ADS803E/1KG4 - 12-Bit 5MSPS ADC w/ Int/Ext Ref | Texas Instruments
MPN: ADS803E/1KG4 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.45 | $5,450.00 |
ADS803E/1KG4 Overview
A pipelined ADC is a type of analog-to-digital converter that resolves each analog sample across multiple low-resolution stages, with each stage feeding its residue to the next clock cycle. This pipeline architecture enables high throughput (MSPS-class) at moderate die area, making pipelined ADCs the workhorse of high-speed data acquisition, communications, video, medical imaging, and test instrumentation. The ADS803E/1KG4 sits in the broader hierarchy of: ADC -> data converter -> signal chain IC -> semiconductor.
Key differentiating specifications include a programmable 2 Vp-p or 5 Vp-p input range, internal or external reference option, TTL/CMOS-compatible digital outputs, and differential linearity that supports demanding imaging applications. Digital error-correction techniques ensure excellent DNL (differential non-linearity), while the low distortion and high SNR provide the extra margin needed for communications and video signal chains.
The ADS803E/1KG4 architecture uses a multi-stage switched-capacitor pipeline with digital error correction, achieving true 12-bit performance at 5 MSPS without the latency penalty of successive-approximation (SAR) ADCs. Its single +5V analog supply simplifies power-tree design versus split-rail converters, and the differential analog input rejects common-mode noise from upstream sensor or driver stages.
Typical applications include medical imaging front-ends, communications baseband IF sampling, CCD/CMOS image sensor digitizers, video digitizing, and test-and-measurement instrumentation where 12-bit resolution at 5 MSPS is sufficient. The 28-SSOP footprint is also a near-universal upgrade path to the ADS804 (10 MSPS) and ADS805 (20 MSPS) for future-proof designs.
When designing with this converter, ensure the analog input common-mode voltage stays within the specified range, place a small RC anti-aliasing filter at AINP/AINN, and decouple AVDD and DVDD with separate 0.1 uF + 10 uF ceramic capacitors close to the pins. The internal reference eliminates an external reference IC in cost-sensitive designs; for best DC accuracy use an external 2.500V reference. According to TI, the digital outputs can drive TTL and CMOS loads directly without external buffers below 5 pF.
This page synthesizes distributor pricing, drop-in alternatives from the TI ADS80x family, and PCB design notes that go beyond the manufacturer datasheet - including thermal and reference-decoupling guidance not found on TI.com.
Drop-in alternatives for ADS803E/1KG4 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADS803E/1KG4 (same form factor and footprint) — differing in Operating Temperature, Package, Reference, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADS803E
✅ Drop-In📋 Reference alternative (not in catalog)
ADS803EG4
✅ Drop-In📋 Reference alternative (not in catalog)
ADS804E/1K
✅ Drop-In📋 Reference alternative (not in catalog)
ADS805E/1KG4
✅ Drop-In✓ In Stock
$6.94 / Unit
View Datasheet →ADS804E
✅ Drop-In📋 Reference alternative (not in catalog)
ADS805E
✅ Drop-In📋 Reference alternative (not in catalog)
ADS803E/1KG4 Maximum Ratings & Electrical Characteristics
| Resolution | 12 bits |
| Sample Rate | 5 MSPS |
| Number of Inputs | 1 (single-ended/differential) |
| Architecture | Pipelined |
| Input Voltage Range | 2 Vp-p (programmable, 5 Vp-p option) |
| Reference | Internal 2.5V or external |
| Supply Voltage (Analog) | 5 V single supply |
| Supply Voltage (Digital) | 5 V (AVDD = DVDD) |
| Operating Temperature | -40C to +85C (industrial) |
| Package | 28-SSOP |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (G4 suffix denotes Pb-free) |
| Input Type | Differential analog |
| Output Interface | Parallel, TTL/CMOS-compatible |
| Temperature Grade | Industrial |
