MAX1081BEUP+ Maxim Integrated Products, MAX1081BEUP+ Datasheet

IC ADC 10BIT 300KSPS 20-TSSOP

MAX1081BEUP+

Manufacturer Part Number
MAX1081BEUP+
Description
IC ADC 10BIT 300KSPS 20-TSSOP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX1081BEUP+

Number Of Bits
10
Sampling Rate (per Second)
300k
Data Interface
MICROWIRE™, QSPI™, Serial, SPI™
Number Of Converters
1
Power Dissipation (max)
8.0mW
Voltage Supply Source
Analog and Digital
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-TSSOP
Number Of Adc Inputs
8
Architecture
SAR
Conversion Rate
300 KSPs
Resolution
10 bit
Input Type
Differential
Interface Type
4-Wire (SPI, QSPI, MICROWIRE, TMS320)
Voltage Reference
Internal 2.5 V or External
Supply Voltage (max)
3.6 V
Supply Voltage (min)
2.7 V
Maximum Power Dissipation
559 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
8-Channel, Serial 10-Bit ADCs with Internal Reference
The MAX1080/MAX1081 10-bit analog-to-digital convert-
ers (ADCs) combine an 8-channel analog-input multiplex-
er, high-bandwidth track/hold (T/H), and serial interface
with high conversion speed and low power consumption.
The MAX1080 operates from a single +4.5V to +5.5V sup-
ply; the MAX1081 operates from a single +2.7V to +3.6V
supply. Both devices’ analog inputs are software config-
urable for unipolar/bipolar and single-ended/pseudo-dif-
ferential operation.
The 4-wire serial interface connects directly to
SPI™/QSPI™ and MICROWIRE™ devices without external
logic. A serial strobe output allows direct connection to
TMS320-family digital signal processors. The MAX1080/
MAX1081 use an external serial-interface clock to perform
successive-approximation analog-to-digital conversions.
The devices feature an internal +2.5V reference and a ref-
erence-buffer amplifier with a ±1.5% voltage-adjustment
range. An external reference with a 1V to V
also be used.
The MAX1080/MAX1081 provide a hard-wired SHDN pin
and four software-selectable power modes (normal opera-
tion, reduced power (REDP), fast power-down (FASTPD),
and full power-down (FULLPD)). These devices can be
programmed to automatically shut down at the end of a
conversion or to operate with reduced power. When using
the power-down modes, accessing the serial interface
automatically powers up the devices, and the quick turn-
on time allows them to be shut down between all conver-
sions. This technique can cut supply current below 100mA
at lower sampling rates.
The MAX1080/MAX1081 are available in a 20-pin TSSOP
package. These devices are higher-speed versions of the
MAX148/MAX149. For more information, refer to the
respective data sheet.
Typical Operating Circuit appears at end of data sheet.
19-1685; Rev 0; 5/00
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Portable Data Logging
Data Acquisition
Medical Instruments
Battery-Powered Instruments
Pen Digitizers
Process Control
300ksps/400ksps, Single-Supply, Low-Power,
________________________________________________________________ Maxim Integrated Products
General Description
Applications
DD1
range may
o 8-Channel Single-Ended or 4-Channel
o Internal Multiplexer and Track/Hold
o Single-Supply Operation
o Internal +2.5V Reference
o 400ksps Sampling Rate (MAX1080)
o Low Power: 2.5mA (400ksps)
o SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire
o Software-Configurable Unipolar or Bipolar Inputs
o 20-Pin TSSOP Package
Ordering Information continued at end of data sheet.
MAX1080ACUP
MAX1080BCUP
MAX1080AEUP
Pseudo-Differential Inputs
Serial Interface
TOP VIEW
+4.5V to +5.5V (MAX1080)
+2.7V to +3.6V (MAX1081)
PART
SHDN
COM
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
1.3mA (REDP)
0.9mA (FASTPD)
2µA (FULLPD)
-40°C to +85°C
10
1
2
3
4
5
6
7
8
9
0°C to +70°C
0°C to +70°C
RANGE
TEMP.
Ordering Information
MAX1080
MAX1081
TSSOP
Pin Configuration
20
19
18
17
16
15
14
13
12
11
PIN-
PACKAGE
20 TSSOP
20 TSSOP
20 TSSOP
V
DIN
SSTRB
DOUT
GND
REFADJ
REF
V
SCLK
CS
DD1
DD2
Features
(LSB)
±1/2
±1/2
INL
±1
1

Related parts for MAX1081BEUP+

MAX1081BEUP+ Summary of contents

Page 1

... Typical Operating Circuit appears at end of data sheet. SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. ________________________________________________________________ Maxim Integrated Products For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. o 8-Channel Single-Ended or 4-Channel ...

Page 2

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference ABSOLUTE MAXIMUM RATINGS V to GND .............................................................. -0. DD_ ......................................................... -0.3V to 0.3V DD1 DD2 CH0–CH7, COM to GND.......................... -0. REF, REFADJ to ...

Page 3

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference ELECTRICAL CHARACTERISTICS—MAX1080 (continued +4.5V to +5.5V, COM = GND, f DD1 DD2 +2.5V at REF, REFADJ = DD1 A PARAMETER SYMBOL ...

