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Texas Instruments ADS7827IDRBTG4
- Part No.:
- ADS7827IDRBTG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
ADS7827IDRBTG4.pdf
- Description:
- IC ADC 8BIT SAR 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:1,023
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Product details
Overview
ADS7827IDRBTG4 from Texas Instruments is an 8-bit, 250 kSPS successive approximation register (SAR) analog-to-digital converter with pseudo-differential rail-to-rail input, SPI-compatible serial interface, and micropower operation at 2.7 V supply. It features 1 LSB integral and differential linearity error, 3 µA max power-down current, and operates from 2.7 V to 5.25 V - ideal for battery-powered sensor front-ends in portable instrumentation.
For engineers reviewing the ADS7827IDRBTG4 datasheet, ADS7827IDRBTG4 pinout, ADS7827IDRBTG4 application, or ADS7827IDRBTG4 equivalent, key selection considerations include its 8-bit resolution at 250 kSPS throughput, ultra-low 260 µA quiescent current at full speed, 3 × 3 mm SON-8 package, and compatibility with external reference voltages as low as 50 mV.
Technical Context
The ADS7827IDRBTG4 implements a capacitive redistribution SAR architecture fabricated in 0.6 µm CMOS, integrating sample/hold functionality without external components. Its conversion cycle requires exactly 9 DCLOCK cycles and uses a synchronous 3-wire serial interface where data is clocked out MSB-first on DOUT's falling edge.
It supports pseudo-differential input with +In and –In pins, where –In is limited to –0.2 V to 1.0 V and serves primarily as remote ground sense. The device enters full power-down mode when CS/SHDN is high, reducing current to ≤3 µA while disabling both analog and digital sections.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes; LSB = VREF / 256 (e.g., 9.77 mV at 2.5 V reference) |
| Throughput Rate | 250 kSPS at VCC ≥ 2.7 V - enables real-time sampling of signals up to ~125 kHz Nyquist bandwidth |
| Integral Linearity Error | ±1 LSB - ensures monotonicity and <0.4% full-scale end-point error across temperature |
| Quiescent Current | 260 µA at full speed (250 kSPS, VCC = 2.7 V) - enables >1-year battery life in 10 µA average-power systems |
| Power-Down Current | 3 µA max - reduces system standby power by >98% versus active mode |
| Reference Voltage Range | 50 mV to VCC - allows direct use of low-voltage references (e.g., 1.024 V, 1.25 V) without level-shifting |
| Supply Voltage Range | 2.7 V to 5.25 V - supports single-supply operation from Li-ion (3.0–4.2 V) or 5 V rails |
Pinout & Package
ADS7827IDRBTG4 is housed in an 8-pin 3 × 3 mm PDSO (SON) package - same footprint as QFN - with wettable flanks for automated optical inspection. Thermal pad is not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VREF | Reference voltage input | Accepts external reference from 50 mV to VCC; sets full-scale input span (+In − −In) |
| 2 +IN | Noninverting analog input | Rail-to-rail capable; absolute range: −0.2 V to VCC + 0.2 V |
| 3 −IN | Inverting analog input | Limited to −0.2 V to 1.0 V; used for remote ground sensing or common-mode rejection |
| 4 GND | Analog/digital ground | Single ground pin; requires low-impedance connection to minimize noise coupling |
| 5 CS/SHDN | Chip select / shutdown control | Active-low CS initiates conversion; HIGH places device in full power-down mode |
| 6 DOUT | Serial data output | CMOS output (0 V to VCC); outputs 8-bit MSB-first data after null bit on falling DCLOCK edges |
| 7 DCLOCK | Serial interface clock | Asynchronous input; min 10 kHz, max 3 MHz; conversion timing locked to falling edge |
| 8 +VCC | Power supply | Supports 2.7–5.25 V; internal regulation not provided - requires local 0.1 µF bypass |
Key Features
| Feature | Design Value |
|---|---|
| MicroPower Auto Power-Down | Consumes ≤3 µA in shutdown - enables energy harvesting and wake-on-event architectures |
| SPI-Compatible Serial Interface | 3-wire synchronous protocol (CS, DCLOCK, DOUT) - interoperable with standard MCU SPI peripherals without glue logic |
| Pseudo-Differential Input | +In/−In topology rejects small common-mode shifts (e.g., ground bounce in remote sensors) without requiring matched drivers |
| Rail-to-Rail Input Range | +In accepts signals from GND to VCC - maximizes dynamic range when using single-supply op-amp front-ends |
| Ultra-Small 3 × 3 mm SON Package | 8-pin wettable flank SON - enables high-density PCB layouts in space-constrained IoT nodes and wearables |
Applications
| Portable Medical Sensors | Industrial Remote Monitoring |
|---|---|
|
Use Scenario: Continuous glucose monitor (CGM) with disposable patch housing analog front-end and BLE radio. IC Role / Device Role / Timing Role: ADC digitizes amplified electrochemical sensor output at 100–200 SPS; powers down between samples to extend coin-cell life. Use Value: 260 µA active current and 3 µA shutdown enable >18-month battery life; 8-bit resolution suffices for calibrated biosignal amplitude tracking. |
Use Scenario: Wireless vibration sensor node mounted on motor housing, transmitting FFT bins via LoRaWAN. IC Role / Device Role / Timing Role: Digitizes conditioned accelerometer signal at 250 kSPS for time-domain capture prior to onboard FFT processing. Use Value: 250 kSPS throughput supports 125 kHz Nyquist bandwidth; pseudo-differential input rejects EMI-induced ground shift in noisy factory environments. |
| Battery-Powered Data Loggers | Isolated Analog Inputs |
|
