12-bit, single-channel, programmable current output DAC for  4-20mA current loop applications - DAC7750

DAC7750 (ACTIVE)

12-bit, single-channel, programmable current output DAC for 4-20mA current loop applications

 

Description

The DAC7750 and DAC8750 are low-cost, precision, fully-integrated 12-bit and 16-bit digital-to-analog converters (DACs) designed to meet the requirements of industrial process-control applications. These devices can be programmed as a current output with a range of 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA. The DAC7750 and DAC8750 include reliability features such as CRC error checking on the serial peripheral interface (SPI™) frame, a watchdog timer, an open circuit, compliance voltage, and thermal alarm. In addition, the output current can be monitored by accessing an internal precision resistor.

These devices include a power-on-reset function to ensure that the device powers up in a known state (IOUT is disabled and in a Hi-Z state). The CLR terminal sets the current output to the low end of the range if the output is enabled. Program the zero and gain registers to digitally calibrate the device in the end system. The output slew rate is also programmable by register. These devices can superimpose an external HART® signal on the current output, and can operate with a 10-V to 36-V supply.

All versions are available in both 40-pin VQFN and 24-pin TSSOP packages.

Features

  • Current Output Options:
    • 0 mA to 24 mA
    • 4 mA to 20 mA
    • 0 mA to 20 mA
  • ±0.1% FSR Typical Total Unadjusted Error (TUE)
  • DNL: ±1 LSB Maximum
  • Max Loop Compliance Voltage: AVDD – 2 V
  • Internal 5-V Reference: 10 ppm/°C (Maximum)
  • Internal 4.6-V Power-Supply Output
  • CRC Frame Error Check
  • Watchdog Timer
  • Thermal Alarm
  • Open Circuit Alarm
  • Terminals to Monitor Output Current
  • On-Chip Fault Alarm
  • User-Calibration for Offset and Gain
  • Wide Temperature Range: –40°C to 125°C
  • 6-mm × 6-mm 40-Pin VQFN and 24-Pin HTSSOP
    Packages

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Parametrics Compare all products in Precision DAC with 4 to 20mA current output

 
Resolution (Bits)
DAC: Channels
Total Unadjusted Error (Max) (%FSR)
INL (Max) (+/-LSB)
Settling Time (µs)
Output Range Min. (mA)
Output Range Max. (mA)
Output Type
Interface
Reference: Type
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
Analog Supply (V) (Min)
Analog Supply (V) (Max)
DNL (Max) (+/-LSB)
Digital Supply (Min) (V)
Digital Supply (Max) (V)
Architecture
Gain Error (Max) (%FSR)
Power Consumption (Typ) (mW)
Full Scale Error (Max) (%FSR)
Offset Error (Max) (%)
DAC7750 DAC7760 DAC8750 DAC8760
12    12    16    16   
1    1    1    1   
0.1    0.1    0.1    0.1   
2    3    26    52   
10    10    10    10   
0    0    0    0   
24    24    24    24   
Current    Buffered Voltage
Current   
Current    Buffered Voltage
Current   
SPI    SPI    SPI    SPI   
Ext
Int   
Ext
Int   
Ext
Int   
Ext
Int   
Catalog    Catalog    Catalog    Catalog   
-40 to 125    -40 to 125    -40 to 125    -40 to 125   
24HTSSOP
40VQFN   
24HTSSOP
40VQFN   
40VQFN
24HTSSOP   
24HTSSOP
40VQFN   
2.49 | 1ku    2.99 | 1ku    3.49 | 1ku    3.99 | 1ku   
10    10    10    10   
36    36    36    36   
1    1    1    1   
2.7    2.7    2.7    2.7   
5.5    5.5    5.5    5.5   
String    String    String    String   
0.07    0.07    0.07    0.07   
135    135    135    135   
0.1    0.1    0.1    0.1   
0.1    0.1    0.1    0.1