MAXIM MAX1020, MAX1023, MAX1057, MAX1058 Technical data

	KIT
19-3280; Rev 2; 8/04	EVALUATION
	AVAILABLE

10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

General Description

The MAX1020–MAX1023/MAX1057/MAX1058 integrate a multichannel, 10-bit, analog-to-digital converter (ADC) and an octal, 10-bit, digital-to-analog converter (DAC) in a single IC. These devices also include a temperature sensor and configurable general-purpose I/O ports (GPIOs) with a 25MHz SPI™-/QSPI™-/MICROWIRE™-compatible serial interface. The ADC is available in 8/12/16 inputchannel versions. The octal DAC outputs settle within 2.0µs, and the ADC has a 300ksps conversion rate.

All devices include an internal reference (2.5V or 4.096V) providing a well-regulated, low-noise reference for both the ADC and DAC. Programmable reference modes for the ADC and the DAC allow the use of an internal reference, an external reference, or a combination of both. Features such as an internal ±1°C accurate temperature sensor, FIFO, scan modes, programmable internal or external clock modes, data averaging, and AutoShutdown™ allow users to minimize both power consumption and processor requirements. The low glitch energy (4nV•s) and low digital feedthrough (0.5nV•s) of the integrated octal DACs make these devices ideal for digital control of fast-response closed-loop systems.

The devices are guaranteed to operate with a supply voltage from +2.7V to +3.6V (MAX1021/MAX1023/MAX1057) and from +4.75V to +5.25V (MAX1020/MAX1022/ MAX1058). The devices consume 2.5mA at 300ksps throughput, only 22µA at 1ksps throughput, and under 0.2µA in the shutdown mode. The MAX1057/MAX1058 feature 12 GPIOs, while the MAX1020/MAX1021 offer 4 GPIOs that can be configured as inputs or outputs.

The MAX1057/MAX1058 are available in 48-pin thin QFN packages. The MAX1020–MAX1023 are available in 36pin thin QFN packages. All devices are specified over the -40°C to +85°C temperature range.

Applications

Controls for Optical Components

Base-Station Control Loops

System Supervision and Control

Data-Acquisition Systems

Features

♦ 10-Bit, 300ksps ADC

Analog Multiplexer with True-Differential Track/Hold (T/H)

16 Single-Ended Channels or 8 Differential Channels (Unipolar or Bipolar)

12 Single-Ended Channels or 6 Differential Channels (Unipolar or Bipolar)

8 Single-Ended Channels or 4 Differential Channels (Unipolar or Bipolar)

Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB DNL

♦10-Bit, Octal, 2µs Settling DAC Ultra-Low Glitch Energy (4nV•s)

Power-Up Options from Zero Scale or Full Scale Excellent Accuracy: ±1 LSB INL

♦Internal Reference or External Single-Ended/ Differential Reference

Internal Reference Voltage 2.5V or 4.096V

♦Internal ±1°C Accurate Temperature Sensor

♦On-Chip FIFO Capable of Storing 16 ADC Conversion Results and One Temperature Result

♦On-Chip Channel-Scan Mode and Internal Data-Averaging Features

♦Analog Single-Supply Operation

+2.7V to +3.6V or +4.75V to +5.25V

♦25MHz, SPI/QSPI/MICROWIRE Serial Interface

♦AutoShutdown Between Conversions

♦Low-Power ADC

2.5mA at 300ksps 22µA at 1ksps 0.2µA at Shutdown

♦Low-Power DAC: 1.5µA

♦Evaluation Kit Available (Order MAX1258EVKIT)

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp. AutoShutdown is a trademark of Maxim Integrated Products, Inc.

Ordering Information/Selector Guide

				REF	ANALOG	RESOLUTION	ADC	DAC
	PART	TEMP RANGE	PIN-PACKAGE	VOLTAGE	SUPPLY				GPIOs
						BITS***	CHANNELS	CHANNELS
				(V)	VOLTAGE (V)
	MAX1020BETX	-40°C to +85°C	36 Thin QFN-EP**	4.096	4.75 to 5.25	10	8	8	4
	MAX1021BETX*	-40°C to +85°C	36 Thin QFN-EP**	2.5	2.7 to 3.6	10	8	8	4
	MAX1022BETX*	-40°C to +85°C	36 Thin QFN-EP**	4.096	4.75 to 5.25	10	12	8	0
	MAX1023BETX*	-40°C to +85°C	36 Thin QFN-EP**	2.5	2.7 to 3.6	10	12	8	0
	MAX1057BETM	-40°C to +85°C	48 Thin QFN-EP**	2.5	2.7 to 3.6	10	16	8	12
	MAX1058BETM	-40°C to +85°C	48 Thin QFN-EP**	4.096	4.75 to 5.25	10	16	8	12

*Future product—contact factory for availability.

**EP = Exposed pad. Pin Configurations appear at end of data sheet.

***Number of resolution bits refers to both DAC and ADC.

________________________________________________________________ Maxim Integrated Products 1

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.

MAX1023/MAX1057/MAX1058–MAX1020

MAX1020–MAX1023/MAX1057/MAX1058

10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

ABSOLUTE MAXIMUM RATINGS

AVDD to AGND .........................................................	-0.3V to +6V
DGND to AGND.....................................................	-0.3V to +0.3V
DVDD to AVDD .......................................................	-3.0V to +0.3V
Digital Inputs to DGND.............................................	-0.3V to +6V
Digital Outputs to DGND .........................	-0.3V to (DVDD + 0.3V)
Analog Inputs, Analog Outputs and REF_
to AGND...............................................	-0.3V to (AVDD + 0.3V)

Maximum Current into Any Pin (except AGND, DGND, AVDD,

DVDD, and OUT_) ...........................................................	50mA
Maximum Current into OUT_.............................................	100mA

Continuous Power Dissipation (TA = +70°C)

36-Pin Thin QFN (6mm x 6mm)
(derate 26.3mW/°C above +70°C)	......................2105.3mW
48-Pin Thin QFN (7mm x 7mm)
(derate 26.3mW/°C above +70°C)......................	2105.3mW
Operating Temperature Range ...........................	- 40°C to +85°C
Storage Temperature Range .............................	- 60°C to +150°C
Junction Temperature ......................................................	+150°C
Lead Temperature (soldering, 10s) .................................	+300°C

Note: If the package power dissipation is not exceeded, one output at a time may be shorted to AVDD, DVDD, AGND, or DGND indefinitely

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

(AVDD = DVDD = 2.7V to 3.6V (MAX1021/MAX1023/MAX1057), external reference VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 4.75V to 5.25V (MAX1020/MAX1022/MAX1058), external reference VREF = 4.096V (MAX1020/MAX1022/MAX1058), fSCLK = 4.8MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), TA = +25°C. Outputs are unloaded, unless otherwise noted.)

