| DAC type | Quad 10-bit voltage-output DAC |
| Slew rate | 2.5 V/µs typ |
| Gain error | ±3% FSR max |
AD7804BN представляет собой четырёхканальный 10-разрядный ЦАП с последовательным интерфейсом и встроенным опорным источником напряжения 1.23 V.
Он рассчитан на питание от однополярного источника 3.3 V до 5.5 V с разделением аналоговой и цифровой земли.
Устройство выполнено по КМОП‑технологии с низким энергопотреблением и поддержкой режимов понижения мощности и ожидания.
Каждая из четырёх основных секций включает 10‑битовый основной ЦАП и 8‑битовый подстроечный Sub DAC для точной подстройки смещения относительно VBIAS.
ЦАП поддерживает кодирование twos complement и offset binary, а также одновременное обновление всех каналов через вход LDAC.
| DAC type | Quad 10-bit voltage-output DAC |
| Slew rate | 2.5 V/µs typ |
| Gain error | ±3% FSR max |
| Resolution | 10 bit (main DAC), 8 bit (Sub DAC) |
| Output type | Voltage output, VBIAS ± VSwing |
| Part number | AD7804BN |
| Architecture | Voltage-output DAC with main DAC + Sub DAC, all CMOS |
| Input coding | Twos complement / Offset binary (selectable) |
| Manufacturer | Analog Devices, Inc. |
| Monotonicity | 9 bit (AD7804 B grade) |
| Package type | 16-Lead Plastic DIP (N-16) |
| REFOUT error | ±8% max |
| Power-on reset | Yes, internal power-on reset circuitry |
| Reference type | On-chip bandgap reference |
| Software clear | System clear (SCLR) and per-channel CLR bits |
| ESD sensitivity | ESD sensitive device, proprietary protection, no level specified |
| VBIAS selection | VDD/2, INTERNAL VREF, REFIN (via MX1, MX0) |
| AVDD, DVDD range | 3 V to 5.5 V |
| Analog crosstalk | ±0.2 LSB typ |
| Zero-scale error | ±35 mV max (DAC code = 000H offset binary / 200H twos complement) |
| Bias offset error | ±60 mV max (DAC code = 0.5 full scale) |
| CLKIN low time t3 | 40 ns min |
| Data hold time t6 | 5 ns min |
| Digital crosstalk | 0.5 nV-s typ |
| FSIN hold time t7 | 90 ns max / 20 ns min |
| Power supply type | +3.3 V to +5 V single supply (AVDD and DVDD) |
| CLKIN high time t2 | 40 ns min |
| Data setup time t5 | 30 ns min |
| FSIN setup time t4 | 30 ns min |
| LDAC hold time t6A | 6 ns min |
| LDAC setup time t9 | 100 ns min |
| Number of channels | 4 |
| CLKIN cycle time t1 | 100 ns min |
| DC output impedance | 2 Ω typ |
| Digital feedthrough | 0.5 nV-s typ |
| Per-channel standby | Yes (STBY bit in channel control register) |
| Simultaneous update | All DACs updated via LDAC low |
| System standby mode | Yes (SSTBY, all DACs, reference active) |
| Hardware clear input | CLR pin, clears main DAC outputs |
| Serial interface type | FSIN, CLKIN, SDIN, LDAC (serial input device) |
| Minimum load resistance | 2 kΩ min |
| REFOUT output impedance | 5 kΩ nom |
| LDAC, CLR pulse width t8 | 40 ns min |
| Digital input capacitance | 8 pF max |
| Storage temperature range | -65°C to +150°C |
| Junction temperature (max) | +150°C |
| Operating temperature range | -40°C to +85°C |
| REFIN input leakage current | ±1 µA max (typically ±1 nA) |
| Voltage output settling time | 4 µs max to 10 bits (typically 1.5 µs) |
| Digital input leakage current | ±10 µA max |
| Reference input range (REFIN) | 1.0 V to VDD/2 V |
| Internal VDD/2 node (COMP pin) | VDD/2 output for bypass or external overdrive |
| REFOUT temperature coefficient | -100 ppm/°C typ |
| Digital-to-analog glitch impulse | 1 nV-s typ (1 LSB change around major carry) |
| Relative accuracy (INL, main DAC) | ±4 LSB max (B grade) |
| Thermal impedance θJA (N-16 PDIP) | 116°C/W |
| System standby current (SSTBY mode) | 250 µA max |
| Power-down current (PD mode) at +25°C | 1 µA max |
| Power dissipation (normal mode, AD7804) | 99 mW max (excluding load) |
| Power dissipation (system standby mode) | 1.38 mW max |
| Absolute maximum ratings – AGND to DGND | -0.3 V to +0.3 V |
| Absolute maximum ratings – AVDD to AGND | -0.3 V to +7 V |
| Absolute maximum ratings – DVDD to DGND | -0.3 V to +7 V |
| Absolute maximum ratings – VOUT to AGND | -0.3 V to AVDD + 0.3 V |
| Digital input low voltage VIL @ VDD = 5 V | 0.8 V max |
| Supply current (IDD, normal mode, AD7804) | 18 mA max (AIDD plus DIDD, excluding load currents) |
| Absolute maximum ratings – REFIN to AGND | -0.3 V to AVDD + 0.3 V |
| Digital input high voltage VIH @ VDD = 5 V | 2.4 V min |
| Internal reference output voltage (REFOUT) | 1.23 V nom |
| Absolute maximum ratings – REFOUT to AGND | -0.3 V to AVDD V |
| Digital input low voltage VIL @ VDD = 3.3 V | 0.6 V max |
| Output voltage range (offset binary coding) | VBIAS/16 to 31/16 × VBIAS V |
| Package power dissipation limit (N-16 PDIP) | 670 mW |
| Digital input high voltage VIH @ VDD = 3.3 V | 2.1 V min |
| Output voltage range (twos complement coding) | VBIAS ± 15/16 × VBIAS V |
| Power dissipation (power-down mode) at +25°C | 5.5 µW max |
| Power-down current (PD mode) over TMIN–TMAX | 3 µA max |
| Input current to any pin except supplies (abs max) | ±10 mA |
| Absolute maximum ratings – Analog input voltage to AGND | -0.3 V to AVDD + 0.3 V |
| Absolute maximum ratings – Digital input voltage to DGND | -0.3 V to DVDD + 0.3 V |
Предлагаем ЦАП Analog Devices AD7804BN, 10-разрядный, четырёхканальный, последовательная загрузка на выгодных условиях с полной технической поддержкой. Проверим наличие, поможем подобрать аналог.
Получить коммерческое предложение или оформить заказ:
8 800 301-96-04 info@fregat.ru
Для разработчиков новой продукции возможен заказ образца!
