LTC2758 Dual Serial 18-Bit SoftSpan IOUT DAC Datasheet and Application Circuit

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description

The LTC2758 is a dual 18-bit multiplying serial input, current output digital to analog converter. Complete 18-bit performance (±1LSB INL and DNL maximum) over the entire temperature range without any adjustments. All performance levels are guaranteed to be 18-bit monotonic. The SoftSpanTM DAC operates from a single 3V to 5V supply and offers six output ranges (up to ±10V) that can be set via a 3-wire SPI serial interface, or pin-bonded for use in one output range Operation.

The contents of any on-chip registers (including the DAC output range setpoint) can be read to complete verification in just one instruction cycle; and, if you change the contents of the registers, the changed registers will be in the next instruction cycle. It is automatically read back.

In addition, the device provides voltage-controlled offset and gain adjustment; moreover, both the power-on reset circuit and the CLR pin reset the DAC output to 0V, regardless of the output range.

Characteristics

Maximum 18-bit INL error: ±1LSB over temperature
Six output ranges are available through programming or pin-bonding: 0V to 5V, 0V to 10V, -2.5V to 7.5V, ±2.5V, ±5V, ±10V
Monotonic low-interference pulses are guaranteed over the entire temperature range: 0.4nV?s (3V), 2nV?s (5V)
18-bit settling time: 2.1μs
2.7V to 5.5V single supply operation
1μA maximum supply current voltage control type offset and gain trimming serial interface with all register readback functions cleared to 0V or power-on reset to 0V (this is independent of output range)
48-pin 7mm x 7mm LQFP package

application

Instrumentation medical equipment automatic test equipment process control and industrial automation

LTC2758 Typical Application Circuit

LTC2758 Typical Application Circuit

The above is part of the content, see the PDF data manual for more details!


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