ADC10838

Features:

·-5V to a5V analog voltage range with g5V supplies
·Serial I/O (MICROWIRE compatible)
·1, 2, 4, or 8-channel differential or single-ended multiplexer
·Software or hardware power down
·Analog input sample/hold function
·Ratiometric or Absolute voltage referencing
·No zero or full scale adjustment required
·No missing codes over temperature
·TTL/MOS input/output compatible
·Standard DIP and SO packages


Application

·Medical instruments
·Remote instrumentation
·Test equipment


Pinout

Specifications

Positive Supply Voltage (V⁺ = AV⁺ = DV⁺)                                   +6.0V
Negative Supply Voltage (V^-)                                                        -6.0V
Total Supply Voltage (V⁺ - V^-)                                                         12V
Total Reference Voltage (VREF⁺±VREF^-)                                     +6.0V
Voltage at Analog Inputs
(CH0-CH7 and COM)                                           V⁺ + 0.3V to V^-  - 0.3V
Voltage at other Inputs and Outputs                        V⁺ + 0.3V to -0.3V
Input Current at Any Pin (Note 4)                                                30 mA
Package Input Current (Note 4)                                                 120 mA
Package Dissipation at T_A = 25 (Note 5)                                500 mW
ESD Susceptability (Note 6)
Human Body Model                                                                      2500V
Machine Model                                                                               150V
Soldering Information
N packages (10 seconds)                                                              260
SO Package (Note 7)
Vapor Phase (60 seconds)                                                            215
Infrared (15 seconds)                                                                   220
Storage Temperature                                                     -40 to +150


Description

This ADC10838 series of CMOS 10-bit plus sign successive approximation A/D converters features versatile analog input multiplexers, sample/hold and a 2.5V band-gap reference. The 1, 2, 4 or 8-channel multiplexers can be software configured for single-ended or differential mode of operation.
An input sample/hold is implemented by a capacitive reference ladder and sampled-data comparator. This allows the analog input to vary during the A/D conversion cycle. In the differential mode, valid outputs are obtained even when the negative inputs are greater than the positive because of the 10-bit plus sign output data format.
The serial I/O ADC10838 is configured to comply with the NSC MICROWIRETM serial data exchange standard for easy interface to the COPSTM and HPCTM families of controllers, and can easily interface with standard shift registers and microprocessors.