DataSheet.es    


PDF MAX1297 Data sheet ( Hoja de datos )

Número de pieza MAX1297
Descripción 12-Bit ADCs
Fabricantes Maxim Integrated 
Logotipo Maxim Integrated Logotipo



Hay una vista previa y un enlace de descarga de MAX1297 (archivo pdf) en la parte inferior de esta página.


Total 19 Páginas

No Preview Available ! MAX1297 Hoja de datos, Descripción, Manual

19-1530; Rev 3; 12/02
EVAALVUAAILTAIOBNLEKIT 265ksps, +3V, 6-/2-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
General Description
The MAX1295/MAX1297 low-power, 12-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 12-bit parallel interface. They operate with
a single +2.7V to +3.6V analog supply.
Power consumption is only 5.4mW at the maximum
sampling rate of 265ksps. Two software-selectable
power-down modes enable the MAX1295/MAX1297 to
be shut down between conversions; accessing the par-
allel interface returns them to normal operation.
Powering down between conversions can reduce sup-
ply current below 10µA at lower sampling rates.
Both devices offer software-configurable analog inputs
for unipolar/bipolar and single-ended/pseudo-differen-
tial operation. In single-ended mode, the MAX1295 has
six input channels and the MAX1297 has two (three
input channels and one input channel, respectively,
when in pseudo-differential mode).
Excellent dynamic performance and low power, combined
with ease of use and small package size, make these con-
verters ideal for battery-powered and data-acquisition
applications or for other circuits with demanding power-
consumption and space requirements.
The MAX1295/MAX1297 tri-states INT when CS goes high.
Refer to MAX1265/MAX1267 if tri-stating INT is not desired.
The MAX1295 is offered in a 28-pin QSOP package, while
the MAX1297 comes in a 24-pin QSOP. For pin-compati-
ble +5V, 12-bit versions, refer to the MAX1294/MAX1296
data sheet.
Applications
Industrial Control Systems
Energy Management
Data-Acquisition Systems
Data Logging
Patient Monitoring
Touchscreens
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX1295ACEI 0°C to +70°C
MAX1295BCEI 0°C to +70°C
MAX1295AEEI -40°C to +85°C
MAX1295BEEI -40°C to +85°C
MAX1297ACEG 0°C to +70°C
MAX1297BCEG 0°C to +70°C
MAX1297AEEG -40°C to +85°C
MAX1297BEEG -40°C to +85°C
28 QSOP
28 QSOP
28 QSOP
28 QSOP
24 QSOP
24 QSOP
24 QSOP
24 QSOP
INL
(LSB)
±0.5
±1
±0.5
±1
±0.5
±1
±0.5
±1
Features
12-Bit Resolution, ±0.5 LSB Linearity
+3V Single-Supply Operation
Internal +2.5V Reference
Software-Configurable Analog Input Multiplexer
6-Channel Single-Ended/
3-Channel Pseudo-Differential (MAX1295)
2-Channel Single-Ended/
1-Channel Pseudo-Differential (MAX1297)
Software-Configurable Unipolar/Bipolar
Analog Inputs
Low Current
1.9mA (265ksps)
1.0mA (100ksps)
400µA (10ksps)
2µA (Shutdown)
Internal 3MHz Full-Power Bandwidth Track/Hold
Parallel 12-Bit Interface
Small Footprint
28-Pin QSOP (MAX1295)
24-Pin QSOP (MAX1297)
Pin Configurations
TOP VIEW
D9 1
D8 2
D7 3
D6 4
D5 5
D4 6
D3 7
D2 8
D1 9
D0 10
INT 11
RD 12
WR 13
CLK 14
MAX1295
28 D10
27 D11
26 VDD
25 REF
24 REFADJ
23 GND
22 COM
21 CH0
20 CH1
19 CH2
18 CH3
17 CH4
16 CH5
15 CS
QSOP
Pin Configurations continued at end of data sheet.
Typical Operating Circuits appear 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




