Features: ·Low Power Quad 16 Bit DAC
·14-Lead TSSOP Package
·On-chip 1.25/2.5V, 10ppm/°C Reference
·Power-Down to 200 nA @ 5V, 50 nA @ 3V
·3V/5V Power Supply
·Guaranteed Monotonic by Design
·Power-On-Reset to Zero or Midscale
·Three Power-Down Functions
·Hardware /LDAC and /CLR functions
·SDO Daisy-Chaining Option
·Rail-to-Rail OperationApplication·ProcessControl
·Data Acquisition Systems
·Portable Battery Powered InstrumentsPinout
Specifications
| Resolution (Bits) |
16bit |
| DAC Update Rate |
95kSPS |
| DAC Settling Time |
6s |
| # DAC Outputs |
4 |
| DAC Type |
Voltage Out |
| DAC Input Format |
Ser,SPI |
| Output FSR |
(Uni 2Vref),(Uni Vref) |
| Ref Int/Ext |
Int/Ext |
| Supply Vnom |
Single(+2.7 to +5.5),Single(+2.7),Single(+3),Single(+3.3),Single(+5) |
| Pwr Diss |
12.5mW |
| Package |
SOP |
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
VDD to GND ...............................................-0.3 V to +7 V
Digital Input Voltage to GND.......... -0.3 V to VDD + 0.3 V
VOUT to GND.................................. -0.3 V to VDD + 0.3 V
Operating Temperature Range
Industrial (B Version)........................ -40°C to +105°C
Storage Temperature Range............. -65°C to +150°C
Junction Temperature (TJ Max) ..........................+150°C
TSSOP Package
Power Dissipation.................................... (TJ Max-TA)/JA
JA Thermal Impedance................................ 150.4°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec)........................................ +215°C
Infrared (15 sec)................................................ +220°C
DescriptionThe AD5666 DAC is a low power, quad, 16-bit buffered voltage-out DAC. The part operates from a single +2.7V to +5.5V, and is guaranteed monotonic by design.
The AD5666 has an on-chip reference with an internal gain of two. The AD5666-1 has a 1.25V 10ppm/°C max reference giving a fullscale output of 2.5V and the AD5666-2 has a 2.5V 10ppm/°C max reference giving a fullsclae output of 5V. The on-board reference is off at power-up allowing the use of an external reference. The internal reference is turned on by writing to the DAC.
The part incorporates a power-on-reset circuit that ensures that the DAC output powers up to zero volts (POR pin low) or midscale (POR pin high) and remains there until a valid write takes place. The part contains a power-down feature that reduces the current consumption of the device to 200nA at 5V and provides software selectable output loads while in powerdown mode for any or all DACs channels.
The outputs of all DACs may be updated simultaneously using theLDAC function, with the added functionality of user selectable DAC channels to simultaneously LDAC.
There is also an asynchronous active lowCLR that clears all DACs to a software selectable code - 0 V, midscale or fullscale .
The AD5666 utilizes a versatile three-wire serial interface that operates at clock rates up to 50 MHz and is compatible with standard SPI™, QSPI™, MICROWIRE™ and DSP interface standards. Its on-chip precision output amplifier allows rail-torail output swing to be achieved.
AD5666 Data Sheet