Use Scenario: Environmental logger recording temperature, humidity, and light intensity every 10 seconds using solar-charged LiPo. IC Role / Device Role / Timing Role: Simultaneously samples multiple sensor outputs via external multiplexer; enters shutdown between conversions. Use Value: Wide 2.7–5.25 V supply range accommodates variable battery voltage; 50 mV–VCC reference flexibility allows direct use of low-dropout voltage references. |
Use Scenario: PLC analog input module with optocoupled or transformer-isolated signal paths feeding microcontroller ADC inputs. IC Role / Device Role / Timing Role: Local ADC placed on isolated side to avoid routing analog signals across isolation barrier. Use Value: Small 3 × 3 mm SON package fits within tight isolation creepage/clearance constraints; CMOS-level DOUT compatible with isolated digital interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7826IDRBTG4 | 10-bit resolution, 200 kSPS, 11-cycle conversion time, ±1 LSB INL | Higher resolution required for precision thermistor or RTD measurements where 8-bit quantization noise is unacceptable | Select when 10-bit accuracy is mandatory and 50 kSPS lower throughput is acceptable |
| MCP3001-I/P | 10-bit, 200 kSPS, SPI interface, 2.7–5.5 V supply, but no power-down mode and larger PDIP-8 package | Legacy through-hole designs or prototyping where board rework for SON is impractical | Choose only for socket-based evaluation; lacks micropower shutdown and compact footprint of ADS7827IDRBTG4 |
Compared with ADS7826IDRBTG4, the ADS7827IDRBTG4 trades 2 bits of resolution for 50 kSPS higher throughput and identical linearity - favoring speed-critical sensor sampling. Against MCP3001-I/P, it delivers 3 µA shutdown, 3×3 mm size, and guaranteed 2.7 V operation - essential for modern battery-constrained systems.
Availability
ADS7827IDRBTG4 is available at Aetrix Electronics and suitable for portable medical sensors, industrial remote monitoring, battery-powered data loggers, and isolated analog inputs requiring stable component supply with long-term manufacturability.
Supply support for ADS7827IDRBTG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision data converters and low-power design.
The ADS7826/27/29 family was engineered for ultra-low-power, high-speed sampling in space- and energy-constrained systems - targeting portable instrumentation, remote sensing, and battery-operated industrial endpoints.
FAQ
What is the maximum DCLOCK frequency supported by ADS7827IDRBTG4?
The ADS7827IDRBTG4 supports a maximum DCLOCK frequency of 3 MHz, enabling its full 250 kSPS throughput. At this rate, each conversion completes in 9 DCLOCK cycles (tCONV), and the total cycle time is 12 DCLOCK periods. Operation above 3 MHz is not characterized and may result in invalid conversions or increased missing-code probability.
Does ADS7827IDRBTG4 require an external reference voltage?
Yes, ADS7827IDRBTG4 requires an external reference voltage applied to the VREF pin. It accepts any stable voltage from 50 mV to VCC, and the full-scale input range is defined as (+In − −In) = VREF. No internal reference is provided; bypassing VREF with a 0.1 µF capacitor is mandatory for noise-sensitive applications.
Can ADS7827IDRBTG4 operate from a 2.0 V supply?
ADS7827IDRBTG4 is specified for operation from 2.7 V to 5.25 V. While absolute maximum ratings allow 2.0 V, TI does not guarantee performance below 2.7 V - including linearity, throughput, and power-down current. At 2.0 V, maximum sample rate drops to 100 kSPS and reference range narrows to 1.024–1.25 V per datasheet Section 3.
What is the purpose of the −In pin on ADS7827IDRBTG4?
The −In pin on ADS7827IDRBTG4 serves as the inverting input for pseudo-differential operation. Its voltage range is restricted to −0.2 V to 1.0 V, making it suitable for remote ground sensing or rejecting small common-mode offsets - not for true differential signal acquisition. It is not resampled during conversion and must remain stable during sampling.
How does the power-down mode function on ADS7827IDRBTG4?
ADS7827IDRBTG4 enters full power-down mode when CS/SHDN is driven HIGH, reducing total supply current to ≤3 µA. In this state, both analog circuitry (S/H, comparator, DAC) and digital logic (serial interface) are disabled. Conversion resumes only after CS/SHDN transitions LOW, followed by a valid DCLOCK sequence.
ADS7827IDRBTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SON (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7827IDRBTG4 FAQ
1.How can I place an order for ADS7827IDRBTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7827IDRBTG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADS7827IDRBTG4 reliable?
The price and inventory of ADS7827IDRBTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7827IDRBTG4 is usually 5 days.
3.What payment methods are accepted for ADS7827IDRBTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7827IDRBTG4 transactions.
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4.How is shipping managed for ADS7827IDRBTG4?
ADS7827IDRBTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7827IDRBTG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADS7827IDRBTG4?
For technical support, including ADS7827IDRBTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7827IDRBTG4 requirements.
6.How does Aetrix verify that ADS7827IDRBTG4 is sourced from the original manufacturer or authorized distributors?
All ADS7827IDRBTG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS7827IDRBTG4 meets industry standards.
7.What is the process for return or replacement of ADS7827IDRBTG4?
All ADS7827IDRBTG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7827IDRBTG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADS7827IDRBTG4 part is unused and in its original packaging.
Return procedure for ADS7827IDRBTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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