MAX1072 Datasheet, PDF (1/18 Pages) Maxim Integrated Products – 1.8Msps, Single-Supply, Low-Power, True-Differential, 10-Bit ADCs

19-3153; Rev 0; 1/04
1.8Msps, Single-Supply, Low-Power,
True-Differential, 10-Bit ADCs
General Description
The MAX1072/MAX1075 low-power, high-speed, serial-
output, 10-bit, analog-to-digital converters (ADCs) oper-
ate at up to 1.8Msps. These devices feature true-differen-
tial inputs, offering better 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 MAX1072/MAX1075 operate from a single +4.75V to
+5.25V supply voltage and require an external reference.
The MAX1072 has a unipolar analog input, while the
MAX1075 has a bipolar analog input. These devices fea-
ture a partial power-down mode and a full power-down
mode for use between conversions, which lower the sup-
ply current to 1mA (typ) and 1µA (max), respectively. Also
featured is a separate power-supply input (V_L), which
allows direct interfacing to +1.8V to V_DD digital logic. The
fast conversion speed, low-power dissipation, excellent
AC performance, and DC accuracy (±0.5 LSB INL) make
the MAX1072/MAX1075 ideal for industrial process con-
trol, motor control, and base-station applications.
The MAX1072/MAX1075 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
Bill Validation
Motor Control
Communications
Portable Instruments
Pin Configuration
Features
o 1.8Msps Sampling Rate
o Only 45mW (typ) Power Dissipation
o Only 1µA (max) Shutdown Current
o High-Speed, SPI-Compatible, 3-Wire Serial Interface
o 61dB S/(N + D) at 525kHz Input Frequency
o Internal True-Differential Track/Hold (T/H)
o External Reference
o No Pipeline Delays
o Small 12-Pin TQFN Package
PART
MAX1072CTC-T
MAX1072ETC-T
MAX1075CTC-T
MAX1075ETC-T
Ordering Information
TEMP RANGE
PIN-
PACKAGE
0°C to +70°C 12 TQFN-12
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
12 TQFN-12
12 TQFN-12
12 TQFN-12
INPUT
Unipolar
Unipolar
Bipolar
Bipolar
Typical Operating Circuit
TOP VIEW
AIN+ N.C. SCLK
12 11 10
AIN- 1
REF 2
RGND 3
MAX1072
MAX1075
9 CNVST
8 DOUT
7 V_L
4
5
6
V_DD N.C. GND
TQFN
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
+4.75V TO +5.25V
+1.8V TO V_DD
10µF
DIFFERENTIAL ₊
INPUT
VOLTAGE ^-
REF
4.7µF
0.01µF
0.01µF
V_DD
0.01µF
V_L
AIN+
DOUT
AIN-
MAX1072
MAX1075 ^CNVST
SCLK
REF
RGND
GND
10µF
µC/DSP
________________________________________________________________ Maxim Integrated Products 1
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