relative Accuracy (Note 2)	INL	MAX109_A				±0.5	LSB
		MAX109_B				±1
Differential Nonlinearity	DNL	No missing codes over temperature				±1	LSB
Offset Error						±2	LSB
Gain Error (Note 3)						±2	LSB
Gain Temperature Coefficient					±2.0		ppm/°C
Channel-to-Channel Offset					±0.1		LSB
Matching
DYNAMIC SPECIFICATIONS (fIN(sine wave) = 50kHz, VIN = 2.5Vp-p, 250ksps, external fCLK =				4.8MHz, bipolar input mode)
Signal-to-Noise Plus Distortion	SINAD				60		dB
Total Harmonic Distortion	THD				-72		dB
(including 5th-order harmonic)
Spurious-Free Dynamic Range	SFDR				72		dB
Intermodulation Distortion	IMD	fIN1 = 49kHz, fIN2 = 52kHz			76		dB
Channel-to-Channel Crosstalk		fIN = 125kHz, VIN = 2.5Vp-p (Note 4)			-78		dB
Full-Linear Bandwidth		SINAD > 56dB			250		kHz
Full-Power Bandwidth		-3dB rolloff			3		MHz
CONVERSION RATE
		External clock mode		3.3
Conversion Time (Note 5)	tCONV	External acquisition/internal clock mode		2.5	3.0	3.5	µs
		Internal acquisition/internal clock mode		3.2	3.6	4.1
Track/Hold Acquisition Time	tACQ					625	ns
Aperture Delay		External acquisition or external clock mode			50		ns
Aperture Jitter		External acquisition or external clock mode			<50		ps
		Internal acquisition/internal clock mode			<200
External Clock Frequency	fCLK			0.1		4.8	MHz
Duty Cycle				30		70	%

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250ksps, +3V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface

ELECTRICAL CHARACTERISTICS (continued)

(VDD = VLOGIC = +2.7V to +3.6V, COM = GND, REFADJ = VDD, VREF = +2.5V, 4.7µF capacitor at REF pin, fCLK = 4.8MHz (50% duty cycle), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER		SYMBOL	CONDITIONS	MIN	TYP	MAX	UNITS
ANALOG INPUTS
Analog Input Voltage Range			Unipolar, VCOM = 0	0		VREF
Single-Ended and Differential		VIN					V
			Bipolar, VCOM = VREF/2	-VREF/2		+VREF/2
(Note 6)
Multiplexer Leakage Current			On/off-leakage current, VIN = 0 or VDD		±0.01	±1	µA
Input Capacitance		CIN			12		pF
INTERNAL REFERENCE
REF Output Voltage				2.49	2.5	2.51	V
REF Short-Circuit Current					15		mA
REF Temperature Coefficient		TCREF	TA = 0°C to +70°C		±20		ppm/°C
REFADJ Input Range			For small adjustments		±100		mV
REFADJ High Threshold			To power down the internal reference	VDD - 1.0			V
Load Regulation (Note 7)			0 to 0.5mA output load		0.2	0.5	mV/mA
Capacitive Bypass at REFADJ					0.01	1	µF
Capacitive Bypass at REF				4.7		10	µF
EXTERNAL REFERENCE AT REF
REF Input Voltage Range		VREF		1.0		VDD +	V
						50mV
REF Input Current		IREF	VREF = 2.5V, fSAMPLE = 250ksps		200	300	µA
			Shutdown mode			2
DIGITAL INPUTS AND OUTPUTS
Input High Voltage		VIH	VLOGIC = 2.7V	2.0			V
			VLOGIC = 1.8V	1.5
Input Low Voltage		VIL	VLOGIC = 2.7V			0.8	V
			VLOGIC = 1.8V			0.5
Input Hysteresis		VHYS			200		mV
Input Leakage Current		IIN	VIN = 0 or VDD		±0.1	±1	µA
Input Capacitance		CIN			15		pF
Output Low Voltage		VOL	ISINK = 1.6mA			0.4	V
Output High Voltage		VOH	ISOURCE = 1mA	VLOGIC - 0.5			V
Three-State Leakage Current		ILEAKAGE	CS = VDD		±0.1	±1	µA
Three-State Output Capacitance		COUT	CS = VDD		15		pF

MAX1091/MAX1093

_______________________________________________________________________________________ 3

MAX1091/MAX1093

250ksps, +3V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface

ELECTRICAL CHARACTERISTICS (continued)

(VDD = VLOGIC = +2.7V to +3.6V, COM = GND, REFADJ = VDD, VREF = +2.5V, 4.7µF capacitor at REF pin, fCLK = 4.8MHz (50% duty cycle), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER		SYMBOL	CONDITIONS		MIN	TYP	MAX	UNITS
POWER REQUIREMENTS
Analog Supply Voltage		VDD			2.7		3.6	V
Digital Supply Voltage		VLOGIC			1.8		VDD + 0.3	V
			Operating mode,	Internal reference		2.3	2.6
			fSAMPLE = 250ksps	External reference		1.9	2.3	mA
Positive Supply Current		IDD	Standby mode	Internal reference		0.9	1.2
				External reference		0.5	0.8
			Shutdown mode			2	10	µA
VLOGIC Current		ILOGIC	CL = 20pF	fSAMPLE = 250ksps			150	µA
				Not converting		2	10
Power-Supply Rejection		PSR	VDD = 3V ±10%, full-scale input			±0.4	±0.7	mV

