AD7793BRU-REEL
Sigma-Delta ADCThe AD7793BRU-REEL is a sigma-delta adc from Analog Devices. View the full AD7793BRU-REEL datasheet below including key specifications.
AD7793BRU-REEL shares its datasheet with AD7793, whose page lists every part number it covers.
Official AD7793BRU-REEL datasheet (PDF) — the source this page was extracted from.
AD7793BRU-REEL Key Specifications
| Parameter | Value |
|---|---|
| Interface | SPI, QSPI, MICROWIRE, DSP compatible |
| RMS Noise | 40 nV @ 4.17 Hz; 85 nV @ 16.7 Hz |
| Resolution | 24 bits (up to 23 bits effective) |
| Update Rate | 4.17 Hz to 470 Hz |
| Analog Inputs | 3 differential |
| Supply Current | 400 µA typical |
| Supply Voltage | 2.7V to 5.25V |
| Programmable Gain | Low noise instrumentation amplifier (gain up to 64) |
| Power-Down Current | 1 µA maximum |
| Operating Temperature | -40°C to +105°C |
| Internal Reference Drift | 4 ppm/°C typical |
AD7793BRU-REEL Overview
Part: AD7793BRUZ — Analog Devices
Type: 24-bit Sigma-Delta ADC (3-channel, with on-chip in-amp and reference)
Description: 2.7–5.25 V, 3-channel differential, low noise 24-bit ∑-Δ ADC with on-chip instrumentation amplifier and 1.17 V band gap reference, 400 μA typical supply current, 40 nV rms noise at 4.17 Hz, in a 16-lead TSSOP.
Operating Conditions:
- Supply voltage: AVDD and DVDD 2.7–5.25 V
- Operating temperature: -40 to +105 °C
- Output update rate: 4.17 to 470 Hz
Absolute Maximum Ratings:
- AVDD to GND: -0.3 V to +7 V
- DVDD to GND: -0.3 V to +7 V
- Analog/reference input voltage to GND: -0.3 V to AVDD + 0.3 V
- Digital input/output voltage to GND: -0.3 V to DVDD + 0.3 V
- AIN/digital input current: 10 mA
- Maximum junction temperature (TSSOP): 150 °C
- Storage temperature: -65 to +150 °C
Key Specs:
- Resolution: 24 bits no missing codes (AD7793, fADC < 242 Hz)
- RMS noise: 40 nV at 4.17 Hz, 85 nV at 16.7 Hz (gain 64)
- Supply current: 400 μA typical; power-down 1 μA maximum
- Internal reference: 1.17 V ±0.01% initial accuracy (AVDD = 4 V, TA = 25 °C); drift 4 ppm/°C typical, 15 ppm/°C max
- Integral nonlinearity: ±15 ppm of FSR typical
- Excitation current sources: 10/210/1000 μA nominal, ±5% initial tolerance typical, 200 ppm/°C drift typical
- External reference: 2.5 V nominal; range 0.1 V to AVDD
- Analog input current (buffered mode or in-amp active): ±1 nA max
- Common-mode rejection at DC: 100 dB min (gain ≥ 4)
- θJA: 128 °C/W; θJC: 14 °C/W
Features:
- Up to 23 bits effective resolution
- Low noise programmable gain instrumentation amplifier
- Band gap reference with 4 ppm/°C typical drift
- 3 differential inputs
- Internal clock oscillator
- Simultaneous 50 Hz/60 Hz rejection
- Programmable excitation current sources
- On-chip bias voltage generator
- Burnout currents
- Independent interface power supply
- SPI, QSPI, MICROWIRE and DSP compatible 3-wire serial interface with Schmitt trigger on SCLK
Applications:
- Thermocouple, RTD and thermistor measurements
- Gas analysis
- Industrial process control
- Instrumentation and portable instrumentation
- Blood analysis
- Smart transmitters
- Liquid/gas chromatography
- 6-digit DVM
Package:
- 16-lead TSSOP (RU-16)
AD7793BRU-REEL Features
Up to 23 bits effective resolution
RMS noise
40 nV @ 4.17 Hz
85 nV @ 16.7 Hz
Current: 400 μA typical
Power-down: 1 μA maximum
Low noise programmable gain instrumentation amp
Band gap reference with 4 ppm/°C drift typical
Update rate: 4.17 Hz to 470 Hz
3 differential inputs
Internal clock oscillator
Simultaneous 50 Hz/60 Hz rejection
Programmable current sources
On-chip bias voltage generator
Burnout currents
Power supply: 2.7 V to 5.25 V
-40°C to +105°C temperature range Independent interface power supply 16-lead TSSOP package
Interface
SPI®, QSPI™, MICROWIRE™, and DSP compatible
3-wire serial Schmitt trigger on SCLK
AD7793BRU-REEL Applications
Thermocouple measurements RTD measurements Thermistor measurements Gas analysis Industrial process control Instrumentation Portable instrumentation Blood analysis Smart transmitters Liquid/gas chromatography 6-digit DVM
AD7793BRU-REEL Pin Configuration
Figure 5. Pin Configuration
Table 4. Pin Function Descriptions
| Pin No. | Mnemonic | Description |
|---|---|---|
| 1 | SCLK | Serial Clock Input. This serial clock input is for data transfers to and from the ADC. The SCLK has a Schmitt- triggered input, making the interface suitable for opto-isolated applications. The serial clock can be continuous with all data transmitted in a continuous train of pulses. Alternatively, it can be a noncontinuous clock with the information being transmitted to or from the ADC in smaller batches of data. |
| 2 | CLK | Clock In/Clock Out.The internal clock can be made available at this pin. Alternatively, the internal clock can be disabled, and the ADC can be driven by an external clock. This allows several ADCs to be driven from a common clock, allowing simultaneous conversions to be performed. |
