AD7846 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

AD7846
Manufacturer

ADI
ChipWorker Part#

CW353145472
RoHS

Lead free / RoHS Compliant
Description

16Bit Voltage Output CMOS DAC
Documentation

Datasheet

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AD7846 Specifications

Attribute	Attribute Value

Part Number	AD7846
Manufacturer	ADI
ChipWorker Part#	CW353145472
Documentation	Datasheet
	expand all
Product Lifecycle Status	Unknown
RoHS	RoHS Compliant

Product Description

Product Details
The AD7846 is a 16-bit DAC constructed with the Analog Devices, Inc., LC2MOS process. It has VREF+ and VREF− reference inputs and an on-chip output amplifier. These can be configured to give a unipolar output range (0 V to +5 V, 0 V to +10 V) or bipolar output ranges (±5 V, ±10 V).
The DAC uses a segmented architecture. The four MSBs in the DAC latch select one of the segments in a 16-resistor string. Both taps of the segment are buffered by amplifiers and fed to a 12-bit DAC, which provides a further 12 bits of resolution. This architecture ensures 16-bit monotonicity. Excellent integral linearity results from tight matching between the input offset voltages of the two buffer amplifiers.
In addition to the excellent accuracy specifications, the AD7846 also offers a comprehensive microprocessor interface. There are 16 data I/O pins, plus control lines (CS, R/W, LDAC and CLR). R/W and CS allow writing to and reading from the I/O latch.
This is the readback function, which is useful in ATE applications. LDAC allows simultaneous updating of DACs in a multi-DAC system and the CLR line will reset the contents of the DAC latch to 00…000 or 10…000 depending on the state of R/W.
This means that the DAC output can be reset to 0 V in both the unipolar and bipolar configurations.
The AD7846 is available in 28-lead plastic, ceramic, and PLCC packages.
**Product Highlights**
1. 16-Bit Monotonicity
The guaranteed 16-bit monotonicity over temperature makes the AD7846 ideal for closed-loop applications.
2. Readback
The ability to read back the DAC register contents minimizes software routines when the AD7846 is used in ATE systems.
3. Power Dissipation
Power dissipation of 100 mW makes the AD7846 the lowest power, high accuracy DAC on the market.
### Features and Benefits
16-bit monotonicity over temperature
±2 LSBs integral linearity error
Microprocessor compatible with readback capability
Unipolar or bipolar output
Multiplying capability
Low power (100 mW typical)

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