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MAX1277 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX1277
Description  1.5Msps, Single-Supply, Low-Power, True-Differential, 12-Bit ADCs with Internal Reference
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1277 Datasheet(HTML) 1 Page - Maxim Integrated Products

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General Description
The MAX1277/MAX1279 are low-power, high-speed, seri-
al-output, 12-bit, analog-to-digital converters (ADCs) with
an internal reference that operates at up to 1.5Msps.
These devices feature true-differential inputs, offering bet-
ter noise immunity, distortion improvements, and a wider
dynamic range over single-ended inputs. A standard
SPI™/QSPI™/MICROWIRE™ interface provides the clock
necessary for conversion. These devices easily interface
with standard digital signal processor (DSP) synchronous
serial interfaces.
The MAX1277/MAX1279 operate from a single +2.7V to
+3.6V supply voltage. The MAX1277/MAX1279 include a
2.048V internal reference. The MAX1277 has a unipolar
analog input, while the MAX1279 has a bipolar analog
input. These devices feature a partial power-down mode
and a full power-down mode for use between conver-
sions, which lower the supply current to 2mA (typ) and
1µA (max), respectively. Also featured is a separate
power-supply input (VL), which allows direct interfacing to
+1.8V to VDD digital logic. The fast conversion speed,
low-power dissipation, excellent AC performance, and DC
accuracy (±1 LSB INL) make the MAX1277/MAX1279
ideal for industrial process control, motor control, and
base-station applications.
The MAX1277/MAX1279 come in a 12-pin TQFN pack-
age, and are available in the commercial (0°C to +70°C)
and extended (-40°C to +85°C) temperature ranges.
Applications
Data Acquisition
Communications
Bill Validation
Portable Instruments
Motor Control
Features
♦ 1.5Msps Sampling Rate
♦ Only 22mW (typ) Power Dissipation
♦ Only 1µA (max) Shutdown Current
♦ High-Speed, SPI-Compatible, 3-Wire Serial Interface
♦ 68.5dB S/(N + D) at 525kHz Input Frequency
♦ Internal True-Differential Track/Hold (T/H)
♦ Internal 2.048V Reference
♦ No Pipeline Delays
♦ Small 12-Pin TQFN Package
1.5Msps, Single-Supply, Low-Power, True-
Differential, 12-Bit ADCs with Internal Reference
________________________________________________________________ Maxim Integrated Products
1
12
AIN+
11
N.C.
10
SCLK
45
N.C.
6
GND
1
2
REF
3
9
8
7
RGND
CNVST
DOUT
VL
MAX1277
MAX1279
AIN-
VDD
TQFN
TOP VIEW
PART
TEMP RANGE
PIN-
PACKAGE
INPUT
MAX1277ACTC-T
0
°C to +70°C 12 TQFN-12
Unipolar
MAX1277BCTC-T
0
°C to +70°C 12 TQFN-12
Unipolar
MAX1277AETC-T
-40
°C to +85°C 12 TQFN-12
Unipolar
MAX1277BETC-T
-40
°C to +85°C 12 TQFN-12
Unipolar
MAX1279ACTC-T
0
°C to +70°C 12 TQFN-12
Bipolar
MAX1279BCTC-T
0
°C to +70°C 12 TQFN-12
Bipolar
MAX1279AETC-T
-40
°C to +85°C 12 TQFN-12
Bipolar
MAX1279BETC-T
-40
°C to +85°C 12 TQFN-12
Bipolar
Pin Configuration
Ordering Information
MAX1277
MAX1279
DOUT
AIN+
4.7
µF
10
µF
10
µF
+2.7V TO +3.6V
0.01
µF
0.01
µF
0.01
µF
+1.8V TO VDD
AIN-
REF
VDD
DIFFERENTIAL
INPUT
VOLTAGE
RGND
VL
GND
CNVST
SCLK
µC/DSP
+
-
Typical Operating Circuit
19-3365; Rev 0; 8/04
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.
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.


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