| 3 | CS | Chip Select Input. This is an active low logic input used to select the ADC. CS can be used to select the ADC in systemswithmorethan onedevice onthe serial bus or as a frame synchronization signal in communicating with the device. CS can be hardwired low, allowing the ADC to operate in 3-wire mode with SCLK, DIN, and DOUT used to interface with the device. |
| 4 | IOUT1 | Output of Internal Excitation Current Source. The internal excitation current source can be made available at this pin. The excitation current source is programmable so that the current can be 10 μA, 210 μA, or 1 mA. Either IEXC1 or IEXC2 can be switched to this output. |
| 5 | AIN1(+) | Analog Input. AIN1(+) is the positive terminal of the differential analog input pair AIN1(+)/AIN1( - ). |
| 6 | AIN1( - ) | Analog Input. AIN1( - ) is the negative terminal of the differential analog input pair AIN1(+)/AIN1( - ). |
| 7 | AIN2(+) | Analog Input. AIN2(+) is the positive terminal of the differential analog input pair AIN2(+)/AIN2( - ). |
| 8 | AIN2( - ) | Analog Input. AIN2( - ) is the negative terminal of the differential analog input pair AIN2(+)/AIN2( - ). |
| 9 | REFIN(+)/AIN3(+) | Positive Reference Input/Analog Input. An external reference can be applied between REFIN(+) and REFIN( - ). REFIN(+) can lie anywhere between AV DD and GND+0.1V.The nominal reference voltage REFIN(+) - REFIN( - ) is 2.5 V, but the part functions with a reference from 0.1V to AV DD . Alternatively, this pin can function as AIN3(+) whereAIN3(+) is the positive terminal of the differential analog input pair AIN3(+)/AIN3( - ). |
| 10 | REFIN( - )/AIN3( - ) | Negative Reference Input/Analog Input. REFIN( - ) is the negative reference input for REFIN. This reference input can lie anywhere between GNDand AV DD - 0.1 V. This pin also functions as AIN3( - ), which is the negative terminal of the differential analog input pair AIN3(+)/AIN3( - ). |
| 11 | IOUT2 | Output of Internal Excitation Current Source. The internal excitation current source can be made available at this pin. The excitation current source is programmable so that the current can be 10 μA, 210 μA, or 1 mA. Either IEXC1 or IEXC2 can be switched to this output. |
| 12 | GND | Ground Reference Point. |
| 13 | AV DD | Supply Voltage, 2.7V to 5.25 V. |
| 14 | DV DD | Digital Interface Supply Voltage. The logic levels for the serial interface pins are related to this supply, which is between 2.7V and 5.25 V. The DV DD voltage is independent of the voltage on AV DD ; therefore, AV DD can equal 5V with DV DD at 3V or vice versa. |
| Pin No. | Mnemonic | Description |
|---|---|---|
| 15 | DOUT/RDY | Serial Data Output/Data Ready Output. DOUT/RDY serves a dual purpose. It functions as a serial data output pin to access the output shift register of the ADC. The output shift register can contain data from any of the on-chip data or control registers. In addition, DOUT/RDY operates as a data ready pin, going low to indicate the completion of a conversion. If the data is not read after the conversion, the pin goes high before the next update occurs. The DOUT/RDY falling edge can be used as an interrupt to a processor, indicating that valid data is available. With an external serial clock, the data can be read using the DOUT/RDY pin. With CS low, the data/control word information is placed on the DOUT/RDY pin on the SCLK falling edge and is valid on the SCLK rising edge. |
| 16 | DIN | Serial Data Input. This serial data input is to the input shift register on the ADC. Data in this shift register is transferred to the control registers within the ADC; the register selection bits of the communications register identify the appropriate register. |
Variants on the same datasheet
These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.
| Part Number | Manufacturer | Package |
|---|---|---|
| AD7792 | Analog Devices | TSSOP-16 |
| AD7793 | Analog Devices | — |
| AD7793B | Analog Devices | TSSOP-16 |
| AD7793BRU | Analog Devices | 16-LeadTSSOP |
| AD7793BRUZ | Analog Devices | TSS |
| AD7793BRUZ-REEL | Analog Devices | 16-LeadTSSOP |
Other ADC / DAC
- ADS1115 – Texas Instruments, Analog-to-Digital Converter
- AD5065 – Analog Devices, Digital-to-Analog Converter
- AD5671R – Analog Devices, Digital-to-Analog Converter (DAC)
- AD5675R – Analog Devices, Digital-to-Analog Converter (DAC)
- AD5675RACPZ-REEL7 – Analog Devices, Digital-to-Analog Converter (DAC)
- AD5675RACPZ-RL – Analog Devices, Digital-to-Analog Converter (DAC)
- AD5675RARUZ – Analog Devices, Digital-to-Analog Converter (DAC)
- AD5675RARUZ-REEL7 – Analog Devices, Digital-to-Analog Converter (DAC)
Ask your AI agent about the AD7793BRU-REEL
Connect SheetsData to Claude, Cursor, Codex or any MCP client and your agent reads this datasheet for you: pinout, limits, register maps and design checks, with the numbers taken from the PDF.
claude mcp add --transport http sheetsdata https://mcp.sheetsdata.com/mcp
Then ask: "Can the AD7793BRU-REEL run from my 12 V rail? Check it against the datasheet limits."
Create a free account $2 of usage every month, no card needed.