| Mounting | Surface-mount |
| Pin count | 28 |
| Slew rate | 2.5 V/µs typ |
Микросхема AD7805BRZ-REEL представляет собой четырёхканальный 10-разрядный ЦАП с параллельным интерфейсом.
Устройство работает от однополярного питания +3.3 V…+5 V с допуском ±10%.
ЦАП содержит встроенный опорный источник на 1.23 V и делитель VDD/2.
Выходной сигнал каждого канала формируется относительно VBIAS в виде VBIAS ± VSWING.
Реализованы режимы понижения энергопотребления, системный и поканальный standby, а также функции аппаратного и программного сброса выходов.
Все ЦАП-каналы имеют двухкаскадную буферизацию регистров и могут одновременно обновляться по сигналу LDAC.
| Mounting | Surface-mount |
| Pin count | 28 |
| Slew rate | 2.5 V/µs typ |
| Resolution | 10 bit |
| Part number | AD7805BRZ-REEL |
| Architecture | Voltage-output DAC with Main DAC and Sub DAC per channel |
| Manufacturer | Analog Devices, Inc. |
| Package type | 28-Lead SOIC (Wide) R-28 |
| REF IN range | 1.0 to VDD/2 V |
| REF OUT error | ±8% |
| Interface type | Parallel |
| Power-on reset | Implemented |
| Analog crosstalk | ±0.2 LSB typ |
| Digital crosstalk | 0.5 nV-s typ |
| Sub DAC resolution | 8 Bits |
| DC output impedance | 2 Ω typ |
| Digital feedthrough | 0.5 nV-s typ |
| Main DAC gain error | ±3% FSR max |
| Digital input coding | Twos Comp/Binary |
| Junction temperature | +150°C |
| REF IN input leakage | ±1 µA max |
| Default power-up state | Standby mode with reference active |
| Number of DAC channels | 4 |
| On-chip reference type | Bandgap reference |
| REF OUT output voltage | 1.23 V |
| Minimum load resistance | 2 kΩ min |
| Sub DAC resolution step | 1/8 LSB of Main DAC |
| LDAC, CLR pulsewidth t11 | 40 ns min |
| REF OUT output impedance | 5 kΩ nom |
| Sub DAC adjustment range | ±VBIAS/32 V |
| System control functions | Power Down, System Standby, System Clear, Coding select |
| Channel control functions | Channel Standby, Channel Clear, VBIAS multiplexer select |
| Digital input capacitance | 8 pF max |
| Storage temperature range | -65°C to +150°C |
| Operating temperature range | -40°C to +85°C |
| System standby output state | Outputs connected through high impedance to ground |
| Power supply rejection ratio | 0.002%/% typ |
| Write to LDAC setup time t12 | 100 ns min |
| Absolute maximum VOUT to AGND | -0.3 V to AVDD + 0.3 V |
| Digital input leakage current | ±10 µA max |
| Main DAC monotonicity (B grade) | 9 Bits |
| Main DAC monotonicity (C grade) | 10 Bits |
| REF OUT temperature coefficient | -100 ppm/°C typ |
| Digital-to-analog glitch impulse | 1 nV-s typ |
| Reference options via multiplexer | VDD/2, INTERNAL VREF, REFIN |
| Sub DAC differential nonlinearity | ±0.125 LSB typ |
| System standby mode supply current | 250 µA max |
| Thermal impedance θJA SOIC (R-28) | 70°C/W |
| Main DAC bias offset error (B grade) | ±60 mV max |
| Main DAC bias offset error (C grade) | -80/+40 mV max |
| Main DAC relative accuracy (B grade) | ±3 LSB max |
| Main DAC relative accuracy (C grade) | ±3 LSB max |
| Absolute maximum voltage AVDD to AGND | -0.3 V to +7 V |
| Absolute maximum voltage DVDD to DGND | -0.3 V to +7 V |
| Power dissipation system standby mode | 1.38 mW max |
| Power dissipation normal mode (B grade) | 99 mW max |
| Power dissipation normal mode (C grade) | 66 mW max |
| Voltage output settling time to 10 Bits | 4 µs max |
| Supply voltage range VDD (AVDD and DVDD) | 3/5.5 V |
| Digital input low voltage VIL @ VDD = 5 V | 0.8 V max |
| Digital input high voltage VIH @ VDD = 5 V | 2.4 V min |
| Parallel write minimum write pulsewidth t9 | 40 ns min |
| 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 |
| Digital input high voltage VIH @ VDD = 3.3 V | 2.1 V min |
| Absolute maximum analog input voltage to AGND | -0.3 V to AVDD + 0.3 V |
| Output voltage range (Twos Complement Coding) | VBIAS ± 15/16 × VBIAS V |
| Absolute maximum digital input voltage to DGND | -0.3 V to DVDD + 0.3 V |
| Normal mode supply current (AIDD + DIDD) B grade | 18 mA max |
| Normal mode supply current (AIDD + DIDD) C grade | 12 mA max |
| Power-down mode supply current at +25°C (B grade) | 1 µA max |
| Power-down mode supply current at +25°C (C grade) | 0.8 µA max |
| Power-down mode supply current TMIN–TMAX (B grade) | 3 µA max |
| Power-down mode supply current TMIN–TMAX (C grade) | 1.5 µA max |
| Power dissipation power-down mode at +25°C (B grade) | 5.5 µW max |
| Power dissipation power-down mode at +25°C (C grade) | 4.4 µW max |
| Power dissipation power-down mode TMIN–TMAX (B grade) | 16.5 µW max |
| Power dissipation power-down mode TMIN–TMAX (C grade) | 8.25 µW max |
| Parallel write minimum time between successive writes t10 | 100 ns min |
Предлагаем ЦАП Analog Devices AD7805BRZ-REEL, 10-разрядный, четырёхканальный, параллельный на выгодных условиях с полной технической поддержкой. Проверим наличие, поможем подобрать аналог.
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