Page 4

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference ELECTRICAL CHARACTERISTICS—MAX1080 (continued +4.5V to +5.5V, COM = GND, f DD1 DD2 +2.5V at REF, REFADJ = DD1 A MIN PARAMETER ...

Page 5

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference ELECTRICAL CHARACTERISTICS—MAX1081 (continued +2.7V to +3.6V, COM = GND, f DD1 DD2 +2.5V at REF, REFADJ = DD1 A PARAMETER SYMBOL ...

Page 6

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference ELECTRICAL CHARACTERISTICS—MAX1081 (continued +2.7V to +3.6V, COM = GND, f DD1 DD2 +2.5V at REF, REFADJ = DD1 A MIN PARAMETER ...

Page 7

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference TIMING CHARACTERISTICS—MAX1081 (Figures +2.7V to +3.6V, T DD1 DD2 PARAMETER SYMBOL SCLK Period SCLK Pulse Width High SCLK Pulse Width Low DIN ...

Page 8

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference (MAX1080 5.0V 6.4MHz; MAX1081: V DD1 DD2 SCLK at REF, 0.01µF capacitor at REFADJ INTEGRAL NONLINEARITY vs. DIGITAL OUTPUT CODE 0.12 0.08 ...

Page 9

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference (MAX1080 5.0V, f DD1 DD2 SCLK at REF, 0.01µF capacitor at REFADJ, T REFERENCE VOLTAGE vs. TEMPERATURE 2.5002 2.5000 MAX1080 2.4998 MAX1081 2.4996 2.4994 2.4992 2.4990 ...

Page 10

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference PIN NAME 1–8 CH0–CH7 Sampling Analog Inputs Ground Reference for Analog Inputs. COM sets zero-code voltage in single-ended mode. Must be 9 COM stable to ±0.5LSB. Active-Low Shutdown Input. Pulling ...

Page 11

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference Detailed Description The MAX1080/MAX1081 ADCs use a successive- approximation conversion technique and input T/H cir- cuitry to convert an analog signal to a 10-bit digital out- put. A flexible serial ...

Page 12

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference The T/H enters its tracking mode on the falling clock edge after the fifth bit of the 8-bit control word has been shifted in. It enters its hold mode on ...

Page 13

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference MAX1080 0 TO MAX1081 +2.500V CH7 ANALOG 0.01µF INPUT REFADJ 0.01µF 2.5V REF 4.7µF Figure 5. Quick-Look Circuit To quickly evaluate the MAX1080/MAX1081s’ analog per- formance, use the circuit of ...

Page 14

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference Table 3. Control-Byte Format BIT 7 BIT 6 BIT 5 (MSB) START SEL2 SEL1 BIT NAME DESCRIPTION The first logic “1” bit after CS goes low defines the beginning of ...

Page 15

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference CS SCLK 1 4 SEL SEL SEL UNI/ SGL/ DIN BIP START HIGH-Z SSTRB RB1 HIGH-Z DOUT IDLE Figure 6. Single-Conversion Timing ___________Applications Information When power is ...

Page 16

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference CS t CSS t CSO SCLK DIN t DOE DOUT t STE SSTRB Figure 7. Detailed Serial-Interface Timing Table 4. Software-Controlled Power Modes PD1/PD0 MODE Full ...

Page 17

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference CS DIN S CONTROL BYTE SCLK HIGH-Z DOUT HIGH-Z SSTRB Figure 8. Continuous 16-Clock/Conversion Timing 1.50 1.25 1.00 0.75 0.50 0.25 0 0.0001 0.001 0.01 0.1 TIME ...

Page 18

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference fast power-down (FASTPD) or reduced-power (REDP) mode instead of in full power-up can further reduce power consumption. This is achieved by using the sequence shown in Figure 12a. Figure 10b ...

Page 19

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference +3.3V 24k 510k 100k 0.01µF Figure 13. MAX1081 Reference-Adjust Circuit OUTPUT CODE FULL-SCALE TRANSITION 111 110 101 00 ...

Page 20

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference Table 5. Full Scale and Zero Scale UNIPOLAR MODE Full Scale REF COM SUPPLIES V GND DD1 *R = 10Ω V GND V COM DD1 DD2 MAX1080 ...

Page 21

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference 1 CH0 2 CH1 3 CH2 4 ANALOG CH3 MAX1080 INPUTS MAX1081 5 CH4 6 CH5 7 CH6 8 CH7 9 COM V 10 SHDN DD1 Figure 17. QSPI Connections ...

Page 22

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference CS SCLK START SEL2 SEL1 SEL0 DIN SSTRB DOUT Figure 19. MAX1080/MAX1081-to-TMS320 Serial Interface Signal-to-Noise Plus Distortion (SINAD) SINAD is the ratio of the fundamental input frequency’s RMS amplitude to ...

Page 23

Single-Supply, Low-Power, 8-Channel, Serial 10-Bit ADCs with Internal Reference ________________________________________________________Package Information Note: The MAX1080/MAX1081 do not have an exposed die pad. ______________________________________________________________________________________ 23 ...

Page 24

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2000 Maxim Integrated Products ...

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