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PDF MAX1302 Data sheet ( Hoja de datos )
| Número de pieza | MAX1302 | |
| Descripción | (MAX1302 / MAX1303) Serial 16-Bit ADCs | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-3576; Rev 0; 5/05
8-/4-Channel, ±VREF Multirange Inputs,
Serial 16-Bit ADCs
General Description
The MAX1302/MAX1303 multirange, low-power, 16-bit,
successive-approximation, analog-to-digital converters
(ADCs) operate from a single +5V supply and achieve
throughput rates up to 115ksps. A separate digital sup-
ply allows digital interfacing with 2.7V to 5.25V systems
using the SPI™-/QSPI™-/MICROWIRE™-compatible
serial interface. Partial power-down mode reduces the
supply current to 1.3mA (typ). Full power-down mode
reduces the power-supply current to 1µA (typ).
The MAX1302 provides eight (single-ended) or four
(true differential) analog input channels. The MAX1303
provides four (single-ended) or two (true differential)
analog input channels. Each analog input channel is
independently software programmable for seven
single-ended input ranges (0 to +VREF/2, -VREF/2 to 0,
0 to +VREF, -VREF to 0, ±VREF/4, ±VREF/2, and ±VREF),
and three differential input ranges (±VREF/2, ±VREF,
±2 x VREF).
An on-chip +4.096V reference offers a small convenient
ADC solution. The MAX1302/MAX1303 also accept an
external reference voltage between 3.800V and 4.136V.
The MAX1302 is available in a 24-pin TSSOP package
and the MAX1303 is available in a 20-pin TSSOP pack-
age. Each device is specified for operation from -40°C
to +85°C.
Applications
Industrial Control Systems
Data-Acquisition Systems
Avionics
Robotics
SPI and QSPI are a trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Features
♦ Software-Programmable Input Range for Each
Channel
♦ Single-Ended Input Ranges
0 to +VREF/2, -VREF/2 to 0, 0 to +VREF, -VREF
to 0, ±VREF/4, ±VREF/2, and ±VREF
♦ Differential Input Ranges
±VREF/2, ±VREF, and ±2 x VREF
♦ Eight Single-Ended or Four Differential Analog
Inputs (MAX1302)
♦ Four Single-Ended or Two Differential Analog
Inputs (MAX1303)
♦ ±6V Overvoltage Tolerant Inputs
♦ Internal or External Reference
♦ 115ksps Maximum Sample Rate
♦ Single +5V Power Supply
♦ 20-/24-Pin TSSOP Package
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
CHANNELS
MAX1302AEUG* -40°C to +85°C 24 TSSOP
MAX1302BEUG* -40°C to +85°C 24 TSSOP
8
8
MAX1303AEUP* -40°C to +85°C 20 TSSOP
MAX1303BEUP -40°C to +85°C 20 TSSOP
4
4
*Future product—contact factory for availability.
Pin Configurations
TOP VIEW
AVDD1 1
CH0 2
CH1 3
CH2 4
CH3 5
CH4 6
CH5 7
CH6 8
CH7 9
CS 10
DIN 11
SSTRB 12
MAX1302
24 AGND1
23 AGND2
22 AVDD2
21 AGND3
20 REF
19 REFCAP
18 DVDD
17 DVDDO
16 DGND
15 DGNDO
14 DOUT
13 SCLK
TSSOP
Pin Configurations continued at end of data sheet.
________________________________________________________________ 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.
1 page  
8-/4-Channel, ±VREF Multirange Inputs,
Serial 16-Bit ADCs
ELECTRICAL CHARACTERISTICS (continued)
(AVDD1 = AVDD2 = DVDD = DVDDO = 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, fCLK = 3.5MHz (50% duty cycle),
external clock mode, VREF = 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input range
(±VREF), CDOUT = 50pF, CSSTRB = 50pF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Preamplifier Supply Voltage
Digital I/O Supply Voltage
AVDD1 Supply Current
SYMBOL
AVDD2
DVDDO
CONDITIONS
IAVDD1
External clock mode,
external acquisition
mode, or internal
clock mode
Internal reference
External reference
MIN TYP MAX UNITS
4.75 5.25 V
2.70 5.25 V
3 3.5
mA
2.5 3
DVDD Supply Current
IDVDD
External clock mode, external acquisition
mode, or internal clock mode
AVDD2 Supply Current
IAVDD2
External clock mode, external acquisition
mode, or internal clock mode
DVDDO Supply Current
IDVDDO
External clock mode, external acquisition
mode, or internal clock mode
Total Supply Current
Partial power-down mode
Full power-down mode
Power-Supply Rejection Ratio
PSRR All analog input ranges
TIMING CHARACTERISTICS (Figures 15 and 16)
External clock mode
SCLK Period
tCP External acquisition mode
Internal clock mode
External clock mode
SCLK High Pulse Width (Note 5)
tCH External acquisition mode
Internal clock mode
External clock mode
SCLK Low Pulse Width (Note 5)
tCL External acquisition mode
Internal clock mode
DIN to SCLK Setup
DIN to SCLK Hold
tDS
tDH
SCLK Fall to DOUT Valid
CS Fall to DOUT Enable
tDO
tDV
0.9 2
17.5 25
0.2
1.3
2
±0.5
1
272 62
228 62
100 83
109
92
40
109
92
40
40
0
40
40
mA
mA
mA
mA
µA
LSB
µs
ns
ns
ns
ns
ns
ns
_______________________________________________________________________________________ 5
5 Page 
8-/4-Channel, ±VREF Multirange Inputs,
Serial 16-Bit ADCs
Typical Operating Characteristics (continued)
(AVDD1 = AVDD2 = DVDD = DVDDO = 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, fCLK = 3.5MHz (50% duty cycle),
external clock mode, VREF = 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input range
(±VREF), CDOUT = 50pF, CSSTRB = 50pF; unless otherwise noted.)
FULL-POWER BANDWIDTH
0
35,000
NOISE HISTOGRAM
(CODE EDGE)
65,534 SAMPLES
-10 30,000
25,000
-20
20,000
-30
15,000
-40
10,000
-50 5000
-60
1
10 100 1000
FREQUENCY (kHz)
10,000
0
32,769 32,770 32,771 32,772 32,773 32,774
CODE
40,000
35,000
NOISE HISTOGRAM
(CODE CENTER)
65,534 SAMPLES
30,000
25,000
20,000
15,000
10,000
5000
0
32,767
32,769
32,771
32,773
32,768
32,770
32,772
CODE
REFERENCE VOLTAGE vs. TIME
MAX1302/03 toc29
4ms/div
1V/div
0V
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 31 Páginas | |
| PDF Descargar | [ Datasheet MAX1302.PDF ] | |
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