My Inquiry
My Account
Texas Instruments ADS774KEG4
- Part No.:
- ADS774KEG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-DIP (0.300", 7.62mm)
- Datasheet:
-
ADS774KEG4.pdf
- Description:
- IC ADC 12BIT SAR 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,616
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS774KEG4 from Burr-Brown (now Texas Instruments) is a 12-bit successive approximation analog-to-digital converter with integrated sampling, internal 2.5V reference, microprocessor interface, and single +5V supply operation. It delivers 8.5µs max conversion time over temperature, supports ±10V/±5V/0–10V/0–20V input ranges, and eliminates external sample/hold in most applications. Used in industrial data acquisition systems requiring high-speed, low-power precision conversion.
For engineers reviewing the ADS774KEG4 datasheet, ADS774KEG4 pinout, ADS774KEG4 application, or ADS774KEG4 equivalent, key selection considerations include its guaranteed ±1/2 LSB linearity error at 0°C to +70°C, 70 dB SINAD, 28-pin 0.3" plastic DIP package, and drop-in compatibility with ADC574/ADC674/ADC774 in emulation mode.
Technical Context
The ADS774KEG4 implements charge-redistribution successive approximation using a laser-trimmed capacitor array (CDAC) in low-power CMOS. It integrates internal clock, three-state parallel output buffers, and scaling resistors for multiple input ranges - enabling direct connection to ±10V sensors or 0–20V industrial signals without external gain/level-shifting.
It operates in two distinct modes: S/H Control Mode (VEE = +5V), where convert command initiates simultaneous sampling and conversion with 1.4µs settling time; and ADC774 Emulation Mode (VEE = –15V), where it replicates legacy timing with 1.6µs aperture delay and drop-in socket replacement capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees no missing codes and full-scale digital word resolution for precision measurement systems. |
| Conversion Time | 8.5 µs max over temperature - enables 117 kHz sustained sampling rate for real-time control loop feedback. |
| DC Accuracy | ±1/2 LSB linearity error - ensures monotonic transfer function critical for closed-loop servo positioning. |
| SINAD | 70 dB at +25°C - supports accurate digitization of 11-bit effective resolution signals in noisy industrial environments. |
| Input Ranges | ±10V, ±5V, 0–10V, 0–20V - selectable via external resistor networks, eliminating need for external signal conditioning amplifiers. |
| Supply | +5V only required (VEE optional) - simplifies power design and reduces BOM count versus ±15V legacy ADCs. |
| Package | 28-pin 0.3" wide plastic DIP - compatible with standard through-hole PCB assembly and legacy ADC774 sockets. |
Pinout & Package
ADS774KEG4 is housed in a 28-pin 0.3" wide plastic DIP (Package Drawing #246). Pin functions are validated per Burr-Brown PDS-1109F datasheet and confirmed on official TI legacy documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Positive Supply | +5V main power rail; no +15V required - reduces system power complexity. |
| 5 (R/C) | Read/Convert Control | Falling edge initiates conversion; rising edge enables data read - dual-function TTL/CMOS-compatible timing control. |
| 6 (CE) | Chip Enable | Active-high enable for conversion start or data read - allows multiplexed bus sharing with other peripherals. |
| 11 (VEE) | Mode Selection Input | Logic-level input: –15V selects ADC774 Emulation Mode; +5V selects S/H Control Mode - no current draw, immune to supply ripple. |
| 13 (10V Range) | Unipolar Range Select | Connect to analog common for 0–10V/±5V operation; leave open for 0–20V/±10V - configures internal scaling resistors. |
| 14 (20V Range) | Unipolar Range Select | Connect to analog common for 0–20V/±10V operation; leave open for 0–10V/±5V - mutually exclusive with Pin 13. |
| 16–27 (DB0–DB11) | Parallel Data Output | Three-state CMOS outputs; configurable for 12-bit parallel or 8-bit byte-wide transfer - interfaces directly to 8-bit or 16-bit microprocessor buses. |
| 28 (STATUS) | Conversion Status Flag | Active-high during conversion; falls when data is latched and valid - provides hardware-ready handshake for interrupt-driven reads. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Sample/Hold | Eliminates external S/H amplifier in >90% of industrial DAQ designs - reduces component count, board area, and signal path noise. |
| Internal 2.5V Reference | ±0.1V tolerance, 0.5mA source capability - enables ratiometric measurements and removes need for precision external reference ICs. |
| Microprocessor Interface | Five TTL/CMOS-compatible control lines (CE, CS, R/C, AO, 12/8) - supports both fully controlled and stand-alone operation without glue logic. |
| Dual Operation Modes | ADC774 Emulation Mode (VEE = –15V) and S/H Control Mode (VEE = +5V) - enables seamless migration from legacy designs and new high-performance architectures. |
| Laser-Trimmed Scaling Resistors | Supports four standard input ranges without external components - simplifies front-end design for factory automation and test equipment. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Continuous voltage monitoring of PLC analog I/O modules handling 4–20mA transducer signals conditioned to 0–10V range. IC Role / Device Role / Timing Role: Primary 12-bit digitizer interfacing directly to sensor signal chain; STATUS pin synchronizes microcontroller DMA reads at 100kHz. Use Value: ±1/2 LSB linearity ensures <0.01% full-scale error across temperature - meets IEC 61000-4-3 immunity-critical calibration requirements. | Use Scenario: High-throughput parametric testing of op-amps using DC accuracy and AC performance validation. IC Role / Device Role / Timing Role: Precision digitizer capturing device under test (DUT) output with 70dB SINAD and 8.5µs conversion cycle - enables 117k samples/sec throughput. Use Value: Internal 2.5V reference and laser-trimmed scaling eliminate external calibration components - reduces ATE channel cost by $1.20/unit. |
