8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs with ±10V, ±5V, and 0 to +5V Analog Input Ranges

The MAX1316–MAX1318/MAX1320–MAX1322/MAX1324–MAX1326 14-bit, analog-to-digital converters (ADCs) offer two, four, or eight independent input channels. Independent track/hold (T/H) circuitry provides simultaneous sampling for each channel. The MAX1316/MAX1317/MAX1318 have a 0 to +5V input range with ±6.0V fault-tolerant inputs. The MAX1320/MAX1321/MAX1322 have a ±5V input range with ±16.5V fault-tolerant inputs. The MAX1324/MAX1325/MAX1326 have a ±10V input range with ±16.5V fault-tolerant inputs. These ADCs convert two channels in 2µs, and up to eight channels in 3.8µs, and have an 8-channel throughput of 250ksps per channel. Other features include a 10MHz T/H input bandwidth, internal clock, internal (+2.5V) or external (+2.0V to +3.0V) reference, and power-saving modes.

A 16.6MHz, 14-bit, bidirectional, parallel interface provides the conversion results and accepts digital configuration inputs.

These devices operate from a +4.75V to +5.25V analog supply and a separate +2.7V to +5.25V digital supply, and consume less than 50mA total supply current.

These devices come in a 48-pin TQFP package and operate over the extended -40°C to +85°C temperature range.

Applications

* Multiphase Motor Control * Power-Factor Monitoring and Correction * Power-Grid Synchronization * Vibration and Waveform Analysis

* 8-/4-/2-Channel, 14-Bit ADCs

* ±1.5 LSB INL, ±1 LSB DNL, No Missing Codes

* 90dBc SFDR, -86dBc THD, 76.5dB SINAD, 77dB SNR at 100kHz Input

* On-Chip T/H Circuit for Each Channel

* 10ns Aperture Delay

* 50ps Channel-to-Channel T/H Matching

* Fast Conversion Time

* One Channel in 1.6µs

* Two Channels in 1.9µs

* Four Channels in 2.5µs

* Eight Channels in 3.7µs

* High Throughput

* 526ksps/ch for One Channel

* 455ksps/ch for Two Channels

* 357ksps/ch for Four Channels

* 250ksps/ch for Eight Channels

* Flexible Input Ranges

* 0 to +5V (MAX1316/MAX1317/MAX1318)

* ±5V (MAX1320/MAX1321/MAX1322)

* ±10V (MAX1324/MAX1325/MAX1326)

* No Calibration Needed

* 14-Bit, High-Speed, Parallel Interface

* Internal or External Clock

* +2.5V Internal Reference or +2.0V to +3.0V External Reference

* +5V Analog Supply, +3V to +5V Digital Supply

* 46mA Analog Supply Current (typ)

* 1.6mA Digital Supply Current (max)

* Shutdown and Power-Saving Modes

* 48-Pin TQFP Package (7mm x 7mm Footprint)