MAX1077 Datasheet, PDF (1/18 Pages) Maxim Integrated Products – 1.5Msps, Single-Supply, Low-Power, True-Differential, 10-Bit ADCs with Internal Reference

19-3363; Rev 1; 3/11
1.5Msps, Single-Supply, Low-Power, True-
Differential, 10-Bit ADCs with Internal Reference
General Description
The MAX1077/MAX1079 are low-power, high-speed, seri-
al-output, 10-bit, analog-to-digital converters (ADCs) that
operate at up to 1.5Msps and have an internal reference.
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 MAX1077/MAX1079 operate from a single +2.7V to
+3.6V supply voltage. The MAX1077/MAX1079 include a
2.048V internal reference. The MAX1077 has a unipolar
analog input, while the MAX1079 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 (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 MAX1077/MAX1079
ideal for industrial process control, motor control, and
base-station applications.
The MAX1077/MAX1079 come in a 12-pin TQFN pack-
age, and are available in the extended (-40°C to +85°C)
temperature range.
Data Acquisition
Bill Validation
Motor Control
Applications
Communications
Portable Instruments
Features
o 1.5Msps Sampling Rate
o Only 22mW (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 Internal 2.048V Reference
o No Pipeline Delays
o Small 12-Pin TQFN Package
Ordering Information
PART
TEMP RANGE ^PIN-
PACKAGE
INPUT
MAX1077ETC+T -40°C to +85°C 12 TQFN-EP* Unipolar
MAX1079ETC+T -40°C to +85°C 12 TQFN-EP* Bipolar
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*EP = Exposed pad.
Pin Configuration
Typical Operating Circuit
TOP VIEW
AIN+ N.C. SCLK
+
12 11 10
+2.7V TO +3.6V
+1.8V TO V_DD
AIN- 1
9 CNVST
REF 2
RGND 3
MAX1077
MAX1079
EP
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.
10µF
DIFFERENTIAL ₊
INPUT
VOLTAGE ^-
4.7µF 0.01µF
0.01µF
V_DD
0.01µF
V_L
AIN+
DOUT
AIN-
MAX1077
MAX1079 ^CNVST
SCLK
REF
RGND
GND
10µF
µC/DSP
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.