The MAX1304–MAX1306/MAX1308–MAX1310/MAX1312–MAX1314 12-bit, analog-to-digital converters (ADCs) offer eight, four, or two independent input channels. Independent track-and-hold (T/H) circuitry provides simultaneous sampling for each channel. The MAX1304/MAX1305/MAX1306 provide a 0 to +5V input range with ±6V fault-tolerant inputs. The MAX1308/MAX1309/MAX1310 provide a ±5V input range with ±16.5V fault-tolerant inputs. The MAX1312/MAX1313/MAX1314 have a ±10V input range with ±16.5V fault-tolerant inputs. These ADCs convert two channels in 0.9μs, and up to eight channels in 1.98μs, with an 8-channel throughput of 456ksps per channel. Other features include a 20MHz T/H input bandwidth, internal clock, internal (+2.5V) or external (+2.0V to +3.0V) reference, and power-saving modes. A 20MHz, 12-bit, bidirectional parallel data bus provides the conversion results and accepts digital inputs that activate each channel individually. All devices operate from a +4.75V to +5.25V analog supply and a +2.7V to +5.25V digital supply and consume 57mA total supply current when fully operational. Each device is available in a 48-pin 7mm x 7mm LQFP package and operates over the extended -40°C to +85°C temperature range.
Feature
- Up to Eight Channels of Simultaneous Sampling
- 8ns Aperture Delay
- 100ps Channel-to-Channel T/H Match
- Extended Input Ranges
- 0 to +5V (MAX1304/MAX1305/MAX1306)
- -5V to +5V (MAX1308/MAX1309/MAX1310)
- -10V to +10V (MAX1312/MAX1313/MAX1314)
- Fast Conversion Time
- One Channel in 0.72μs
- Two Channels in 0.9μs
- Four Channels in 1.26μs
- Eight Channels in 1.98μs
- High Throughput
- 1075ksps/Channel for One Channel
- 901ksps/Channel for Two Channels
- 680ksps/Channel for Four Channels
- 456ksps/Channel for Eight Channels
- ±1 LSB INL, ±0.9 LSB DNL (max)
- 84dBc SFDR, -86dBc THD, 71dB SINAD, fIN = 500kHz at 0.4dBFS
- 12-Bit, 20MHz, 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
- 55mA Analog Supply Current
- 1.3mA Digital Supply Current
- Shutdown and Power-Saving Modes
- 48-Pin LQFP Package (7mm x 7mm Footprint)
Applications
- Multiphase Motor Control
- Multiphase Power Monitoring
- Power-Factor Monitoring
- Power-Grid Synchronization
- SIN/COS Position Encoder
- Vibration and Waveform Analysis