PARAMETER	SYMBOL	CONDITIONS	MIN	TYP	MAX	UNITS
		ADC
DC ACCURACY (Note 1)
Resolution			10			Bits
Integral Nonlinearity	INL			±0.5	±1.0	LSB
Differential Nonlinearity	DNL			±0.5	±1.0	LSB
Offset Error				±0.25	±2.0	LSB
Gain Error		(Note 2)		±0.025	±2.0	LSB
Gain Temperature Coefficient				±1.4		ppm/°C
Channel-to-Channel Offset				±0.1		LSB
DYNAMIC SPECIFICATIONS (10kHz sine wave input, VIN = 2.5VP-P (MAX1021/MAX1023/MAX1057), VIN = 4.096VP-P
(MAX1020/MAX1022/MAX1058), 300ksps, fSCLK = 4.8MHz)
Signal-to-Noise Plus Distortion	SINAD			61		dB
Total Harmonic Distortion	THD			-70		dBc
(Up to the Fifth Harmonic)
Spurious-Free Dynamic Range	SFDR			66		dBc
Intermodulation Distortion	IMD	fin1 = 9.9kHz, fin2 = 10.2kHz		72		dBc
Full-Linear Bandwidth		SINAD > 70dB		100		kHz
Full-Power Bandwidth		-3dB point		1		MHz
CONVERSION RATE (Note 3)
		External reference		0.8		µs
Power-Up Time	tPU					Conversion
		Internal reference (Note 4)		218		Clock
						Cycles

2 _______________________________________________________________________________________

10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

ELECTRICAL CHARACTERISTICS (continued)

(AVDD = DVDD = 2.7V to 3.6V (MAX1021/MAX1023/MAX1057), external reference VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 4.75V to 5.25V (MAX1020/MAX1022/MAX1058), external reference VREF = 4.096V (MAX1020/MAX1022/MAX1058), fSCLK = 4.8MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), TA = +25°C. Outputs are unloaded, unless otherwise noted.)

PARAMETER		SYMBOL	CONDITIONS	MIN	TYP	MAX	UNITS
Acquisition Time		tACQ	(Note 5)	0.6			µs
Conversion Time		tCONV	Internally clocked		3.5		µs
			Externally clocked	2.7
Internal Clock Frequency			Internally clocked conversion		4.3		MHz
External Clock Frequency		fCLK	Externally clocked conversion (Note 5)	0.1		4.8	MHz
Duty Cycle				40		60	%
Aperture Delay					30		ns
Aperture Jitter					<50		ps
ANALOG INPUTS
Input Voltage Range (Note 6)			Unipolar	0		VREF	V
			Bipolar	-VREF / 2		VREF / 2
Input Leakage Current					±0.01	±1	µA
Input Capacitance					24		pF
INTERNAL TEMPERATURE SENSOR
Measurement Error (Notes 5, 7)			TA = +25°C		±0.7		°C
			TA = TMIN to TMAX		±1.0	±3.0
Temperature Resolution					1/8		°C/LSB
INTERNAL REFERENCE
REF1 Output Voltage (Note 8)			MAX1021/MAX1023/MAX1057	2.482	2.50	2.518	V
			MAX1020/MAX1022/MAX1058	4.066	4.096	4.126
REF1 Voltage Temperature		TCREF			±30		ppm/°C
Coefficient
REF1 Output Impedance					6.5		kΩ
REF1 Short-Circuit Current			VREF = 2.5V		0.39		mA
			VREF = 4.096V		0.63
EXTERNAL REFERENCE
REF1 Input Voltage Range		VREF1	REF mode 11 (Note 4)	1		AVDD +	V
						0.05
REF2 Input Voltage Range			REF mode 01	1		AVDD +
		VREF2				0.05	V
(Note 4)
			REF mode 11	0		1

MAX1023/MAX1057/MAX1058–MAX1020

_______________________________________________________________________________________ 3

MAX1020–MAX1023/MAX1057/MAX1058

10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

ELECTRICAL CHARACTERISTICS (continued)

(AVDD = DVDD = 2.7V to 3.6V (MAX1021/MAX1023/MAX1057), external reference VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 4.75V to 5.25V (MAX1020/MAX1022/MAX1058), external reference VREF = 4.096V (MAX1020/MAX1022/MAX1058), fSCLK = 4.8MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), TA = +25°C. Outputs are unloaded, unless otherwise noted.)

PARAMETER	SYMBOL	CONDITIONS	MIN	TYP	MAX	UNITS
		VREF = 2.5V
		(MAX1021/MAX1023/MAX1057),		25	80
		fSAMPLE = 300ksps
REF1 Input Current (Note 9)	IREF1	VREF = 4.096V				µA
		(MAX1020/MAX1022/MAX1058),		40	80
		fSAMPLE = 300ksps
		Acquisition between conversions		±0.01	±1
		VREF = 2.5V
		(MAX1021/MAX1023/MAX1057),		25	80
		fSAMPLE = 300ksps
REF2 Input Current	IREF2	VREF = 4.096V				µA
		(MAX1020/MAX1022/MAX1058),		40	80
		fSAMPLE = 300ksps
		Acquisition between conversions		±0.01	±1
		DAC
DC ACCURACY (Note 10)
Resolution			10			Bits
Integral Nonlinearity	INL			±0.5	±1	LSB
Differential Nonlinearity	DNL	Guaranteed monotonic			±0.5	LSB
Offset Error	VOS	(Note 8)		±3	±10	mV
Offset-Error Drift				±10		ppm of
						FS/°C
Gain Error	GE	(Note 8)		±1.25	±10	LSB
Gain Temperature Coefficient				±8		ppm of
						FS/°C
DAC OUTPUT
		No load	0.02		AVDD -
					0.02
Output-Voltage Range						V
		10kΩ load to either rail	0.1		AVDD -
					0.1
DC Output Impedance				0.5		Ω
Capacitive Load		(Note 11)			1	nF
		AVDD = 2.7V, VREF = 2.5V
		(MAX1021/MAX1023/MAX1057),	2000
Resistive Load to AGND	RL	gain error < 1%				Ω
		AVDD = 4.75V, VREF = 4.096V
		(MAX1020/MAX1022/MAX1058),	500
		gain error < 2%

4 _______________________________________________________________________________________

10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

ELECTRICAL CHARACTERISTICS (continued)

(AVDD = DVDD = 2.7V to 3.6V (MAX1021/MAX1023/MAX1057), external reference VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 4.75V to 5.25V (MAX1020/MAX1022/MAX1058), external reference VREF = 4.096V (MAX1020/MAX1022/MAX1058), fSCLK = 4.8MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), TA = +25°C. Outputs are unloaded, unless otherwise noted.)

