19-3292; Rev 0; 5/04
1.5Msps, Single-Supply, Low-Power,
True-Differential, 10-Bit ADCs
General Description
Features
The MAX1070/MAX1071 low-power, high-speed, serial-
output, 10-bit, analog-to-digital converters (ADCs) oper-
ate at up to 1.5Msps. 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.
♦ 1.5Msps Sampling Rate
♦ Only 18mW (typ) Power Dissipation
♦ Only 1µA (max) Shutdown Current
♦ High-Speed, SPI-Compatible, 3-Wire Serial Interface
♦ 61dB S/(N + D) at 525kHz Input Frequency
♦ Internal True-Differential Track/Hold (T/H)
♦ External Reference
The MAX1070/MAX1071 operate from a single +2.7V to
+3.6V supply voltage and require an external reference.
The MAX1070 has a unipolar analog input, while the
MAX1071 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
♦ No Pipeline Delays
♦ Small 12-Pin TQFN Package
featured is a separate power-supply input (V ), which
L
allows direct interfacing to +1.8V to V
digital logic. The
DD
fast conversion speed, low-power dissipation, excellent
AC performance, and DC accuracy ( 0.5 LSꢀ IꢁL) make
the MAX1070/MAX1071 ideal for industrial process con-
trol, motor control, and base-station applications.
Ordering Information
PIN-
PACKAGE
The MAX1070/MAX1071 come in a 12-pin TQFꢁ pack-
age, and are available in the commercial (0°C to +70°C)
and extended (-40°C to +85°C) temperature ranges.
PART
TEMP RANGE
INPUT
MAX1070CTC-T
MAX1070ETC-T
MAX1071CTC-T
MAX1071ETC-T
0°C to +70°C 12 TQFꢁ-12 Unipolar
-40°C to +85°C 12 TQFꢁ-12 Unipolar
Applications
0°C to +70°C 12 TQFꢁ-12
-40°C to +85°C 12 TQFꢁ-12
ꢀipolar
ꢀipolar
Data Acquisition
ꢀill Validation
Motor Control
Communications
Portable Instruments
Typical Operating Circuit
Pin Configuration
TOP VIEW
AIN+
12
N.C.
11
SCLK
10
+1.8V TO V
DD
+2.7V TO +3.6V
0.01µF
0.01µF
10µF
10µF
AIN-
REF
1
2
3
9
8
7
CNVST
DOUT
V
V
L
DD
DIFFERENTIAL
INPUT
+
-
DOUT
AIN+
AIN-
MAX1070
MAX1071
VOLTAGE
µC/DSP
RGND
V
L
MAX1070
MAX1071
CNVST
SCLK
REF
4.7µF
REF
4
5
6
0.01µF
V
N.C.
GND
RGND
GND
DD
TQFN
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________ 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.