ZHCSPG5 December 2021 DAC11001B
PRODUCTION DATA
The DAC11001B requires external references (REFPF and REFNF) to operate. See Section 6.3 for VREFPF and VREFNF voltage ranges.
The DAC11001B also contains dedicated sense pins, REFPS for REFPF and REFNS for REFNF. The reference pins are unbuffered; therefore, use a reference driver circuit for these pins. Set the VREFVAL bits (address 02h) as per a reference span equal to (VREFPF – VREFNF). For example, the VREFVAL bits must be set to 0100 for VREFPF = 5 V and VREFNF = –5 V.
Figure 7-1 shows an example reference drive circuit for the DAC11001B. Table 7-1 shows the op-amp options for the reference driver circuit.