| Motor Drive Current Sensing | Power Quality Analyzers |
Use Scenario: Isolated shunt-based phase current measurement in 3-phase inverters, scaled to ±5V range. IC Role / Device Role / Timing Role: Bipolar offset binary (BOB) output ADC capturing fast current transients; R/C pin driven by PWM timer for deterministic sampling alignment. Use Value: 1.4µs settling time after full-scale step enables accurate capture of 10kHz switching harmonics - supports IEC 61800-3 compliance testing. | Use Scenario: Simultaneous voltage and current waveform capture in portable PQ meters using ±10V inputs from isolation amplifiers. IC Role / Device Role / Timing Role: Dual-channel synchronized digitizer (with second ADS774KEG4) acquiring 16-bit-equivalent waveforms at 50/60Hz fundamental + 50th harmonic. Use Value: 70dB SINAD at 10kHz input frequency ensures >11-bit ENOB for THD and interharmonic analysis per IEEE 519-2022. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS774KP | Same silicon, 28-pin 0.6" DIP package - identical electrical specs, larger footprint. | Used where legacy 0.6" socket compatibility is mandatory; requires PCB layout change vs. ADS774KEG4. | Select ADS774KP only when replacing ADC774 in existing 0.6" DIP sockets without board revision. |
| ADS7822U | 12-bit SAR ADC with SPI interface, 2.7–5.25V supply, 10µs conversion, SO-8 package - no internal reference or analog input scaling. | Requires external reference, level-shifting, and serial interface logic - suited for space-constrained, low-pin-count designs. | Choose ADS7822U for new compact designs prioritizing serial interface and lower power; not drop-in for ADS774KEG4. |
Compared with ADS774KP, ADS774KEG4 offers identical performance in a smaller 0.3" DIP footprint for higher-density layouts; compared with ADS7822U, it provides parallel interface, integrated reference, and multi-range scaling - reducing total system component count by 4–6 parts in industrial DAQ applications.
Availability
ADS774KEG4 is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, motor drive current sensing, and power quality analyzers requiring stable component supply and long-term obsolescence management.
Supply support for ADS774KEG4 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
Burr-Brown Corporation, acquired by Texas Instruments in 2000, specialized in precision analog ICs for industrial and instrumentation markets.
The ADS774 product line was designed for high-accuracy, microprocessor-integrated data acquisition in factory automation, test systems, and control applications - emphasizing drop-in upgrade paths and reduced external component count.
FAQ
What is the maximum operating temperature range for the ADS774KEG4?
The ADS774KEG4 is specified for 0°C to +70°C operation, with storage range extending to –65°C to +150°C. Its guaranteed ±1/2 LSB linearity and 70 dB SINAD apply across this full commercial temperature range, making it suitable for enclosed industrial enclosures without active cooling.
Does the ADS774KEG4 require an external reference voltage?
No, the ADS774KEG4 includes an internal 2.5V reference with ±0.1V tolerance and 0.5mA source capability. The REF OUT pin can drive external circuitry, and REF IN accepts feedback for full-scale calibration - eliminating need for external reference ICs in most applications.
How does the ADS774KEG4 handle different input voltage ranges?
The ADS774KEG4 supports ±10V, ±5V, 0–10V, and 0–20V ranges via laser-trimmed internal scaling resistors. Pins 13 (10V Range) and 14 (20V Range) are configured as open or grounded to select range - no external resistors needed, ensuring consistent gain accuracy across temperature.
Can the ADS774KEG4 replace an ADC774 in an existing design without changes?
Yes - when VEE (Pin 11) is connected to –15V, the ADS774KEG4 enters ADC774 Emulation Mode with matching timing, pinout, and control behavior. It fits standard 28-pin 0.3" DIP sockets and maintains software compatibility while improving power efficiency and DC accuracy.
What is the purpose of the STATUS pin on the ADS774KEG4?
The STATUS pin (Pin 28) is an active-high open-drain output that remains HIGH during conversion and falls only after data is latched and valid on DB0–DB11. It provides hardware-ready signaling for microcontrollers to synchronize data reads without polling or fixed delays - critical for deterministic real-time systems.
ADS774KEG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 125k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V, -16.5V ~ 5.5
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
ADS774KEG4 FAQ
1.How can I place an order for ADS774KEG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS774KEG4 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 ADS774KEG4 reliable?
The price and inventory of ADS774KEG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS774KEG4 is usually 5 days.
3.What payment methods are accepted for ADS774KEG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS774KEG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS774KEG4?
ADS774KEG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS774KEG4 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 ADS774KEG4?
For technical support, including ADS774KEG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS774KEG4 requirements.
6.How does Aetrix verify that ADS774KEG4 is sourced from the original manufacturer or authorized distributors?
All ADS774KEG4 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 ADS774KEG4 meets industry standards.
7.What is the process for return or replacement of ADS774KEG4?
All ADS774KEG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS774KEG4, 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 ADS774KEG4 part is unused and in its original packaging.
Return procedure for ADS774KEG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS774KEG4 Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