PARAMETER			SYMBOL	CONDITIONS	MIN	TYP	MAX	UNITS
Wake-Up Time (Note 12)				From power-down mode, AVDD = 5V		25		µs
				From power-down mode, AVDD = 2.7V		21
1kΩ Output Termination				Programmed in power-down mode		1		kΩ
100kΩ Output Termination				At wake-up or programmed in		100		kΩ
				power-down mode
DYNAMIC PERFORMANCE (Notes 5, 13)
Output-Voltage Slew Rate			SR	Positive and negative	3			V/µs
Output-Voltage Settling Time			tS	To 1 LSB, 400 - C00 hex (Note 7)		2	5	µs
Digital Feedthrough				Code 0, all digital inputs from 0 to DVDD		0.5		nV•s
Major Code Transition Glitch				Between codes 2047 and 2048		4		nV•s
Impulse
Output Noise (0.1Hz to 50MHz)				From VREF		660		µVP-P
				Using internal reference		720
Output Noise (0.1Hz to 500kHz)				From VREF		260		µVP-P
				Using internal reference		320
DAC-to-DAC Transition						0.5		nV•s
Crosstalk
INTERNAL REFERENCE
REF1 Output Voltage (Note 8)				MAX1021/MAX1023/MAX1057	2.482	2.50	2.518	V
				MAX1020/MAX1022/MAX1058	4.066	4.096	4.126
REF1 Temperature Coefficient			TCREF			±30		ppm/°C
REF1 Short-Circuit Current				VREF = 2.5V		0.39		mA
				VREF = 4.096V		0.63
EXTERNAL-REFERENCE INPUT
REF1 Input Voltage Range			VREF1	REF modes 01, 10, and 11 (Note 4)	0.7		AVDD	V
REF1 Input Impedance			RREF1		70	100	130	kΩ
				DIGITAL INTERFACE
DIGITAL INPUTS (SCLK, DIN, CS, CNVST, LDAC)
Input-Voltage High			VIH	DVDD = 2.7V to 5.25V	2.4			V
Input-Voltage Low			VIL	DVDD = 3.6V to 5.25V			0.8	V
				DVDD = 2.7V to 3.6V			0.6
Input Leakage Current			IL			±0.01	±10	µA
Input Capacitance			CIN			15		pF
DIGITAL OUTPUT (DOUT) (Note 14)
Output-Voltage Low			VOL	ISINK = 2mA			0.4	V

MAX1023/MAX1057/MAX1058–MAX1020

_______________________________________________________________________________________ 5

MAX1020–MAX1023/MAX1057/MAX1058

10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

ELECTRICAL CHARACTERISTICS (continued)

(AVDD = DVDD = 2.7V to 3.6V (MAX1021/MAX1023/MAX1057), external reference VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 4.75V to 5.25V (MAX1020/MAX1022/MAX1058), external reference VREF = 4.096V (MAX1020/MAX1022/MAX1058), fSCLK = 4.8MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), TA = +25°C. Outputs are unloaded, unless otherwise noted.)

PARAMETER	SYMBOL		CONDITIONS		MIN	TYP	MAX	UNITS
Output-Voltage High	VOH	ISOURCE = 2mA			DVDD -			V
					0.5
Tri-State Leakage Current							±10	µA
Tri-State Output Capacitance	COUT					15		pF
DIGITAL OUTPUT (EOC) (Note 14)
Output-Voltage Low	VOL	ISINK = 2mA					0.4	V
Output-Voltage High	VOH	ISOURCE = 2mA			DVDD -			V
					0.5
Tri-State Leakage Current							±10	µA
Tri-State Output Capacitance	COUT					15		pF
DIGITAL OUTPUTS (GPIO_) (Note 14)
GPIOB_, GPIOC_ Output-		ISINK = 2mA					0.4	V
Voltage Low		ISINK = 4mA					0.8
GPIOB_, GPIOC_ Output-		ISOURCE = 2mA			DVDD -			V
Voltage High					0.5
GPIOA_ Output-Voltage Low		ISINK = 15mA					0.8	V
GPIOA_ Output-Voltage High		ISOURCE = 15mA			DVDD -			V
					0.8
Tri-State Leakage Current							±10	µA
Tri-State Output Capacitance	COUT					15		pF
POWER REQUIREMENTS (Note 15)
Digital Positive-Supply Voltage	DVDD				2.70		AVDD	V
Digital Positive-Supply Current	DIDD	Idle, all blocks shut down				0.2	4	µA
		Only ADC on, external reference				1		mA
Analog Positive-Supply Voltage	AVDD	MAX1021/MAX1023/MAX1057			2.7		3.6	V
		MAX1020/MAX1022/MAX1058			4.75		5.25
		Idle, all blocks shut down				0.2	1	µA
Analog Positive Supply Current	AIDD	Only ADC on,		fSAMPLE = 300ksps		2.8	4.2
		external reference		fSAMPLE = 100ksps		2.6		mA
		All DACs on, no load, internal reference				1.5	4.0
		AVDD = 2.7V				-77
		MAX1021/MAX1023/MAX1057
REF1 Positive-Supply Rejection	PSRR							dB
		AVDD = 4.75V				-80
		MAX1020/MAX1022/MAX1058
		Output	MAX1021/MAX1023/MAX1057			±0.1	±0.5
			AVDD = 2.7V to 3.6V
DAC Positive-Supply Rejection	PSRD	code =						mV
			MAX1020/MAX1022/MAX1058
		FFFhex				±0.1	±0.5
			AVDD = 4.75V to 5.25V

6 _______________________________________________________________________________________

10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

ELECTRICAL CHARACTERISTICS (continued)

(AVDD = DVDD = 2.7V to 3.6V (MAX1021/MAX1023/MAX1057), external reference VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 4.75V to 5.25V (MAX1020/MAX1022/MAX1058), external reference VREF = 4.096V (MAX1020/MAX1022/MAX1058), fSCLK = 4.8MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), TA = +25°C. Outputs are unloaded, unless otherwise noted.)