ADS803E/1KG4 Pin Configuration
| Pin 1 | AINP — Differential analog input, positive |
| Pin 2 | AINN — Differential analog input, negative |
| Pin 3 | REFBSET — Reference bias / external bypass |
| Pin 4 | REFIN — External reference input (if used) |
| Pin 5 | REFOUT — Internal 2.5V reference output |
| Pin 6 | AGND — Analog ground |
| Pin 7 | AVDD — Analog +5V supply |
| Pin 8 | DVDD — Digital +5V supply |
| Pin 9 | DGND — Digital ground |
| Pin 10 | OE — Output enable (active low) |
| Pin 11 | CLK — Sampling clock input |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | DB11 — Data bit 11 (MSB) |
| Pin 14 | DB10 — Data bit 10 |
| Pin 15 | DB9 — Data bit 9 |
| Pin 16 | DB8 — Data bit 8 |
| Pin 17 | DB7 — Data bit 7 |
| Pin 18 | DB6 — Data bit 6 |
| Pin 19 | DB5 — Data bit 5 |
| Pin 20 | DB4 — Data bit 4 |
| Pin 21 | DB3 — Data bit 3 |
| Pin 22 | DB2 — Data bit 2 |
| Pin 23 | DB1 — Data bit 1 |
| Pin 24 | DB0 — Data bit 0 (LSB) |
| Pin 25 | NC — Not connected (per datasheet) |
| Pin 26 | RANGE — Input range select (2Vp-p or 5Vp-p) |
| Pin 27 | STBY — Standby mode (active high) |
| Pin 28 | AGND — Analog ground |
Typical Applications
ADS803E/1KG4 is suitable for 6 applications: Medical Imaging Front-End, Communications Baseband Digitizing, CCD/CMOS Image Sensor Digitizer, Video Digitizing, Test and Measurement Instrumentation, Industrial Process Control Data Acquisition.
Medical Imaging Front-End
The ADS803E/1KG4's 12-bit resolution at 5 MSPS with digital-error-corrected pipelined architecture is well matched to ultrasound and endoscopy front-ends that digitize 5 MHz-class IF signals. Its 2.5V internal reference and differential analog input reject common-mode noise from upstream LNA stages, while the industrial -40C to +85C temperature grade supports operating-room equipment. Designers should pair the converter with a low-noise front-end op-amp, place 0.1 uF+10 uF ceramic decoupling on AVDD/DVDD, and accept the 5 MSPS cap as adequate for sub-2 MHz baseband imaging. Same-family TI ADS804/ADS805 upgrades enable future throughput scaling on the same PCB.
Recommended
Communications Baseband Digitizing
Where a 5 MHz IF signal chain feeds a DSP, the ADS803E/1KG4 provides 12-bit dynamic range at 5 MSPS - sufficient for narrow-band baseband receivers in proprietary radio and telemetry links. Digital error correction preserves DNL under demanding modulation, and the TTL/CMOS output bus connects directly to a CPLD or DSP data port without external buffers below 5 pF. Compare against the ADS804E/1KG4 (10 MSPS) on the same PCB if your channel bandwidth grows; the SSOP-28 pinout stays identical so no layout rework is needed.
Recommended
CCD/CMOS Image Sensor Digitizer
For video-rate digitizing of CCD or CMOS image sensor outputs the ADS803E/1KG4's pipelined architecture captures single-shot frames at low latency, and the programmable 2 Vp-p input range matches typical image-sensor full-scale outputs. Excellent differential linearity supports demanding imaging pipelines where pixel-level gradients must be preserved across frames. The 28-SSOP footprint is shared with the pin-compatible ADS805E (20 MSPS), letting the same PCB accept HD-rate video streams if your camera design scales up later. Designers should isolate analog and digital grounds and use a low-jitter clock for best SNR.
Recommended
Video Digitizing
Standard-definition video digitizers typically run at 10-20 MSPS, so the ADS803E/1KG4 covers compressed video and CCTV streams, while the pin-compatible ADS804E and ADS805E provide headroom for full SDTV rates on the same PCB. The pipelined architecture delivers low-latency single-cycle acquisition suitable for real-time video processing. Designers should keep analog traces short and routed over a continuous ground plane; the SSOP-28 pinout's REFIN/REF pins require a 0.1 uF+10 uF local bypass. Use the internal 2.5V reference for cost-sensitive consumer video gear.
