Document
19-2083; Rev 0; 8/01
16-Bit ADC, 200ksps, 5V Single-Supply with Reference
General Description
The MAX1132/MAX1133 are 200ksps, 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, clock, a +4.096V reference, and three general-purpose digital output pins (for external multiplexer or PGA control) in a 20-pin SSOP package. The excellent dynamic performance (SINAD ≥ 85dB), high-speed (200ksps), and low power (7.5mA) of these ADCs, make them ideal for applications such as industrial process control, instrumentation, and medical applications. The MAX1132 accepts input signals of 0 to +12V (unipolar) or ±12V (bipolar), while the MAX1133 accepts input signals of 0 to +4.096V (unipolar) or ±4.096V (bipolar). Operating from a single +4.75V to +5.25V analog supply and a +4.75V to +5.25V digital supply, power-down modes reduce current consumption to 1mA at 10ksps and further reduce supply current to less than 20µA at slower data rates. A serial strobe output (SSTRB) allows direct connection to the TMS320 family of digital signal processors. The MAX1132/MAX1133 user can select either the internal clock, or an external serial-interface clock for the ADC to perform analog-to-digital conversions. The MAX1132/MAX1133 feature internal calibration circuitry 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 a PGA.
Features
o 200ksps (Bipolar) and 150ksps (Unipolar) Sampling ADC o 16-Bits, No Missing Codes o 1.5LSB INL Guaranteed o 85dB (min) SINAD o +5V Single-Supply Operation o Low-Power Operation, 7.5mA (Unipolar Mode) o 2.5µA Shutdown Mode o Software-Configurable Unipolar and Bipolar Input Ranges 0 to +12V and ±12V (MAX1132) 0 to +4.096V and ±4.096V (MAX1133) Internal or External Reference o Internal or External Clock o SPI/QSPI/MICROWIRE-Compatible Serial Interface o Three User-Programmable Logic Outputs o Small 20-Pin SSOP Package
MAX1132/MAX1133
Ordering Information
PART MAX1132ACAP* TEMP. RANGE 0°C to +70°C 0°C to +70°C PIN-PACKAGE 20 SSOP 20 SSOP INL (LSB) ±1.5 ±2.5
Applications
Industrial Process Control Industrial I/O Modules Data-Acquisition Systems Medical Instruments Portable and Battery-Powered Equipment
MAX1132BCAP
Ordering Information continued at end of data sheet.
Pin Configuration
TOP VIEW
REF 1 REFADJ 2 AGND 3 AVDD 4 DGND 5 SHDN 6 20 AIN 19 AGND 18 CREF 17 CS
MAX1132 MAX1133
16 DIN 15 DVDD 14 DGND 13 SCLK 12 RST 11 DOUT
Functional Diagram appears at end of data sheet. Typical Application Circuit appears at end of data sheet. SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
P2 7 P1 8 P0 9 SSTRB 10
SSOP
________________________________________________________________ Maxim Integrated Products
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