PARAMETER	SYMBOL		CONDITIONS	MIN	TYP	MAX	UNITS
		Full-	MAX1021/MAX1023/		±0.06	±0.5
			MAX1057 AVDD = 2.7V to 3.6V
ADC Positive-Supply Rejection	PSRA	scale					mV
			MAX1020/MAX1022/
		input			±0.06	±0.5
			MAX1058 AVDD = 4.75V to 5.25V
TIMING CHARACTERISTICS (Figures 6–13)
SCLK Clock Period	tCP			40			ns
SCLK Pulse-Width High	tCH	40/60 duty cycle		16			ns
SCLK Pulse-Width Low	tCL	60/40 duty cycle		16			ns
GPIO Output Rise/Fall After	tGOD	CLOAD = 20pF				100	ns
CS Rise
GPIO Input Setup Before CS Fall	tGSU			0			ns
LDAC Pulse Width	tLDACPWL			20			ns
SCLK Fall to DOUT Transition	tDOT	CLOAD = 20pF, SLOW = 0		1.8		12.0	ns
(Note 16)		CLOAD = 20pF, SLOW = 1		10		40
SCLK Rise to DOUT Transition	tDOT	CLOAD = 20pF, SLOW = 0		1.8		12.0	ns
(Notes 16, 17)		CLOAD = 20pF, SLOW = 1		10		40
CS Fall to SCLK Fall Setup Time	tCSS			10			ns
SCLK Fall to CSRise Setup Time	tCSH			0			ns
DIN to SCLK Fall Setup Time	tDS			10			ns
DIN to SCLK Fall Hold Time	tDH			0			ns
CS Pulse-Width High	tCSPWH			50			ns
CS Rise to DOUT Disable	tDOD	CLOAD = 20pF				25	ns
CS Fall to DOUT Enable	tDOE	CLOAD = 20pF		1.5		25.0	ns
EOC Fall to CS Fall	tRDS			30			ns
		CKSEL = 01 (temp sense) or CKSEL =				55
		10 (temp sense), internal reference on
		CKSEL = 01 (temp sense) or CKSEL =
		10 (temp sense), internal reference				120
CS or CNVST Rise to EOC Fall	tDOV	initially off					µs
		CKSEL = 01 (voltage conversion)				8
		CKSEL = 10 (voltage conversion),				8
		internal reference on
		CKSEL = 10 (voltage conversion),				80
		internal reference initially off
CNVST Pulse Width	tCSW	CKSEL = 00, CKSEL = 01 (temp sense)		40			ns
		CKSEL = 01 (voltage conversion)		1.4			µs

MAX1023/MAX1057/MAX1058–MAX1020

_______________________________________________________________________________________ 7

MAX1020–MAX1023/MAX1057/MAX1058

10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

ELECTRICAL CHARACTERISTICS (continued)

(AVDD = DVDD = 2.7V to 3.6V (MAX1021/MAX1023/MAX1057), external reference VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 4.75V to 5.25V (MAX1020/MAX1022/MAX1058), external reference VREF = 4.096V (MAX1020/MAX1022/MAX1058), fSCLK = 4.8MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), TA = +25°C. Outputs are unloaded, unless otherwise noted.)

Note 1: Tested at DVDD = AVDD = +3.6V (MAX1021/MAX1023/MAX1057), DVDD = AVDD = +5.25V (MAX1020/MAX1022/MAX1058). Note 2: Offset nulled.

Note 3: No bus activity during conversion. Conversion time is defined as the number of conversion clock cycles multiplied by the clock period.

Note 4: See Table 5 for reference-mode details.

Note 5: Not production tested. Guaranteed by design.

Note 6: See the ADC/DAC References section.

Note 7: Fast automated test, excludes self-heating effects. Note 8: Specified over the -40°C to +85°C temperature range. Note 9: REFSEL[1:0] = 00 or when DACs are not powered up.

Note 10: DAC linearity, gain, and offset measurements are made between codes 115 and 3981. Note 11: The DAC buffers are guaranteed by design to be stable with a 500pF load.

Note 12: Time required by the DAC output to power up and settle within 1 LSB in the external reference mode. Note 13: All DAC dynamic specifications are valid for a load of 1nF and 10kΩ.

Note 14: Only one digital output (either DOUT, EOC, or the GPIOs) can be indefinitely shorted to either supply at one time. Note 15: All digital inputs at either DVDD or DGND. DVDD should not exceed AVDD.

Note 16: See the Reset Register section and Table 9 for details on programming the SLOW bit. Note 17: Clock mode 11 only.

Typical Operating Characteristics

(AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057), external VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), external VREF = 4.096V (MAX1020/MAX1022/MAX1058), fCLK = 4.8MHz (50% duty cycle), fSAMPLE = 300ksps, CLOAD = 50pF, 0.1µF capacitor at REF, TA = +25°C, unless otherwise noted.)

SHUTDOWN CURRENT ( A)

SHUTDOWN CURRENT

vs. ANALOG SUPPLY VOLTAGE

0.30

0.25

0.20

0.15

0.10

0.05

MAX1020/MAX1022/MAX1058 0

4.75

4.85

4.95

5.05

5.15

SUPPLY VOLTAGE (V)

			SHUTDOWN CURRENT
			vs. ANALOG SUPPLY VOLTAGE
MAX1020 toc01		0.20			MAX1020 toc02	0.6
	A)(	0.18				A)
	SHUTDOWNCURRENT					0.5
						SHUTDOWNCURRENT (
		0.16				0.4
						0.3
		0.14
						0.2
		0.12				0.1
		MAX1021/MAX1023/MAX1057
		0.10				0
5.25		2.7	3.0	3.3	3.6
			SUPPLY VOLTAGE (V)

SHUTDOWN CURRENT vs. TEMPERATURE

					MAX1020 toc03
-40	-15	10	35	60	85

TEMPERATURE (°C)

8 _______________________________________________________________________________________

10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

Typical Operating Characteristics (continued)

(AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057), external VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), external VREF = 4.096V (MAX1020/MAX1022/MAX1058), fCLK = 4.8MHz (50% duty cycle), fSAMPLE = 300ksps, CLOAD = 50pF, 0.1µF capacitor at REF, TA = +25°C, unless otherwise noted.)