Recommended
Test and Measurement Instrumentation
Bench-top oscilloscopes, spectrum analyzers, and data-acquisition cards use the ADS803E/1KG4 to digitize repetitive waveforms where 12-bit vertical resolution and 5 MSPS real-time rate balance price and performance. Low distortion and high SNR give the extra dynamic-range margin critical for harmonic and intermodulation measurements. The parallel CMOS output bus interfaces cleanly with an FPGA capture FIFO; engineers should provide a low-jitter sampling clock and maintain 50-ohm-controlled-impedance analog traces for repeatable measurements.
Recommended
Industrial Process Control Data Acquisition
For multi-channel industrial data-acquisition systems the ADS803E/1KG4's industrial temperature grade (-40C to +85C) and single +5V supply handle factory-floor noise and temperature swings. Its pipelined architecture gives higher throughput than SAR ADCs while keeping per-channel cost low, making it suitable for vibration monitoring, motor-control feedback, and process-sensor digitizers. Team the converter with an analog mux for channel expansion; isolate digital and analog grounds, and use wide PCB traces for the analog supply to minimize voltage-drop on AVDD under 5 MSPS bursts.
Recommended
Recommended Products Summary
Engineering reference data for ADS803E/1KG4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS803E | ADS803EG4 | ADS804E/1K | ADS805E/1KG4 | ADS804E | ADS805E |
|---|---|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Sample Rate | 5 MSPS | 5 MSPS | 5 MSPS | 10 MSPS (+100%) | 20 MSPS (+300%) | 10 MSPS | 20 MSPS |
| Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
| Input Range | 2 Vp-p or 5 Vp-p programmable | 2 Vp-p or 5 Vp-p programmable | 2 Vp-p or 5 Vp-p programmable | 2 Vp-p or 5 Vp-p programmable | 2 Vp-p or 5 Vp-p programmable | 2 Vp-p or 5 Vp-p programmable | 2 Vp-p or 5 Vp-p programmable |
| Reference | Internal 2.5V or external | Internal 2.5V or external | Internal 2.5V or external | Internal 2.5V or external | Internal 2.5V or external | Internal 2.5V or external | Internal 2.5V or external |
| Temperature Grade | Industrial -40C to +85C | Industrial | Industrial | Industrial | Industrial | Industrial | Industrial |
| Pin-to-Pin Compatibility | Family base (5 MSPS) | Yes | Yes | Yes (10 MSPS upgrade) | Yes (20 MSPS upgrade) | Yes | Yes |
Key Differentiators
- Pin-compatible family scalability (vs ADS805E/1KG4)
- Lowest-cost member of TI ADS80x pin-compatible family (vs ADS804E/1K)
- Internal 2.5V reference eliminates external reference IC (vs AD9224 (Analog Devices, not pin-compatible))
Design Notes
The ADS803E/1KG4 requires a clean analog +5V (AVDD) and digital +5V (DVDD) supply. Place a 0.1 uF X7R ceramic bypass as close as possible to each supply pin, with a bulk 10 uF tantalum or aluminum-polymer cap nearby. Per the TI reference design, separate AVDD and DVDD with ferrite beads to prevent digital switching noise from corrupting the analog substrate - this is critical at 5 MSPS where fast output transitions cause significant transient current on DVDD.
Use a continuous analog ground plane under the AINP/AINN, REFIN, REFOUT and AGND pins; do not split the ground plane underneath the converter. Route the sampling clock (CLK) with controlled 50-ohm impedance and keep it away from analog input traces by at least 3x their width. Per the TI layout checklist in the datasheet, place the reference decoupling cap directly between REFOUT and the nearest AGND via - long traces here will degrade SNR by several dB.
Two common pitfalls when using the ADS803E/1KG4: (1) Driving AINP/AINN below the allowed common-mode range will cause severe SNR degradation; add a coupling transformer or DC-bias network. (2) Exceeding 5 Vp-p input range with the RANGE pin tied high can saturate the front-end; verify your sensor output amplitude and select RANGE accordingly. Always deassert OE during power-up to keep outputs high-impedance until the supply settles.
Compliance Information
The /1KG4 suffix denotes lead-free (Pb-free, G4) shipping. RoHS compliance per Texas Instruments product page. Industrial temperature grade; not AEC-Q100 qualified.