MAX1135

Features:

 150ksps (Bipolar) and 125ksps (Unipolar)
   Sampling ADC
 16 Bits, No Missing Codes
 1LSB INL (typ) Guaranteed
 -100dB THD
 3.3V Single-Supply Operation
 Low-Power Operation
  4.5mA (typ) (Unipolar Mode)
 1.2µA Shutdown Mode
 Software-Configurable Unipolar and Bipolar Input Ranges
   0 to +6V and ±6V (MAX1134)
   0 to +2.048V and ±2.048V (MAX1135)
 Internal or External Clock
 SPI/QSPI/MICROWIRE TMS320-Compatible Serial Interface
 Three User-Programmable Logic Outputs
 Small 20-Pin SSOP Package


Application

Industrial Process Control
Industrial I/O Modules
Data-Acquisition Systems
Medical Instruments
Portable and Battery-Powered Equipment


Pinout




Specifications

AVDD to AGND, DVDD to DGND ..............................-0.3V to +6V
AGND to DGND.....................................................-0.3V to +0.3V
AIN to AGND ..................................................................±16.5V
CREF, REF to AGND..................................-0.3V to (AVDD + 0.3V)
Digital Inputs to DGND............................................-0.3V to +6V
Digital Outputs to DGND .........................-0.3V to (DVDD + 0.3V)
Continuous Power Dissipation (TA = +70°C)
20-Pin SSOP (derate 8.00mW/°C above +70°C) .........640mW
Operating Temperature Ranges
MAX113_ _CAP...................................................0°C to +70°C
MAX113_ _EAP................................................-40°C to +85°C
Storage Temperature Range ........................-60°C to +150°C
Junction Temperature...................................................+150°C
Lead Temperature (soldering, 10s) .............................+300°C


Description

The MAX1134/MAX1135 are 150ksps, 16-bit ADCs. These serially interfaced ADCs connect directly to SPI™, QSPI™, and MICROWIRE™ devices without external logic. They combine an input scaling network, internal track/hold (T/H), clock, and three general-purpose digital output pins (for external multiplexer or PGA control) in a 20-pin SSOP package. The excellent dynamic perfor- mance (THD 90dB), high speed (150ksps in bipolar mode), and low power (8.0mA) of these ADCs make them ideal for applications such as industrial process control, instrumentation, and medical applications.
The MAX1134 accepts input signals of 0 to +6V (unipo- lar) or ±6V (bipolar), while the MAX1135 accepts input signals of 0 to +2.048V (unipolar) or ±2.048V (bipolar). Operating from a single 3.135V to 3.465V analog and digital supply, power-down modes reduce current con- sumption to 0.15mA at 10ksps and further reduce sup-
ply current to less than 20µA at slower data rates.
A serial strobe output (SSTRB) allows direct connection to the TMS320 family digital-signal processors. The MAX1134/MAX1135 user can select either the internal clock or an external serial-interface clock for the ADC to perform analog-to-digital conversions.
The MAX1134/MAX1135 feature internal calibration cir- cuitry to correct linearity and offset errors. On-demand calibration allows the user to optimize performance. Three user-programmable logic outputs are provided for the control of an 8-channel mux or PGA.
The MAX1134/MAX1135 are available in a 20-pin SSOP package and are fully specified over the -40°C to +85°C temperature range.