INTERNAL OSCILLATOR FREQUENCY	INTERNAL OSCILLATOR FREQUENCY	INTERNAL OSCILLATOR FREQUENCY
vs. ANALOG SUPPLY VOLTAGE	vs. ANALOG SUPPLY VOLTAGE	vs. TEMPERATURE

FREQUENCY (MHz)	4.5					MAX1020 toc04		4.90
	4.4						FREQUENCY (MHz)	4.85
	4.3							4.80
OSCILLATOR							OSCILLATOR	4.75
	4.2
								4.70
INTERNAL	4.1						INTERNAL	4.65
	MAX1020/MAX1022/MAX1058
	4.0							4.60
	4.75	4.85	4.95	5.05	5.15	5.25

SUPPLY VOLTAGE (V)

MAX1020 toc05		5.0
	FREQUENCY (MHz)	4.8
		4.6
	OSCILLATOR	4.4
		4.2
	INTERNAL	4.0
MAX1021/MAX1023/MAX1057
		3.8

2.7	3.0	3.3	3.6
	SUPPLY VOLTAGE (V)

					MAX1020 toc06
	MAX1021/MAX1023/MAX1057
	MAX1020/MAX1022/MAX1058
-40	-15	10	35	60	85

TEMPERATURE (°C)

ADC INTEGRAL NONLINEARITY	ADC INTEGRAL NONLINEARITY	ADC DIFFERENTIAL NONLINEARITY
vs. OUTPUT CODE	vs. OUTPUT CODE	vs. OUTPUT CODE

	0.3				toc07		0.3					toc08		0.3					toc09
NONLINEARITYINTEGRAL (LSB)						NONLINEARITYINTEGRAL (LSB)							NONLINEARITYDIFFERENTIAL(LSB)
	-0.2				MAX1020		-0.2					MAX1020		-0.2					MAX1020
	0.2						0.2							0.2
	0.1						0.1							0.1
	0						0							0
	-0.1						-0.1							-0.1
	-0.3	MAX1020/MAX1022/MAX1058					-0.3		MAX1021/MAX1023/MAX1057					-0.3		MAX1020/MAX1022/MAX1058
		256	512	768				0	256	512	768	1024				256	512	768
	0				1024										0				1024
			OUTPUT CODE							OUTPUT CODE							OUTPUT CODE

ADC DIFFERENTIAL NONLINEARITY	ADC OFFSET ERROR	ADC OFFSET ERROR
vs. OUTPUT CODE	vs. ANALOG SUPPLY VOLTAGE	vs. ANALOG SUPPLY VOLTAGE

DIFFERENTIAL NONLINEARITY (LSB)

0.3									MAX1020 toc10
0.2
0.1
0
-0.1
-0.2
-0.3		MAX1021/MAX1023/MAX1057
0		256		512		768		1024

OUTPUT CODE

	-0.4					MAX1020 toc11	0
ERROR (LSB)	-0.5					ERROR (LSB)	-0.5
	-0.6						-1.0
OFFSET	-0.7					OFFSET
							-1.5
	MAX1020/MAX1022/MAX1058
	-0.8						-2.0
	4.75	4.85	4.95	5.05	5.15	5.25

SUPPLY VOLTAGE (V)

			MAX1020 toc12
	MAX1021/MAX1023/MAX1057
2.7	3.0	3.3	3.6
	SUPPLY VOLTAGE (V)

MAX1023/MAX1057/MAX1058–MAX1020

_______________________________________________________________________________________ 9

MAX1020–MAX1023/MAX1057/MAX1058

10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

Typical Operating Characteristics (continued)

(AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057), external VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), external VREF = 4.096V (MAX1020/MAX1022/MAX1058), fCLK = 4.8MHz (50% duty cycle), fSAMPLE = 300ksps, CLOAD = 50pF, 0.1µF capacitor at REF, TA = +25°C, unless otherwise noted.)

ADC OFFSET ERROR	ADC GAIN ERROR	ADC GAIN ERROR
vs. TEMPERATURE	vs. ANALOG SUPPLY VOLTAGE	vs. ANALOG SUPPLY VOLTAGE

0					toc13		0.050
	MAX1020/MAX1022/MAX1058				MAX1020
							0.025
-0.5
							0
-1.0
OFFSETERROR(LSB)						GAINERROR(LSB)	-0.025
		MAX1021/MAX1023/MAX1057
-1.5
							-0.050
-2.0							-0.075
-40	-15	10	35	60	85
		TEMPERATURE (°C)

					MAX1020 toc14		0.50			MAX1020 toc15
							0.45
						(LSB)	0.40
						GAIN ERROR	0.35
							0.30
							0.25
MAX1020/MAX1022/MAX1058							0.20	MAX1021/MAX1023/MAX1057
4.75	4.85	4.95	5.05	5.15	5.25		2.7	3.0	3.3	3.6
		SUPPLY VOLTAGE (V)						SUPPLY VOLTAGE (V)

ADC GAIN ERROR vs. TEMPERATURE

	1.00					MAX1020 toc16
	0.75
(LSB)	0.50
ERROR	0.25
GAIN	MAX1021/MAX1023/MAX1057
	0
	-0.25		MAX1020/MAX1022/MAX1058
	-0.50	-15	10	35	60
	-40					85
			TEMPERATURE (°C)

ADC EXTERNAL REFERENCE

INPUT CURRENT vs. SAMPLING RATE

( A)	60						toc17		3.0
EXTERNAL REFERENCE INPUT CURRENT	50						MAX1020	ANALOG SUPPLY CURRENT (mA)	2.5
	40	MAX1020/MAX1022/MAX1058							2.0
	30								1.5
	20								1.0
	10								0.5
ADC			MAX1021/MAX1023/MAX1057						0
	0
	0	50	100	150	200	250	300
			SAMPLING RATE (ksps)

ANALOG SUPPLY CURRENT vs. SAMPLING RATE

	MAX1020/MAX1022/MAX1058					MAX1020 toc18
		MAX1021/MAX1023/MAX1057
0	50	100	150	200	250	300
		SAMPLING RATE (ksps)