MAX1297 pdf
265ksps, +3V, 6-/2-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
Typical Operating Characteristics
(VDD = +3V, VREF = +2.500V, fCLK = 4.8MHz, CL = 20pF, TA = +25°C, unless otherwise noted.)
0.5
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0
INTEGRAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
1000 2000 3000 4000 5000
DIGITAL OUTPUT CODE
SUPPLY CURRENT vs. SUPPLY VOLTAGE
2.10
RL =
CODE = 101010100000
2.05
2.00
1.95
1.90
1.85
1.80
2.7
930
3.0 3.3
VDD (V)
STANDBY CURRENT
vs. TEMPERATURE
3.6
0.5
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0
DIFFERENTIAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
1000 2000 3000 4000 5000
DIGITAL OUTPUT CODE
SUPPLY CURRENT vs. TEMPERATURE
2.2
RL =
CODE = 101010100000
2.1
2.0
1.9
1.8
1.7
1.6
-40
1.50
-15 10 35 60
TEMPERATURE (°C)
POWER-DOWN CURRENT
vs. SUPPLY VOLTAGE
85
10,000
1000
SUPPLY CURRENT
vs. SAMPLE FREQUENCY
WITH INTERNAL REFERENCE
100
10
0
0.1 1
WITH EXTERNAL REFERENCE
10 100 1k 10k 100k 1M
fSAMPLE (Hz)
STANDBY CURRENT vs. SUPPLY VOLTAGE
930
920
910
900
890
880
2.7
1.2
3.0 3.3
VDD (V)
POWER-DOWN CURRENT
vs. TEMPERATURE
3.6
920
1.25 1.1
910
1.00 1.0
900
0.75 0.9
890
880
-40
-15 10 35 60
TEMPERATURE (°C)
85
0.50
2.7
3.0 3.3
VDD (V)
0.8
3.6 -40 -15 10 35 60 85
TEMPERATURE (°C)
_______________________________________________________________________________________ 5

5 Page





MAX1297 arduino
265ksps, +3V, 6-/2-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
CS
WR
D7–D0
INT HIGH-Z
RD
tCS
tCSWS
tWR
tACQ
tCSWH
tCONV
tDS
CONTROL
BYTE
ACQMOD = "0"
tDH
DOUT
HIGH-Z
tINT1
tD0
HIGH-Z
DATA VALID
tTR
HIGH-Z
Figure 4. Conversion Timing Using Internal Acquisition Mode
Together with the input impedance, this capacitor
forms an RC filter, limiting the ADC’s signal bandwidth.
Input Bandwidth
The MAX1295/MAX1297 T/H stage offers a 250kHz full-
linear and a 3MHz full-power bandwidth. This makes it
possible to digitize high-speed transients and measure
periodic signals with bandwidths exceeding the ADC’s
sampling rate by using undersampling techniques. To
avoid high-frequency signals being aliased into the fre-
quency band of interest, anti-alias filtering is recom-
mended.
Starting a Conversion
Initiate a conversion by writing a control byte that selects
the multiplexer channel and configures the MAX1295/
MAX1297 for either unipolar or bipolar operation. A
write pulse (WR + CS) can either start an acquisition
interval or initiate a combined acquisition plus conver-
sion. The sampling interval occurs at the end of the
acquisition interval. The acquisition mode (ACQMOD)
bit in the input control byte (Table 1) offers two options
for acquiring the signal: an internal and an external
acquisition. The conversion period lasts for 13 clock
cycles in either the internal or external clock or acquisi-
tion mode. Writing a new control byte during a conver-
sion cycle aborts the conversion and starts a new
acquisition interval.
Internal Acquisition
Select internal acquisition by writing the control byte
with the ACQMOD bit cleared (ACQMOD = 0). This
causes the write pulse to initiate an acquisition interval
whose duration is internally timed. Conversion starts
when this acquisition interval (three external clock
cycles or approximately 1µs in internal clock mode)
ends (Figure 4). Note that, when the internal acquisition
is combined with the internal clock, the aperture jitter
can be as high as 200ps. Internal clock users wishing
to achieve the 50ps jitter specification should always
use external acquisition mode.
______________________________________________________________________________________ 11

11 Page







PáginasTotal 19 Páginas
PDF Descargar[ Datasheet MAX1297.PDF ]




Hoja de datos destacado

Número de piezaDescripciónFabricantes
MAX1290250ksps / +3V / 8-/4-Channel / 12-Bit ADCs with +2.5V Reference and Parallel InterfaceMaxim Integrated
Maxim Integrated
MAX129112-Bit ADCsMaxim Integrated
Maxim Integrated
MAX1292400ksps / +5V / 8-/4-Channel / 12-Bit ADCs with +2.5V Reference and Parallel InterfaceMaxim Integrated
Maxim Integrated
MAX129312-Bit ADCsMaxim Integrated
Maxim Integrated

Número de piezaDescripciónFabricantes
SLA6805M

High Voltage 3 phase Motor Driver IC.

Sanken
Sanken
SDC1742

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

Analog Devices
Analog Devices


DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.


DataSheet.es    |   2020   |  Privacy Policy  |  Contacto  |  Buscar