TIMING CHARACTERISTICS

(VDD = VLOGIC = +2.7V to +3.6V, COM = GND, REFADJ = VDD, VREF = +2.5V, 4.7µF capacitor at REF pin, fCLK = 4.8MHz (50% duty cycle), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER	SYMBOL	CONDITIONS	MIN	TYP	MAX	UNITS
CLK Period	tCP		208			ns
CLK Pulse Width High	tCH		40			ns
CLK Pulse Width Low	tCL		40			ns
Data Valid to WR Rise Time	tDS		40			ns
WR Rise to Data Valid Hold Time	tDH		0			ns
WR to CLK Fall Setup Time	tCWS		40			ns
CLK Fall to WR Hold Time	tCWH		40			ns
CS to CLK or WR	tCSWS		60			ns
Setup Time
CLK or WR to CS	tCSWH		0			ns
Hold Time
CS Pulse Width	tCS		100			ns
WR Pulse Width (Note 8)	tWR		60			ns
CS Rise to Output Disable	tTC	CLOAD = 20pF, Figure 1	20		100	ns

4 _______________________________________________________________________________________

250ksps, +3V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface

TIMING CHARACTERISTICS (continued)

(VDD = VLOGIC = +2.7V to +3.6V, COM = GND, REFADJ = VDD, VREF = +2.5V, 4.7µF capacitor at REF pin, fCLK = 4.8MHz (50% duty cycle), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER		SYMBOL		CONDITIONS	MIN	TYP	MAX	UNITS
					20		70
RD Rise to Output Disable		tTR		CLOAD = 20pF, Figure 1				ns
RD Fall to Output Data Valid		tDO		CLOAD = 20pF, Figure 1	20		70	ns
HBEN to Output Data Valid		tDO1		CLOAD = 20pF, Figure 1	20		110	ns
RD Fall to INT High Delay		tINT1		CLOAD = 20pF, Figure 1			100	ns
CS Fall to Output Data Valid		tDO2		CLOAD = 20pF, Figure 1			110	ns

Note 1: Tested at VDD = +3V, COM = GND, unipolar single-ended input mode.

Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after offset and gain errors have been removed.

Note 3: Offset nulled.

Note 4: On channel is grounded; sine wave applied to off channels.

Note 5: Conversion time is defined as the number of clock cycles times the clock period; clock has 50% duty cycle. Note 6: Input voltage range referenced to negative input. The absolute range for the analog inputs is from GND to VDD. Note 7: External load should not change during conversion for specified accuracy.

Note 8: When bit 5 is set low for internal acquisition, WR must not return low until after the first falling clock edge of the conversion.

MAX1091/MAX1093

VLOGIC

3k

DOUT

CLOAD

DOUT

3k

CLOAD

20pF

20pF

a) HIGH-Z TO VOH AND VOL TO VOH

b) HIGH-Z TO VOL AND VOH TO VOL

Figure 1. Load Circuits for Enable/Disable Times

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MAX1091/MAX1093

250ksps, +3V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface

Typical Operating Characteristics

(VDD = VLOGIC = +3V, VREF = +2.500V, fCLK = 4.8MHz, CL = 20pF, TA = +25°C, unless otherwise noted.)

			INTEGRAL NONLINEARITY													DIFFERENTIAL NONLINEARITY																									SUPPLY CURRENT
	0.4			vs. OUTPUT CODE											0.25			vs. OUTPUT CODE																			vs. SAMPLE FREQUENCY
													TOC01MAX1091/93														TOC02MAX1091/93	10,000																																						MAX1291/93toc03
	0.2														0.20
	0.3
															0.15													1000
															0.10																						WITH INTERNAL
	0.1																																				REFERENCE
(LSB)														(LSB)	0.05													( A)
	0														0														100
INL														INL														DD
	-0.1														-0.5													I
															-0.10																																						WITH EXTERNAL
	-0.2																												10																								REFERENCE
															-0.15
	-0.3														-0.20
	-0.4														-0.25														1
	0	200		400		600		800		1000		1200			0	200		400		600		800		1000		1200			0.1			1			10								100							1k					10k					100k					1M
					OUTPUT CODE														OUTPUT CODE																									fSAMPLE (Hz)

SUPPLY CURRENT vs. SUPPLY VOLTAGE

	2.10								toc04
					RL = ∞
	2.05				CODE = 1010100000				MAX1291/93
(mA)	2.00
	1.95
DD
I
	1.90
	1.85
	1.80
	2.7		3.0		3.3		3.6

VDD (V)

	STANDBY CURRENT vs. TEMPERATURE
	930											MAX1291/3 toc07
( A)	920
	910
DD
I
STANDBY	900
	890
	880
	-40		-15		10		35		60		85

TEMPERATURE (°C)

		SUPPLY CURRENT vs. TEMPERATURE															STANDBY CURRENT vs. SUPPLY VOLTAGE
	2.2														toc05		930														toc06
									RL = ∞
	2.1																920
									CODE = 1010100000						MAX1291/3																MAX1291/3
	2.0															A)
(mA)																(	910
																I
I																DD
	1.9															STANDBY
DD																	900
	1.8
																	890
	1.7
	1.6																880
	-40		-15		10			35				60		85			2.7					3.0			3.3					3.6
					TEMPERATURE (°C)																				VDD (V)
			POWER-DOWN CURRENT																	POWER-DOWN CURRENT
				vs. SUPPLY VOLTAGE																		vs. TEMPERATURE
	1.50														MAX1291/3 toc08		1.2														MAX1291/3 toc09
( A)	1.25															( A)	1.1
DD																DD
I																I
DOWN-POWER	1.00															DOWN-POWER	1.0
	0.75																0.9
	0.50																0.8
	2.7				3.0			3.3						3.6			-40			-15		10			35			60		85
								VDD (V)														TEMPERATURE (°C)

6 _______________________________________________________________________________________