ANALOG SUPPLY CURRENT	ANALOG SUPPLY CURRENT	ANALOG SUPPLY CURRENT
vs. ANALOG SUPPLY VOLTAGE	vs. ANALOG SUPPLY VOLTAGE	vs. TEMPERATURE

	2.8					MAX1020 toc19		2.6
	2.7							2.5
(mA)	2.6						(mA)	2.4
CURRENT							CURRENT
								2.3
	2.5
								2.2
SUPPLY							SUPPLY
	2.4							2.1
	2.3							2.0
	MAX1020/MAX1022/MAX1058
	2.2							1.9
	4.75	4.85	4.95	5.05	5.15	5.25

SUPPLY VOLTAGE (V)

MAx1020 toc20		2.7
	(mA)	2.6
	CURRENT
	SUPPLY	2.5
	ANALOG	2.4
MAX1021/MAX1023/MAX1057		2.3

2.7	3.0	3.3	3.6
	SUPPLY VOLTAGE (V)

					MAX1020 toc21
MAX1020/MAX1022/MAX1058
-40	-15	10	35	60	85

TEMPERATURE (°C)

10 ______________________________________________________________________________________

10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

Typical Operating Characteristics (continued)

(AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057), external VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), external VREF = 4.096V (MAX1020/MAX1022/MAX1058), fCLK = 4.8MHz (50% duty cycle), fSAMPLE = 300ksps, CLOAD = 50pF, 0.1µF capacitor at REF, TA = +25°C, unless otherwise noted.)

ANALOG SUPPLY CURRENT vs. TEMPERATURE

	2.16					toc22		0.3
ANALOG SUPPLY CURRENT (mA)	2.15					MAX1020	INTEGRAL NONLINEARITY (LSB)	0.2
	2.14							0.1
	2.13							0
	2.12							-0.1
	2.11							-0.2
	MAX1021/MAX1023/MAX1057
	2.10	-15	10	35	60	85		-0.3
	-40

TEMPERATURE (°C)

DAC INTEGRAL NONLINEARITY vs. OUTPUT CODE

				toc23		0.3
				MAX1020	(LSB)	0.2
					NONLINEARITY	0.1
						0
					INTEGRAL	-0.1
						-0.2
	MAX1020/MAX1022/MAX1058					-0.3
0	256	512	768	1024

OUTPUT CODE

DAC INTEGRAL NONLINEARITY vs. OUTPUT CODE

				MAX1020 toc24
	MAX1021/MAX1023/MAX1057
0	256	512	768	1024

OUTPUT CODE

DAC DIFFERENTIAL NONLINEARITY	DAC DIFFERENTIAL NONLINEARITY	DAC FULL-SCALE ERROR
vs. OUTPUT CODE	vs. OUTPUT CODE	vs. ANALOG SUPPLY VOLTAGE

	0.10					MAX1020 toc25		0.10
(LSB)	0.05						(LSB)	0.05
NONLINEARITY							NONLINEARITY
	0							0
DIFFERENTIAL	-0.05						DIFFERENTIAL	-0.05
	MAX1020/MAX1022/MAX1058
	-0.10	1026	1029	1032	1035	1038		-0.10
	1023

					MAX1020 toc26		0.04
						(LSB)	0.03
						ERROR
						FULL-SCALE	0.02
						DAC	0.01
MAX1021/MAX1023/MAX1057
1023	1026	1029	1032	1035	1038		0

					MAX1020 toc27
MAX1020/MAX1022/MAX1058
4.75	4.85	4.95	5.05	5.15	5.25

OUTPUT CODE	OUTPUT CODE	SUPPLY VOLTAGE (V)
DAC FULL-SCALE ERROR	DAC FULL-SCALE ERROR	DAC FULL-SCALE ERROR
vs. ANALOG SUPPLY VOLTAGE	vs. TEMPERATURE	vs. TEMPERATURE

	-0.50	toc28		2.0
(LSB)		MAx1020	(LSB)	1.5
	-0.55
ERROR			ERROR	1.0
FULL-SCALE	-0.60		FULL-SCALE	0.5
				0
DAC	-0.65		DAC
				-0.5
		MAX1021/MAX1023/MAX1057
	-0.70			-1.0

2.7	3.0	3.3	3.6
	SUPPLY VOLTAGE (V)

					toc29		0
		INTERNAL REFERENCE			MAX1020	(LSB)	-0.25
							-0.50
						ERROR	-0.75
						-SCALE	-1.00
							-1.25
						DAC FULL
	EXTERNAL REFERENCE = 4.096V						-1.50
							-1.75
	MAX1020/MAX1022/MAX1058						-2.00
-40	-15	10	35	60	85

					MAX1020 toc30
EXTERNAL REFERENCE = 2.500V
	INTERNAL REFERENCE
	MAX1021/MAX1023/MAX1057
-40	-15	10	35	60	85

TEMPERATURE (°C)

TEMPERATURE (°C)

MAX1023/MAX1057/MAX1058–MAX1020

______________________________________________________________________________________ 11

MAX1020–MAX1023/MAX1057/MAX1058

10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

Typical Operating Characteristics (continued)

(AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057), external VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), external VREF = 4.096V (MAX1020/MAX1022/MAX1058), fCLK = 4.8MHz (50% duty cycle), fSAMPLE = 300ksps, CLOAD = 50pF, 0.1µF capacitor at REF, TA = +25°C, unless otherwise noted.)

DAC FULL-SCALE ERROR vs. REFERENCE VOLTAGE

	1.00					toc31		0
(LSB)	0.75					MAX1020	(LSB)	-0.5
	0.50
ERROR	0.25						ERROR	-1.0
FULL-SCALE	0						FULL-SCALE	-1.5
	-0.25							-2.0
DAC	-0.50						DAC
								-2.5
	-0.75
		MAX1020/MAX1022/MAX1058
	-1.00							-3.0
		1	2	3	4
	0					5

REFERENCE VOLTAGE (V)

DAC FULL-SCALE ERROR vs. REFERENCE VOLTAGE

						toc32		1
						MAX1020	(LSB)	0
							ERROR	-1
							-SCALE	-2
							DAC FULL
								-3
	MAX1021/MAX1023/MAX1057
0	0.5	1.0	1.5	2.0	2.5	3.0		-4

REFERENCE VOLTAGE (V)

DAC FULL-SCALE ERROR vs. LOAD CURRENT

						MAX1020 toc33
	MAX1020/MAX1022/MAX1058
0	5	10	15	20	25	30

LOAD CURRENT (mA)

DAC FULL-SCALE ERROR	INTERNAL REFERENCE VOLTAGE	INTERNAL REFERENCE VOLTAGE
vs. LOAD CURRENT	vs. TEMPERATURE	vs. TEMPERATURE

	1						toc34	4.12
	0						MAX1020	4.11
	-1
								4.10
	-2
	-3							4.09
ERRORSCALE(LSB)FULLDAC-								VOLTAGEREFERENCEINTERNAL(V)
	-4	MAX1021/MAX1023/MAX1057						4.08
		0.5	1.0	1.5	2.0	2.5
	0						3.0

					toc35		2.52
					MAX1020	VOLTAGE (V)	2.51
						REFERENCE	2.50
						INTERNAL	2.49
MAX1020/MAX1022/MAX1058							2.48
-40	-15	10	35	60	85

					MAX1020 toc36
	MAX1021/MAX1023/MAX1057
-40	-15	10	35	60	85

LOAD CURRENT (mA)	TEMPERATURE (°C)	TEMPERATURE (°C)
ADC REFERENCE SUPPLY CURRENT	ADC REFERENCE SUPPLY CURRENT	ADC REFERENCE SUPPLY CURRENT
vs. ANALOG SUPPLY VOLTAGE	vs. ANALOG SUPPLY VOLTAGE	vs. TEMPERATURE

	43.0					MAX1020 toc37		25.8
CURRENT ( A)	42.8						CURRENT ( A)	25.7
	42.6
SUPPLY							SUPPLY
								25.6
REFERENCE	42.4						REFERENCE
	42.2							25.5
ADC							ADC
	MAX1020/MAX1022/MAX1058
	42.0	4.85	4.95	5.05	5.15			25.4
	4.75					5.25

SUPPLY VOLTAGE (V)

	MAX1020 toc38		50
		CURRENT ( A)	48
			46
		SUPPLY
		REFERENCE	44
			42
		ADC
	MAX1021/MAX1023/MAX1057
			40

2.7	3.0	3.3	3.6
	SUPPLY VOLTAGE (V)

					MAX1020 toc39
		MAX1020/MAX1022/MAX1058
-40	-15	10	35	60	85
		TEMPERATURE (°C)

12 ______________________________________________________________________________________

10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

Typical Operating Characteristics (continued)

(AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057), external VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), external VREF = 4.096V (MAX1020/MAX1022/MAX1058), fCLK = 4.8MHz (50% duty cycle), fSAMPLE = 300ksps, CLOAD = 50pF, 0.1µF capacitor at REF, TA = +25°C, unless otherwise noted.)

ADC REFERENCE SUPPLY CURRENT	ADC FFT PLOT	ADC IMD PLOT
vs. TEMPERATURE

	27.00					MAX1020toc40		0		fSAMPLE = 32.768kHz			MAX1020toc41		0			fCLK = 5.24288MHz
(CURRENTSUPPLYREFERENCEA)							(dB)AMPLITUDE							(dB)AMPLITUDE
	26.75							-20		fANALOG_)N = 10.080kHz					-20			fIN1 = 9.0kHz	MAX1020toc42
										fCLK = 5.24288MHz								fIN2 = 11.0kHz
	26.50							-40		SINAD = 61.21dBc					-40			AIN = -6dBFS
										SNR = 61.21dBc								IMD = 78.0dBc
	26.25							-60		THD = 73.32dBc					-60
								-80		SFDR = 81.25dBc					-80
	26.00
	25.75							-100							-100
	25.50							-120							-120
ADC	25.25		MAX1021/MAX1023/MAX1057					-140							-140
	25.00							-160							-160
	-40	-15	10	35	60	85		0	50	100	150	200			0	50	100	150	200
			TEMPERATURE (°C)						ANALOG INPUT FREQUENCY (kHz)							ANALOG INPUT FREQUENCY (kHz)

AMPLITUDE (dB)

0

-20

-40

-60

-80

-100

-120

-140

-160

ADC CROSSTALK PLOT	DAC OUTPUT LOAD REGULATION
	vs. OUTPUT CURRENT

			fIN2	= 8.0801kHz	toc43MAX1020	2.08					toc44MAX1020
			fCLK = 5.24288MHz
			fIN1 = 10.080kHz			2.07
			SNR = 61.11dBc		(V)	2.06
			THD = 73.32dBc
					VOLTAGE
			ENOB = 9.86 BITS			2.05
			SFDR = 86.34dBc
					OUTPUT	2.04
						2.03		SINKING
					DAC	2.02		SOURCING
						2.01	DAC OUTPUT = MIDSCALE
						2.00	MAX1020/MAX1022/MAX1058
	0	50	100	150	200		-30	0	30	60	90

ANALOG INPUT FREQUENCY (kHz)

OUTPUT CURRENT (mA)

DAC OUTPUT LOAD REGULATION vs. OUTPUT CURRENT

		1.29	toc45
		1.28	MAX1020
	(V)
		1.27
	VOLTAGE	1.26
		1.25
	OUTPUT
		1.24	SINKING
	DAC
		1.23	SOURCING

1.22DAC OUTPUT = MIDSCALE

MAX1021/MAX1023/MAX1057

1.21

-30

-20

-10

0

10

20

30

OUTPUT CURRENT (mA)

GPIO OUTPUT VOLTAGE vs. SOURCE CURRENT

	5		MAX1020/MAX1022/MAX1058				toc46		3.0
	4						MAX1020	(V)	2.5
(V)
VOLTAGE				GPIOA0–A3 OUTPUTS				VOLTAGE	2.0
	3
									1.5
OUTPUT								OUTPUT
	2								1.0
GPIO								GPIO
	1			GPIOB0–B3,
				C0–C3 OUTPUTS					0.5
	0								0
	0	20	40	60	80	100

SOURCE CURRENT (mA)

GPIO OUTPUT VOLTAGE vs. SOURCE CURRENT

		MAX1021/MAX1023/MAX1057				toc47
			GPIOA0–A3 OUTPUTS			MAX1020
			GPIOB0–B3, C0–C3
				OUTPUTS
0	20	40	60	80	100

SOURCE CURRENT (mA)

GPIO OUTPUT VOLTAGE vs. SINK CURRENT

	1500			GPIOB0–B3, C0–C3		toc48
						MAX1020
				OUTPUTS
(mV)	1200
VOLTAGE	900
OUTPUT	600
GPIO				GPIOA0–A3 OUTPUTS
	300
	0		MAX1020/MAX1022/MAX1058
	0	20	40	60	80	100

SINK CURRENT (mA)

MAX1023/MAX1057/MAX1058–MAX1020

______________________________________________________________________________________ 13

MAX1020–MAX1023/MAX1057/MAX1058

10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

Typical Operating Characteristics (continued)

(AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057), external VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), external VREF = 4.096V (MAX1020/MAX1022/MAX1058), fCLK = 4.8MHz (50% duty cycle), fSAMPLE = 300ksps, CLOAD = 50pF, 0.1µF capacitor at REF, TA = +25°C, unless otherwise noted.)

GPIO OUTPUT VOLTAGE vs. SINK CURRENT

	1500			GPIOB0–B3, C0–C3			toc49	1.00
							MAX1020	0.75
				OUTPUTS
	1200							0.50
	900							0.25
								0
	600							-0.25
	300			GPIOA0–A3 OUTPUTS				-0.50
(mV)VOLTAGEOUTPUTGPIO								ERRORSENSORTEMPERATUREC)°(
				MAX1021/MAX1023/MAX1057				-0.75
	0							-1.00
		10	20	30	40	50
	0						60

TEMPERATURE SENSOR ERROR	DAC-TO-DAC CROSSTALK
vs. TEMPERATURE	RLOAD = 10kΩ, CLOAD = 100pF

					MAX1020 toc50	MAX1020 toc51
						MAX1021/MAX1023/MAX1057
-40	-15	10	35	60	85	100 s

SINK CURRENT (mA)

TEMPERATURE (°C)

VOUTA

1V/div

VOUTB

10mV/div AC-COUPLED

DAC-TO-DAC CROSSTALK

DYNAMIC RESPONSE RISE TIME

DYNAMIC RESPONSE RISE TIME

RLOAD = 10kΩ, CLOAD = 100pF

RLOAD = 10kΩ, CLOAD = 100pF

RLOAD = 10kΩ, CLOAD = 100pF

MAX1020 toc52

MAX1020 toc53

MAX1020 toc54

MAX1021/MAX1023/MAX1057

VOUTA

CS

2V/div

VOUT

2V/div

1V/div

VOUTB

VOUT

10mV/div

AC-COUPLED

CS

2V/div

1V/div

MAX1020/MAX1022/MAX1058

MAX1020/MAX1022/MAX1058

100 s

1 s

1 s

DYNAMIC RESPONSE FALL TIME

DYNAMIC RESPONSE FALL TIME

MAJOR CARRY TRANSITION

RLOAD = 10kΩ, CLOAD = 100pF

RLOAD = 10kΩ, CLOAD = 100pF

RLOAD = 10kΩ, CLOAD = 100pF

MAX1020 toc55

MAX1020 toc56

MAX1020 toc57

MAX1021/MAX1023/MAX1057

CS

2V/div

VOUT

CS

1V/div

1V/div

VOUT

VOUT

10mV/div

CS

2V/div

AC-COUPLED

1V/div

MAX1021/MAX1023/MAX1057

MAX1020/MAX1022/MAX1058

1 s

1 s

1 s

14 ______________________________________________________________________________________

10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

Typical Operating Characteristics (continued)

(AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057), external VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), external VREF = 4.096V (MAX1020/MAX1022/MAX1058), fCLK = 4.8MHz (50% duty cycle), fSAMPLE = 300ksps, CLOAD = 50pF, 0.1µF capacitor at REF, TA = +25°C, unless otherwise noted.)

MAJOR CARRY TRANSITION

DAC DIGITAL FEEDTHROUGH (RLOAD = 10kΩ,

DAC DIGITAL FEEDTHROUGH (RLOAD = 10kΩ,

RLOAD = 10kΩ, CLOAD = 100pF

CLOAD = 100pF,

CS

= HIGH, DIN = LOW)

CLOAD = 100pF,

CS

= HIGH, DIN = LOW)

MAX1020 toc58

MAX1020 toc59

MAX1020 toc60

SCLK

CS

SCLK

2V/div

2V/div

1V/div

VOUT

VOUT

VOUT

20mV/div

100mV/div

100mV/div

AC-COUPLED

AC-COUPLED

AC-COUPLED

MAX1021/MAX1023/MAX1057

MAX1020/MAX1022/MAX1058

MAX1020/MAX1022/MAX1058

1 s

200ns

200ns

NEGATIVE FULL-SCALE SETTLING TIME

NEGATIVE FULL-SCALE SETTLING TIME

POSITIVE FULL-SCALE SETTLING TIME

RLOAD = 10kΩ, CLOAD = 100pF

RLOAD = 10kΩ, CLOAD = 100pF

RLOAD = 10kΩ, CLOAD = 100pF

MAX1020 toc61

MAX1020 toc62

MAX1020 toc63

MAX1021/MAX1023/MAX1057

MAX1021/MAX1023/MAX1057

VOUT

V

LDAC

VOUT_

1V/div

2V/div

1V/div

VOUT_

2V/div

V

V

LDAC

LDAC

1V/div

1V/div

MAX1020/MAX1022/MAX1058

1 s

2 s

1 s

POSITIVE FULL-SCALE SETTLING TIME

ADC REFERENCE FEEDTHROUGH

ADC REFERENCE FEEDTHROUGH

RLOAD = 10kΩ, CLOAD = 100pF

RLOAD = 10kΩ, CLOAD = 100pF

RLOAD = 10kΩ, CLOAD = 100pF

MAX1020 toc64

MAX1020 toc65

MAX1020 toc66

VREF2

VREF2

1V/div

VLDAC

2V/div

2V/div

VOUT_

VDAC-OUT

2V/div

VDAC-OUT

10mV/div

AC-COUPLED

2mV/div

AC-COUPLED

MAX1021/MAX1023/MAX1057

MAX1020/MAX1022/MAX1058

MAX1020/MAX1022/MAX1058

ADC REFERENCE SWITCHING

ADC REFERENCE SWITCHING

1 s

200 s

200 s

MAX1023/MAX1057/MAX1058–MAX1020

______________________________________________________________________________________ 15